Loginservlet

来源：互联网发布：网络直播平台怎么赚钱编辑：程序博客网时间：2024/06/07 07:50

package com.szc.servlet;

import java.io.IOException;
import java.io.PrintWriter;

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

import com.szc.bean.UserBean;

public class LoginServlet extends HttpServlet {

   private static final long serialVersionUID = 1L;

   @Override
   protected void doGet(HttpServletRequest req, HttpServletResponse resp)
           throws ServletException, IOException {
       doPost(req, resp);
   }

   @Override
   protected void doPost(HttpServletRequest req, HttpServletResponse resp)
           throws ServletException, IOException {
       req.setCharacterEncoding("UTF-8");//设置request编码能够读取汉字
       resp.setCharacterEncoding("UTF-8");//设置response编码读取汉字
       resp.setContentType("text/html");

       PrintWriter out = resp.getWriter();//获取输出实例
       UserBean user = new UserBean();
       user.setUserid(req.getParameter("userid"));//根据表单提交获取用户名
       user.setUserpass(req.getParameter("userpass"));//根据表单提交获取密码


       out.print("<html><body>");

       if(user.getConnect()==null){//判断是否可以成功获取Connection实例
           out.println("<h3>数据库连接失败</h3>");
       }else
           switch(user.check(user.getUserid(), user.getUserpass())){
           case 0:
               out.println("<h3>没有此用户！</h3>");
               break;

           case 1:
               //登陆成功，获取姓名
               String username=user.getUsername(user.getUserid());
               user.setUsername(username);
               out.println("<h3>欢迎----"+user.getUsername()+"----登录！</h3>");
               break;
           case 2:
               //密码错误，单机登陆跳转到登陆页面
               out.println("<h3>密码错误！重新<a href=\"login.jsp\">登录</a></h3>");
               break;
       }
       out.println("</body></html>");
   }
}

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