struts中validate之后返回的页面报错

Question

验证密码的代码在formbean的validate方法里。
控制转向的代码在UserLoginAction里面，如下：
/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.yourcompany.struts.action;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.yourcompany.struts.form.UserLoginForm;/**
 * MyEclipse Struts Creation date: 07-27-2007
 * 
 * XDoclet definition:
 * 
 * @struts.action path="/userLogin" name="userLoginForm" input="/userLogin.jsp"
 *                scope="request"
 * @struts.action-forward name="success" path="/userLoginSuccess.jsp"
 * @struts.action-forward name="failure" path="/userLogin.jsp"
 */
public class UserLoginAction extends Action {

public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
UserLoginForm userLoginForm = (UserLoginForm) form;
if ((userLoginForm.getUserName().equals("fan"))
&& (userLoginForm.getPassword().equals("111"))) {
request.setAttribute("userName", userLoginForm.getUserName());
return mapping.findForward("success");
}
return mapping.findForward("failure");
}
}

Answer 1

是不是我的ApplicationResources.properties写法有问题？

Answer 2

ClassCastException 是 JVM 在检测到两个类型间的转换不兼容时引发的运行时异常。此类错误通常会终止用户请求。

Answer 3

报错是由struts的标签引起的,看看是不是你的标签找不到:<%@ taglib uri="/tag/struts-html" prefix="html"%>
<%@ taglib uri="/tag/struts-bean" prefix="bean"%>改为:
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>试试.这要看你的web.xml的内容了.

Answer 4

web.xml中我就是这么定义的，应该和这个没关系，当我输入用户名fan，密码111的时候，是可以正常跳转到userLoginSuccess.jsp页面的。web.xml内容如下：<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>3</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>3</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
  <jsp-config>
<taglib>
<taglib-uri>/tag/struts-html</taglib-uri>
<taglib-location>/WEB-INF/struts-html.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/tag/struts-bean</taglib-uri>
<taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/tag/struts-logic</taglib-uri>
<taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
</taglib>
  </jsp-config>
</web-app>

Answer 5

ApplicationResources.properties文件是放在包:com.yourcompany.struts下面么??

Answer 6

是，我在页面上加入<html:message>是可以输出里面的值的

Answer 7

应该是struts版本问题,看看这两个链接:
  http://www.blogjava.net/mrklmxy/archive/2007/07/13/130164.aspx
  http://www.blogjava.net/mrklmxy/archive/2007/07/13/130164.aspx

Answer 8

上面重复了:
http://topic.csdn.net/t/20050822/08/4222304.html