Spring: Attaching @Qualifer to Java-configured beans

问题

In spring, you can XML-configure a bean to have a qualifier. I can't seem to find how I can attach a qualifier if configuring beans through Java annotations. What's up with that? Do I have to use just plain old names?

回答1:

If you're using annotations (not Java based configuration), you can use the following to add a qualifier (see the Spring documentation):

@Component
@Qualifier("myQualifier")
public class MyBean {
    //code
}

And to wire in the bean, use the following (again, see the Spring documentation):

public class MyClass {

    @Autowired
    @Qualifier("myQualifier")
    private MyBean myBean;

    //more code

}

回答2:

What, like @Qualifier, you mean?

3.10.4 Defining bean metadata within components

Example:

  @Bean @Qualifier("public")
  public TestBean publicInstance() {
      return new TestBean("publicInstance");
  }

来源：https://stackoverflow.com/questions/9182805/spring-attaching-qualifer-to-java-configured-beans