网上书店源码（含数据库）

package com.zy.controller; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import javax.jms.Session; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import com.zy.domain.Book; import com.zy.domain.User; import com.zy.service.BookService; import com.zy.service.MyCart; import com.zy.service.UserService; public class GotoHall 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 { //验证用户是否登录 if(request.getSession().getAttribute("user")!= null){ BookService service = new BookService(); ArrayList<Book> books = service.getAllBooks(); request.setAttribute("books", books); request.getRequestDispatcher("/WEB-INF/hall.jsp").forward(request, response); return; } //接受用户信息ID PWD String id = request.getParameter("id"); String passwd = request.getParameter("passwd"); User user = new User(); user.setId(Integer.parseInt(id)); user.setPwd(passwd); //验证用户 service checkuser UserService service = new UserService(); if(service.checkUser(user)){ //将用户放到session中 request.getSession().setAttribute("user", user); //验证成功跳转到购物大厅，并准备好数据 BookService bookService = new BookService(); ArrayList<Book> books = bookService.getAllBooks(); request.setAttribute("books", books); MyCart myCart = new MyCart(); request.getSession().setAttribute("myCart", myCart); request.getRequestDispatcher("/WEB-INF/hall.jsp").forward(request, response); }else{ request.getRequestDispatcher("/WEB-INF/login.jsp").forward(request, response); } } /** * 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 { this.doGet(request, response); } }