1、首先简介一下什么是MVC思想。

在百度百科里面对MVC的说明，MVC全名是Model View Controller。是模型(model)－视图(view)－控制器(controller)的缩写。那么在JAVA的web开发中。MVC各自是相应于：显示页面（视图）、数据对象（模型）、业务处理（控制器）。

简单举个样例来说，在学生信息管理系统里。登陆界面就是一个视图。而登陆完毕后。进行username和password推断并跳转对应的页面，就是控制器，而保存username和password的对象，就是模型。三者的关系就是这样。

我们以下给出了一个java动态网页的样例。

2、文件结构

3、所要用到的

tomcat7.0

4、代码结构

UserCheck

package com.test.dao;import com.test.vo.User;public class UserCheck {public boolean login(User user){if(user.getUsername().equals("admin") && user.getPassword().equals("123456"))return true;return false;}}

UserLogin

package com.test.service;import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import com.test.dao.UserCheck;
import com.test.vo.User;/*** Servlet implementation class UserLogin*/
@WebServlet("/UserLogin")
public class UserLogin extends HttpServlet {private static final long serialVersionUID = 1L;/*** Default constructor. */public UserLogin() {// 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}/*** @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)*/protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubUser u=new User();u.setUsername(request.getParameter("username"));u.setPassword(request.getParameter("password"));System.out.println(request.getParameter("username")+" "+request.getParameter("password"));UserCheck dao=new UserCheck();if(dao.login(u)){response.sendRedirect("login_s.jsp");}else{response.sendRedirect("login_f.jsp");}}}

User

package com.test.vo;public class User {private String username;public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}private String password;
}

静态页面比較简单，就不贴上来了。