Java框架 --- Spring AOP原理

冷不防 2022-02-02 06:55 230阅读 0赞

Spring AOP原理

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1.  package com.imooc.framework.aop;
2.   
3.  import org.aopalliance.intercept.Joinpoint;
4.  import org.aspectj.lang.JoinPoint;
5.  import org.aspectj.lang.annotation.AfterReturning;
6.  import org.aspectj.lang.annotation.Aspect;
7.  import org.aspectj.lang.annotation.Before;
8.  import org.aspectj.lang.annotation.Pointcut;
9.  import org.slf4j.Logger;
10. import org.slf4j.LoggerFactory;
11. import org.springframework.stereotype.Component;
12. import org.springframework.web.context.request.RequestContextHolder;
13. import org.springframework.web.context.request.ServletRequestAttributes;
14.  
15. import javax.servlet.http.HttpServletRequest;
16.  
17. @Aspect
18. @Component
19. public class RequestLogAspect \{
20. private static final Logger logger =
21. LoggerFactory.getLogger(RequestLogAspect.class);
22. @Pointcut("execution(public \* com.imooc.framework.web..\*.\*(..))")
23. public void webLog()\{\}
24.  
25. @Before("webLog()")
26. public void doBefore(JoinPoint joinPoint)\{
27. // 接收到请求，记录请求内容
28. ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
29. HttpServletRequest request = attributes.getRequest();
30. // 记录下请求内容
31. logger.info("URL : " + request.getRequestURL().toString());
32. logger.info("IP : " + request.getRemoteAddr());
33.  
34. \}
35.  
36. @AfterReturning(returning = "ret", pointcut = "webLog()")
37. public void doAfterReturning(Object ret) \{
38. // 处理完请求，返回内容
39. logger.info("RESPONSE : " + ret);
40. \}
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