spring Aop 中 Advice,PointCut, Advisor和Advised关系
- Advice: 增强, 如BeforeAdvice, AfterAdvice…
- Advisor表示增强定义，由 Advice和PointCut组成
- Advised 管理 Advisor
使用 spring Aop 定义增强
使用 spring Aop 定义增强,而不是用 AspectJ
@Slf4j
public class LogAdvice implements MethodBeforeAdvice {@Overridepublic void before(Method method, Object[] args, Object target) throws Throwable {log.info("before method: {}", method.getName());}
}@Configuration
public class SpringAopConfig {@Beanpublic LogAdvice logAdvice() {return new LogAdvice();}@Beanpublic Advisor logAdvisor() {NameMatchMethodPointcut nameMatchMethodPointcut = new NameMatchMethodPointcut();nameMatchMethodPointcut.addMethodName("ping");return new DefaultPointcutAdvisor(nameMatchMethodPointcut, logAdvice());}
}
结果:
INFO 104836 --- [nio-8080-exec-3] com.proxy.sample.LogAdvice : before method: ping
使用 AspectJ 实现AOP
@Component
@Aspect
@Slf4j
public class LogAspect {@Pointcut("execution(* com.controller.HealthController.*(..))")public void pc() {}@Before("pc()")public void log(JoinPoint joinPoint) {MethodSignature signature = (MethodSignature) joinPoint.getSignature();log.info("before method: {}", signature.getName());}
}
结果:
INFO 96524 --- [nio-8080-exec-1] com.proxy.sample.LogAspect : before method: ping
AspectJ 和 Spring Aop区别
- 都可以实现AOP 增强
- AspectJ是在编译期
- Spring Aop则是运行时，动态创建，性能要稍微差点
- AspectJ 使用范围更广，不依赖spring, 而spring Aop则与spring 绑定
