啊啊啊

啊啊啊

原創

2020-02-22 05:06

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class UserLoginServlet extends HttpServlet{
 public void doGet(HttpServletRequest request,HttpServletResponse response)
    throws ServletException,IOException{
  String username = request.getParameter("username");
  String userpwd = request.getParameter("userpwd");
  if("Mike".equals(username) && "123".equals(userpwd)) {
   response.sendRedirect("loginOK.jsp"); 
  }else {
   request.setAttribute("msg", "用戶登錄失敗");
   request.getRequestDispatcher("loginNO.jsp").forward(request, response);
  }
 }
  
 public void doPost(HttpServletRequest request,HttpServletResponse response)
   throws ServletException,IOException{
  this.doGet(request, response);
 } 

}



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

<!DOCTYPE HTML>
<html>
  <head>
    
    <title>My JSP 'index.jsp' starting page</title>
    <script type="text/javascript" src="js/jquery-3.3.1.min.js"></script>
    <script type="text/javascript">
     $(document).ready(function(){
      $("#loginBtn").click(function(){
       var username =$("#username").val();
       var userpwd = $("#userpwd").val();
       var formURL = $("form:eq(0)").attr("action");
       $.ajax({
        'url':formURL,
        'data':{'username':username,'userpwd':userpwd},
        'type':'post',
        'success':function(data){
         $("#showInfo").html(data);
        }
       });
      });
     });
    </script>
  </head>
  
  <body>
    <form action="userLoginServlet" method="post">
     用戶名:<input type="text" id="username" name="username"/><br/>
     用戶密碼:<input type="password" id="userpwd" name="userpwd"/><br/>
     <input type="button" id="loginBtn" value="用戶登錄"/>
    </form>
    <div id="showInfo"></div>
  </body>
</html>