生命不可能有两次，但许多人连一次也不善于度过------吕凯特

我们写一个注解用AOP去实现接口的访问记录，这个也可以用于日志记录等地方

|------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | hljs java import java.lang.annotation.*; /** * 记录 * * @author <achao1441470436@gmail.com> * @since 2021/7/29 11:28 */ @Inherited @Documented @Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public @interface WithMe { String value(); } |

然后在AOP中这样写

|---------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | hljs java import lombok.extern.slf4j.Slf4j; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.annotation.AfterReturning; import org.aspectj.lang.annotation.Aspect; import org.springframework.stereotype.Component; /** * 记录 * * @author <achao1441470436@gmail.com> * @since 2021/7/29 11:00 */ @Slf4j @Aspect @Component public class WithMeAop { /** * 记录 * * @param point 切面 * @param withMe 注解 * @return java.lang.Object * @author <achao1441470436@gmail.com> * @since 2021/7/29 12:13 */ @AfterReturning(pointcut = "@annotation(withMe)", returning = "returnValue") public Object recordWithMe(JoinPoint point, WithMe withMe, Object returnValue) { // 获取注解内value的值 withMe.value() // 做处理... return returnValue; } } |

这样，当你的方法上有@WithMe注解时，就会被AOP织入