我可以在@resouce中使用其他变量名称吗

Question

It might be very basic question but having NPE so want to make sure

do i have to use same resource name for variable or can be different when injected?

@Resource(name='foo')
private X foo;

or can be

@Resource(name='foo')

private X fooxx;

i am using second case where instance name is different from resource name but getting NPE

Answer 1

Comment is correct this should work .... ensure the types are correct but the issue is probably something else. According to Spring docs on @Resource ...

3.9.5 @Resource Spring also supports injection using the JSR-250 @Resource annotation on fields or bean property setter methods. This is a common pattern in Java EE 5 and 6, for example in JSF 1.2 managed beans or JAX-WS 2.0 endpoints. Spring supports this pattern for Spring-managed objects as well.
@Resource takes a name attribute, and by default Spring interprets that value as the bean name to be injected. In other words, it follows by-name semantics, as demonstrated in this example:

public class SimpleMovieLister {

  private MovieFinder movieFinder;

  @Resource(name="myMovieFinder")
  public void setMovieFinder(MovieFinder movieFinder) {
      this.movieFinder = movieFinder;
  }
}

If no name is specified explicitly, the default name is derived from the field name or setter method. In case of a field, it takes the field name; in case of a setter method, it takes the bean property name. So the following example is going to have the bean with name "movieFinder" injected into its setter method: