diff --git a/const.go b/const.go
index efa5695..1b73ae7 100644
--- a/const.go
+++ b/const.go
@@ -3,6 +3,7 @@ package hotime
 const (
 	LOG_FMT = 0
 	LOG_NIL = 1
+	LOG_FILE=2
 )
 
 //锁关键字
diff --git a/error.go b/error.go
index 2866d9b..c37fae9 100644
--- a/error.go
+++ b/error.go
@@ -31,6 +31,9 @@ func(this *Error)SetError(err error,loglevel ...int){
 		if lev==LOG_FMT{
 			fmt.Println(err)
 		}
+		if lev==LOG_FILE{
+			fmt.Println(err)
+		}
 		this.err=err
 		return nil
 	})
diff --git a/objtoobj.go b/objtoobj.go
index ae2da10..1753924 100644
--- a/objtoobj.go
+++ b/objtoobj.go
@@ -269,7 +269,7 @@ func StrToSlice(string string) Slice {
 //字符串数组: a1,a2,a3转["a1","a2","a3"]
 func StrArrayToJsonStr(a string) string {
 
-	if len(a) != 0 {
+	if len(a) > 2 {
 		if a[0] == ',' {
 			a = Substr(a, 1, len(a)-1)
 		}