HIbernate购物车例子，实现增删改查

package com.pojo.action; import java.io.IOException; import java.io.PrintWriter; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.pojo.cn.Cat; import com.pojo.util.BaseDao; public class HibernateServlet extends HttpServlet { private BaseDao<Cat> baseDAO=new BaseDao<Cat>(); /** * Constructor of the object. */ public HibernateServlet() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * 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 { this.doPost(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 { request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); String action=request.getParameter("action"); if("initAdd".equals(action)){ initAdd(request,response); }else if("add".equals(action)){ add(request,response); }else if("edit".equals(action)){ edit(request,response); }else if("save".equals(action)){ save(request,response); }else if("view".equals(action)){ view(request,response); }else if("list".equals(action)){ list(request,response); }else if("delete".equals(action)){ delete(request,response); }else{ list(request,response); } } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } public void initAdd(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{ List<Cat> list=this.baseDAO.list("from Cat"); request.setAttribute("catList", list); request.getRequestDispatcher("/addCat.jsp").forward(request, response); } public void add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{ List<Cat> list=this.baseDAO.list("from Cat"); request.setAttribute("catList", list); request.getRequestDispatcher("/addCat.jsp").forward(request, response); } public void edit(HttpServletRequest request, HttpServletResponse response){ } public void save(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{ String description=request.getParameter("description"); String motherId=request.getParameter("motherId"); Integer motherId1=Integer.parseInt(motherId); String name=request.getParameter("name"); Cat mother=this.baseDAO.find(Cat.class, motherId1); Cat cat=new Cat(); cat.setDescription(description); cat.setName(name); cat.setMother(mother); this.baseDAO.create(cat); this.list(request, response); } public void view(HttpServletRequest request, HttpServletResponse response){ } public void list(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{ List<Cat> list=this.baseDAO.list("from Cat"); request.setAttribute("catList", list); request.getRequestDispatcher("/listCat.jsp").forward(request, response); } public void delete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{ String id=request.getParameter("id"); Cat cat=this.baseDAO.find(Cat.class, Integer.parseInt(id)); this.baseDAO.delete(cat); this.list(request, response); } }