servlet测试+实战代码

package com.zlt.servlet; import com.zlt.entity.House; import com.zlt.service.HouseService; import com.zlt.service.impl.HouseServiceImpl; import javax.servlet.*; import javax.servlet.http.*; import javax.servlet.annotation.*; import java.io.IOException; import java.util.ArrayList; import java.util.List; public class HouseServlet extends HttpServlet { @Override protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HouseService service = new HouseServiceImpl(); String action = request.getParameter("action"); switch (action){ case "list": List<House> list = service.findALL(); request.setAttribute("list", list); request.getRequestDispatcher("list.jsp").forward(request, response); break; case "toAdd": request.getRequestDispatcher("add.jsp").forward(request, response); break; case "add": { String housename = request.getParameter("housename"); String height = request.getParameter("height"); House house = new House(housename, Double.parseDouble(height)); Integer flag = service.addHouse(house); if (flag > 0) { request.getRequestDispatcher("HouseServlet?action=list").forward(request, response); } break; } case "toUpdate": { String no = request.getParameter("no"); House house= service.findOne(Integer.parseInt(no)); request.setAttribute("house", house); request.getRequestDispatcher("update.jsp").forward(request, response); break; } case "update":{ String no = request.getParameter("no"); String housename = request.getParameter("housename"); String height = request.getParameter("height"); House house = new House(Integer.parseInt(no),housename, Double.parseDouble(height)); Integer flag = service.updateHouse(house); if (flag > 0) { request.getRequestDispatcher("HouseServlet?action=list").forward(request, response); } break; } case "delete":{ String no = request.getParameter("no"); Integer flag = service.delHouse(Integer.parseInt(no)); if (flag > 0) { request.getRequestDispatcher("HouseServlet?action=list").forward(request, response); } break; } case "select":{ request.getRequestDispatcher("selectOne.jsp").forward(request, response); break; } } } }