1、新建一個介面類繼承JpaRepository

package com.tg;

import org.springframework.data.jpa.repository.JpaRepository;

import java.util.List;

/**
 * Created by Administrator on 2017-10-11.
 */
public interface GirlRepository extends JpaRepository<Girl,Integer> {
    //通過年齡查詢 
    public List<Girl> findByAge(Integer age);
}
 

2、Controller示例程式碼 （資料庫 增、刪、改、查）

package com.tg;

import jdk.internal.org.objectweb.asm.tree.analysis.Value;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
 * Created by Administrator on 2017-10-11.
 */
@RestController
public class GirlController {

    @Autowired
    private GirlRepository girlRepository;

    @Autowired
    private GirlService girlService;

    /**
     *  查詢所有資料
     * @return
     */
    @GetMapping(value = "/girls")
    public List<Girl> girlList(){
         return  girlRepository.findAll();
    }

    /**
     *新增一條資料
     * @param age
     * @param name
     * @return
     */
    @PostMapping(value = "/girls")
    public Girl girlAdd(@RequestParam("age")Integer age,
                          @RequestParam("name") String name){
        Girl girl =new Girl();
        girl.setAge(age);
        girl.setName(name);
        return girlRepository.save(girl);
    }

    /**
     * 根據id查詢資料
     * @param id
     * @return
     */
    @GetMapping(value = "/girls/{id}")
    public Girl girlFindOne(@PathVariable("id")Integer id){
        return girlRepository.findOne(id);
    }

    /**
     *更新資料
     * @param id
     * @param age
     * @param name
     * @return
     */
    @PutMapping(value = "/girls/{id}")
    public Girl girlUpdate(@PathVariable("id")Integer id,
                            @RequestParam("age")Integer age,
                            @RequestParam("name")String name){
        Girl girl =new Girl();
        girl.setAge(age);
        girl.setName(name);
        girl.setId(id);
        return girlRepository.save(girl);
    }

    /**
     * 根據id刪除
     * @param id
     */
    @DeleteMapping(value = "/girls/{id}")
    public void girlDelete(@PathVariable("id")Integer id){
        girlRepository.delete(id);
    }

    /**
     * 通過年齡查詢
     * @param age
     * @return
     */
    @GetMapping(value = "/age/{age}")
    public List<Girl> girlListByAge(@PathVariable("age") Integer age){
        return girlRepository.findByAge(age);
    }
/*同時插入兩條資料*/
    @PostMapping(value = "/two")
    public void girlTwo(){
        girlService.insertTwo();
    }
}
 

package com.tg;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.transaction.Transactional;

/**
 * Created by Administrator on 2017-10-11.
 */
@Service
public class GirlService {
    @Autowired
    private GirlRepository girlRepository;
    @Transactional       //事件註解
    public void insertTwo(){
         Girl girlF =new Girl();
        girlF.setName("FEEEEWW");
        girlF.setAge(16);
        girlRepository.save(girlF);

        Girl girlH =new Girl();
        girlH.setName("H");
        girlH.setAge(18);
        girlRepository.save(girlH);
    }
}