web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<error-page>
<error-code>404</error-code>
<location>/building.jsp</location>
</error-page>
<error-page>
<error-code>500</error-code>
<location>/error.jsp</location>
</error-page>
</web-app>
JSP页面的关键在于
1 isErrorPage="true"
2 response.setStatus(HttpServletResponse.SC_OK);
等价于
response.setStatus(200);
error.jsp异常处理页面形式一
<%@ page language="java" contentType="text/html; charset=GBK" isErrorPage="true" pageEncoding="UTF-8"%>
<%response.setStatus(HttpServletResponse.SC_OK);%>
<%
/** *//**
* 本页面是在客户查找的页面无法找到的情况下调用的
*/
response.setStatus(HttpServletResponse.SC_OK);
%>
<body>
正在制作 <a href="javascript:history.go(-1)">返回</a>
<br/>
也可能页面连接更改了，请按 F5 键刷新整个页面看看，特别是菜单！
</body>
出错页面形式二
<%@ page language="java" contentType="text/html; charset=GBK" isErrorPage="true" pageEncoding="UTF-8"%>
<%@ page import="java.io.*,java.util.*"%>
<%response.setStatus(HttpServletResponse.SC_OK);%>
<body>
程序发生了错误，有可能该页面正在调试或者是设计上的缺陷.<br/>
你可以选择<br/> <a href=<%=request.getContextPath()+"/forum/new.jsp" %>>反馈</a>
提醒我 或者<br/><a href="javascript:history.go(-1)">返回上一页</a>
<hr width=80%>
<h2><font color=#DB1260>JSP Error Page</font></h2>
<p>An exception was thrown: <b> <%=exception.getClass()%>:<%=exception.getMessage()%></b></p>
<%
Enumeration<String> e = request.getHeaderNames();
String key;
while(e.hasMoreElements()){
key = e.nextElement();
}
e = request.getAttributeNames();
while(e.hasMoreElements()){
key = e.nextElement();
}
e = request.getParameterNames();
while(e.hasMoreElements()){
key = e.nextElement();
}
%>
<%=request.getAttribute("javax.servlet.forward.request_uri") %><br>
<%=request.getAttribute("javax.servlet.forward.servlet_path") %>
<p>With the following stack trace:</p>
<pre>
<%
exception.printStackTrace();
ByteArrayOutputStream ostr = new ByteArrayOutputStream();
exception.printStackTrace(new PrintStream(ostr));
out.print(ostr);
%>
</pre>
<hr width=80%>
</body>
测试show.jsp显示错误页面
<%@ page language="java" contentType="text/html; charset=GBK" erorPage="error.jsp" pageEncoding="UTF-8"%>
<%
int i=10/0%>