java基于AOP生成日志

声明注解

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface SystemLog {
    String businessName();
}

切面类

@Component
@Aspect
@Slf4j
public class LogAspect {
    @Pointcut("@annotation(com.lx.annotation.SystemLog)")
    public void  pt(){

    };
    @Around("pt()")
    public Object printLog(ProceedingJoinPoint joinPoint) throws Throwable{
        Object ret;
        try {
              handleBefore(joinPoint);
             ret = joinPoint.proceed();
             handleAfter(ret);

        }finally {
            // 结束后换行
            log.info("============================End============================================" + System.lineSeparator());
        }

     return ret;
    }

    private void handleBefore(ProceedingJoinPoint joinPoint) {
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = requestAttributes.getRequest();

        SystemLog systemLog = getSystemLog(joinPoint);

        log.info("============================Start==============================================");
        // 打印请求 URL
        log.info("URL            : {}",request.getRequestURL());
        // 打印描述信息
        log.info("BusinessName   : {}", systemLog.businessName());
        // 打印 Http method
        log.info("HTTP Method    : {}", request.getMethod());
        // 打印调用 controller 的全路径以及执行方法
        log.info("Class Method   : {}.{}",joinPoint.getSignature().getDeclaringTypeName(),((MethodSignature) joinPoint.getSignature()).getName());
        // 打印请求的 IP
        log.info("IP             : {}",request.getRemoteHost());
        // 打印请求入参
        log.info("Request Args   : {}", JSON.toJSONString(joinPoint.getArgs()));
    }

    private SystemLog getSystemLog(ProceedingJoinPoint joinPoint) {
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        SystemLog systemLog = methodSignature.getMethod().getAnnotation(SystemLog.class);
        return systemLog;
    }

    private void handleAfter(Object ret) {
        // 打印出参
        log.info("Response       : {}", JSON.toJSONString(ret));
    }
}