gin中自定义Time类型的JSON字段格式

想让go返回的时间是"YYYY-MM-DD HH:ii:ss"的格式，但是他始终返回为2006-01-02T15:04:05Z07:00。

查看源代码后发现，go的时间format里面封装了下面这些时间格式

const (
	ANSIC       = "Mon Jan _2 15:04:05 2006"
	UnixDate    = "Mon Jan _2 15:04:05 MST 2006"
	RubyDate    = "Mon Jan 02 15:04:05 -0700 2006"
	RFC822      = "02 Jan 06 15:04 MST"
	RFC822Z     = "02 Jan 06 15:04 -0700" // RFC822 with numeric zone
	RFC850      = "Monday, 02-Jan-06 15:04:05 MST"
	RFC1123     = "Mon, 02 Jan 2006 15:04:05 MST"
	RFC1123Z    = "Mon, 02 Jan 2006 15:04:05 -0700" // RFC1123 with numeric zone
	RFC3339     = "2006-01-02T15:04:05Z07:00"
	RFC3339Nano = "2006-01-02T15:04:05.999999999Z07:00"
	Kitchen     = "3:04PM"
	// Handy time stamps.
	Stamp      = "Jan _2 15:04:05"
	StampMilli = "Jan _2 15:04:05.000"
	StampMicro = "Jan _2 15:04:05.000000"
	StampNano  = "Jan _2 15:04:05.000000000"
)

没有发现我需要的时间格式，始终返回RFC3339格式的2006-01-02T15:04:05Z07:00格式

查看了json对于时间的格式化方法，实现下面的接口

// JSONTime format json time field by myself
type JSONTime struct {
	time.Time
}

// MarshalJSON on JSONTime format Time field with %Y-%m-%d %H:%M:%S
func (t JSONTime) MarshalJSON() ([]byte, error) {
	formatted := fmt.Sprintf("\"%s\"", t.Format("2006-01-02 15:04:05"))
	return []byte(formatted), nil
}

// Value insert timestamp into mysql need this function.
func (t JSONTime) Value() (driver.Value, error) {
	var zeroTime time.Time
	if t.Time.UnixNano() == zeroTime.UnixNano() {
		return nil, nil
	}
	return t.Time, nil
}

// Scan valueof time.Time
func (t *JSONTime) Scan(v interface{}) error {
	value, ok := v.(time.Time)
	if ok {
		*t = JSONTime{Time: value}
		return nil
	}
	return fmt.Errorf("can not convert %v to timestamp", v)
}