如何在春季使用单个@Bean注释方法（或类似方法）注册多个bean？

java spring spring-java-config

2022-09-03 07:55:47

我有一个类似于以下内容的类：

@Configuration
public class ApplicationConfiguration {

    private <T> T createService(Class<T> serviceInterface) {
        // implementation omitted
    }

    @Bean
    public FooService fooService() {
        return createService(FooService.class);
    }

    @Bean
    public BarService barService() {
        return createService(BarService.class);
    }

    ...

}

问题在于，有太多的@Bean注释的方法，它们仅在名称、返回类型和方法调用参数方面有所不同。我想使这个类类似于以下内容：crateService

@Configuration
public class ApplicationConfiguration {

    private static final Class<?>[] SERVICE_INTERFACES = {
            FooSerivce.class, BarService.class, ...};


    private <T> T createService(Class<T> serviceInterface) {
        // implementation omitted
    }

    @Beans // whatever
    public Map<String, Object> serviceBeans() {
        Map<String, Object> result = ...
        for (Class<?> serviceInterface : SERVICE_INTERFACES) {
            result.put(/* calculated bean name */,
                    createService(serviceInterface));
        }
        return result;
    }

}

春天有可能吗？

答案 1

@Configuration
public class ApplicationConfiguration {

    @Autowired
    private ConfigurableBeanFactory beanFactory;

    @PostConstruct
    public void registerServices() {
        beanFactory.registerSingleton("service...", new NNNService());
        ... 
    }
}

答案 2