SpringMVC初学者使用的CRUD

package com.controller; import java.util.List; import java.util.Map; import javax.annotation.Resource; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import com.dao.TypeDao; import com.entity.Type; @Controller public class TypeController { private Map<String,Object> map; private List<Type> tlist; private String t_type; private int t_id; private Type ty; @Resource private TypeDao typeDao; @RequestMapping("querytype") public String queryType(Map<String,Object> map) { // TODO Auto-generated method stub tlist=typeDao.queryAll(); if(tlist.size()>0){ map.put("type",tlist); return "typelist"; }else{ return "error"; } } @RequestMapping("add") public String findadd() { // TODO Auto-generated method stub return "addtype"; } @RequestMapping("addType") public String addType(Type tt) { // TODO Auto-generated method stub int i= typeDao.addType(tt); if(i>0){ return "redirect:querytype"; }else{ return "error"; } } @RequestMapping("queryById") public String queryById(@RequestParam("t_id") int t_id,Map<String,Object> map) { // TODO Auto-generated method stub ty=typeDao.queryById(t_id); map.put("type",ty);//小写type不能用其他名称取代，接ty实体只能用type return "uptype"; } /** * 通过SpringMVC框架特有的pojo属性，将修改的实体属性值封装 * **/ @RequestMapping("updateType") public String update(Type tt){ // TODO Auto-generated method stub System.out.println(tt); int i=typeDao.updateInfo(tt); System.out.println(i); return "redirect:querytype"; } @RequestMapping("delType") public String delete(@RequestParam("t_id") int t_id) { // TODO Auto-generated method stub int i= typeDao.delInfo(t_id); return "redirect:querytype"; } public Map<String, Object> getMap() { return map; } public void setMap(Map<String, Object> map) { this.map = map; } public Type getTy() { return ty; } public void setTy(Type ty) { this.ty = ty; } public int getT_id() { return t_id; } public void setT_id(int t_id) { this.t_id = t_id; } }