https://godoc.org/gopkg.in/go-playground/validator.v10

验证器的试用列子

type Topic2 struct {
   TopicId int `json:"topic_id" `   
   TopicTitle string `json:"topic_title" form:"topic_title" binding:"min=4,max=20"`   //4-20
   TopicShortTitle string `json:"stitle" binding:"required,nefield=TopicTitle"`         //值不能等于 TopicTitle字段的值
   UserIp int `json:"ip" binding:"ip"`                                                    // 必须是ip
   TopicScore int `json:"score" binding:"gt=10"`                                        // 必须大于10
}