AOP

[toc]

创建切面方式一：

@Aspect
@Component
public class HttpAspect {
    
    
   @Before("execution(public * com.example.HelloController.*(..))")
   public void logBefore() {
       System.out.print("logBefore");
   }
    
    
   @After("execution(public * com.example.HelloController.*(..))")
   public void logAfter() {
       System.out.print("logAfter");
   }
}

创建切面方式二：(抽取切点出来，减少重复代码)

@Aspect
@Component
public class HttpAspect {
    
   @Pointcut("execution(public * com.example.HelloController.*(..))")
   public void log() {
    
   }
    
   @Before("log()")
   public void logBefore() {
       System.out.print("logBefore");
   }
    
    
   @After("log()")
   public void logAfter() {
       System.out.print("logAfter");
   }
}

@Aspect
@Component
public class HttpAspect {

    public static Logger logger = LoggerFactory.getLogger(HttpAspect.class);

    @Pointcut("execution(public * com.example.HelloController.*(..))")
    public void log() {

    }

    @Before("log()")
    public void logBefore(JoinPoint joinPoint) {
        logger.info("logBefore");
        ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = servletRequestAttributes.getRequest();
        logger.info("url={}", request.getRequestURL());
        logger.info("method={}", request.getMethod());
        logger.info("ip={}", request.getRemoteAddr());
        logger.info("class.method={}", joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());
        logger.info("args={}", joinPoint.getArgs());
    }


    @After("log()")
    public void logAfter() {
        logger.info("logAfter");
    }

    @AfterReturning(returning = "object", pointcut = "log()")
    public void logAfterReturning(Object object) {
        logger.info("response={}", object.toString());
    }
}


输出日志：

logBefore
url=http://localhost:8080/updatePerson
method=PUT
ip=0:0:0:0:0:0:0:1
class.method=com.example.HelloController.updatePerson
args=10
m person person0_ where person0_.id=?
logAfter
response=com.example.Person@34b98c82