AOP统一处理请求日志

面向切面 （AOP）aspect oriented programming

将通用逻辑从业务逻辑中分离出来

1. 创建 ```java package com.example.luckymoney.aspect;

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

@Aspect @Component public class HttpAspect {

@Before("execution(public * com.example.luckymoney.controller.LuckymoneyController.*(..))")
public void logBefore() {
    System.out.println("11111");
}
@After("execution(public * com.example.luckymoney.controller.LuckymoneyController.*(..))")
public void logAfter() {
    System.out.println("22222");
}

}

2. 改进
```java
package com.example.luckymoney.aspect;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
@Aspect
@Component
public class HttpAspect {
    @Pointcut("execution(public * com.example.luckymoney.controller.LuckymoneyController.*(..))")
    public void log() {
    }
    @Before("log()")
    public void logBefore() {
        System.out.println("11111");
    }
    @After("log()")
    public void logAfter() {
        System.out.println("22222");
    }
}