Well the problem is that this is my first example with spring and hibernate
I have downloaded the example which should create a login application, now
as I said the table have an id a user name and a password.
Here is the line of the exception:
User usr = userService.getUser(username);
Here is the user service interface and class:
package service;
import dao.UserDaoImpl;
import po.User;
/**
*
* @author ABIS1
*/
public interface UserService {
void addUser(String userName, String password, int admin) throws
Exception;
User getUser(long userId);
User getUser(String userName);
void setUserDao(UserDaoImpl userDao);
}
---------------------
package service;
import po.User;
/**
*
* @author ABIS1
*/
public class UserServiceImp implements UserService {
private dao.UserDao userDao;
public void addUser(String userName, String password, int admin) throws
Exception{
po.User user = new User();
user.setName(userName);
user.setPassword(password);
try
{
userDao.save(user);
}
catch(Exception err)
{
throw err;
}
}
public User getUser(long userId)
{
return userDao.getUser(userId);
}
public void setUserDao(dao.UserDaoImpl userDao) {
this.userDao = userDao;
}
public User getUser(String userName) {
return this.userDao.getUser(userName);
}
}
-----------------------
And the user dao interface and implementation:
package dao;
import po.User;
/**
*
* @author ABIS1
*/
public interface UserDao {
void save(User user) throws Exception;
User getUser(long userId);
User getUser(String userName);
}
-------------
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package dao;
import po.*;
import dao.UserDao;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
/**
*
* @author ABIS1
*/
public class UserDaoImpl extends HibernateDaoSupport implements UserDao {
public void save(User user) throws Exception
{
try
{
getHibernateTemplate().save(user);
}
catch(Exception err)
{
throw err;
}
}
public User getUser(long userId)
{
return (User)getHibernateTemplate().get(User.class, userId);
}
public User getUser(String userName) {
return (User)getHibernateTemplate().find("from User as u where
u.name = ?", userName).get(0);
}
}
-----Original Message-----
From: Nils-Helge Garli Hegvik [mailto:nil...@gmail.com]
Sent: 19 August 2009 13:05
To: Struts Users Mailing List
Subject: Re: Hibernate3+Spring2.5+Struts2
java.lang.NullPointerException
at action.LoginAction.execute(LoginAction.java:31)
Looks like you have a NPE at line 31 in LoginAction. What line is
that? Which references could have been null?
Nils-H
On Wed, Aug 19, 2009 at 1:59 PM, Zied Bejaoui<bejaouiz...@hotmail.com>
wrote:
> Thanks for your help, I have fixed this problem by removing the admin
property from the mapping file, now I am having another error, the login
page display then as soon as I enter the login details I receive this
exception:
>
> java.lang.NullPointerException
> at action.LoginAction.execute(LoginAction.java:31)
> 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(DefaultActionIn
vocation.java:404)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActi
onInvocation.java:267)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:229)
> at
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(D
efaultWorkflowInterceptor.java:221)
> at
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(Method
FilterInterceptor.java:86)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(Validati
onInterceptor.java:150)
> at
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.do
Intercept(AnnotationValidationInterceptor.java:48)
> at
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(Method
FilterInterceptor.java:86)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(Con
versionErrorInterceptor.java:123)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(Parame
tersInterceptor.java:167)
> at
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(Method
FilterInterceptor.java:86)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(St
aticParametersInterceptor.java:105)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterce
ptor.java:83)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInt
erceptor.java:207)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDr
ivenInterceptor.java:74)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(S
copedModelDrivenInterceptor.java:127)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(Prof
ilingActivationInterceptor.java:107)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(Debu
ggingInterceptor.java:206)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingIn
terceptor.java:115)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nIntercepto
r.java:143)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareIn
terceptor.java:121)
> at
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(Method
FilterInterceptor.java:86)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletCon
figInterceptor.java:170)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasIntercep
tor.java:123)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(Ex
ceptionMappingInterceptor.java:176)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:224)
> at
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionI
nvocation.java:223)
> at
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack
.java:455)
> at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:221)
> at
org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:50)
> at
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:504)
> at
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.jav
a:419)
> at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:235)
> at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:206)
> at
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter
.java:390)
> at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:235)
> at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:206)
> at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:233)
> at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:175)
> at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128
)
> at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102
)
> at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:109)
> at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
> at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
> at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http
11Protocol.java:583)
> at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
> at java.lang.Thread.run(Thread.java:619)
> Here is my login Action:
>
> * @author ABIS1
> */
>
> public class LoginAction extends ActionSupport {
>
> private UserServiceImp userService;
> private String message;
> private String username;
> private String password;
> private ResourceBundleMessageSource messageSource;
>
> public LoginAction() {
> }
>
> �...@override
> public String execute() throws Exception {
> User usr = userService.getUser(username);
> if(usr != null){
> if(usr.getPassword().equals(password)){
> message = messageSource.getMessage("loginSuccess",
null,Locale.CHINA);
> }else{
> message = messageSource.getMessage("pswError",
null,Locale.CHINA);
> }
> }else{
> message = messageSource.getMessage("usrError",
null,Locale.CHINA);
> }
> return SUCCESS;
> }
>
> public void setUserService(UserServiceImp userService) {
> this.userService = userService;
> }
>
> public String getMessage() {
> return message;
> }
>
> public void setMessage(String message) {
> this.message = message;
> }
>
> public String getUsername() {
> return username;
> }
>
> public void setUsername(String username) {
> this.username = username;
> }
>
> public String getPassword() {
> return password;
> }
>
> public void setPassword(String password) {
> this.password = password;
> }
>
> public void setMessageSource(ResourceBundleMessageSource messageSource)
{
> this.messageSource = messageSource;
> }
>
> }
>
> This is the userServiceImpl:
>
> package service;
> import po.User;
>
> /**
> *
> * @author ABIS1
> */
> public class UserServiceImp implements UserService {
>
> private dao.UserDao userDao;
>
> public void addUser(String userName, String password, int admin) throws
Exception{
> po.User user = new User();
> user.setId(12);
> // user.setId(admin);
> user.setName(userName);
> user.setPassword(password);
> try
> {
> userDao.save(user);
> }
> catch(Exception err)
> {
> throw err;
> }
> }
> public User getUser(long userId)
> {
> return userDao.getUser(userId);
> }
>
> public void setUserDao(dao.UserDaoImpl userDao) {
> this.userDao = userDao;
> }
>
> public User getUser(String userName) {
> return this.userDao.getUser(userName);
> }
>
> }
>
>
>
> -----Original Message-----
> From: Lukasz Lenart [mailto:lukasz.len...@googlemail.com]
> Sent: 19 August 2009 12:11
> To: Struts Users Mailing List
> Subject: Re: Hibernate3+Spring2.5+Struts2
>
> Hi,
>
> That the source of your problems:
> Caused by: org.hibernate.PropertyNotFoundException: Could not find a
> getter for admin in class po.User
>
> Check mapping files, you are trying to map admin property which
> doesn't exist in User class.
>
>
> Regards
> --
> Lukasz
> http://www.lenart.org.pl/
> http://dailylog.lenart.org.pl/
>
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>
>
>
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