java - Guice:使用@Named 注入(inject)映射绑定(bind)

Question

我想要以下注入(inject)模型。 Guice 可以做到这一点吗？

模块:

protected void configure() {
    MapBinder<String, IService> mapBinder = MapBinder.newMapBinder(binder(), String.class, IService.class);
    mapBinder.addBinding("keyA").to(IServiceA.class);
    mapBinder.addBinding("keyB").to(IserviceB.class);
}

类:

class SomeClass {
    private final IService service;

    @Inject
    SomeClass(@Named("KeyA") final IService serviceInstance) {
        this.service = serviceInstance;
    }
}

Answer 1

@Named 注释必须添加到方法的参数上。

class SomeClass {
    private final IService service;

    @Inject
    SomeClass(@Named("KeyA") final IService serviceInstance) {
        this.service = serviceInstance;
    }
}

https://github.com/google/guice/wiki/Injections#method-injection