Spring Login problem "Request processing failed; nested exception is java.lang.NullPointerException"

[Deepaks Deshpande]

Dear Ranchers,

I am creating a login application using spring mvc and ibatis. But i am getting a NPE and i am not able to solve this issue from the past 2 days . Please help me.

My Form controller is

@SuppressWarnings("deprecation")
public class LoginFormController extends SimpleFormController {
	static final Logger logger = Logger.getLogger(LoginFormController.class);
	
	ApplicationContext ctx = new ClassPathXmlApplicationContext("ibatis-servlet.xml");
	
	public LoginFormController() {
		super();
		// TODO Auto-generated constructor stub
	}
		
	public ModelAndView onSubmit(HttpServletRequest request,
			HttpServletResponse response, Object command,
			BindException exception) {
		logger.info(":: LOADED THE ibatis-servlet.xml FILE FOR <...LoginFormController...> ::");
		
		boolean flag = false;
		HttpSession session = request.getSession();
		logger.info("::::: Setting the Users class as the command :::::");
		
		Users objUser = (Users) command;
		Users objUserLogin = (Users) command;
		
		String userIdFromForm = objUser.getUserId();
		String passwordFromForm = objUser.getPassword();
		
		logger.info(":: ENTERED USER IS :: "+objUser.getUserId());
		logger.info(":: ENTERED PASSWORD IS :: "+objUser.getPassword());
		
		UserService service = (UserService) ctx.getBean("userService");
		
		objUserLogin = service.validateUserLogin(userIdFromForm);
		
		if(userIdFromForm.equals(objUserLogin.getUserId()) && passwordFromForm.equals(objUserLogin.getPassword())) {
			flag = true;
			logger.info(":: LOGIN STATUS FLAG IS :: "+flag);
			session = request.getSession();
			String sessionStr = null;
			//sessionStr = (String) request.getAttribute("userId");
			logger.info("::::::: Request attribute before is ::::::::: "
					+ sessionStr);

			if (sessionStr == null) {
				session.setAttribute("userId", userIdFromForm);
				logger.info(":::::: Login succeeded :::::::");
				logger.info(":::::: Session value is ::::::"+session.getAttribute("userId"));
				logger.info(":::::: Session value after logging in is ::::::"
						+ session.getAttribute("userId"));
			}
			return new ModelAndView("home/home");
		}
		else {
			logger.info("Flag value is :::::::: " + flag);
			logger.info("::::: Entered user is :::::: " + userIdFromForm);
			logger.info("::::: Entered password is :::::: " + passwordFromForm);
			logger.info("::::: Login failed because of invalid user/password :::::");

			return new ModelAndView("login/loginindex");
		}
	}
}

My spring application context file is:

<?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-3.0.xsd">
	
<!-- Session value configurations -->
	<bean id="sessionValidityInterceptor" class="com.spring.mvc.utils.SessionValidityInterceptor" />
		
<!-- Controller Declarations -->
	<bean id="loginController" class="com.spring.mvc.controller.LoginController" />
	
	<bean id="homeController"
		class="org.springframework.web.servlet.mvc.ParameterizableViewController">
		<property name="viewName" value="home/home" />
	</bean>
	
<!-- FormController Declarations -->
	<bean id="loginFormController" class="com.spring.mvc.formcontroller.LoginFormController">
		<property name="sessionForm">
			<value>true</value>
		</property>
		<property name="commandName">
			<value>Users</value>
		</property>
		<property name="commandClass">
			<value>com.spring.mvc.domain.Users</value>
		</property>
		<property name="formView">
			<value>login/loginindex</value>
		</property>
		<property name="successView">
			<value>home/home</value>
		</property>
	</bean>

<!-- URL Handler Mappings -->
	<bean id="urlMappingLoginPage" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
		<property name="mappings">
			<props>
				<prop key="/loginindex.htm">loginController</prop>
				<prop key="/loggedin.htm">loginFormController</prop>
			</props>
		</property>
	</bean>
	
	<bean id="urlMappings" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
		<property name="mappings">
			<props>
				<prop key="/welcome.htm">homeController</prop>
			</props>
		</property>
	
	</bean>

<!-- View Resolver Configurations -->
	<bean id="viewResolver"
	class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
		<property name="prefix" value="/view/" />
		<property name="suffix" value=".jsp" />
	</bean>
</beans>

My ibatis configuration file is:

<?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">

	<!-- Properties file Location configurations -->
	<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="location" value="classpath:database.properties" />
	</bean>
	
	
	<!-- DataSource properties and their values mapping configurations -->
	<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName" value="${jdbc.driverClassName}" />
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />
 	</bean>
 	
 	<!-- iBATIS SQL Map configurations -->
 	<bean id="sqlMap" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
 		<property name="dataSource" ref="dataSource" />
 		<property name="configLocation" value="classpath:SqlMapConfig.xml" />
 	</bean>
 	
 	<!-- DAO Implementation bean configurations -->
 	<bean id="userService" class="com.spring.mvc.daoimpl.UserServiceImpl">
 		<property name="sqlMapClient" ref="sqlMap" />
 	</bean>
	
</beans>

and my SqlMapConfig file is:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sqlMapConfig PUBLIC "-//iBATIS.com//DTD SQL MAP Config 2.0//EN" 
"http://www.ibatis.com/dtd/sql-map-config-2.dtd">

<sqlMapConfig>
	<settings useStatementNamespaces="true" />
	
	<!-- SQL Map configurations -->
	<sqlMap resource="com/spring/mvc/sqlmaps/UserSqlMap.xml" />
</sqlMapConfig>

My console prints the following and i can make out the username is null so i am getting this NPE. But why does it print the password that the user entered and not the username? Can anybody please explain where i am going wrong?

2012-02-21 17:08:46,344 DEBUG [http-8080-2] - DispatcherServlet with name 'SpringMvcProject' processing POST request for [/SpringMvcProject/loggedin.htm]
2012-02-21 17:08:46,344 DEBUG [http-8080-2] - Mapping [/loggedin.htm] to handler 'com.spring.mvc.formcontroller.LoginFormController@9bc5f9'
2012-02-21 17:08:46,344  INFO [http-8080-2] - :: LOADED THE ibatis-servlet.xml FILE FOR <...LoginFormController...> ::
2012-02-21 17:08:46,345  INFO [http-8080-2] - ::::: Setting the Users class as the command :::::
[color=red]2012-02-21 17:08:46,345  INFO [http-8080-2] - :: ENTERED USER IS :: null
2012-02-21 17:08:46,345  INFO [http-8080-2] - :: ENTERED PASSWORD IS :: 123456[/color]
2012-02-21 17:08:46,345 DEBUG [http-8080-2] - Returning cached instance of singleton bean 'userService'
2012-02-21 17:08:46,345  INFO [http-8080-2] - :::: Executing query to validate user login ::::
2012-02-21 17:08:46,345 DEBUG [http-8080-2] - Opened SqlMapSession [com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl@1300800] for iBATIS operation
2012-02-21 17:08:46,345 DEBUG [http-8080-2] - {conn-100004} Connection
2012-02-21 17:08:46,345 DEBUG [http-8080-2] - Obtained JDBC Connection [Transaction-aware proxy for target Connection  from DataSource [org.springframework.jdbc.datasource.DriverManagerDataSource@35378d]] for iBATIS operation
2012-02-21 17:08:46,346 DEBUG [http-8080-2] - Cache 'users.usersCache': retrieved object 'SERIALIZABLE_NULL_OBJECT'
2012-02-21 17:08:46,346 DEBUG [http-8080-2] - Resolving exception from handler [com.spring.mvc.formcontroller.LoginFormController@9bc5f9]: java.lang.NullPointerException
2012-02-21 17:08:46,356 DEBUG [http-8080-2] - Resolving exception from handler [com.spring.mvc.formcontroller.LoginFormController@9bc5f9]: java.lang.NullPointerException
2012-02-21 17:08:46,357 DEBUG [http-8080-2] - Resolving exception from handler [com.spring.mvc.formcontroller.LoginFormController@9bc5f9]: java.lang.NullPointerException
2012-02-21 17:08:46,357 DEBUG [http-8080-2] - Could not complete request
java.lang.NullPointerException
	at com.spring.mvc.formcontroller.LoginFormController.onSubmit(LoginFormController.java:57)
	at org.springframework.web.servlet.mvc.SimpleFormController.processFormSubmission(SimpleFormController.java:272)
	at org.springframework.web.servlet.mvc.AbstractFormController.handleInvalidSubmit(AbstractFormController.java:675)
	at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:275)
	at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:774)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	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:291)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:662)
Feb 21, 2012 5:08:46 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet SpringMvcProject threw exception
java.lang.NullPointerException
	at com.spring.mvc.formcontroller.LoginFormController.onSubmit(LoginFormController.java:57)
	at org.springframework.web.servlet.mvc.SimpleFormController.processFormSubmission(SimpleFormController.java:272)
	at org.springframework.web.servlet.mvc.AbstractFormController.handleInvalidSubmit(AbstractFormController.java:675)
	at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:275)
	at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:774)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	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:291)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:662)

Please help me as i am stuck here and i don't have any idea as to why i am getting this error.Thank you

[Prasad Krishnegowda]

In your posted code, line 57 is blank, but the NPE occurs on line 57, can you post that line of code?

EDIT: Can you also post your command class and JSP file?

P:S: Still extending SimpleFormController in the spring3 era? I would suggest you to use annotations instead, which makes is more powerful and simpler.

[Deepaks Deshpande]

This project requires spring 2x as it has been developed using spring 2x. So please guide me to solve this problem. Thank you

[Deepaks Deshpande]

My command class is

public class Users {

	private String serviceNo;
	private String userId;
	private String name;
	private String password;
	private String email;
	private String typeOfUser;
	private Date dateOfCreation;
	private int rank;
	private int branch;
	private int userSection;
	private int unit;
	private int desgnation;
	private int baseStation;
	/**
	 * @return the serviceNo
	 */
	public String getServiceNo() {
		return serviceNo;
	}
	/**
	 * @param serviceNo the serviceNo to set
	 */
	public void setServiceNo(String serviceNo) {
		this.serviceNo = serviceNo;
	}
	/**
	 * @return the userId
	 */
	public String getUserId() {
		return userId;
	}
	/**
	 * @param userId the userId to set
	 */
	public void setUserId(String userId) {
		this.userId = userId;
	}
	/**
	 * @return the name
	 */
	public String getName() {
		return name;
	}
	/**
	 * @param name the name to set
	 */
	public void setName(String name) {
		this.name = name;
	}
	/**
	 * @return the password
	 */
	public String getPassword() {
		return password;
	}
	/**
	 * @param password the password to set
	 */
	public void setPassword(String password) {
		this.password = password;
	}
	/**
	 * @return the email
	 */
	public String getEmail() {
		return email;
	}
	/**
	 * @param email the email to set
	 */
	public void setEmail(String email) {
		this.email = email;
	}
	/**
	 * @return the typeOfUser
	 */
	public String getTypeOfUser() {
		return typeOfUser;
	}
	/**
	 * @param typeOfUser the typeOfUser to set
	 */
	public void setTypeOfUser(String typeOfUser) {
		this.typeOfUser = typeOfUser;
	}
	/**
	 * @return the dateOfCreation
	 */
	public Date getDateOfCreation() {
		return dateOfCreation;
	}
	/**
	 * @param dateOfCreation the dateOfCreation to set
	 */
	public void setDateOfCreation(Date dateOfCreation) {
		this.dateOfCreation = dateOfCreation;
	}
	/**
	 * @return the rank
	 */
	public int getRank() {
		return rank;
	}
	/**
	 * @param rank the rank to set
	 */
	public void setRank(int rank) {
		this.rank = rank;
	}
	/**
	 * @return the branch
	 */
	public int getBranch() {
		return branch;
	}
	/**
	 * @param branch the branch to set
	 */
	public void setBranch(int branch) {
		this.branch = branch;
	}
	/**
	 * @return the userSection
	 */
	public int getUserSection() {
		return userSection;
	}
	/**
	 * @param userSection the userSection to set
	 */
	public void setUserSection(int userSection) {
		this.userSection = userSection;
	}
	/**
	 * @return the unit
	 */
	public int getUnit() {
		return unit;
	}
	/**
	 * @param unit the unit to set
	 */
	public void setUnit(int unit) {
		this.unit = unit;
	}
	/**
	 * @return the desgnation
	 */
	public int getDesgnation() {
		return desgnation;
	}
	/**
	 * @param desgnation the desgnation to set
	 */
	public void setDesgnation(int desgnation) {
		this.desgnation = desgnation;
	}
	/**
	 * @return the baseStation
	 */
	public int getBaseStation() {
		return baseStation;
	}
	/**
	 * @param baseStation the baseStation to set
	 */
	public void setBaseStation(int baseStation) {
		this.baseStation = baseStation;
	}
	/* (non-Javadoc)
	 * @see java.lang.Object#toString()
	 */
	@Override
	public String toString() {
		return "Users [serviceNo=" + serviceNo + ", userId=" + userId
				+ ", name=" + name + ", password=" + password + ", email="
				+ email + ", typeOfUser=" + typeOfUser + ", dateOfCreation="
				+ dateOfCreation + ", rank=" + rank + ", branch=" + branch
				+ ", userSection=" + userSection + ", unit=" + unit
				+ ", desgnation=" + desgnation + ", baseStation=" + baseStation
				+ "]";
	}
	
}

The line 57 in LoginFormController class is

if(userIdFromForm.equals(objUserLogin.getUserId()) && passwordFromForm.equals(objUserLogin.getPassword()))

This is the message printed out on to the console

2012-02-21 18:52:30,696 DEBUG [http-8080-1] - DispatcherServlet with name 'SpringMvcProject' determining Last-Modified value for [/SpringMvcProject/loginindex.htm]
2012-02-21 18:52:30,705 DEBUG [http-8080-1] - Mapping [/loginindex.htm] to handler 'com.spring.mvc.controller.LoginController@11bfcbe'
2012-02-21 18:52:30,707 DEBUG [http-8080-1] - Last-Modified value for [/SpringMvcProject/loginindex.htm] is: -1
2012-02-21 18:52:30,714 DEBUG [http-8080-1] - DispatcherServlet with name 'SpringMvcProject' processing GET request for [/SpringMvcProject/loginindex.htm]
2012-02-21 18:52:30,717  INFO [http-8080-1] - :::: Loaded Login Page Successfully ::::
2012-02-21 18:52:30,720 DEBUG [http-8080-1] - Invoking afterPropertiesSet() on bean with name 'login/loginindex'
2012-02-21 18:52:30,720 DEBUG [http-8080-1] - Rendering view [org.springframework.web.servlet.view.JstlView: name 'login/loginindex'; URL [/view/login/loginindex.jsp]] in DispatcherServlet with name 'SpringMvcProject'
2012-02-21 18:52:30,732 DEBUG [http-8080-1] - Forwarding to resource [/view/login/loginindex.jsp] in InternalResourceView 'login/loginindex'
2012-02-21 18:52:30,747 DEBUG [http-8080-1] - Successfully completed request
2012-02-21 18:52:35,863 DEBUG [http-8080-1] - DispatcherServlet with name 'SpringMvcProject' processing POST request for [/SpringMvcProject/loggedin.htm]
2012-02-21 18:52:35,863 DEBUG [http-8080-1] - Mapping [/loggedin.htm] to handler 'com.spring.mvc.formcontroller.LoginFormController@46f764'
2012-02-21 18:52:35,886  INFO [http-8080-1] - :: LOADED THE ibatis-servlet.xml FILE FOR <...LoginFormController...> ::
2012-02-21 18:52:35,886  INFO [http-8080-1] - ::::: Setting the Users class as the command :::::
2012-02-21 18:52:35,886  INFO [http-8080-1] - :: ENTERED USER IS :: null
2012-02-21 18:52:35,886  INFO [http-8080-1] - :: ENTERED PASSWORD IS :: deepak
2012-02-21 18:52:35,886 DEBUG [http-8080-1] - Returning cached instance of singleton bean 'userService'
2012-02-21 18:52:35,886  INFO [http-8080-1] - :::: Executing query to validate user login ::::
2012-02-21 18:52:35,890 DEBUG [http-8080-1] - Opened SqlMapSession [com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl@2a2ae9] for iBATIS operation
2012-02-21 18:52:35,909 DEBUG [http-8080-1] - {conn-100000} Connection
2012-02-21 18:52:35,913 DEBUG [http-8080-1] - Obtained JDBC Connection [Transaction-aware proxy for target Connection  from DataSource [org.springframework.jdbc.datasource.DriverManagerDataSource@6dd8f1]] for iBATIS operation
2012-02-21 18:52:35,914 DEBUG [http-8080-1] - Cache 'users.usersCache': cache miss
2012-02-21 18:52:35,924 DEBUG [http-8080-1] - {conn-100000} Preparing Statement:    SELECT userid, password FROM public.users WHERE userid = ? AND password = ?  
2012-02-21 18:52:35,932 DEBUG [http-8080-1] - Fetching JDBC Connection from DataSource
2012-02-21 18:52:35,932 DEBUG [http-8080-1] - Creating new JDBC DriverManager Connection to [jdbc:postgresql://localhost:5432/lms]
2012-02-21 18:52:36,047 DEBUG [http-8080-1] - {pstm-100001} Executing Statement:    SELECT userid, password FROM public.users WHERE userid = ? AND password = ?  
2012-02-21 18:52:36,047 DEBUG [http-8080-1] - {pstm-100001} Parameters: [null, null]
2012-02-21 18:52:36,047 DEBUG [http-8080-1] - {pstm-100001} Types: [null, null]
2012-02-21 18:52:36,068 DEBUG [http-8080-1] - {rset-100002} ResultSet
2012-02-21 18:52:36,094 DEBUG [http-8080-1] - Cache 'users.usersCache': stored object 'SERIALIZABLE_NULL_OBJECT'
2012-02-21 18:52:36,095 DEBUG [http-8080-1] - Returning JDBC Connection to DataSource
2012-02-21 18:52:36,096 DEBUG [http-8080-1] - Resolving exception from handler [com.spring.mvc.formcontroller.LoginFormController@46f764]: java.lang.NullPointerException
2012-02-21 18:52:36,118 DEBUG [http-8080-1] - Resolving exception from handler [com.spring.mvc.formcontroller.LoginFormController@46f764]: java.lang.NullPointerException
2012-02-21 18:52:36,119 DEBUG [http-8080-1] - Resolving exception from handler [com.spring.mvc.formcontroller.LoginFormController@46f764]: java.lang.NullPointerException
2012-02-21 18:52:36,122 DEBUG [http-8080-1] - Could not complete request
java.lang.NullPointerException
	at com.spring.mvc.formcontroller.LoginFormController.onSubmit(LoginFormController.java:57)
	at org.springframework.web.servlet.mvc.SimpleFormController.processFormSubmission(SimpleFormController.java:272)
	at org.springframework.web.servlet.mvc.AbstractFormController.handleInvalidSubmit(AbstractFormController.java:675)
	at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:275)
	at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:774)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	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:291)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:662)
Feb 21, 2012 6:52:36 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet SpringMvcProject threw exception
java.lang.NullPointerException
	at com.spring.mvc.formcontroller.LoginFormController.onSubmit(LoginFormController.java:57)
	at org.springframework.web.servlet.mvc.SimpleFormController.processFormSubmission(SimpleFormController.java:272)
	at org.springframework.web.servlet.mvc.AbstractFormController.handleInvalidSubmit(AbstractFormController.java:675)
	at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:275)
	at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
	at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:774)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	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:291)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:662)

[Prasad Krishnegowda]

Please post your JSP also

[Deepaks Deshpande]

This is my login page code:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Welcome :: Login Page</title>
<link rel="stylesheet" type="text/css" href="./view/css/style.css">
</head>
<body leftmargin=0 topmargin=0 marginheight="0" marginwidth="0" bgcolor="#ffffff">
<br><br><br><br><br><br><br>
<form class="form" method="post" action="loggedin.htm">  
  
    <p class="name">  
        <label for="name">User name</label> 
        <input type="text" name="name" id="name" />   
    </p>  
  
    <p class="email">  
        <label for="password">Password</label>
        <input type="password" name="password" id="password" />  
    </p>  
  
    <p class="submit">  
        <input type="submit" value="Login" />     
        <a >Forgot password?</a> 
    </p>  
  
</form>
</body>
</html>

[Prasad Krishnegowda]

change this line <input type="text" name="name" id="name" />
to <input type="text" name="userId" id="userId" /> and you should get the user entered id, in the controlller, for spring to bind them, you should have same name in both command class as well as JSP.

EDIT: either you can do the above change, or have objUserLogin.getName in your controller instead of objUserLogin.getUserId() on line 57.

[Deepaks Deshpande]

Thank you very much. Its working now.

[Prasad Krishnegowda]

Deepaks Deshpande wrote:Thank you very much. Its working now.

Glad to hear, its working..
You are Welcome Brother..