Controller

package com.controller;


import com.entity.Piano;
import org.dom4j.rule.Mode;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import com.service.PianoServiceImpl;

import javax.annotation.Resource;
import java.util.List;

@Controller
@RequestMapping("/piano")
public class PianoController {
    static {
        System.out.println("piano服务器");
    }

    @Resource
    private PianoServiceImpl pianoService;

    @RequestMapping("/hello")
    public String hello(){
        return "index";
    }

    @RequestMapping("/list")
    public String list(Model model) {
        System.out.println("hello");
        List<Piano> list = this.pianoService.findAll();
        model.addAttribute("list", list);
        return "list";
    }

    @RequestMapping("/del/{id}")
    public String del(@PathVariable int id,Model model) {
        this.pianoService.del(id);
        model.addAttribute("result", "删除成功");
        return "result";
    }

    @RequestMapping("/newPiano")
    public String newPiano(){
        return "piano";
    }

    @RequestMapping("/add")
    public String addPiano(Piano piano, Model model) {
        String i = this.pianoService.add(piano);
        if (i != "") {
            model.addAttribute("result", "添加"+i+"成功");
            return "result";
        } else {
            model.addAttribute("result", "添加失败");
            return "result";
        }
    }

    @RequestMapping("/update/{id}")
    public String updatePianoById(@PathVariable int id, Model model) {
        System.out.println("修改Piano:" + id);
        Piano piano = this.pianoService.getById(id);
        piano.toString();
        model.addAttribute("piano",piano);
        return "update";
    }

    @RequestMapping("/updatePiano/{id}")
    public String updatePiano(Piano piano,Model model,@PathVariable int id){
        System.out.println("UpdatePiano:"+piano.toString());
        //piano.setId(id);
        this.pianoService.update(piano);
        model.addAttribute("result","更新成功"+piano.toString());
        return "result";
    }
}

Service

package com.service;

import com.dao.PianoDaoImpl;
import com.entity.Piano;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.List;

@Service
@Transactional(readOnly = false)
public class PianoServiceImpl {

    @Resource
    private PianoDaoImpl pianoDao;

    /**
     * @param
     * @return java.util.List<com.entity.Piano>
     * @description
     * @date 2020/3/25
     * @author Charlotte
     */
    public List<Piano> findAll() {
        return this.pianoDao.findAllPiano();
    }

    public void del(int id) {
        this.pianoDao.delPiano(id);
    }

    public String add(Piano piano) {
        return this.pianoDao.save(piano);
    }

    public Piano getById(int id){
        return this.pianoDao.getById(id);
    }

    public void update(Piano piano){
        System.out.println("updateService:"+piano.getBrand());
        this.pianoDao.update(piano);
    }
}

Dao

package com.dao;

import com.entity.Piano;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.query.Query;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.List;

//持久层注解
@Repository
public class PianoDaoImpl {

    @Resource
    private SessionFactory sessionFactory;

    public List<Piano> findAllPiano() {
        Query query = this.sessionFactory.getCurrentSession().createQuery("from Piano");
        return query.list();
    }

    public void delPiano(int id) {
        //Query query = this.sessionFactory.getCurrentSession().createQuery("delete from Piano where id = :id ");
        Session session = this.sessionFactory.getCurrentSession();
        session.createQuery("delete Piano p where p.id=" + id).executeUpdate();
        //Piano piano = this.sessionFactory.getCurrentSession().delete();

    }

    public String save(Piano piano) {
        this.sessionFactory.getCurrentSession().save(piano);
        return piano.getBrand();
    }

    public Piano getById(int id){
       return this.sessionFactory.getCurrentSession().get(Piano.class,id);
    }

    public void update(Piano piano){
        System.out.println("updateDao:"+piano.toString());
        Session session = this.sessionFactory.getCurrentSession();
        session.saveOrUpdate(piano);


    }
}

Spring+hibernate+JSP实现Piano的数据库操作---2.Controller+Service+Dao

原文：https://www.cnblogs.com/charlottepl/p/12573619.html