?1 login.jsp ?2 ??3 <%@page contentType="text/html" ?pageEncoding="UTF-8"%> ?4 <% ?5 String path = request.getContextPath(); ?6 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; ?7 %> ?8 ??9 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 10 <html> 11 ??<head> 12 ????<base href="<%=basePath%>"> 13 ?????14 ????<title>用户登录界面</title> 15 ?????16 ????<meta http-equiv="pragma" content="no-cache"> 17 ????<meta http-equiv="cache-control" content="no-cache"> 18 ????<meta http-equiv="expires" content="0"> ????19 ????<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 20 ????<meta http-equiv="description" content="This is my page"> 21 ????<!-- 22 ????<link rel="stylesheet" type="text/css" href="styles.css"> 23 ????--> 24 ?25 ??</head> 26 ???27 ??<body> 28 ???<form action="loginCheck" method="post"> 29 ???用户名: <input type="text" name="name"><br><br> 30 ???密码: ??<input type="password" ?name="password"><br><br> 31 ???<input type="submit" ?value="确 ?认"> 32 ???<input type="reset" ??value="取 ?消"> 33 ???</form> 34 ??</body> 35 </html> 36 ?37 ?38 LoginCheckServlet.java 39 ?40 package servlets; 41 ?42 import java.io.IOException; 43 //import java.io.PrintWriter; 44 ?45 import javax.servlet.ServletException; 46 import javax.servlet.http.HttpServlet; 47 import javax.servlet.http.HttpServletRequest; 48 import javax.servlet.http.HttpServletResponse; 49 ?50 public class LoginCheckServlet extends HttpServlet { 51 ?52 ?53 ????/** 54 ?????* ?55 ?????*/ 56 ????private static final long serialVersionUID = 1L; 57 ?58 ????public void doPost(HttpServletRequest request, HttpServletResponse response) 59 ????????????throws ServletException, IOException { 60 String Name=request.getParameter("name"); 61 String Password=request.getParameter("password"); 62 String info=""; 63 if(("abc".equals(Name))&&("123".equals(Password))){ 64 ????info="欢迎你的登录"+Name+"!";} 65 ????else 66 ????{info="登陆失败!";} 67 request.setAttribute("outputMessage",info); 68 request.getRequestDispatcher("info.jsp").forward(request,response); 69 } 70 ????????//response.setContentType("text/html"); 71 ?????????72 ?????73 ????} 74 ?75 info.jsp 76 ?77 <%@ page ?pageEncoding="UTF-8"%> 78 <% 79 String path = request.getContextPath(); 80 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 81 %> 82 ?83 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 84 <html> 85 ??<head> 86 ????<base href="<%=basePath%>"> 87 ?????88 ????<title>显示页面</title> 89 ?????90 ????<meta http-equiv="pragma" content="no-cache"> 91 ????<meta http-equiv="cache-control" content="no-cache"> 92 ????<meta http-equiv="expires" content="0"> ????93 ????<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 94 ????<meta http-equiv="description" content="This is my page"> 95 ????<!-- 96 ????<link rel="stylesheet" type="text/css" href="styles.css"> 97 ????--> 98 ?99 ??</head>100 ??101 ??<body>102 ???<%=request.getAttribute("outputMessage") %>103 ??</body>104 </html>基于jsp+servlet的登录用户界面验证
原文地址：http://www.cnblogs.com/jun699701/p/7816677.html