404问题

可能問題:
1、web.xml文件中未配置ActionServlet。
2、struts-config.xml文件未配置你要访问的Action。(還有類名的大小寫問題)
3、你的jsp文件form标记中action属性的路径名称错误。
4、CLASSPAth 中没有加上
%JAVA_HOME%libdt.jar
%JAVA_HOME%lib ools.jar

我都检查过了，而且我的登陆页面能够成功登陆，从成功登陆页面调用是就出错啦，代码如下
成功登陆页面
<%@ page language="java" pageEncoding="utf-8"%><%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html lang="true">
  <head>
  </head>

  <body>
    欢迎
    <%=request.getAttribute("user").toString()%>
    登陆
    <html:form action="/query" method="post">
     <html:submit>查询</html:submit>
    </html:form>
  </body>
</html:html>struts配置文件  <action
      input="/showData.jsp"
      path="/query"
      name="loginForm"
      validate="false"
      type="com.iss.action.QueryAction">
      <forward name="show" path="/showData.jsp" />
  </action>Action类/*
* Generated by MyEclipse Struts Template path: templates/java/JavaClass.vtl
*/
package com.iss.action;import java.util.List;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.iss.DAOFactory.UserDaoFactory;/**
* MyEclipse Struts Creation date: 09-20-2007
*
* XDoclet definition:
*
* @struts.action validate="true"
*/
public class QueryAction extends Action
{
/*
* Generated Methods
*/ /**
* Method execute
*
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
{
List list = UserDaoFactory.getUserDaoInstance().queryUser();
request.setAttribute("list", list);
return mapping.findForward("show");
}
}
要显示的页面<%@ page language="java" pageEncoding="utf-8"%><%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic"%>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html lang="true">
<head>
<html:base />
<title>showData.jsp</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

</head><body>
<%request.getAttribute("list");%>
<logic:iterate id="list" name="list">
<bean:write name="list" property="username" />
<bean:write name="list" property="password" />
</logic:iterate>
</body>
</html:html>请高手指教！

报404错误，/showData.jsp路径不可用

看下你的WEB.XML的配置文件.路径是否正确

input="/showData.jsp"
这句话错了.去掉看看

不要用相对路径，/showData.jsp前加工程名，如果这个jsp页面外面还套了个文件夹，还要加上文件夹名。

解决方案 »