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 stub User 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。