使用SSM框架和jsp，实现最简单的增删查改。

package com.controller; import com.dao.ListDao; import com.pojo.MyList; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.ui.Model; import javax.annotation.Resource; import java.util.List; @Controller public class ListController { @Resource private ListDao listDao; @RequestMapping("/index") public String main(Model model){ List <MyList> cs=listDao.index(); model.addAttribute("main",cs); return "main"; } @RequestMapping("/showAll") public String show(Model model){ List <MyList> ls=listDao.showAll(); model.addAttribute("list",ls); return "list"; } @RequestMapping("/addlist") public String addeat(){ return "addList"; } @RequestMapping("/add") public String addList(String id,String name, MyList myList, Model model){ List<MyList> aa=listDao.showList(id); List<MyList> bb=listDao.showName(name); if(aa.size()==0&&bb.size()==0){ int ac=listDao.addList(myList); model.addAttribute("addlist",ac); return "redirect:/showAll"; }else{ int ca=3; model.addAttribute("add",ca); return "redirect:/addlist"; } } @RequestMapping("/delete") public String delete(String id){ listDao.deleteList(id); return "redirect:/showAll"; } @RequestMapping("/update") public String update(String id,Model model){ MyList lst=listDao.showId(id); model.addAttribute("list",lst); return "update"; } @RequestMapping("/doupdate") public String doupdate(MyList myList){ listDao.updateList(myList); return "redirect:/showAll"; } @RequestMapping("/selectList") public String select(String id,Model model){ List<MyList> cc=listDao.selectList(id); model.addAttribute("main",cc); return "main"; } @RequestMapping("/selectName") public String selectname(String name ,Model model){ List<MyList> aa=listDao.selectName(name); model.addAttribute("main",aa); return "main"; } @RequestMapping("/selectTime") public String selecttime(String buytime ,Model model){ List<MyList> dd=listDao.selectTime(buytime); model.addAttribute("main",dd); return "main"; } }