JSP页面
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <%-- <base href="<%=basePath%>"> --%> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <a href="servlet/JstlElServlet">测试EL表达式</a><br> </body> </html>
然后去web.xml里找：
<?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"> <servlet> <servlet-name>JstlElServlet</servlet-name> <servlet-class>com.bjpowernode.jstl.JstlElServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>JstlElServlet</servlet-name> <url-pattern>/servlet/JstlElServlet</url-pattern> </servlet-mapping> </web-app>
然后找java类：
package com.bjpowernode.jstl; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class JstlElServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setAttribute("hello", "hello world"); request.getRequestDispatcher("/WEB-INF/jstl_el.jsp").forward(request, response); } }
跳转到jstl_jsp页面
<%@ page language="java" contentType="text/html; charset=GB18030" pageEncoding="GB18030"%> <!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=GB18030"> <title>Insert title here</title> </head> <body> <h1>测试EL表达式</h1> <hr> <li>普通字符串</li><br> hell0(jsp脚步):<%=request.getAttribute("hello") %><br> </body> </html>
总结：努力让那些看不起你，抛弃你的人后悔！