1.需要在web.xml中配置相关信息
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<error-page>
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<error-code>403</error-code>
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<location>/403.html</location>
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</error-page>
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<error-page>
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<error-code>404</error-code>
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<location>/404.html</location>
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</error-page>
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<error-page>
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<error-code>500</error-code>
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<location>/500.html</location>
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</error-page>
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<error-page>
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<exception-type>java.lang.Exception</exception-type>
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<location>/500.jsp</location>
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</error-page>
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<error-page>
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<exception-type>java.lang.Throwable</exception-type>
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<location>/500.jsp</location>
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</error-page>
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2.如果配置是html时，不用另做配置
如果配置是Jsp时，需要把isErrorPage设置为true，
及<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" isErrorPage="true"%>
3.获取异常信息及输出
点击(此处)折叠或打开
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<%@page import="java.io.PrintStream"%>
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<%@page import="java.io.ByteArrayOutputStream"%>
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<%@ include file="WEB-INF/views/includes/tags.jsp"%>
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<%@ page language="java" contentType="text/html; charset=UTF-8"
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pageEncoding="UTF-8" isErrorPage="true"%>
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>500 服务器内部错误</title>
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</head>
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<body>
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<div class="ui-alert-panel">
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<h1>服务器内部错误</h1>
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<p>处理您的请求时发生错误！请确认您通过正确途径操作。</p>
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</div>
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<div style="display:none;">
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<% //此处输出异常信息
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exception.printStackTrace();
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ByteArrayOutputStream ostr = new ByteArrayOutputStream();
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exception.printStackTrace(new PrintStream(ostr));
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out.print(ostr);
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%>
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</div>
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</body>
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</html>
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