Java web登录学习

下面是我们另一个登录的简单测试用的jsp文件

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<html>

<head>

<title>login.jsp页面</title>

</head>

<body>

用户名：<input type="text" value=""name="username"><br>

密码：<input type="text"value="" name="password"><br>

</form>

<%=(String)request.getAttribute("usertxt") %>

</body>

</html>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<html>

  <head>

    <title>loginCL.jsp页面</title>

  </head>

  <body>

<%

String referer = request.getHeader("Referer");

if(referer==null||referer.trim().length()==0||

!referer.equals("http://localhost:8080/denglu/login.jsp")){

response.sendRedirect("login.jsp");

return;

}

request.setCharacterEncoding("utf-8");

response.setContentType("text/html;charset=utf-8");

String name=request.getParameter("username");

String password=request.getParameter("password");

//判断登陆界面的用户名和密码，根据输入的不同情况进行不同的处理

if(name.trim().equals("赵文哲")&&password.trim().equals("12345678"))

{

request.setAttribute("usertxt", "正常登录！！！");

request.getRequestDispatcher("success.jsp").forward(request, response);

}

else{

request.setAttribute("usertxt", "用户名或密码错误！！！");

request.getRequestDispatcher("login.jsp").forward(request, response);

 

}

%>

  </body>

</html>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<html>

  <head>

    <title>success.jsp页面</title>

  </head>

  <body>

<%

String referer = request.getHeader("Referer");

if(referer==null||referer.trim().length()==0||

!referer.equals("http://localhost:8080/denglu/login.jsp")){

response.sendRedirect("login.jsp");

return;

}

request.setCharacterEncoding("utf-8");

response.setContentType("text/html;charset=utf-8");

%>  

<%=(String)request.getAttribute("usertxt") %>

  </body>

</html>