异常信息:
[code="java"]
hibernateTemplate: null
2008-11-5 11:02:44 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet dispatcherServlet threw exception
java.lang.NullPointerException
at com.test.dao.jdbc.UserDAO.insert(UserDAO.java:11)
at com.test.controller.LoginController.onSubmit(LoginController.java:21)
at org.springframework.web.servlet.mvc.SimpleFormController.onSubmit(SimpleFormController.java:408)
at org.springframework.web.servlet.mvc.SimpleFormController.onSubmit(SimpleFormController.java:380)
at org.springframework.web.servlet.mvc.SimpleFormController.processFormSubmission(SimpleFormController.java:267)
at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:250)
at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:45)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:820)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:755)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:396)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:360)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:78)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:595)
[/code]
web.xml:
[code="java"]
<?xml version="1.0" encoding="UTF-8"?>
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
<display-name>TestDemo</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<servlet>
<servlet-name>context</servlet-name>
<servlet-class>org.springframework.web.context.ContextLoaderServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>
org.springframework.web.filter.CharacterEncodingFilter
</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
[/code]
applicationContext.xml:
[code="java"]
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.microsoft.jdbc.sqlserver.SQLServerDriver"/>
<property name="url" value="jdbc:sqlserver://localhost:1433;databaseName=test"/>
<property name="username" value="sa"/>
<property name="password" value=""/>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="mappingResources">
<list>
<value>com/test/domain/User.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</prop>
</props>
</property>
</bean>
<bean id="userDAO" class="com.test.dao.jdbc.UserDAO">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
[/code]
dispatcherServlet-servlet.xml:
[code="java"]
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/login.do">loginController</prop>
</props>
</property>
</bean>
<bean id="loginController" class="com.test.controller.LoginController">
<property name="successView" value="/admin/success"></property>
<property name="formView" value="/admin/login"></property>
</bean>
[/code]
IUserDAO.java:
[code="java"]
package com.test.dao;
import com.test.domain.User;
public interface IUserDAO {
public void insert(User user);
public User find(Integer id);
}
[/code]
BaseDao.java:
[code="java"]
package com.test.dao.jdbc;
import java.util.List;
import org.springframework.dao.DataAccessException;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
public class BaseDao extends HibernateDaoSupport {
public int getTotal(String hql) {
try {
List result = this.getHibernateTemplate().find(hql);
if (null != result && !result.isEmpty()) {
return ((Integer) result.get(0)).intValue();
} else {
return 0;
}
} catch (DataAccessException e) {
return 0;
}
}
}
[/code]
UserDAO.java:
[code="java"]
package com.test.dao.jdbc;
import java.util.*;
import com.test.dao.IUserDAO;
import com.test.domain.User;
public class UserDAO extends BaseDao implements IUserDAO {
public void insert(User user) {
System.out.println("hibernateTemplate: " + this.getHibernateTemplate());
this.getHibernateTemplate().update("INSERT INTO USERPASS (USERNAME, PASSWORDS) VALUES ('" + user.getUserName() +"', '" + user.getPassword() + "')");
}
public User find(Integer id) {
List rows = this.getHibernateTemplate().find("SELECT * FROM USERPASS WHERE ID=" + id.intValue());
Iterator it = rows.iterator();
if(it.hasNext()) {
Map userMap = (Map)it.next();
User user = new User();
user.setUserName(userMap.get("USERNAME").toString());
user.setPassword(userMap.get("PASSWORDS").toString());
return user;
}
return null;
}
}
[/code]
LoginController.java:
[code="java"]
package com.test.controller;
import org.springframework.web.servlet.mvc.SimpleFormController;
import org.springframework.web.servlet.*;
import com.test.domain.User;
import com.test.dao.*;
import com.test.dao.jdbc.*;
public class LoginController extends SimpleFormController {
public LoginController() {
setCommandClass(User.class);
}
protected ModelAndView onSubmit(Object commond) throws Exception {
User user = (User)commond;
String name = user.getUserName();
String pass = user.getPassword();
IUserDAO userDAO = new UserDAO();
userDAO.insert(user);
user = userDAO.find(new Integer(1));
if(name.equals(user.getUserName()) && pass.equals(user.getPassword())) {
return new ModelAndView(getSuccessView(), "user", user.getUserName());
} else {
return new ModelAndView(getFormView());
}
}
}
[/code]