图书管理系统（mvc模式+javaweb）

package controller; import java.io.IOException; import java.util.List; 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 entity.Cbs; import entity.Shu; import service.CbsService; import service.ShuService; @WebServlet("/edit") public class EditController extends HttpServlet { private static final long serialVersionUID = 1L; private ShuService shuservice = new ShuService(); private CbsService cbsservice = new CbsService(); /**Get * -打开编辑页 */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.获取参数 int id = Integer.parseInt(request.getParameter("id")); //2.业务处理 Shu shu = shuservice.getById(id); List<Cbs> cbsList = cbsservice.getAll(); //3. 返回视图， 调用V-请求转发 request.setAttribute("shu", shu); request.setAttribute("cbsList", cbsList); request.getRequestDispatcher("/WEB-INF/jsp/edit.jsp").forward(request, response); } /**Post * -执行修改 */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.获取参数 int id = Integer.parseInt(request.getParameter("id")); String name = request.getParameter("name"); String author = request.getParameter("author"); Double price = Double.parseDouble(request.getParameter("price")); int cbsId = Integer.parseInt(request.getParameter("cbsId")); Shu shu = new Shu(id, name, author, price, cbsId); //2. 业务处理 - 执行修改 shuservice.update(shu); //3. 返回视图, 请求重定向-调用【列表查询】的C response.sendRedirect(request.getContextPath()+"/list"); } }