Learn Java , .Net , Paython : for Beginners, Intermediate, and Advanced Programmers in Palampur

DisplayTag Search with Spring MVC

This example show how add search filter in display tag.It's work same as it Displaytag table search Here you can find more info for display:header tag if you want to implement this first visit this link here you can find what you need to add search filter in table :-

Spring + display tag example is here :- Spring + display tag integration example you just need to replace displayTag.jsp to this and add 2 js file to do this:-

jquery.js
jquery.dataTables.min.js

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ taglib prefix="display" uri="http://displaytag.sf.net/el"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>








 
  
  
  
  
  
  
  
 
 
 

Done :) Here Is output

Spring MVC and DisplayTag Example , Pagination

Here I am posting display tag example with Spring. If you need more info about display tag refer this example :-Struts2 pagination using display tag

web.xml

 Spring3Example
 
  dispatcher
  org.springframework.web.servlet.DispatcherServlet
  1
 
 
  dispatcher
  /forms/*
 
 
  index.jsp
 

dispatcher-servlet.xml

 
 

 
 

  
   /WEB-INF/views/
  
  
   .jsp
  
 
 
 
 

index.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>







View User Info

bootstrap.min.css
displayTag.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ taglib prefix="display" uri="http://displaytag.sf.net/el"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>








 
  
  
  
  
  
  
  
 

user.java

package com.javastoreroom.bean;

public class User {

 private String name;
 private String firstName;
 private String lastName;
 private String nickName;
 private String modernName;
 private String section;
 private String address;

 public User(String names, String first, String last, String nick,
   String modren, String section, String address) {
  this.name = names;
  this.firstName = first;
  this.lastName = last;
  this.nickName = nick;
  this.modernName = modren;
  this.section = section;
  this.address = address;

 }

 public String getName() {
  return name;
 }

 public void setName(String name) {
  this.name = name;
 }

 public String getFirstName() {
  return firstName;
 }

 public void setFirstName(String firstName) {
  this.firstName = firstName;
 }

 public String getLastName() {
  return lastName;
 }

 public void setLastName(String lastName) {
  this.lastName = lastName;
 }

 public String getNickName() {
  return nickName;
 }

 public void setNickName(String nickName) {
  this.nickName = nickName;
 }

 public String getModernName() {
  return modernName;
 }

 public void setModernName(String modernName) {
  this.modernName = modernName;
 }

 public String getSection() {
  return section;
 }

 public void setSection(String section) {
  this.section = section;
 }

 public String getAddress() {
  return address;
 }

 public void setAddress(String address) {
  this.address = address;
 }

}

PaginateController

package com.javastoreroom.controllers;

import java.util.ArrayList;
import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.javastoreroom.bean.User;

@Controller
@RequestMapping("displayTag.html")
public class PaginateController {

 @RequestMapping(method = RequestMethod.GET)
 public String fetchUserList(Model model) {

  List users = new ArrayList<>();

  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "A",
    "Palampur"));
  users.add(new User("Sonu Kumar", "Arun", "Kumar", "Anu", "Aryan", "B",
    "Palampur"));
  users.add(new User("Pawan Kumar", "Arun", "Kumar", "Anu", "Aryan", "C",
    "Palampur"));
  users.add(new User("Satish Kumar", "Arun", "Kumar", "Anu", "Aryan", "D",
    "Palampur"));
  users.add(new User("Arrus Kumar", "Arun", "Kumar", "Anu", "Aryan", "E",
    "Palampur"));
  users.add(new User("Rihan Kumar", "Arun", "Kumar", "Anu", "Aryan", "F",
    "Palampur"));
  users.add(new User("Rishav Kumar", "Arun", "Kumar", "Anu", "Aryan", "G",
    "Palampur"));
  users.add(new User("Test Kumar", "Arun", "Kumar", "Anu", "Aryan", "H",
    "Palampur"));
  users.add(new User("Hello Kumar", "Arun", "Kumar", "Anu", "Aryan", "J",
    "Palampur"));
  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "K",
    "Palampur"));
  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "L",
    "Palampur"));
  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "M",
    "Palampur"));
  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "N",
    "Palampur"));
  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "O",
    "Palampur"));
  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "P",
    "Palampur"));
  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "Q",
    "Palampur"));
  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "R",
    "Palampur"));
  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "S",
    "Palampur"));
  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "T",
    "Palampur"));
  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "Q",
    "Palampur"));
  users.add(new User("Arun Kumar", "Arun", "Kumar", "Anu", "Aryan", "X",
    "Palampur"));
  model.addAttribute("userList", users);
  return "displayTag";

 }

}

Done :) here is out put :-

freeze table header and left column

While i am freeze table header or first column , Google to find .There are lot's of way to do it. I try via jquery but it conflict some existing js. After spanding a 2-3 day find a script to do this and optimize to less and it's work there are 5-6 number of line in JavaScript and some css.it's run without any conflict or error and working on all browser.

If you would like to create a table with scrollable data. I have to freeze the first header row and first column of the table.Below is example :-
style.css

.midcontainer {
 width: 100%;
 height: 200px;
 table-layout: fixed;
}

table.root {
 table-layout: fixed;
 width: 100%;
}

table.content {
 table-layout: fixed;
 width: 100%;
}

table.head {
 table-layout: fixed;
 width: 1890px;
}

table.frozen {
 table-layout: fixed;
 width: 100%;
}

.horizontal-scroll {
 width: 98%;
 height: 22px;
 overflow: hidden;
 overflow-x: scroll;
}

.horizontal-scroll div {
 width: 2173px;
 height: 1px;
}

.vertical-scroll {
 height: 200px;
 width: 22px;
 overflow: hidden;
 overflow-y: scroll;
 /* border: solid 1px #666; */
}

.vertical-scroll div {
 height: 377px;
 width: 1px;
}

.columnStyle {
 padding: 3px;
 height: 28px;
 border-collapse: separate;
 border-color: -moz-use-text-color #CCCCCC #CCCCCC -moz-use-text-color;
 border-style: none dotted solid none;
 border-width: 0 1px 1px 0;
 border-color: -moz-use-text-color #CCCCCC #CCCCCC -moz-use-text-color;
 border-style: none dotted solid none;
 width: 200px;
 overflow: hidden;
 text-overflow: ellipses;
 white-space: nowrap;
}

td {
 border-left: none;
 width: 100 px;
 text-align: left;
}

td.head {
 background-color: #CAEBFA;
}

div.root {
 margin-left: 0px;
 overflow: hidden;
 width: 100%;
 height: 28px;
}

.frozen {
 overflow: hidden;
 width: 100%;
 height: 200px;
}

.divhead {
 overflow: hidden;
 height: 28px;
 width: 100%;
}

.content {
 height: 200px;
 overflow-x: hidden;
 overflow-y: auto;
 width: 100%;
 width: 100%;
}

.tableumn {
 width: 150px;
}

.tablecontent {
 width: 501px;
}

.tableverticalscroll {
 width: 2px;
}

Scroll.html

 
    


        
Name
       
        
Arun
       
        
Aryan
       
        
Jessica
       
        
Renu
       
        
Manisha
       
        
Arrus
       
        
Rehan
       
        
Riyaj
       
        
Palak
       
        
Jessica
       
    


         
Class
 
Roll No
         
Ref
         
City
         
H.No
         
Country
         
Opening Timing
         
Closing Timing
         
Section
         
Other
        
  
9th
         
10
         
Test
         
Chandigrah
         
#32
         
India
         
09:10am
         
05:30pm
         
XXX
         
ZZZ
       
         
9th
         
10
         
Test
         
Chandigrah
         
#32
         
India
         
09:10am
         
05:30pm
         
XXX
         
ZZZ
        
         
9th
         
10
         
Test
         
Chandigrah
         
#32
         
India
         
09:10am
         
05:30pm
         
XXX
         
ZZZ
        
 
9th
         
10
         
Test
         
Chandigrah
         
#32
         
India
         
09:10am
         
05:30pm
         
XXX
         
ZZZ
        
         
9th
         
10
         
Test
         
Chandigrah
         
#32
         
India
         
09:10am
         
05:30pm
         
XXX
         
ZZZ
        
 
9th
         
10
         
Test
         
Chandigrah
         
#32
         
India
         
09:10am
         
05:30pm
         
XXX
         
ZZZ
        
         
9th
         
10
         
Test
         
Chandigrah
         
#32
         
India
         
09:10am
         
05:30pm
         
XXX
         
ZZZ
        
         
9th
         
10
         
Test
         
Chandigrah
         
#32
         
India
         
09:10am
         
05:30pm
         
XXX
         
ZZZ
        
         
9th
         
10
         
Test
        
Chandigrah
       
#32
         
India
         
09:10am
         
05:30pm
         
XXX
         
ZZZ
        
     
    
     


   

:) Done May be this help you and save some value able time

below is image while run:-

even odd row index in thymeleaf

If you want to change row color in even odd pattern in table try this example :-

:)

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: algorithm check failed: MD2withRSA is disabled

Getting below exception while authenticating oauth url in quick book.It's a probably a Jdk issue my version of JDK 1.6.19 release. I m read some java forum or doc find a solution. Problem in some JDK realese (1.6.17 ,18 , 19). When i am upgrade to 20+ release everything goes well.

signedRequestTokenUrl: https://oauth.intuit.com/oauth/v1/get_request_token?oauth_signature=7BbMjH%2FEFPqqYAA6xQwtH%2FIvJXU

%3D&oauth_callback=http%3A%2F%2F127.0.0.1%3A8080%2FAccessTokenServlet

+&oauth_consumer_key=qyprdz8dcN2FN9VXa08cyBFFPV7unk&oauth_version=1.0&oauth_signature_method=HMAC-

SHA1&oauth_timestamp=1394090223&oauth_nonce=1584133679482369323
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path validation failed: 

java.security.cert.CertPathValidatorException: algorithm check failed: MD2withRSA is disabled
 at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174)
 at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1623)
 at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:198)
 at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:192)
 at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1074)
 at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:128)
 at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:529)
 at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Handshaker.java:465)
 at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:884)
 at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1120)
 at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1147)
 at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1131)
 at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:434)
 at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:166)
 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1049)
 at com.sun.net.ssl.internal.www.protocol.https.HttpsURLConnectionOldImpl.getInputStream(HttpsURLConnectionOldImpl.java:204)
 at com.opnsys.quickbooks.OauthHelper.getRequestToken(OauthHelper.java:169)
 at com.opnsys.servlets.RequestTokenServlet.doPost(RequestTokenServlet.java:48)
 at com.opnsys.servlets.RequestTokenServlet.doGet(RequestTokenServlet.java:40)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
 at java.lang.Thread.run(Thread.java:619)
Caused by: sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: 

algorithm check failed: MD2withRSA is disabled
 at sun.security.validator.PKIXValidator.doValidate(PKIXValidator.java:260)
 at sun.security.validator.PKIXValidator.doValidate(PKIXValidator.java:243)
 at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:167)
 at sun.security.validator.Validator.validate(Validator.java:218)
 at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:126)
 at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:209)
 at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:249)
 at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1053)
 ... 28 more
Caused by: java.security.cert.CertPathValidatorException: algorithm check failed: MD2withRSA is disabled
 at sun.security.provider.certpath.PKIXMasterCertPathValidator.validate(PKIXMasterCertPathValidator.java:139)
 at sun.security.provider.certpath.PKIXCertPathValidator.doValidate(PKIXCertPathValidator.java:328)
 at sun.security.provider.certpath.PKIXCertPathValidator.engineValidate(PKIXCertPathValidator.java:178)
 at java.security.cert.CertPathValidator.validate(CertPathValidator.java:250)
 at sun.security.validator.PKIXValidator.doValidate(PKIXValidator.java:255)
 ... 35 more
Error: Failed to get request token.
Authorize URL: https://appcenter.intuit.com/Connect/Begin?oauth_token=lvprdUC5OD2rVJzFSE8nSMt8BTxILtgrjGLJI7zdl6uj86N9
https://appcenter.intuit.com/Connect/Begin?

:)

org.springframework.orm.hibernate3.HibernateSystemException: Null value was assigned to a property of primitive type setter of com.javastoreroom.entity.EmployeModule;

Getting below exception while running project :-

org.springframework.orm.hibernate3.HibernateSystemException: Null value was assigned to a property of primitive type setter of com.javastoreroom.entity.EmployeModule; 

nested exception is org.hibernate.PropertyAccessException: Null value was assigned to a property of primitive type setter of com.javastoreroom.entity.EmployeModule
 at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:690)
 at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:106)
 at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:403)
 at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:58)
 at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213)
 at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:163)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
 at org.springframework.data.jpa.repository.support.LockModeRepositoryPostProcessor$LockModePopulatingMethodIntercceptor.invoke

(LockModeRepositoryPostProcessor.java:92)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
 at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
 at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
 at $Proxy124.findModuleByModuleName(Unknown Sourat com.javastoreroom.service.impl.findByName(ServiceImpl.java:420)
 at com.javastoreroom.service.impl.findByName(ServiceTenantImpl.java:395)
 at com.javastoreroom.web.controller.EmployeeController.Name(EmployeeController.java:266)
 at com.javastoreroom.web.controller.EmployeeController$$FastClassByCGLIB$$6fe0e153.invoke()
 ce)
 at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
 at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:627)
 at com.javastoreroom.web.controller.EmployeeController$$EnhancerByCGLIB$$4b3962fc.Name()
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:601)
 at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
 at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
 at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
 at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
 at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
 at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
 at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
 at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
 at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
 at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
 at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
 at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
 at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
 at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:146)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
 at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
 at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
 at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
 at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
 at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
 at com.github.dandelion.datatables.extras.servlet2.filter.DatatablesFilter.doFilter(DatatablesFilter.java:71)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
 at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
 at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
 at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
 at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
 at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
 at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
 at java.lang.Thread.run(Thread.java:722)
Caused by: org.hibernate.PropertyAccessException: Null value was assigned to a property of primitive type setter of com.javastoreroom.entity.EmployeModule
 at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:108)
 at org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues(AbstractEntityTuplizer.java:710)
 at org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:371)
 at org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:4509)
 at org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity(TwoPhaseLoad.java:186)
 at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:137)
 at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:1107)
 at org.hibernate.loader.Loader.processResultSet(Loader.java:963)
 at org.hibernate.loader.Loader.doQuery(Loader.java:910)
 at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:341)
 at org.hibernate.loader.Loader.doList(Loader.java:2522)
 at org.hibernate.loader.Loader.doList(Loader.java:2508)
 at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2338)
 at org.hibernate.loader.Loader.list(Loader.java:2333)
 at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:490)
 at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:355)
 at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:195)
 at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1269)
 at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101)
 at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:283)
 at org.hibernate.ejb.criteria.CriteriaQueryCompiler$3.getSingleResult(CriteriaQueryCompiler.java:258)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:601)
 at org.springframework.orm.jpa.SharedEntityManagerCreator$DeferredQueryInvocationHandler.invoke(SharedEntityManagerCreator.java:311)
 at $Proxy145.getSingleResult(Unknown Source)
 at org.springframework.data.jpa.repository.query.JpaQueryExecution$SingleEntityExecution.doExecute(JpaQueryExecution.java:123)
 at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:55)
 at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:95)
 at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:85)
 at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:312)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
 at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)
 at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)
 at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
 at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:155)
 ... 92 more
Caused by: java.lang.IllegalArgumentException
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:601)
 at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:65)
 ... 129 more

After spending few hour to know reason but not find any relevant solution below is my EmployeModule Entity:-

package com.javastoreroom.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

/**
 * @author Arun
 * 
 */
@Entity
@Table(name = "module")
public class EmployeModule
{
  private Integer eId;
  private boolean status;
  private String docUrl;


//Generate getter setter property 

 }

Change to this :-

package com.javastoreroom.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

/**
 * @author Arun
 * 
 */
@Entity
@Table(name = "module")
public class EmployeModule
{
  private Integer eId;
  private Boolean status;
  private String docUrl;


//Generate getter setter property 

 }

Reading first line of exception find solution it says i am assign a null value to primitive data type. Here is boolean primitive type and i am assign a null to status. When i change boolean to Boolean wrapper class it working fine. :)

Toggle image in jquery , jquery - toggle arrow

If you want to toggle between 2 images either on click show or hide content arrow up or down below is a sample to do this :-

JavaScript

Css

.trigger {
background: url(http://etc-mysitemyway.s3.amazonaws.com/icons/legacy-previews/icons-256/3d-transparent-glass-icons-arrows/006768-3d-transparent-glass-icon-arrows-arrows-up-down1.png) 0px -20px no-repeat;
    cursor: pointer;
    height: 95px;
    left: -77px;
    position: absolute;
    top: 36px;
    width: 15%;
}

Add Above css and js in imagetoggle.jsp

imagetoggle.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>







Is it possible to make an down arrow image (class of .trigger) change to an image of an
up-arrow when clicked? Basically, I'm using an image with the class of
.trigger to toggle the div of .links, and when .links is revealed
(slided down), I want the arrow to face up instead of down to show that
users can click it again to hide .links again. Once the user hides links
by clicking the UP arrow, I want it to change to the down arrow again.
It's a lot of explaining for a simple task, but hopefully you guys
understand what I'm asking. The toggle code:

while running above jsp you get below output :-

click on above image you get final output and image toggle effect :-

:)

Struts2- Gson Response Example

Gson is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object.Download Google Gson Jar either add maven dependency:-

pom.xml

 com.google.code.gson
 gson
 2.2.4

Two Main method we use for conversion :-

1. toJson(Object src) 
   //This method serializes the specified object into its equivalent Json representation.
2. fromJson(JsonElement json, Class XXXX)
   //This method deserializes the Json read from the specified parse tree into an object of the specified type.

Gson Goals or benefit:-

1:- Provide simple toJson() and fromJson() methods to convert Java objects to JSON and vice-versa
2:- Allow pre-existing unmodifiable objects to be converted to and from JSON
3:- Extensive support of Java Generics
4:- Allow custom representations for objects
5:- Support arbitrarily complex objects (with deep inheritance hierarchies and extensive use of generic types)

Here is Sample Code how to work :-

web.xml

 Struts2Gson

 
  struts2
  org.apache.struts2.dispatcher.FilterDispatcher
 

 
  struts2
  /*
 



 
  jsonResponse.jsp
 

struts.xml

JsonAction.java

package com.javastoreroom.display.action;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.ServletActionContext;

import com.google.gson.Gson;
import com.javastoreroom.display.bean.Employee;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class JsonAction extends ActionSupport {

 /**
  * @author Arun
  */
 private static final long serialVersionUID = 1L;
 
 
private List  list = null;
public String fetchName(){
HttpServletResponse  response = (HttpServletResponse) ActionContext.getContext().get(ServletActionContext.HTTP_RESPONSE);
  PrintWriter out = null;
  try{
   out = response.getWriter();
   response.setContentType("text/html;charset=UTF-8");
   List emplList = getListEmployees();
   Gson gson  = new Gson();
   String content = gson.toJson(emplList);
   System.out.println(content);
      out.println("{\"Employee\":"+content+"}");
  }catch (IOException e) {
   e.printStackTrace();
  }finally{
   out.flush();
   out.close();
  }
  return null;
 }
 
  private List getListEmployees() {
  list = new ArrayList();
  {
   list.add(new Employee(1, "Arun"));
   list.add(new Employee(2, "Anu"));
   list.add(new Employee(3, "Aryan"));
   list.add(new Employee(4, "Alex"));
   list.add(new Employee(5, "Jass"));
   list.add(new Employee(6, "Jassica"));
   list.add(new Employee(7, "Akon"));
   list.add(new Employee(8, "Himesh"));
   list.add(new Employee(9, "Sonu"));
  }
  return list;
 }


 public List getEmployees() {
  return employees;
 }

 public void setEmployees(List employees) {
  this.employees = employees;
 }
}

#content a {
 padding: 4px;
 margin-bottom: 2px;
 background-color: #dedede;
 font-family: arial;
}

jsonResponse.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>

After executing project you with below output in json or view format:-

JSON Response :-


:)

Initial Session factory createion Errororg/objectweb/asm/Type Exception in thread "main" java.lang.ExceptionInInitializerError

If you getting bellow exception while executing project. Reason behind this add asm jar in your lib folder either add maven dependency in pom.xml :-

 asm
 asm-all
 3.1

Initial Session factory createion Errororg/objectweb/asm/Type
Exception in thread "main" java.lang.ExceptionInInitializerError
 at com.javastoreroom.session.config.HibernateUtils.(HibernateUtils.java:16)
 at com.javastoreroom.dao.PropertiesDAOImpl.persistContent(PropertiesDAOImpl.java:17)
 at com.javastoreroom.properties.Main.ReadProperties.main(ReadProperties.java:24)
Caused by: java.lang.NoClassDefFoundError: org/objectweb/asm/Type
 at net.sf.cglib.core.TypeUtils.parseType(TypeUtils.java:180)
 at net.sf.cglib.core.KeyFactory.(KeyFactory.java:66)
 at net.sf.cglib.proxy.Enhancer.(Enhancer.java:69)
 at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:117)
 at org.hibernate.proxy.pojo.cglib.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:43)
 at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:162)
 at org.hibernate.tuple.entity.AbstractEntityTuplizer.(AbstractEntityTuplizer.java:135)
 at org.hibernate.tuple.entity.PojoEntityTuplizer.(PojoEntityTuplizer.java:55)
 at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.(EntityEntityModeToTuplizerMapping.java:56)
 at org.hibernate.tuple.entity.EntityMetamodel.(EntityMetamodel.java:302) 
 at org.hibernate.persister.entity.AbstractEntityPersister.(AbstractEntityPersister.java:434)
 at org.hibernate.persister.entity.SingleTableEntityPersister.(SingleTableEntityPersister.java:109)
 at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)
 at org.hibernate.impl.SessionFactoryImpl.(SessionFactoryImpl.java:226)
 at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1300)
 at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:915)
 at com.insonix.session.config.HibernateUtils.(HibernateUtils.java:12)
 ... 2 more
Caused by: java.lang.ClassNotFoundException: org.objectweb.asm.Type
 at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
 at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
 ... 19 more

Initial Session factory createion Errororg/apache/commons/collections/SequencedHashMap

If you getting bellow exception while executing project. Reason behind this add Apache Commons Collections jar in your lib folder either add maven dependency in pom.xml :-

 commons-collections
 commons-collections
 3.2.1

Initial Session factory createion Errororg/apache/commons/collections/SequencedHashMap
Exception in thread "main" java.lang.ExceptionInInitializerError
 at com.javastoreroom.session.config.HibernateUtils.(HibernateUtils.java:16)
 at com.javastoreroom.dao.PropertiesDAOImpl.persistContent(PropertiesDAOImpl.java:17)
 at com.javastoreroom.properties.Main.ReadProperties.main(ReadProperties.java:24)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/collections/SequencedHashMap
 at org.hibernate.mapping.Table.(Table.java:33)
 at org.hibernate.cfg.Mappings.addTable(Mappings.java:165)
 at org.hibernate.cfg.annotations.TableBinder.fillTable(TableBinder.java:145)
 at org.hibernate.cfg.annotations.EntityBinder.bindTable(EntityBinder.java:410)
 at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:553)
 at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:498)
 at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:277)
 at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292)
 at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:915)
 at com.insonix.session.config.HibernateUtils.(HibernateUtils.java:12)
 ... 2 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections.SequencedHashMap
 at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
 at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
 ... 12 more

:)

Struts2 export excel Apache POI

Apache POI library is Java APIs for manipulating various file formats based upon the Office Open XML standards (OOXML) and Microsoft's OLE 2 Compound Document format (OLE2).OLE2 files include most Microsoft Office files such as XLS, DOC, and PPT. You can read and write MS Excel , MS Word , MS PowerPoint files using Java. Apache POI is your Java Excel solution (for Excel 97-2008).

Some of acronym use here :-

1. HSSF (Horrible SpreadSheet Format) – reads and writes Microsoft Excel (XLS) format files.


In this example we will use Apache POI library to perform Microsoft Excel spreadsheet export operation via Struts2. Download poi.jar & add to lib folder either add Maven as dependency in pom.xml

 org.apache.poi
 poi
 3.9

Create a web project with required struts2 jar & also poi.jar.

struts.xml

 


 
 

  
   /exporttoexcel.jsp
  

  
   
    attachment;filename="${reportFile}"application/vnd.ms-excelinputStream1024
  
 
 

web.xml

 ApachePOIExport


 
  struts2
  org.apache.struts2.dispatcher.FilterDispatcher
 

 
  struts2
  /*
 

 
  index.jsp
 

StudentBean.java

package com.struts2.javastoreroom;

public class StudentBean {

 private int id;
 private String name;

 public StudentBean(int id, String name) {
  this.id = id;
  this.name = name;
 }

 public int getId() {
  return id;
 }

 public void setId(int id) {
  this.id = id;
 }

 public String getName() {
  return name;
 }

 public void setName(String name) {
  this.name = name;
 }

}

RetrieveAction.java

package com.struts2.javastoreroom;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;

import com.opensymphony.xwork2.ActionSupport;

@SuppressWarnings("serial")
public class RetrieveAction extends ActionSupport {

 /**
  * @author Arun
  */

 private List nameList = new ArrayList();
 private InputStream inputStream;
 private String reportFile;

 public String fetchName() {

  return SUCCESS;
 }

 /**
  * student data to export , get from database if you export from database
  * 
  * @return {@link List}
  */

 private List fetchList() {

  {
   nameList.add(new StudentBean(1, "Arun"));
   nameList.add(new StudentBean(2, "Anu"));
   nameList.add(new StudentBean(3, "Aryan"));
   nameList.add(new StudentBean(4, "Anu"));
   nameList.add(new StudentBean(5, "Aranv"));
   nameList.add(new StudentBean(6, "Arun"));
  }
  return nameList;
 }

 /**
  * create HSSF read and write in spreadsheets
  * 
  * @return
  */

 public String exportEmployeeDetails() {
  HSSFWorkbook myWorkBook = new HSSFWorkbook();
  HSSFSheet mySheet = myWorkBook.createSheet();
  try {
   Calendar calendar = Calendar.getInstance();
   List studentBeans = fetchList();
   reportFile = "Student Report" + calendar.get(Calendar.YEAR)
     + "".concat(".xls");

   Row headerRow = mySheet.createRow(0);
   headerRow.setHeightInPoints(50);
   Cell titleCell = headerRow.createCell(0);
   titleCell.setCellValue("Student Report "
     + calendar.get(Calendar.YEAR) + "");

   setStudentAllInfo(mySheet, studentBeans);

   try {
    ByteArrayOutputStream boas = new ByteArrayOutputStream();
    myWorkBook.write(boas);
    setInputStream(new ByteArrayInputStream(boas.toByteArray()));
   } catch (IOException e) {
    e.printStackTrace();
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
  return SUCCESS;
 }

 /**
  * setting field value as you want to export in .xls
  * 
  * @param mySheet
  * @param studentBeans
  */

 private void setStudentAllInfo(HSSFSheet mySheet,
   List studentBeans) {
  int rowNum = 2;
  HSSFRow myRow = null;
  final String[] errorSource = { "Id", "Name" };
  try {
   Row header = mySheet.createRow(1);
   for (int i = 0; i < errorSource.length; i++) {
    Cell monthCell = header.createCell(i);
    monthCell.setCellValue(errorSource[i]);
   }
   for (StudentBean studentBean : studentBeans) {
    myRow = mySheet.createRow(rowNum++);
    myRow.createCell(0).setCellValue(studentBean.getId());
    myRow.createCell(1).setCellValue(studentBean.getName());
   }
  } catch (Exception e) {
   e.printStackTrace();
  }

 }

 public String execute() {
  return SUCCESS;
 }

 public String getReportFile() {
  return reportFile;
 }

 public void setReportFile(String reportFile) {
  this.reportFile = reportFile;
 }

 public InputStream getInputStream() {
  return inputStream;
 }

 public void setInputStream(InputStream inputStream) {
  this.inputStream = inputStream;
 }

 public List getNameList() {
  return nameList;
 }

 public void setNameList(List nameList) {
  this.nameList = nameList;
 }

}

index.jsp

<%response.sendRedirect("fetchName.action");%> 

exporttoexcel.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>







  
  Export To Excel

While executing the project below output shown click on export link and dialog box shown where you save file :-

Derived Property , computed property @Formula annotation in Hibernate

A derived, or calculated property when we want the Database to do some computation for you rather than in the JVM, we can create some kind of virtual column. We can use a SQL formula instead of mapping a property into a column.This kind of property is read only calculated at run time ,or fetch time.

To configure the derived property we use the @Formula annotation or formula attribute in xml.

// perform calculations
    @Formula(value="msgQuantity*2")
 private int maxId;
 
     // call functions
     @Formula(value = "MOD(msgQuantity,2)")
 private int sqrt;

Sample Code :-

ChatMassage.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.javastoreroom.modal;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

import org.hibernate.annotations.Formula;

/**
 * 
 * @author Arun
 */
@Entity
@Table(name = "messages")
public class ChatMassage implements Serializable {

 /**
  * 
  */
 private static final long serialVersionUID = 1L;

 @Id
 @GeneratedValue(strategy = GenerationType.AUTO)
 @Column(name = "msg_id")
 private int msg_id;

 @Column(name = "message")
 private String message;

 @Column(name = "msgQuantity")
 private int quantity;

 @Formula(value = "MOD(msgQuantity,2)")
 private int sqrt;

 @Formula(value="msgQuantity*2")
 private int maxId;
 
 public int getMsg_id() {
  return msg_id;
 }

 public void setMsg_id(int msg_id) {
  this.msg_id = msg_id;
 }

 public String getMessage() {
  return message;
 }

 public void setMessage(String message) {
  this.message = message;
 }

 public int getQuantity() {
  return quantity;
 }

 public void setQuantity(int quantity) {
  this.quantity = quantity;
 }

 public int getSqrt() {
  return sqrt;
 }

 public void setSqrt(int sqrt) {
  this.sqrt = sqrt;
 }

 public int getMaxId() {
  return maxId;
 }

 public void setMaxId(int maxId) {
  this.maxId = maxId;
 }
 
}

Main.java

import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.Session;

import com.javastoreroom.hibernateutil.HibernateUtil;
import com.javastoreroom.modal.ChatMassage;

public class Main {

 public static void main(String[] args) {
  Session session = HibernateUtil.getSessionFactory().openSession();

  try {
   
       Criteria criteria = session.createCriteria(ChatMassage.class);
   if (criteria.list().size() > 0)
    viewMassage(criteria);

  } catch (HibernateException e) {
   e.printStackTrace();
  } finally {
   session.close();
  }
 }

 @SuppressWarnings("unchecked")
 private static void viewMassage(Criteria criteria) {
  List chatMassages = criteria.list();
 
  for (ChatMassage chatMassage : chatMassages){ 
   System.out.println(chatMassage.getMessage());
           System.out.println(chatMassage.getSqrt());
   System.out.println(chatMassage.getMaxId());
  }
 }

}

While execute code see below query :-

select
        this_.msg_id as msg1_0_0_,
        this_.message as message0_0_,
        this_.msgQuantity as msgQuant3_0_0_,
        this_.msgQuantity*2 as formula0_0_,
        MOD(this_.msgQuantity,
        2) as formula1_0_ 
    from
        messages this_

That's done :)

org.hibernate.HibernateException: No CurrentSessionContext configured!

Getting a No CurrentSessionContext configured! exception while changing a this line in hibernate :-

   Session session =  HibernateUtil.getSessionFactory().openSession();

to this :-

  Session session = HibernateUtil.getSessionFactory().getCurrentSession();

Reason behind this exception i am using HibernateUtil.getSessionFactory().openSession() always opens a new session that close once when done the operations.
Here i am write a HibernateUtil.getSessionFactory().getCurrentSession() so this returns a session bound to a context , currently running thread so here i am not bind this session to context so exception throw . We don't need to close this session.

org.hibernate.HibernateException: No CurrentSessionContext configured!
 at org.hibernate.impl.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:542)
 at com.javastoreroom.dao.DAOImpl.fetchInfo(DAOImpl.java:28)
 at com.javastoreroom.action.DashboardAction.ChildDetails(DashboardAction.java:220)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:404)
 at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:267)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:229)
 at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:221)
 at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:88)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:123)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:184)
 at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:105)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:115)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:143)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:123)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:170)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:207)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.gwtech.crm.interceptor.SessionInterceptor.intercept(SessionInterceptor.java:31)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:221)
 at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:150)
 at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:48)
 at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:123)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:184)
 at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:105)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:83)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:207)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:74)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:127)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:107)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:206)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:115)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:143)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:121)
 at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:170)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:123)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
 at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
 at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
 at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
 at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:50)
 at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:504)
 at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:419)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
 at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)
 at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
 at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
 at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
 at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1008)
 at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
 at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
 at java.lang.Thread.run(Thread.java:695)

Spring Framework 4.0 available

Source :- Spring Framework 4.0 RC1 available

Spring Framework 4.0 works beautifully with Java 8 and also allows applications to be written partially or entirely in Groovy, a concise dynamic language on the JVM. Spring Framework 4.0 also provides the foundation for new advances in the Spring IO platform such as Spring Boot. Spring Boot nearly eliminates initial configuration work altogether.

This release completes our 4.0 feature set with several new features since M3:

1. full compatibility with recent OpenJDK 8 Developer Preview builds.
2. first-class support for Groovy-based bean definitions (as known from Grails).
3. autowiring based on generic types (e.g. MyRepository).
4. using Objenesis to create CGLIB proxy instances (allowing for constructor injection).
5. the introduction of a ScriptEvaluator mechanism (including JSR-223 support).
6. time zone resolution in Spring MVC (connected to JSR-310 and Joda-Time).
7. finer-grained configuration options for Spring MVC's @ControllerAdvice.
8. the introduction of MvcUriComponentsBuilder (inspired by Spring HATEOAS).
9. and last but not least, a lot of fine-tuning in Spring's new WebSocket support.

HttpSessionListener , HttpSessionAttributeListener , ServletContextListener in java example

1. HttpSessionListener :- This interface may are notified of changes to the list of active sessions in a web application. To receive notification events, implementation class must be configured in the deployment descriptor (web.xml) for the web application. HttpSessionListener is used to keep track the the active session. When a new user login session created & add 1 in counter when invalidate logout minus 1 in counter.

create a web application with user login & user logout feature where you can see how this will be work.

implementing HttpSessionListener interface invoked at two method:-

1. public void sessionCreated(HttpSessionEvent httpSessionEvent)
    //Receives notification that a session has been created. LOGIN
    //Parameters: httpSessionEvent- containing the session.

2. public void sessionDestroyed(HttpSessionEvent httpSessionEvent)
   //Receives notification that a session is invalidated. LOGOUT
   //Parameters:httpSessionEvent - containing the session.

Sample Code :-

package com.javastoreroom.listener;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;

import org.apache.log4j.Logger;

public class SessionListener implements HttpSessionListener {
 private static final Logger LOGGER = Logger.getLogger(SessionListener.class);
 private static int  activeSessionCounter;
 
 public static int getActiveSessionCounter() {
  return activeSessionCounter;
 }

 public static void setActiveSessionCounter(int activeSessionCounter) {
  SessionListener.activeSessionCounter = activeSessionCounter;
 }

 public void sessionCreated(HttpSessionEvent arg0) {
  activeSessionCounter++;
  LOGGER.info("session created ------ one add into counter -------> :"+activeSessionCounter);

 }

 public void sessionDestroyed(HttpSessionEvent arg0) {
  activeSessionCounter--;
  LOGGER.info("session destroy ----- remove one into counter -----> :"+activeSessionCounter);

 }

}

As we write above "implementation class must be configured in the deployment descriptor (web.xml)"

  com.javastoreroom.listener.SessionListener
 

now when you run your web application you can see in log :-
while user login :-session created ------ one add into counter -------> :1
While user Logout:-session destroy ----- remove one into counter -----> :0

2. HttpSessionAttributeListener:- This interface receiving notification events about HttpSession attribute changes.To receive these notification events, the implementation class must be either declared in the deployment descriptor or annotated with WebListener.HttpSessionAttributeListener is used to keep monitor session attribute. When a new user login session created & put username , id some other attribute in session to access globally in application. Using this interface we can check when attribute add , update and remove from session.

implementing HttpSessionAttributeListener interface invoked at three method:-

1. public void attributeAdded(HttpSessionBindingEvent bindingEvent)
    //Receives notification that an attribute has been added to a session. LOGIN & set USERNAME IN SESSION
    //Parameters:bindingEvent- containing the session and the name and value of the attribute that was added

2. public void attributeRemoved(HttpSessionBindingEvent bindingEvent)
    //Receives notification that an attribute has been removed from a session.
    //Parameters:bindingEvent-containing the session and the name and value of the attribute that was removed

3. public void attributeReplaced(HttpSessionBindingEvent bindingEvent)
    //Receives notification that an attribute has been replaced in a session.
    //Parameters:bindingEvent- containing the session and the name and (old) value of replaced with new one.

Sample Code:-

package com.javastoreroom.listener;

import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionBindingEvent;
import org.apache.log4j.Logger;

public class SessionAttributeListener implements HttpSessionAttributeListener {
 public static final Logger LOGGER = Logger.getLogger(SessionAttributeListener.class);

 public void attributeAdded(HttpSessionBindingEvent bindingEvent) {
  String attributeName = bindingEvent.getName();
  Object object = bindingEvent.getValue();
              LOGGER.info("attribute added in session -->" + attributeName + "&"+ object);
 }

 public void attributeRemoved(HttpSessionBindingEvent bindingEvent) {
  String attributeName=bindingEvent.getName();
  Object object=bindingEvent.getValue();
  LOGGER.info("attribute removed in session -->" + attributeName + "&"+ object);

 }

 public void attributeReplaced(HttpSessionBindingEvent bindingEvent) {
  String attributeName=bindingEvent.getName();
  Object object=bindingEvent.getValue();
  LOGGER.info("attribute replace in session -->" + attributeName + "&"+ object);
 }
}

"implementation class must be configured in the deployment descriptor (web.xml)"

  com.javastoreroom.listener.SessionAttributeListener
 

3.ServletContextListener:-This interface receive notifications about changes to the servlet context of the web application they are part of. To receive notification events, the implementation class must be configured in the deployment descriptor for the web application.If you want to run your code before the web application is start.Here you want to start sending notification when application start either user login or not.

implementing ServletContextListenerinterface invoked at two method:-

1. public void contextInitialized(ServletContextEvent servletContextEvent)
    //Notification that the web application initialization process is starting. All ServletContextListeners are notified of context initialization before any filter or servlet in the web application is initialized.

2. public void contextDestroyed(ServletContextEvent servletContextEvent)
    //Notification that the servlet context is about to be shut down. All servlets and filters have been destroy()ed before any //ServletContextListeners are notified of context destruction. 

Sample Code:-

package com.javastoreroom.listener;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionBindingEvent;

import org.apache.log4j.Logger;

public class applicationListener implements ServletContextListener {
 public static final Logger LOGGER = Logger.getLogger(SessionAttributeListener.class);

 @Override
 public void contextDestroyed(ServletContextEvent arg0) {
  LOGGER.info("context destory when stop ");
  
 }

 @Override
 public void contextInitialized(ServletContextEvent arg0) {
  LOGGER.info("context started before aplication started ");
  
 }
}

When you start a tomcat server see log "context started before aplication started" line will be shown before application start.

:) Enjoy JAVA Love it