Merge pull request 'grmi的Date和DateTime类型添加ToString方法' (#30) from feature_grmi into develop

Reviewed-on: http://101.201.121.115:3000/leo/LAPP_GAAS_GFrame_BACKEND/pulls/30
Reviewed-by: weichenglei <chenglei.wei@le-it.com.cn>

grmi/Date.go

@@ -30,3 +30,8 @@ func (self *Date) UnmarshalJSON(data []byte) error {
 func (self *Date) Restore() time.Time {
 	return time.Time(*self)
 }
+
+func (self *Date) ToString() string {
+	date := self.Restore()
+	return date.Format(DateOutFormat)
+}

grmi/DateTime.go

@@ -30,3 +30,8 @@ func (self *DateTime) UnmarshalJSON(data []byte) error {
 func (self *DateTime) Restore() time.Time {
 	return time.Time(*self)
 }
+
+func (self *DateTime) ToString() string {
+	date := self.Restore()
+	return date.Format(DatetimeOutFormat)
+}

grmi/grmi.go

@@ -16,6 +16,8 @@ type GoType int
 const (
 	URLDateTimeFormat = "20060102150405"
 	URLDateFormat     = "20060102"
+	DateOutFormat     = "2006-01-02"
+	DatetimeOutFormat = "2006-01-02 15:04:05"
 )
 
 const (