为Spring AOP注释创建Pointcut，以便将注释放在类上，并对类中的每个方法执行建议

Question

我想在类级别上有注释，将执行注释类中的每个方法的建议。这可能吗。

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface DoSomethingForMe {
}

@Aspect
@Component
public class DoSomethingForMeAdvice {

    private static final Logger logger = LoggerFactory.getLogger(DoSomethingForMeAdvice.class);

    @Pointcut("execution(public * *(..)) && @annotation(DoSomethingForMe)")
    public void anyAnnotatedMethod() {
    }

    @Before("anyAnnotatedMethod()")
    public void acquireExecution() {
        logger.info("look at me");
    }
}

@Service
@DoSomethingForMe
public class OmniDemoService {

    private static final Logger logger = LoggerFactory.getLogger(OmniDemoService.class);

    public void method1() {
            logger.info("---1---");
    }
    
    public void method2() {
            logger.info("---2---");
    }
}

Answer 1

您的问题是您混淆了切入点定义和建议。

切入点是目标，建议执行实际的WhateveryouwanttobeExecut。比如

@Pointcut("@annotation(com.omnidemo.advice.DoSomethingForMe)")
public void anyAnnotatedMethod() {
}


@Before("anyAnnotatedMethod()")
public void logMethodCall(JoinPoint jp) {
    String methodName = jp.getSignature().toShortString();
    logger.info("Executing: " + methodName);
}