java - 如何从 Guice 的注入(inject)器中检索带注释的实例？

Question

假设我有一个模块:

Module extends AbstractModule
{
  @Override
  protected void configure()
  {
    bind(String.class).
      annotatedWith(Names.named("annotation")).
        toInstance("DELIRIOUS");
  }
}

我想测试模块并检查它是否在 String 字段中注入(inject)了正确的值，该字段用 Names.named("annotation") 进行了注释，但没有类和一个字段，但直接从注入(inject)器获取值:

@Test
public void test()
{
  Injector injector = Guice.createInjector(new Module());

  // THIS IS NOT GOING TO WORK!
  String delirious = injector.getInstance(String.class); 

  assertThat(delirious, IsEqual.equalTo("DELIRIOUS");
}

Answer 1

injector.getInstance(Key.get(String.class, Names.named("annotation")));