go 结构体转map string类型

// ToMapString 结构体转为Map[string]string
func ToMapString(in interface{}, tagName string) map[string]string {
	out := make(map[string]string)
	v := reflect.ValueOf(in)
	if v.Kind() == reflect.Ptr {
		v = v.Elem()
	}
	if v.Kind() != reflect.Struct { // 非结构体返回错误提示
		return nil
	}
	t := v.Type()
	for i := 0; i < v.NumField(); i++ { // 遍历结构体字段
		fi := t.Field(i)
		tagValue := fi.Tag.Get(tagName) //获取标签里面的值 例如`form:"page"` 则获取到form里面的值 page
		if tagValue != "" {
			switch fi.Type.String() {
			case "Int", "Int8", "Int16", "Int32", "Int64":
				out[tagValue] = fmt.Sprintf("%d", v.Field(i).Int())
			case "Float32", "Float64":
				out[tagValue] = fmt.Sprintf("%f", v.Field(i).Float())
			case "String":
				out[tagValue] = v.Field(i).String()
			case "Bool":
				out[tagValue] = fmt.Sprintf("%v", v.Field(i).Bool())
			default:
				out[tagValue] = fmt.Sprintf("%v", v.Field(i).Interface())
			}
		}
	}
	return out
}

测试实例

type SearchRequest struct {
	Page int64  `form:"page,default=1"`
	Q    string `form:"q,optional"` //可选参数
	Size int64  `form:"size,default=10"`
}
{
	name: "fuck",
	args: args{
		in: &SearchRequest{
			Page: 60,
			Q:    "133",
			Size: 1,
		},
		tagName: "form",
	},
},