web.xml的配置很简单啦，网上搜一下就一大堆了。
<error-page>
<error-code>500</error-code>
<location>/error.jsp</location>
</error-page>
这里分享一下自己刚完成的自定义错误页面error.jsp，高度可用~~~欢迎提出问题指正~~
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@page isErrorPage="true" %>
<%@page import="java.text.SimpleDateFormat"%>
<%@ page import="java.io.*"%>
<%
response.setStatus(HttpServletResponse.SC_OK);
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>错误页面</title>
<script type="text/javascript" src="./javascript/jquery-1.5.1.min.js"></script>
<script>
function showErrorMessage(){
$("#errorMessageDiv").toggle();
}
$(document).ready(showErrorMessage);
</script>
</head>
<body>
<table width="100%">
<tr>
<td style="border-bottom:dotted 1px Gray;" colspan="2" >
<img src="images/error_title_icon.gif" id="img1" /> 错误提示
</td><td></td>
</tr>
<tr>
<td style=" 130px" >
<img src="images/sorry.gif" id="error_img" />
</td>
<td>尊敬的用户：<br />系统出现了异常，请重试。
<br />如果问题重复出现，请向系统管理员反馈。<br /><br />
<a id="showErrorMessageButton" href="javascript:showErrorMessage();">详细错误信息</a>
</td>
</tr>
</table>
<div id="errorMessageDiv" >
<pre>
<%
try {
//全部内容先写到内存，然后分别从两个输出流再输出到页面和文件
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
PrintStream printStream = new PrintStream(byteArrayOutputStream);
printStream.println();
printStream.println("用户信息");
printStream.println("账号：" + request.getSession().getAttribute("userName"));
printStream.println("访问的路径: " + request.getAttribute("javax.servlet.forward.request_uri"));
printStream.println();
printStream.println("异常信息");
printStream.println(exception.getClass() + " : " + exception.getMessage());
printStream.println();
Enumeration<String> e = request.getParameterNames();
if (e.hasMoreElements()) {
printStream.println("请求中的Parameter包括：");
while (e.hasMoreElements()) {
String key = e.nextElement();
printStream.println(key + "=" + request.getParameter(key));
}
printStream.println();
}
printStream.println("堆栈信息");
exception.printStackTrace(printStream);
printStream.println();
out.print(byteArrayOutputStream); //输出到网页
File dir = new File(request.getRealPath("/errorLog"));
if (!dir.exists()) {
dir.mkdir();
}
String timeStamp = new SimpleDateFormat("yyyyMMddhhmmssS").format(new Date());
FileOutputStream fileOutputStream = new FileOutputStream(new File(dir.getAbsolutePath() + File.separatorChar + "error-" + timeStamp + ".txt"));
new PrintStream(fileOutputStream).print(byteArrayOutputStream); //写到文件
} catch (Exception ex) {
ex.printStackTrace();
}
%>
</pre>
</div>
</body>
</html>