servlet 8个最基础demo

package com.cissst.controller; import java.io.IOException; 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.cissst.entity.Users; import com.cissst.service.BaseService; import com.cissst.serviceImpI.BaseServiceImpI; import com.google.gson.Gson; import com.google.gson.GsonBuilder; public class BaseServlet extends HttpServlet{ private BaseService baseService=new BaseServiceImpI(); protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { this.doPost(req, resp); } protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { if("findWithPage".equals(req.getParameter("m"))){ List<Users> list=baseService.findWithPage(); req.setAttribute("list", list); req.getRequestDispatcher("view.jsp").forward(req, resp); }else if("deleteUserInfo".equals(req.getParameter("m"))){ baseService.deleteUserInfo(Integer.parseInt(req.getParameter("d_id"))); List<Users> list=baseService.findWithPage(); req.setAttribute("list", list); req.getRequestDispatcher("view.jsp").forward(req, resp); }else if("findByOneUserInfo".equals(req.getParameter("m"))){ int id=Integer.parseInt(req.getParameter("f_id")); Users users=baseService.findByOneUserInfo( id); req.setAttribute("users", users); req.getRequestDispatcher("findByOneUserInfo.jsp").forward(req, resp); }else if("updateUserInfo".equals(req.getParameter("m"))){ Users users=new Users(); users.setId(Integer.parseInt(req.getParameter("u_id"))); users.setUsername(req.getParameter("username")); users.setPassword(req.getParameter("password")); users.setCreatTime(req.getParameter("creatTime")); users.setModifyTime(req.getParameter("modifyTime")); baseService.updateUsersInfo(users); List<Users> list=baseService.findWithPage(); req.setAttribute("list", list); req.getRequestDispatcher("view.jsp").forward(req, resp); }else if("saveUserInfo".equals(req.getParameter("m"))){ Users users=new Users(); users.setUsername(req.getParameter("username")); users.setPassword(req.getParameter("password")); users.setCreatTime(req.getParameter("creatTime")); users.setModifyTime(req.getParameter("modifyTime")); baseService.saveUsers(users); List<Users> list=baseService.findWithPage(); req.setAttribute("list", list); req.getRequestDispatcher("view.jsp").forward(req, resp); } } }