我是否可以通过默认方式为特定的json.Encoder设置omtempty或在全局配置中进行回退？

like

type User struct {
    ID       int32     `json:"_id"` 
    Week     string    `json:"week"`         
}

json.Marshal(&User{},true)//omitempty is true

will return

{}

is bson,yaml,sql or any other library support this feature?