spring aop记录

使用：

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class LoggingAspect {

    @Before("execution(* com.example.service.*.*(..))")
    public void logBefore(JoinPoint joinPoint) {
        System.out.println("Before executing: " + joinPoint.getSignature());
    }

    @After("execution(* com.example.service.*.*(..))")
    public void logAfter(JoinPoint joinPoint) {
        System.out.println("After executing: " + joinPoint.getSignature());
    }
}

• execution(* com.example.service.*.*(..))：匹配 com.example.service 包下的所有类的所有方法。
• execution(public * *(..))：匹配所有公共方法。

import org.springframework.stereotype.Service;

@Service
public class UserService {

    public void addUser(String name) {
        System.out.println("Adding user: " + name);
    }

    public void deleteUser(String name) {
        System.out.println("Deleting user: " + name);
    }
}

aop实现原理即是动态代理技术