修改公式和计算帮助类

yzg-util-mq/src/main/java/com/yanzuoguang/mq/plan/YzgMqProcedure.java

@@ -83,9 +83,13 @@ public class YzgMqProcedure implements InitializingBean {
      * @return
      */
     private TimeUnit getTimeUnit(long waitTime) {
+        TimeUnit prevUnit = YZG_MQ_SYSTEM_QUEUE_PLAN_TIME[0];
         for (TimeUnit timeUnit : YZG_MQ_SYSTEM_QUEUE_PLAN_TIME) {
             // 在时间范围内，则返回大于等待时间的队列
             if (timeUnit.unit >= waitTime) {
+                if (Math.abs(waitTime - prevUnit.unit) < Math.abs(timeUnit.unit - waitTime)) {
+                    return prevUnit;
+                }
                 return timeUnit;
             }
         }