struts 2报错

严重: Dispatcher initialization failed
Unable to load configuration. - bean - jar:file:/D:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/test/WEB-INF/lib/struts2-core-2.2.1.jar!/struts-default.xml:29:72
 at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:69)
 at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:371)
 at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:415)
 at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69)
 at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
 at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295)
 at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
 at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
 at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838)
 at org.apache.catalina.core.StandardContext.start(StandardContext.java:4488)
 at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
 at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
 at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
 at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041)
 at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964)
 at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
 at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
 at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
 at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
 at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
 at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
 at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
 at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
 at org.apache.catalina.core.StandardService.start(StandardService.java:519)
 at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
 at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
 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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
 at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: Unable to load bean: type: class:com.opensymphony.xwork2.ObjectFactory - bean - jar:file:/D:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/test/WEB-INF/lib/struts2-core-2.2.1.jar!/struts-default.xml:29:72
 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:232)
 at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:101)
 at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:180)
 at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)
 ... 31 more
Caused by: Bean type class com.opensymphony.xwork2.ObjectFactory with the name xwork has already been loaded by bean - file:/D:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/test/WEB-INF/classes/struts-default.xml:29:72 - bean - jar:file:/D:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/test/WEB-INF/lib/struts2-core-2.2.1.jar!/struts-default.xml:29:72
 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:216)
 ... 34 more
2010-11-23 23:49:23 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter struts2
Unable to load configuration. - bean - jar:file:/D:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/test/WEB-INF/lib/struts2-core-2.2.1.jar!/struts-default.xml:29:72
 at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:428)
 at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69)
 at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
 at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295)
 at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
 at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
 at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838)
 at org.apache.catalina.core.StandardContext.start(StandardContext.java:4488)
 at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
 at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
 at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
 at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041)
 at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964)
 at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
 at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
 at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
 at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
 at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
 at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
 at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
 at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
 at org.apache.catalina.core.StandardService.start(StandardService.java:519)
 at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
 at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
 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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
 at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: Unable to load configuration. - bean - jar:file:/D:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/test/WEB-INF/lib/struts2-core-2.2.1.jar!/struts-default.xml:29:72
 at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:69)
 at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:371)
 at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:415)
 ... 29 more
Caused by: Unable to load bean: type: class:com.opensymphony.xwork2.ObjectFactory - bean - jar:file:/D:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/test/WEB-INF/lib/struts2-core-2.2.1.jar!/struts-default.xml:29:72
 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:232)
 at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:101)
 at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:180)
 at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)
 ... 31 more
Caused by: Bean type class com.opensymphony.xwork2.ObjectFactory with the name xwork has already been loaded by bean - file:/D:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/test/WEB-INF/classes/struts-default.xml:29:72 - bean - jar:file:/D:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/test/WEB-INF/lib/struts2-core-2.2.1.jar!/struts-default.xml:29:72
 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:216)
 ... 34 more
2010-11-23 23:49:23 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2010-11-23 23:49:23 org.apache.catalina.core.StandardContext start
严重: Context [/test] startup failed due to previous errors

工程结构如下:

jsp代码:

 <%@ page language="java" contentType="text/html;charset=gb2312"
pageEncoding="gb2312"%>

<html>
  <head>  
    <title>登录页面</title>
    <style type="text/css">
<!--
@import url("../bbs/pic/OSX/OSX.css");
-->
    </style>
  </head>
  <body bgcolor="white" background="pic/2.jpg">
  <form action="login">
<center><h2></h2><center>
   <br></br>
          <br></br>
 <table width="50%" border="3" align="center" >
    <tr>
      <td width="42%">管理员帐号</td>
      <td width="58%"><input type="text" name="username"></td>
    </tr>
  
    <tr>
      <td>密码</td>
      <td><input type="password" name="pwd"></td>
    </tr>
   <tr>
   </table>
  <tr>
       <td  align=center><input type=submit value="登录"></td>
       </tr>
     
   </form>  
   </body>
   
</html>        
login.java代码:
package action;
public class login {
private String username;
private String password;
public String excute() throws Exception{
 return "success";
}
public void setUsername(String username) {
 this.username = username;
}
public String getUsername() {
 return username;
}
public void setPassword(String password) {
 this.password = password;
}
public String getPassword() {
 return password;
}
}
struts.xml代码:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" " http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="struts2" extends="struts-default">
<action name="login" class="action.login">
<result>
/success.jsp
</result>
</action>
</package>
</struts>   
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