3 java jsp servlets custom-error-pages
在错误页面中,我想显示用户请求的URL.
在我的web.xml中:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID"
version="3.0">
<display-name>MyStuff</display-name>
<error-page>
<error-code>404</error-code>
<location>/WEB-INF/error-404.jsp</location>
</error-page>
</web-app>
这将转发到error-404.jsp,这是该文件的内容:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Page Not found</title>
</head>
<body>
<p align="center">
<%
out.println("Requested resource: " + request.getRequestURL()+ " not found");
%>
</body>
</html>
问题是request.getRequestURL()需要更改,但不知道搜索内容的关键字.
当我启动浏览器时,http://localhost:8080/MyStuff我收到以下错误:
Requested resource: http://localhost:8080/MyStuff/WEB-INF/error-404.jsp not found
怎么解决这个？
以下是JSP错误页面的一个简单示例,它显示了错误代码和请求页面的URL:
404.jsp:
<%@ page language="java" isErrorPage="true" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<title>Error page</title>
<meta charset="utf-8">
</head>
<body>
<button onclick="history.back()">Back to Previous Page</button>
<h1>404 Page Not Found.</h1>
<br />
<p><b>Error code:</b> ${pageContext.errorData.statusCode}</p>
<p><b>Request URI:</b> ${pageContext.request.scheme}://${header.host}${pageContext.errorData.requestURI}</p>
<br />
</body>
</html>
PS
强烈建议不要在JSP中使用scriptlet.阅读这篇文章.
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