注解记录->元注解

学习链接 https://www.cnblogs.com/gmq-sh/p/4798194.html
可以说是非常清楚了。

/**
 * Create by tianci
 * 2019/2/14 10:54
 */
@Service
public class GameServiceImpl implements GameService {

    @Timer
    @Override
    public void doGame() {
        throw new IllegalArgumentException("异常");
    }

    @Target(ElementType.METHOD)
    @Retention(RetentionPolicy.RUNTIME)
    public @interface Timer {
    }
}