急:struts2 与spring 相结合做出的登陆实例，运行时怎么找不到文件，相关信息如下所示：
HTTP Status 404 - /testSpringStruts2/
type Status report
message /testSpringStruts2/
description The requested resource (/testSpringStruts2/) is not available.
Apache Tomcat/6.0.18
同时控制栏出现下列错误信息：
2008-9-24 16:32:12 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter struts
java.lang.NullPointerException
at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:188)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyResultType(XmlConfigurationProvider.java:479)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addResultTypes(XmlConfigurationProvider.java:450)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:407)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:239)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reload(DefaultConfiguration.java:152)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:52)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:395)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:452)
at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:201)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3709)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4363)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1116)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1214)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:293)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
at java.lang.Thread.run(Thread.java:595)
2008-9-24 16:32:12 org.apache.catalina.core.StandardContext start
严重: Error filterStart
原代码如下：
LoginService.java
package org.test.service;
public interface LoginService {
public boolean isLogin(String username,String password);
}
LoginServiceImpl .java
package org.test.service.impl;
import org.test.service.LoginService;
public class LoginServiceImpl implements LoginService {
public boolean isLogin(String username, String password) {
//判断用户所以输入的数据是否为gao,qin，如果是则登陆成功,否则失败
// TODO Auto-generated method stub
if(username.equals("gao") && password.equals("qin")){
return true;
}
return false;
}
}
LoginAction.java
package org.test.struts2Action;
import org.test.service.LoginService;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings("serial")
public class LoginAction extends ActionSupport {
private String username;
private String password;
@SuppressWarnings("unused")
private LoginService loginService;
@Override
public String execute() throws Exception {
if(loginService.isLogin(username, password)){
return SUCCESS;
}
return INPUT;
}
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 setLoginService(LoginService loginService) {
this.loginService = loginService;
}
}
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-2.0.xsd">
<bean id="loginService" class="org.test.service.impl.LoginServiceImpl"></bean>
<bean id="loginAction" class="org.test.struts2Action.LoginAction" scope="prototype">
<property name="loginService">
<ref local="loginService"/>
</property>
</bean>
</beans>
struts.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.objectFactory" value="spring"/>
<package name="qin" namespace="/" extends="struts-default">
<action name="login" class="loginAction">
<result name="success">/result.jsp</result>
<result name="input">/index.jsp</result>
</action>
</package>
</struts>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
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">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<filter>
<filter-name>struts</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>struts</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoader</listener-class>
</listener>
</web-app>
index.jsp
<%@ page language="java" pageEncoding="GB2312"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<h2>用户登陆</h2>
<s:form action="login.action" method="post">
<s:textfield name="username" label="用户名"></s:textfield>
<s:password name="password" label="密码"></s:password>
<s:submit value="登陆" name="sure"></s:submit>
</s:form>
</body>
</html>
result.jsp
<%@ page language="java" pageEncoding="GB2312"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<h2>用户信息</h2>
用户名：<s:property value="username" escape="request"/>
密码：${requestScope.password }
</body>
</html>