更换方法 time.Abs

 package xtime
 
-import "time"
+import (
+	"math"
+	"time"
+)
 
 // 当天的末尾时间, 例 2006-01-02 23:59:59
 func DayEndTime(t time.Time) time.Time {
@@ -22,6 +25,6 @@ func SubDayAbs(t1, t2 time.Time) int {
 	day2 := DayZeroTime(t2)
 
 	t3 := day1.Sub(day2)
-	h := int(t3.Abs().Hours())
+	h := int(math.Abs(t3.Hours()))
 	return (h / 24) + 1
 }