用MVC模式和jsp实现的具有一些简单功能的小项目。适合初学者理解MVC模式

package com.wxa.web.servlet; import java.io.IOException; import java.io.PrintWriter; import java.lang.reflect.InvocationTargetException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.beanutils.BeanUtils; import com.wxa.domain.User; import com.wxa.service.UserService; import com.wxa.service.impl.UserServiceImpl; public class LogServelet extends HttpServlet { /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { User u =null; request.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); //获得实体 //boolean login=false; User user =new User(); BeanUtils bu = new BeanUtils(); try { bu.populate(user, request.getParameterMap()); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } //业务调用 UserService us = new UserServiceImpl(); try { u=new User(); u = us.login(user); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } //分发 if(u!=null){ //response.getWriter().write("你登陆成功了"); request.getSession().setAttribute("userfdsa", u); //request.setAttribute("userfd", user); request.getRequestDispatcher("/success.jsp").forward(request, response); }else{ //User uu= (User) request.getAttribute("userfd"); //System.out.println(uu.getUsername()); response.getWriter().write("你登陆失败了"); } } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { } }