两个类实现统同一个接口的同一个方法时的注解使用及bean配置

xml配置
代码：
@Service
public class AaaService implements IChangePassword {
@Override
public void changePassword(String username, String password) {
}
}
@Service
public class BbbService implements IChangePassword {
@Override
public void changePassword(String username, String password) {
}
}
//第一种
public class AccountController extends BaseController {
@Autowired
@Qualifier("aaaService")
private IChangePassword aaaService;
@Autowired
@Qualifier("bbbService")
private IChangePassword bbbService; }
//第二种
1. public class AccountController2 extends BaseController {
2. @Resource("aaaService")
3. private IChangePassword aaaService;
@Resource("bbbService")
private IChangePassword bbbService; }