在一个类字段中处理一个 Spring bean/接口的多个实现

与此类似question https://stackoverflow.com/questions/11777079/handling-several-implementations-of-one-spring-bean-interface，但我有这种情况。假设我有一个AccountService接口和两个实现：DefaultAccountServiceImpl and SpecializedAccountServiceImpl,（这些类就像前面的question https://stackoverflow.com/questions/11777079/handling-several-implementations-of-one-spring-bean-interface）。实现在一个类中，但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
        ...
    }
}

Use @Qualifier("beanName")

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

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