Struts2应用程序出错

Struts2应用程序出错,struts2,Struts2,当我尝试在Struts2应用程序的index.jsp中执行tester操作时,出现以下错误 异常java.lang.NullPointerException org.apache.struts2.impl.StrutsActionProxy.getErrorMessage(StrutsActionProxy.java:69) com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:185) org.ap

当我尝试在Struts2应用程序的index.jsp中执行tester操作时,出现以下错误

异常java.lang.NullPointerException org.apache.struts2.impl.StrutsActionProxy.getErrorMessage(StrutsActionProxy.java:69) com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:185) org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63) org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39) com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58) org.apache.struts2.dispatcher.dispatcher.serviceAction(dispatcher.java:500) org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher

下面是我的struts.xml和web.xml文件。你能告诉我它们是否有问题吗

struts.xml

/success.jsp
web.xml

框架应用
index.jsp
支柱2
org.apache.struts2.dispatcher.FilterDispatcher
支柱2
/*
index.jsp

测试页
输入参数值:
呼叫网络服务

进行以下更改并重试:

 <form action = "tester">
<h1>Test Page</h1>
 Enter the parameter value:<input id="formParameter" type="text"             title="attribute"/>
<input type=submit value="Call WebService"/>
</form>

测试页
输入参数值:

哪个S2版本?自Struts 2.1.3.Yes S2版本以来,
过滤器Dispatcher
已被弃用。我应该使用什么来代替过滤器Dispatcher?
哪个S2版本?
是S2版本:D@AndreaLigios这不仅仅是一个问题的答案。:)
<?xml version="1.0" encoding="UTF-8"?>
  <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
  id="WebApp_ID" version="2.5">

    <display-name>Framework Application</display-name>
    <welcome-file-list>
      <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <filter>
      <filter-name>struts2</filter-name>
      <filter-class>
        org.apache.struts2.dispatcher.FilterDispatcher
      </filter-class>
    </filter>

    <filter-mapping>
      <filter-name>struts2</filter-name>
      <url-pattern>/*</url-pattern>
    </filter-mapping>
  </web-app>
  <%@ page language="java" contentType="text/html; charset=ISO-8859-1"  pageEncoding="ISO-8859-1"%>
  <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
  <%@ page import="java.sql.Connection"%>
  <%@ page import="java.sql.DriverManager"%>
  <%@ page import="java.sql.ResultSet"%>
  <%@ page import="java.sql.Statement"%>


  <%@ taglib prefix="s" uri="/struts-tags"%>
 <html>
   <head>

   </head>
   <body>
   <form action = "tester">
    <h1>Test Page</h1>
     Enter the parameter value:<input id="formParameter" type="text"             title="attribute"/>
    <button>Call WebService</button>
    </form>



     </body>
  </html>
 <form action = "tester">
<h1>Test Page</h1>
 Enter the parameter value:<input id="formParameter" type="text"             title="attribute"/>
<input type=submit value="Call WebService"/>
</form>