Java 这是在guice中使用自定义注释的正确方法吗？

嗨，我在guice中有一个自定义注释

@BindingAnnotation
@Retention(RetentionPolicy.RUNTIME)
@Target({TYPE})
public @interface Worker {
    String value();
}

现在，如果

bind(Base.class)
    .annotatedWith(Test1.class.getAnnotation(Worker.class))
    .to(Test1.class);

bind(Base.class)
    .annotatedWith(Test2.class.getAnnotation(Worker.class))
    .to(Tes2.class);

如果我尝试从喷油器中获取相应的实例，比如

injector.getInstance(Key.get(Worker.class, new WorkerImpl("worker1")));
injector.getInstance(Key.get(Worker.class, new WorkerImpl("worker2")));

这些会给我worker1和worker2的例子吗

---

我不确定这是否是正确的方法。

如果您有自定义注释，您应该正确地实现它

例如，您有

@Worker

注释，但

WorkerImpl

实现了

@Named

。你应该让它实现

@Worker

现在，您的绑定应该如下所示：

bind(Base.class)
  .annotatedWith(new WorkerImpl("worker1"))
  .to(Test1.class);
bind(Base.class)
  .annotatedWith(new WorkerImpl("worker2"))
  .to(Test2.class);

您将得到如下实例：

Base test1 = injector.getInstance(Key.get(Base.class, new WorkerImpl("worker1")));
Base test2 = injector.getInstance(Key.get(Base.class, new WorkerImpl("worker2")));

对于其余部分，您可以正确处理注释hashCode，这是创建自定义注释实现的最困难部分

bind(Base.class)
  .annotatedWith(new WorkerImpl("worker1"))
  .to(Test1.class);
bind(Base.class)
  .annotatedWith(new WorkerImpl("worker2"))
  .to(Test2.class);

Base test1 = injector.getInstance(Key.get(Base.class, new WorkerImpl("worker1")));
Base test2 = injector.getInstance(Key.get(Base.class, new WorkerImpl("worker2")));