1：首先分别切好一个404和500的页面
2：在工程的web.xml里面配置
<!-- 404页面 -->
<error-page>
<error-code>404</error-code>
<location>/front/front_404.jsp</location>(里面写你的页面所存放的路径)
</error-page>
<!-- 500页面 -->
<error-page>
<error-code>500</error-code>
<location>/front/front_500.jsp</location>
</error-page>
3;关键代码
isErrorPage="true"和<%response.setStatus(HttpServletResponse.SC_OK);%>
例子如下：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" isErrorPage="true"%>
<%response.setStatus(HttpServletResponse.SC_OK);%>
<!DOCTYPE html>
<html>
<head>
<%@ include file="../pages/common/master.jsp"%>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" href="${ctx}/resources/css/style.css" type="text/css" />
<title>404</title>
</head>
<body style="background:none;">
<div class="ds_center">
<img src="${ctx}/resources/images/404_r1_c1.png" />
抱歉，您访问的页面已经迷失了！<br />
<a href="${ctx}/userInfo/front_login.htm">返回登录页</a> <a href="javascript:history.go(-1);" style="margin-left:50px;">返回上一层</a>
</div>
</body>
</html>