Question

如何从线程访问exampleService？在新线程中为null。 ExampleService是带注释的@Service类。 SessionFactory我是从dao设置的，它不是null。

public class ExampleInterceptor extends EmptyInterceptor {

    private Logger logger = Logger.getLogger(getClass());

    private static final long serialVersionUID = 1L;

    @Autowired
    SessionFactory sessionFactory;

    @Autowired
    ExampleService exampleService;

    public void setExampleService(ExampleService exampleService) {
        this.exampleService = exampleService;
    }

    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    public void afterTransactionCompletion(Transaction tx) {
        new Thread(new SimpleThread(exampleService)).start();
    }

    protected class SimpleThread implements Runnable {
    protected ExampleService exampleService;

        public SimpleThread() {
        };
        public SimpleThread(ExampleService exampleService) {
      this.exampleService = exampleService;
        }
        @Override
        public void run() {
                    exampleService.method(); // is null at this location                        
        }

    }

}

Answer 1

您需要使用@Service注释服务类，并且要使用该对象，您需要自动装配它。如果我没有错，请在你的＆＃34; SimpleThread＆＃34;上课时，您使用的不是自动装配物业＆＃34; protected ExampleService exampleService＆＃34;，它没有@Autowired注释。 @Service, @Controller, @Repository & @Component

自动装配的bean在线程位置为空

1 个答案: