java - 在一个类字段中处理一个 Spring bean/接口(interface)的多个实现

Question

类似于此question ，但我有这种情况。假设我有一个 AccountService 接口(interface)和两个实现:DefaultAccountServiceImpl 和 SpecializedAccountServiceImpl，(类就像前面的 question 一样)。实现在一个类中，但是对于不同的方法有不同的 bean 实现。说:

@RestController
@RequestMapping("/account")
public class AccountManagerRestController {

    @Autowired
    private AccountService service;

    @RequestMapping(value = "/register", method = RequestMethod.POST)
    HttpEntity<?> registerAccount(@RequestBody AccountRegisterRequestBody input) {
        // here the `service` is DefaultAccountServiceImpl
        ...
    }


    @RequestMapping(value = "/register/specialized", method = RequestMethod.POST)
    HttpEntity<?> registerSpecializedAccount(@RequestBody AccountRegisterRequestBody input) {
        // here the `service` is SpecializedAccountServiceImpl
        ...
    }
}

Answer 1

使用@Qualifier("beanName")

@Autowired @Qualifier("service1")
private AccountService service1;

@Autowired @Qualifier("service2")
private AccountService service2;