Spring AOP切点表达式使用及说明

execution(public * *(..))

execution(* set*(..))

拦截AccountService(类、接口)中定义的所有方法
execution(* com.xyz.service.AccountService.*(..))

拦截com.xyz.service包中所有类中任意方法，**不包含**子包中的类
execution(* com.xyz.service.*.*(..))

拦截com.xyz.service包或者子包中定义的所有方法
execution(* com.xyz.service..*.*(..))

拦截service包中任意类的任意方法
within(com.xyz.service.*)

拦截service包及子包中任意类的任意方法
within(com.xyz.service..*)

目标对象使用aop之后生成的代理对象必须是指定的类型才会被拦截，注意是目标对象被代理之后生成的代理对象和指定的类型匹配才会被拦截
this(com.xyz.service.AccountService)

package com.ms.aop.jthis.demo1;
​
public interface IService {
    void m1();
}

package com.ms.aop.jthis.demo1;
​
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
​
@Slf4j
@Component
public class ServiceImpl implements IService {
    @Override
    public void m1() {
        log.info("切入点this测试！");
    }
}

package com.ms.aop.jthis.demo1;
​
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
@Aspect
@Component
@Slf4j
public class Interceptor1 {
​
    @Pointcut("this(com.ms.aop.jthis.demo1.ServiceImpl)")
    public void pointcut() {
    }
​
    @Around("pointcut()")
    public Object invoke(ProceedingJoinPoint invocation) throws Throwable {
        log.info("方法执行之前");
        Object result = invocation.proceed();
        log.info("方法执行完毕");
        return result;
    }
}

package com.ms.aop.jthis.demo1;
​
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
​
@ComponentScan(basePackageClasses = {Client.class})
@EnableAspectJAutoProxy
@Slf4j
public class Client {
    public static void main(String[] args) {
        AnnotationConfigApplicationContext annotationConfigApplicationContext = new AnnotationConfigApplicationContext(Client.class);
        IService service = annotationConfigApplicationContext.getBean(IService.class);
        service.m1();
        log.info("{}", service instanceof ServiceImpl);
    }
}

@EnableAspectJAutoProxy(proxyTargetClass = true)
proxyTargetClass=true表示强制使用cglib来生成代理对象

target(com.xyz.service.AccountService)
目标对象为AccountService类型的会被代理

匹配只有一个参数，且类型为
com.ms.aop.args.demo1.UserModel@Pointcut("args(com.ms.aop.args.demo1.UserModel)")

- 匹配多个参数
args(type1,type2,typeN)

匹配第一个参数类型为com.ms.aop.args.demo1.UserModel的所有方法, .. 表示任意个参数
@Pointcut("args(com.ms.aop.args.demo1.UserModel,..)")

目标对象中包含com.ms.aop.jtarget.Annotation1注解，调用该目标对象的任意方法都会被拦截
@target(com.ms.aop.jtarget.Annotation1)

声明有com.ms.aop.jwithin.Annotation1注解的类中的所有方法都会被拦截
​​​​​​​@within(com.ms.aop.jwithin.Annotation1)

@annotation(com.ms.aop.jannotation.demo2.Annotation1)

@Pointcut("@target(org.springframework.stereotype.Repository)")
public void repositoryMethods() {}

@Pointcut("execution(* *..create*(Long,..))")
public void firstLongParamMethods() {}

@Pointcut("repositoryMethods() && firstLongParamMethods()")
public void entityCreationMethods() {}