本文共 2025 字，大约阅读时间需要 6 分钟。

1、需要添加相应的依赖包;

2、需要在application.properties文件添加配置信息；

3、需要创建一个实体类,比如Cat;

@Entitypublic class Cat {
       @Id    @GeneratedValue    private Integer id;    private String name;    private String color;    public Cat() {    }    public Cat(String name, String color) {        this.name = name;        this.color = color;    }}

4、需要创建一个接口继承CrudRepository;

public interface CatRepository extends CrudRepository
   
     {
   }
   

5、需要创建一个Service;

@Servicepublic class CatService {
       @Resource    private CatRepository catRepository;    @Transactional    public void save(Cat cat){        catRepository.save(cat);    }    @Transactional    public void delete(Integer id){        catRepository.delete(id);    }    @Transactional    public void delete(Cat cat){        catRepository.delete(cat);    }    public Iterable
   
     findAll(){        return catRepository.findAll();    }}
   

6、需要创建一个Controller;

@RestController@RequestMapping(value = "/cat")public class CatController {
       @Resource    private CatService catService;    @RequestMapping(value = "/save")    public void save(){        Cat cat = new Cat("tom","green");        catService.save(cat);    }    @RequestMapping(value = "/delete")    public void delete(){        catService.delete(1);    }    @RequestMapping(value = "/findAll")    public List
   
     findAll(){        List
    
      list = new ArrayList
     
      ();        Iterable
      
        cats = catService.findAll();        for(Cat cat : cats){            list.add(cat);        }        return  list;    }}
      
     
    
   

7、代码测试；

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