用Servlet进行用户名和密码校验

一、界面展示

二、登录成功显示

三、代码

@charset "UTF-8";
.content{
    width:400px;
    height:280px;
    margin-left:35%;
    margin-top:100px;
    background-color:#ffd0d0;
    text-align:center;
    padding-top:30px;
}
.box{
    width:200px;
    height:200px;
    margin-top:50px;
    text-align:center;
    margin-left:25%;
}

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
   <link rel="stylesheet" type="text/css" href="NewStyle.css">
</head>
<body>
<div class="content">
<h2 >用户登录</h2>
<div class="box">
<form action="/load/TestServlet" id="loading" method="post">
<input type="text" placeholder="用户名" id="name" name="username"><br><br>
<input type="password" placeholder="密码" id="pwd" name="password"><br><br>
<button type="submit" id="btn">登录</button>
</form>
</div>
</div>
</body>
</html>

　　

package load;

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 TestServlet
 */
@WebServlet("/TestServlet")
public class TestServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public TestServlet() {
        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());
        request.setCharacterEncoding("UTF-8");
        response.setContentType("text/html;charset=utf-8");
        String uname=request.getParameter("username");
        String pwd=request.getParameter("password");
        if(("tom").equals(uname)&&("123").equals(pwd)) {
            //response.sendRedirect("/load/Welcome.html");
            PrintWriter out=response.getWriter();
            out.write("用户名是："+uname+"，密码是："+pwd);
        }
        else {
            response.sendRedirect("/load/NewFile.html");
        }
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
        
    }

}

 

posted @ 2019-03-30 16:04  Kn4vE  阅读(236)  评论(0)  编辑  收藏  举报