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AOP 面向切面 @Aspect 注解

logycoconut2023年8月3日小于 1 分钟SpringAOPAspect

@Pointcut 切面表达式的几种写法

只列我使用多的

通配符表达式

execution

@AfterReturning(pointcut="execution(* co.logycoconut.java.cheat.web.*.*(..))", returning = "result")

@annotation

@AfterReturning(pointcut = "@annotation(controllerLog)", returning = "result")

切面表达式的参数匹配

Spring AOP 还提供了 AspectJ 的表达式语法,可以通过 argNames 直接获取注解参数

下列代码展示了两种不同的方式来获取注解上的信息

@Slf4j
@Aspect
@Component
public class LogAspect {

    @Before(value = "@annotation(co.logycoconut.java.cheat.annotation.Log)")
    public void doAfterReturning(JoinPoint joinPoint) {
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        Method method = methodSignature.getMethod();
        Log logAnno = method.getAnnotation(Log.class);

        log.info("before, title:{}", logAnno.title());
    }

    @AfterReturning(pointcut = "@annotation(controllerLog)", returning = "result")
    public void doAfterReturning(JoinPoint joinPoint, Log controllerLog, Object result) {
        log.info("after, title:{}", controllerLog.title());
        log.info("after, result:{}", result);
    }

}

参考链接