前端界面部分:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="login_result.jsp"method="post">
   <h1 align="center">用户登录</h1>
   <table align="center">
    <tr>
       <td>用户名称:</td>    
       <td><input type="text" value=""  name="id"/></td> 
    </tr>
   
    <tr>
       <td>用户密码:</td>    
       <td><input type="password" value="" name="pass"/></td> 
    </tr>
    <tr>
     
     <td><input type="reset" value="重置键"></td>
      <td><input type="submit"></td>

   </tr>
 </table>
 </form>

</body>
</html></html>

后台进行死数据对比:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
//1 获取页面上的登录信息
String id =request.getParameter("id");//获取账号
String pass = request.getParameter("pass");//获取密码

//2 登录验证(跟自己的QQ账号密码比,比死的:下去把自己的账号密码和文件中对比;后期跟数据库中对比,比活的)
  if(id.equals("123") && pass.equals("1234")){
	//登陆成功
	response.sendRedirect("login1.jsp");
}else{
%>
   <jsp:forward page = "login2.jsp"></jsp:forward>               

<% 	
}
%>

</body>
</html>

输入正确跳转的界面:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
主页正在开发,敬请期待。。。。。
</body>
</html>

输入错误的界面:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>

登录失败,请<a href="login.jsp" >重新登录</a>

</body>
</html>