@Resource
按名称注入
@Autowired
按类型注入
@RequiredArgsConstructor和private final TestService testService
按类型注入,不允许服务之间循环依赖
如:
TestServiceImpl
TestServiceImpl2
若:
TestServiceImpl里面写了: private final TestService2 testService2那么,在TestServiceImpl2就不能再写: private final TestService testService
解决方法:
@RequiredArgsConstructor(onConstructor = @__(@Autowired))
或改用@Resource或@Autowired
