JSP_实现Servlet登陆，注册，链接Mysql数据库。_MySQL

也是一个MVC的实例

源码：http://download.csdn.net/detail/svitter/7532621

user.sql:

-- phpMyAdmin SQL Dump-- version phpStudy 2014-- http://www.phpmyadmin.net---- 主机: localhost-- 生成日期: 2014 年 06 月 21 日 17:42-- 服务器版本: 5.5.38-- PHP 版本: 5.3.28SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";SET time_zone = "+00:00";/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;/*!40101 SET NAMES utf8 */;---- 数据库: `users`---- ------------------------------------------------------------ 表的结构 `ur`--CREATE TABLE IF NOT EXISTS `ur` (  `name` varchar(255) NOT NULL,  `passwd` varchar(255) NOT NULL,  `id` bigint(20) NOT NULL AUTO_INCREMENT,  PRIMARY KEY (`id`)) ENGINE=MyISAM  DEFAULT CHARSET=gbk AUTO_INCREMENT=2 ;---- 转存表中的数据 `ur`--INSERT INTO `ur` (`name`, `passwd`, `id`) VALUES('a', 'a', 1);/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;

  JSP_servlet_javabean			配置用於用戶登錄的Servlet		LoginServlet		LoginServlet		LoginServlet	  			LoginServlet		/LoginServlet				配置用於用戶注册的Servlet		RegisterServlet		RegisterServlet		RegisterServlet	  			RegisterServlet		/RegisterServlet		    	login.html  	

lib:

mysql-connector-java.jar;

mysql-connector-java-5.1.17.jar;

login.html:

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%>	<%		String checkLogin = (String)(request.getAttribute("checkLogin"));	%>	

<%@ page contentType="text/html; charset=utf-8"%><%@ page import="bean.userBean"%>	<%		userBean user = (userBean) (request.getAttribute("user"));		session.setAttribute("user", user);	%>	

import java.io.*;import javax.servlet.*;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import bean.ConnectionBean;import bean.userBean;/** * @author Svitter * */@SuppressWarnings("serial")public class  LoginServlet extends HttpServlet {	userBean user =  new userBean();	ConnectionBean connBean = new ConnectionBean();	public void doPost(HttpServletRequest request, HttpServletResponse response)	throws ServletException, IOException {		String checkLogin;		String username = request.getParameter("login");		String password = request.getParameter("password");		checkLogin = connBean.checkUser(username, password);		if(checkLogin.equals("Success")) {			user.setUserName(username);			request.setAttribute("user", user);			getServletConfig().getServletContext().getRequestDispatcher("/loginsuccess.jsp").forward(request, response);		} else {			request.setAttribute("checkLogin", checkLogin);			getServletConfig().getServletContext().getRequestDispatcher("/loginCheck.jsp").forward(request, response);		}	}	public void doGet(HttpServletRequest request, HttpServletResponse response)	throws ServletException, IOException{		doPost(request, response);	}}

import java.io.*;import javax.servlet.*;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import bean.ConnectionBean;import bean.userBean;/** * @author Svitter * */@SuppressWarnings("serial")public class  RegisterServlet extends HttpServlet {	userBean user =  new userBean();	ConnectionBean connBean = new ConnectionBean();	public void doPost(HttpServletRequest request, HttpServletResponse response)	throws ServletException, IOException {		String username = request.getParameter("login");		String password = request.getParameter("password");		connBean.addUser(username, password);		getServletConfig().getServletContext().getRequestDispatcher("/login.html").forward(request, response);	}	public void doGet(HttpServletRequest request, HttpServletResponse response)	throws ServletException, IOException{		doPost(request, response);		}}