Spring Cache

注解	说明
@EnableCaching	开启缓存注解功能，通常加在启动类上
@Cacheable	在方法执行前先查询缓存中是否有数据，如果有数据则直接返回缓存数据;如果没有缓存数据，调用方法并将方法返回值放到缓存中
@CachePut	将方法的返回值放到缓存中
@CacheEvict	将一条或多条数据从缓存中删除

      
            org.springframework.boot
            spring-boot-starter-cache
        

CacheDemoApplication

@Slf4j
@SpringBootApplication
@EnableCaching//开启缓存注解功能
public class CacheDemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(CacheDemoApplication.class,args);
        log.info("项目启动成功...");
    }
}

UserController

@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {

    @Autowired
    private UserMapper userMapper;

    @PostMapping
    @CachePut(cacheNames = "userCache",key = "#user.id")//如果使用springCache缓存，key的生成：userCache：abc
    public User save(@RequestBody User user){
        userMapper.insert(user);
        return user;
    }

    @DeleteMapping
    @CacheEvict(cacheNames = "userCache",key = "#id")
    public void deleteById(Long id){
        userMapper.deleteById(id);
    }

	@DeleteMapping("/delAll")
    @CacheEvict(cacheNames = "userCache",allEntries = true)//所有的键值对
    public void deleteAll(){
        userMapper.deleteAll();
    }

    @GetMapping
    @Cacheable(cacheNames = "ceshi",key = "#id")
    public User getById(Long id){
        User user = userMapper.getById(id);
        return user;
    }
}