passwordForm.jsp<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();//获取上下文路径String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!--以上主要是获取路径地址 http://localhost:8080/projectname/jspname--><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><base href="<%=basePath%>"><!-头部类容--> <title>My JSP 'passwordForm.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><!--javascript语言写的代码块--><script type="text/javascript">function login(){if(document.loginform.zhanghao.value==""){window.alert("账号不能为空！");return ;}if(document.loginform.mima.value==""){window.alert("密码不能为空！");return ;}loginform.submit();}</script><form action="passwordForm_result.jsp" name="loginform"><h4 align="center"><b>欢迎登陆学生管理系统</b></h4><br> <table align="center"><tr><td>请输入账号：</td><td><input name="zhanghao" type="text"> </td></tr><tr><td>请输入密码：</td><td><input name="mima" type="password"> </td></tr><tr><td></td><td><input type="button" value="登录" onclick="login()"> <input type="button" value="忘记密码？"></td></tr></table></form></body></html>
<!--passwordForm_result.jsp--><%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%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 'passwordForm_result.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><% String user=request.getParameter("zhanghao");String password=request.getParameter("mima"); %><table align="center"><tr><td>账号为：</td><td><%= user %></td></tr><tr><td>密码为：</td><td><%= password %></td></tr></table></body></html>
结果如图所示：
查看passwordForm_result.jsp的网页源代码
会发现java代码没有显示，是因为html和javascript都是前端语言，是浏览器编译运行的，而jsp/php/asp都是在服务器端运行的后端脚本语言
