springboot使用注解方式打印方法日志，可以很方便的打印日志，通用性很强。耦合很低，很好。

作为程序员的我不废话，咱们直接上代码

先创建个注解

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface ShowLog {
    /**
     * 日志描述
     */
    String value();

    /**
     * 是否开启日志打印，默认true-开启
     */
    boolean enabled() default true;

    /**
     * 是否打印请求参数
     */
    boolean showArgs() default true;

    /**
     * 是否打印返回值
     */
    boolean showResult() default true;

    /**
     * 是否打印耗时
     */
    boolean showTime() default true;
}

利用spring的aop功能，整个环绕通知

@Slf4j
@Aspect
@Component
public class ShowLogHandler {

    @Around("@annotation(showLog)")
    public Object handle(ProceedingJoinPoint joinPoint, ShowLog showLog) throws Throwable {
        if (!showLog.enabled()) {
            return joinPoint.proceed();
        }
        boolean isSuccess = true;
        long startTime = 0;
        String desc = showLog.value();
        String uuid = UUID.randomUUID().toString();
        log.info(">>[{}]打印日志[{}]", uuid, desc);

        try {
            if (showLog.showTime()) {
                startTime = System.currentTimeMillis();
            }
            if (showLog.showArgs()) {
                String args = JsonUtil.getJsonStringOrNull(joinPoint.getArgs());
                log.info(">>[{}][{}]参数[{}]", uuid, desc, args);
            }
            Object result = joinPoint.proceed();
            if (showLog.showResult()) {
                log.info("<<[{}][{}]方法返回值:[{}]", uuid, desc, JsonUtil.getJsonStringOrNull(result));
            }
            return result;
        } catch (Throwable e) {
            isSuccess = false;
            log.error("<<[{}][{}]方法出错:[{}]", uuid, desc, e.getMessage());
            throw e;
        } finally {
            if (showLog.showTime()) {
                long endTime = System.currentTimeMillis();
                log.info("<<[{}][{}]方法耗时[{}]毫秒,[{}]", uuid, desc, endTime - startTime, isSuccess);
            }
        }

    }

}