SpringDataJPA筆記(10)-動態設置表名
在實際使用中可能會遇到需要動態設置表名的情況,特別是通常在後臺管理系統裏面,總有一些相似的功能需要抽象出來寫一些公共的方法,以減少代碼開發量,降低重複勞動
首先看BaseRepository的代碼
@NoRepositoryBean
public interface BaseRepository<T, ID extends Serializable> extends JpaRepository<T, ID>, JpaSpecificationExecutor<T>, Serializable {
@Transactional
@Modifying(clearAutomatically = true)
@Query("update #{#entityName} t set t.age=?2 where t.id = ?1")
int updateAge(ID id, int age);
@Query("select t.id from #{#entityName} t ")
List<ID> findIds();
}
然後創建一個BaseController
@Slf4j
public class BaseController<R extends BaseRepository<T, ID>, T extends AnimalEntity, ID extends Serializable> {
@Autowired
private R repository;
@ApiOperation(value = "baseAll", httpMethod = "GET")
@GetMapping(value = "/base/all")
public List<T> baseAll() {
log.info("BaseController list");
return repository.findAll();
}
@ApiOperation(value = "update age by id", httpMethod = "GET")
@GetMapping(value = "/update/age/{id}")
public T baseAll(@PathVariable ID id, @RequestParam int age) {
log.info("BaseController list");
repository.updateAge(id, age);
Optional<T> optional = repository.findById(id);
if(optional.isPresent()){
return optional.get();
}
return null;
}
@ApiOperation(value = "base ids", httpMethod = "GET")
@GetMapping(value = "/base/ids")
public List<ID> findIds() {
log.info("BaseController list");
return repository.findIds();
}
}
在分別創建兩個不同的controller
ChapterTenCatController
@RestController
@RequestMapping("/chapter/ten/cat")
public class ChapterTenCatController extends BaseController<CatRepository, CatEntity, Long> {
}
ChapterTenDogController
@RestController
@RequestMapping("/chapter/ten/dog")
public class ChapterTenDogController extends BaseController<DogRepository, DogEntity, Long> {
}
運行代碼之後,查看swagger-ui的頁面
可以看到多了兩個controller
打開這兩個controller,看到裏面的接口是在BaseController裏面寫的
分別運行裏面的接口,可以看到是分別查詢和更新了cat表和dog表的數據
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