如何访问Spring Bean名称？

Question

@Named("myUniqueName") 
public class ReportDashboardDao implements DashboardDAO{ 
//STUFF 
}

how can i access the string inside @Named tag when i am injecting DashboardDAO like this :

@Named
public class DshboardDaoConsumer(){

@Inject List<DashboardDAO> dashboardDAO;
//STUFF
} 

Answer 1

Use a Map instead

@Inject 
Map<String, DashboardDao> dashBoardDaos;

This will inject a Map with bean names as keys and daos as values.

Of course, you could also read the annotation value from class instances.

Answer 2

You can't. You're injecting by type. After injection has been done, Spring does not leave behind any relation between the bean's object and the bean's name.

You might want to check out ApplicationContext#getBeanNamesByType() depending on what you want to do.

Answer 3

By implementing BeanNameAware .

@Named("myUniqueName") 
public class ReportDashboardDao implements DashboardDAO, BeanNameAware{ 
      //STUFF 

     private String beanName;

     @Override 
     public Void setBeanName(String beanName) {
        this.beanName = beanName;
     } 

}

So that Spring can inject the beanName into the bean. If you add a public String getBeanName(); in your DashboardDAO interface, DashboardDaoConsumer will be able to obtain it.

In this particular case, Spring will inject the name you specified in the annotation.