用servlet进行用户名和密码校验

一、地址

链接: https://pan.baidu.com/s/1BFrPTkYAb8tyR1qi-GlO7w 提取码: 9gga 复制这段内容后打开百度网盘手机App，操作更方便哦

二、代码

html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>西南石油大学电子邮件系统</title>
<link rel="stylesheet" type="text/css" href="css/style.css">
</head>

<body>

	<div class="top">
		<div class="r1">
			<div class="r2">
				<div class="logo"></div>
			</div>
			<a href="" target="" class="help">帮助</a>
		</div>
	</div>

	<div class="content">
		<div class="loginBar">
			<div class="box">
				<div class="tab">
					账号登录
					<div class="dragbar"></div>
				</div>
			</div>
			<div class="boxc">
				<div style="height: 10px;"></div>
				<div style="margin-left: 42px; width: 270px; height: 30px;">
					<div class="hh" id="hd">用户登录</div>
				</div>
				<form method="post" action="LoginServlet"  >
				<input type="text" class="text" name="username" id="username" style="ime-mode: disabled" _autocomplete="off" placeholder="用户名" />
					<input type="password" class="text" name="password" id="password" _autocomplete="off" placeholder="密码" />
					<div style="height: 10px;"></div>
					<div class="bl">
						<span style="float: left;"> <font style="color: red; font-family: 宋体; clear: both;">学生选择@stu.swpu.edu.cn</font>
						</span> <span style="float: right;"> <a href="" style="outline: none; color: #999;">忘记密码</a>
						</span>
					</div>
					<input type="submit" class="btn" value="登 录" style="background: url(img/login_btn.jpg)" />
				</form>

			</div>
		</div>
	</div>

	<div class="bottom">西南石油大学</div>

</body>
</html>

　　

servlet

package com.swpu;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class LoginServlet
 */
@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	private String User;
	private String Password;
	

       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public LoginServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.getWriter().append("Served at: ").append(request.getContextPath());
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.setContentType("text/html;charset=UTF-8");
		response.setCharacterEncoding("utf-8");
		PrintWriter out=response.getWriter();
		//获取参数
		User=request.getParameter("username");
		Password=request.getParameter("password");

		if(User.equals("tom") && Password.equals("123")) {
			out.print("<h1>登陆成功</h1>");
			out.print("欢迎 : " + User+",您的密码是:"+Password);
		}else if(User==""||Password==""){
			out.print("<h1>用户名或密码不能为空</h1>");
		}else {
			out.print("<h1>用户名或密码错误</h1>");
		}
			out.close();
	}

}

　　

三、截图

 

posted @ 2019-03-28 10:21  DoNg_一隅  阅读(333)  评论(0)    收藏  举报