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Cannot invoke "" because "" is null

i finally find it question tab.
why this error is 'boom'?????
i didn't understand spend two days.....
**java.lang.NullPointerException: Cannot invoke
"com.board.dao.BoardDao.listboard(com.board.dto.BoardDto)" because "this.bDao" is null**
at com.board.service.BoardService.listboard(BoardService.java:19)
at com.board.controller.BoardController.boardlist(BoardController.java:25)
at com.board.controller.BoardController.boardlist(BoardController.java:26)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:626)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:543)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:616)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:818)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1626)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Unknown Source)
controller
#Controller
public class BoardController {
#Autowired
BoardService service;
#RequestMapping("/board")
public ModelAndView boardlist (ModelAndView mv ,BoardDto dto) {
System.out.println("boardlist ");
System.out.println(dto+"dto");
List<BoardDto> dtolist = service.listboard(dto);
mv.addObject("boardlist", dtolist);
mv.setViewName("boardlist");
return mv;
}
}
controller is fine.. i think..
service
#Service
public class BoardService {
#Autowired
BoardDao bDao;
public List<BoardDto> listboard(BoardDto dto) {
System.out.println("boardservice");
List<BoardDto> result = bDao.listboard(dto);
return result ;
}
}
this position is error why?? T.T
i think this method is error position but i don't know understand. why???
dao
public class BoardDao extends SqlSessionDaoSupport{
#Autowired
SqlSessionTemplate session;
public List<BoardDto> listboard(BoardDto dto) {
System.out.println("dao.");
List<BoardDto> result = session.selectList("boarddate.listboard", dto);
return result;
}
}
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">
<!-- Root Context: defines shared resources visible to all other web components -->
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>
<property name="url" value="jdbc:oracle:thin:#localhost:1521:orcl"/>
<property name="username" value="board"/>
<property name="password" value="1234"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- classpath: -> src/main/resources -->
<property name="configLocation" value="classpath:myBatis/myBatis-config.xml"/>
</bean>
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
<!-- DI -->
<bean class="com.board.service.BoardService"></bean>
<bean class="com.board.dao.BoardDao">
<property name="sqlSessionTemplate" ref="sqlSession"/>
</bean>
</beans>
root-context.xml
why error is 'boom'? i didn't understand.... T.T
--> edit more infomation to error

I think your problem is related with the lack of a #Component annotation in your BoardDao class.
The component should have a #Component annotation to instantiate the singleton to be injected in your Service Layer.
#Component
public class BoardDao extends SqlSessionDaoSupport{
#Autowired
SqlSessionTemplate session;
public List<BoardDto> listboard(BoardDto dto) {
System.out.println("dao.");
List<BoardDto> result = session.selectList("boarddate.listboard", dto);
return result;
}
}
If the problem persist, you may try with the #Repository annotation. Sadly I haven't used the class SqlSessionDaoSupport, so I don't know exactly the best annotation for that.

In my case it was with a Map, I wanted to increase its value, but this initial one will not exist, therefore it is null.
map.put(0, map.get(0) 1);
It was fixed by adding a validation, like so:
map.put(0, map.get(0) != null ? map.get(0) + 1 : 1);

Spring MVC Service class NullPointerException [closed]

Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 7 years ago.
Improve this question
I am trring to create an application where I am getting a problem. Here is the code
HomeController.java
#Controller
public class HomeController {
private EmployeeService employeeService;
#Autowired(required=true)
#Qualifier(value="employeeService")
public void setEmployeeService(EmployeeService employeeService)
{
this.employeeService = employeeService;
}
#RequestMapping("/index")
public ModelAndView indexWorld(#ModelAttribute("loginForm") Employee employee, ModelMap model) {
return new ModelAndView("index", "welcomeMessage","Hello Guest! welcome to our site");
}
#RequestMapping("/login")
public ModelAndView loginWorld(#ModelAttribute("loginForm") Employee employee, ModelMap model){
String result="", returnPage="";
if(this.employeeService.validateLogin(employee.getUsername(), employee.getPassword())){
result = "Welcome " + employee.getUsername();
returnPage = "home";
}
else{
result = "<BR>Login Failure";
returnPage = "index";
}
model.addAttribute("result", result);
return new ModelAndView(returnPage, model);
}
}
EmployeeServiceImpl.java
#Service
public class EmployeeServiceImpl implements EmployeeService {
/* (non-Javadoc)
* #see com.smart.service.EmployeeService#validateLogin(java.lang.String, java.lang.String)
*/
EmployeeDAO employeeDAO;
public void setEmployeeDAO(EmployeeDAO employeeDAO)
{
this.employeeDAO = employeeDAO;
}
#Override
public boolean validateLogin(String username, String password) {
// TODO Auto-generated method stub
return this.employeeDAO.validateLogin(username, password);
}
}
EmployeeDAOImpl.java
#Transactional(value="myTransactionManager")
public class EmployeeDaoImpl implements EmployeeDAO {
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory)
{
this.sessionFactory = sessionFactory;
}
#Override
public boolean validateLogin(String username, String password) {
return (long)this.sessionFactory.getCurrentSession().createQuery("SELECT COUNT(*) FROM EmployeeInfo WHERE username = :username AND password = :password")
.setString("username", username)
.setString("password", password).uniqueResult() > 0;
}
}
welcome-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd"
xmlns:mvc="http://www.springframework.org/schema/mvc">
<context:annotation-config />
<context:component-scan base-package="com.smart" />
<mvc:annotation-driven />
<tx:annotation-driven transaction-manager="myTransactionManager" />
<bean id="employeeService" class="com.smart.service.EmployeeServiceImpl"></bean>
<bean id="employeeDAO" class="com.smart.dao.EmployeeDaoImpl"></bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/view/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation">
<value>classpath:hibernate.cfg.xml</value>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${jdbc.dialect}</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource"
p:driverClassName="oracle.jdbc.OracleDriver"
p:url="jdbc:oracle:thin:#localhost:1521:IMS"
p:username="username"
p:password="password" />
<mvc:resources mapping="/resources/**" location="/resources/theme1/" />
</beans>
Error
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:979)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:869)
javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
root cause
java.lang.NullPointerException
com.smart.service.EmployeeServiceImpl.validateLogin(EmployeeServiceImpl.java:32)
com.smart.controller.HomeController.loginWorld(HomeController.java:38)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:869)
javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
I am getting in EmployeeServiceImpl.java on this line
return this.employeeDAO.validateLogin(username, password);
It seems I am getting null from validateLogin function although I am return value from validateLogin function. Why I am getting null?
EDIT
Now error
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'myTransactionManager' is defined: No matching PlatformTransactionManager bean found for qualifier 'myTransactionManager' - neither qualifier match nor bean name match!
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:979)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:869)
javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
root cause
org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'myTransactionManager' is defined: No matching PlatformTransactionManager bean found for qualifier 'myTransactionManager' - neither qualifier match nor bean name match!
org.springframework.beans.factory.annotation.BeanFactoryAnnotationUtils.qualifiedBeanOfType(BeanFactoryAnnotationUtils.java:100)
org.springframework.beans.factory.annotation.BeanFactoryAnnotationUtils.qualifiedBeanOfType(BeanFactoryAnnotationUtils.java:56)
org.springframework.transaction.interceptor.TransactionAspectSupport.determineQualifiedTransactionManager(TransactionAspectSupport.java:377)
org.springframework.transaction.interceptor.TransactionAspectSupport.determineTransactionManager(TransactionAspectSupport.java:358)
org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:271)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
com.sun.proxy.$Proxy37.validateLogin(Unknown Source)
com.smart.service.EmployeeServiceImpl.validateLogin(EmployeeServiceImpl.java:33)
com.smart.controller.HomeController.loginWorld(HomeController.java:38)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:869)
javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

It seems EmployeeDAO is not being injected in EmployeeServiceImpl, wire EmployeeDAO using #Autowire or #Inject, Second EmployeeDAOImpl has not been declared a component (not sure if you have declared already in xml) so declare it with #Repository and also #Autowire SessionFactory. Hope this will do..

From the stacktrace it appears your code never calls validateLogin on the dao. The dao is null because there's nothing telling Spring to wire your DAO into your service. Add an #Autowired annotation to the setter in the service for the dao, similar to what you have in the controller wiring the service into it.

Spring-hibernate Data Insert

I'm trying to insert Data into table using HibernateTemplate but so far no luck.
here is code -
Catch
else
java.lang.NullPointerException
at com.imall.service.registrationService.regUser(registrationService.java:29)
at com.imall.web.LoginController.registerUser(LoginController.java:54)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:710)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:167)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:414)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:402)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:563)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:644)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:516)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1086)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:659)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1558)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1515)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
And Here is applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="dataSourceBean" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"> </property>
<property name="url" value="jdbc:mysql://localhost/test"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>
</bean>
<bean id="sessionFactoryBean" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSourceBean"></property>
<property name="mappingResources">
<list>
<value>com/imall/pojo/User.hbm.xml</value>
<value>com/imall/pojo/regUser.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<bean id="hibernateTemplateBean" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory" ref="sessionFactoryBean"></property>
</bean>
<bean id="authenticateServiceBean" class="com.imall.service.AuthticateService">
<property name="hibernateTemplate" ref="hibernateTemplateBean"> </property>
</bean>
<bean id="registrationServiceBean" class="com.imall.service.registrationService">
<property name="hibernateTemplate" ref="hibernateTemplateBean"> </property>
</bean>
</beans>
Here is the Service Method-
public class registrationService {
private HibernateTemplate hibernateTemplate;
public registrationService()
{
}
public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
this.hibernateTemplate = hibernateTemplate;
}
public boolean regUser(com.imall.pojo.regUser rgUser)
{
System.out.println(rgUser.getfName());
try
{
System.out.println("in try--"+rgUser.getEmailId());
hibernateTemplate.save(rgUser);
return true;
}
catch(Exception e)
{
System.out.println("Catch");
e.printStackTrace();
return false;
}
}
Any help will be appreciated.
Here are the other code -
LoginController Method-
#Autowired
private registrationService regService;
#RequestMapping(value="/register.php",method = RequestMethod.POST)
public ModelAndView registerUser(#ModelAttribute("regDetails") regUser userReg)
{
System.out.println(userReg.getfName());
if(regService.regUser(userReg))
{
System.out.println("IF");
return new ModelAndView("success");
}
else
{
System.out.println("else");
return new ModelAndView("success");
}
}
The line 29 in RegistrationService is- hibernateTemplate.save(rgUser);
And this line System.out.println(rgUser.getfName()); is printing the name.

Spring Hibernate - NullPointerException SessionFactory

I got an error about SessionFactory.
CrudController.java
#Controller
public class CrudController {
#Autowired
private AlbumBo albumBo;
#RequestMapping(value = "/addAlbum")
#ResponseBody
public void addAlbum(
#RequestParam("NameRecordCompany") String nameRecordCompany,
#RequestParam("NameAlbum") String nameAlbum,
#RequestParam("YearName") String yearAlbum,
#RequestParam("NameArtist") String nameArtist,
#RequestParam("NameCategory") String nameCategory,
#RequestParam("SongList") String songList) throws JSONException {
Song temp = new Song();
ArrayList<Song> listaCanzoni = new ArrayList();
String songs = "{" + "\"songs\":" + songList + "}";
JSONObject jsonObjectSongList = new JSONObject(songs);
JSONArray jsonArraySongList = (JSONArray) jsonObjectSongList.get("songs");
for (int i = 0; i < jsonArraySongList.length(); i++) {
temp.setName((String) jsonArraySongList.getJSONObject(i).get("songName"));
temp.setDuration((String) jsonArraySongList.getJSONObject(i).get("songDuration"));
listaCanzoni.add(new Song(temp.getName(), temp.getDuration()));
}
Artist artist = new Artist(nameArtist);
Category category = new Category(nameCategory);
Album album = new Album(nameAlbum, yearAlbum);
album.setArtist(artist);
album.setCategory(category);
try {
albumBo.save(album); //line 67
JOptionPane.showMessageDialog(null, "albumDao.save(album) eseguita");
} catch(Exception ex) {
ex.printStackTrace();
}
}
}
AlbumDaoImpl.java
public class AlbumDaoImpl implements AlbumDao {
#Autowired
SessionFactory sessionFactory;
public SessionFactory getSessionFactory() {
return sessionFactory;
}
public void setSessionFactory(SessionFactory factory) {
this.sessionFactory = factory;
}
#Override
public void save(Album album) throws Exception {
Session session = sessionFactory.openSession(); //line 38
Transaction tx = null;
try {
tx = session.beginTransaction();
session.saveOrUpdate(album);
tx.commit();
} catch (HibernateException e) {
if (tx != null) {
tx.rollback();
} else {
e.printStackTrace();
}
} finally {
session.close();
}
}
}
AlbumBoImpl.java
public class AlbumBoImpl implements AlbumBo{
private AlbumDao albumDao;
static final Logger logger = Logger.getLogger(AlbumBoImpl.class);
public AlbumDao getAlbumDao() {
return albumDao;
}
public void setAlbumDao(AlbumDao albumDao) {
this.albumDao = albumDao;
}
#Override
public void save(Album album) throws Exception {
try{
albumDao.save(album); //line 35
}catch(Exception e){
logger.error(e);
throw e;
}
}
}
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource"
p:driverClassName="${jdbc.driverClassName}"
p:url="${jdbc.url}"
p:username="${jdbc.username}"
p:password="${jdbc.password}"/>
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
p:location="/WEB-INF/jdbc.properties" />
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>it.davidefruci.casadiscografica2.beans.Album</value>
<value>it.davidefruci.casadiscografica2.beans.Artist</value>
<value>it.davidefruci.casadiscografica2.beans.Song</value>
<value>it.davidefruci.casadiscografica2.beans.RecordCompany</value>
<value>it.davidefruci.casadiscografica2.beans.Category</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="dataSource" ref="dataSource" />
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<!-- DAO -->
<bean id="albumDao" class="it.davidefruci.casadiscografica2.daoImpl.AlbumDaoImpl"/>
<bean id="artistDao" class="it.davidefruci.casadiscografica2.daoImpl.ArtistDaoImpl"/>
<bean id="categoryDao" class="it.davidefruci.casadiscografica2.daoImpl.CategoryDaoImpl"/>
<bean id="recordCompanyDao" class="it.davidefruci.casadiscografica2.daoImpl.RecordCompanyDaoImpl"/>
<bean id="songDao" class="it.davidefruci.casadiscografica2.daoImpl.SongDaoImpl"/>
<!-- BO -->
<bean id="albumBo" class="it.davidefruci.casadiscografica2.boImpl.AlbumBoImpl">
<property name="albumDao" ref="albumDao"></property>
</bean>
<bean id="artistBo" class="it.davidefruci.casadiscografica2.boImpl.ArtistBoImpl">
<property name="artistDao" ref="artistDao"></property>
</bean>
<bean id="categoryBo" class="it.davidefruci.casadiscografica2.boImpl.CategoryBoImpl">
<property name="categoryDao" ref="categoryDao"></property>
</bean>
<bean id="recordCompanyBo" class="it.davidefruci.casadiscografica2.boImpl.RecordCompanyBoImpl">
<property name="recordCompanyDao" ref="recordCompanyDao"></property>
</bean>
<bean id="songBo" class="it.davidefruci.casadiscografica2.boImpl.SongBoImpl">
<property name="songDao" ref="songDao"></property>
</bean>
I have a JSP where I add the datas that I want to save into my db.
When I click on the submit button, an Ajax call is invoked. This call invokes the CrudController, who should save data on my db with addAlbum method.
When the CrudController is invoked Tomcat tells me:
java.lang.NullPointerException
at it.davidefruci.casadiscografica2.daoImpl.AlbumDaoImpl.save(AlbumDaoImpl.java:38)
at it.davidefruci.casadiscografica2.boImpl.AlbumBoImpl.save(AlbumBoImpl.java:35)
at it.davidefruci.casadiscografica2.controllers.CrudController.addAlbum(CrudController.java:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:617)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1521)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1478)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
I wrong something with the sessionFactory initialization?

<bean id="personDao"class="com.studytrails.tutorials.springhibernatesessionfactory.PersonDao">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
You will need to inject session factory in DAO you are using which will help you do CRUD operations on your Object either you can configure this in XML or using annotation.
Also please help your self by going through the given like below
Example of spring hibernate integration

Two things you can do, one is change to inject the SessionFactory to Dao by yourself.
<!-- DAO -->
<bean id="albumDao" class="it.davidefruci.casadiscografica2.daoImpl.AlbumDaoImpl">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
You can do this for all DAOs.
Or
put a component scan on the applicationContext.xml XML configuration so that the SessionFactory will get Autowired.
<context:component-scan base-package="it.davidefruci.casadiscografica2"/>

spring xml based configuration from java based configuration

I am doing sample chat application using spring mvc and redis server by following steps from
http://blog.springsource.org/2012/05/16/spring-mvc-3-2-preview-chat-sample/
the example given there is by spring java based configurations. I want to do with xml based configurations. But it is not working for me.
I am getting the issues by converting following configuration class
package org.springframework.samples.async.config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.listener.PatternTopic;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
import org.springframework.samples.async.chat.ChatController;
#Configuration
#PropertySource("classpath:redis.properties")
public class RootConfig {
#Autowired
Environment env;
#Autowired
ChatController chatController;
#Bean
public RedisConnectionFactory redisConnectionFactory() {
JedisConnectionFactory cf = new JedisConnectionFactory();
cf.setHostName(this.env.getProperty("redis.host"));
cf.setPort(this.env.getProperty("redis.port", int.class));
cf.setPassword(this.env.getProperty("redis.password"));
return cf;
}
#Bean
public StringRedisTemplate redisTemplate() {
return new StringRedisTemplate(redisConnectionFactory());
}
#Bean
public RedisMessageListenerContainer redisMessageListenerContainer() {
RedisMessageListenerContainer mlc = new RedisMessageListenerContainer();
mlc.setConnectionFactory(redisConnectionFactory());
mlc.addMessageListener(this.chatController , new PatternTopic("chat"));
return mlc;
}
}
The following is the Xml based configuration i am trying to use instead of above java based configuration.
<bean id="redisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
p:host-name="localhost" p:port="9994" p:password=""/>
<bean id="messageListener" class="org.springframework.data.redis.listener.adapter.MessageListenerAdapter">
<constructor-arg>
<bean class="org.springframework.samples.async.chat.ChatController"/>
</constructor-arg>
</bean>
<bean id="redisMessageListenerContainer" class="org.springframework.data.redis.listener.RedisMessageListenerContainer">
<property name="connectionFactory" ref="redisConnectionFactory"/>
<property name="messageListeners">s
<map>
<entry key-ref="messageListener">
<bean class="org.springframework.data.redis.listener.PatternTopic">
<constructor-arg value="chat"/>
</bean>
</entry>
</map>
</property>
</bean>
The exception i am getting is
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'messageListener' defined in ServletContext resource [/WEB-INF/spring/mvc-config.xml]: Cannot create inner bean 'org.springframework.samples.async.chat.ChatController#74b70648' of type [org.springframework.samples.async.chat.ChatController] while setting constructor argument; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframework.samples.async.chat.ChatController] for bean with name 'org.springframework.samples.async.chat.ChatController#74b70648' defined in ServletContext resource [/WEB-INF/spring/mvc-config.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.samples.async.chat.ChatController
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:282)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:121)
at org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments(ConstructorResolver.java:629)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:148)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1049)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:953)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:490)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:626)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:652)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:600)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:666)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:519)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:460)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
at javax.servlet.GenericServlet.init(GenericServlet.java:160)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1280)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1193)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:865)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:136)
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:936)
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:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at jav
a.lang.Thread.run(Thread.java:662)
ChatController.java
package org.springframework.samples.async.chat;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.connection.Message;
import org.springframework.data.redis.connection.MessageListener;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.context.request.async.DeferredResult;
#Controller
#RequestMapping("/mvc/chat")
public class ChatController implements MessageListener {
private final Map<DeferredResult<List<String>>, Integer> chatRequests =
new ConcurrentHashMap<DeferredResult<List<String>>, Integer>();
private final ChatRepository chatRepository;
#Autowired
public ChatController(ChatRepository chatRepository) {
this.chatRepository = chatRepository;
}
#RequestMapping(method=RequestMethod.GET, produces="application/json")
#ResponseBody
public DeferredResult<List<String>> getMessages(#RequestParam int messageIndex) {
final DeferredResult<List<String>> deferredResult = new DeferredResult<List<String>>(null, Collections.emptyList());
this.chatRequests.put(deferredResult, messageIndex);
deferredResult.onCompletion(new Runnable() {
#Override
public void run() {
chatRequests.remove(deferredResult);
}
});
List<String> messages = this.chatRepository.getMessages(messageIndex);
if (!messages.isEmpty()) {
deferredResult.setResult(messages);
}
return deferredResult;
}
#RequestMapping(method=RequestMethod.POST)
#ResponseBody
public void postMessage(#RequestParam String message) {
this.chatRepository.addMessage(message);
}
// Redis MessageListener contract
#Override
public void onMessage(Message message, byte[] pattern) {
for (Entry<DeferredResult<List<String>>, Integer> entry : this.chatRequests.entrySet()) {
List<String> messages = this.chatRepository.getMessages(entry.getValue());
entry.getKey().setResult(messages);
}
}
}
The complete mvc-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<mvc:annotation-driven>
<mvc:async-support default-timeout="30000" />
</mvc:annotation-driven>
<mvc:view-controller path="/" view-name="chat"/>
<mvc:resources mapping="/resources/**" location="resources"/>
<context:component-scan base-package="org.springframework.samples.async.chat" />
<bean id="templateResolver" class="org.thymeleaf.templateresolver.ServletContextTemplateResolver">
<property name="prefix" value="/WEB-INF/templates/" />
<property name="suffix" value=".html" />
<property name="templateMode" value="HTML5" />
<property name="cacheable" value="true" />
</bean>
<bean id="templateEngine" class="org.thymeleaf.spring3.SpringTemplateEngine">
<property name="templateResolver" ref="templateResolver" />
</bean>
<bean id="viewResolver" class="org.thymeleaf.spring3.view.ThymeleafViewResolver">
<property name="templateEngine" ref="templateEngine" />
<property name="order" value="1" />
<property name="viewNames" value="*.html"/>
</bean>
<bean id="stringRedisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate"
p:connection-factory-ref="redisConnectionFactory"/>
<bean id="redisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
p:host-name="localhost" p:port="9994" p:password=""/>
<bean id="messageListener" class="org.springframework.data.redis.listener.adapter.MessageListenerAdapter">
<constructor-arg>
<bean class="org.springframework.samples.async.chat.ChatController"/>
</constructor-arg>
</bean>
<bean id="redisMessageListenerContainer" class="org.springframework.data.redis.listener.RedisMessageListenerContainer">
<property name="connectionFactory" ref="redisConnectionFactory"/>
<property name="messageListeners">
<!-- map of listeners and their associated topics (channels or/and patterns) -->
<map>
<entry key-ref="messageListener">
<bean class="org.springframework.data.redis.listener.PatternTopic">
<constructor-arg value="chat"/>
</bean>
</entry>
</map>
</property>
</bean>
</beans>
Please help me out.

I think the issue is that you are trying to do some sort of autowire by class thing in your xml with this portion (I am assuming):
<bean id="messageListener" class="org.springframework.data.redis.listener.adapter.MessageListenerAdapter">
<constructor-arg>
<bean class="org.springframework.samples.async.chat.ChatController"/>
</constructor-arg>
</bean>
But that is not how the xml configuration works. What the xml is doing here is trying to create a new instance of the ChatController and use it as a constructor argument to the MessageListenerAdapter. Obviously this doesn't work because your ChatController has no 0 arg constructors. What you want to do instead is reference your existing ChatController (which is marked as an #Controller and will therefore be automatically picked up by your component-scan) in the constructor argument. Something like this:
<bean id="messageListener" class="org.springframework.data.redis.listener.adapter.MessageListenerAdapter">
<constructor-arg>
<ref bean="chatController"/>
</constructor-arg>
</bean>
The bean being referenced by 'chatController' is your component-scanned ChatController (it is the default bean name when none is provided via the stereotype annotations or the #Qualifier annotation).