Golang 利用反射对结构体优雅排序的操作方法

func reflectCmp(i, j interface{}, fieldName string) bool {  //按传入fieldName 排序
	valI := reflect.ValueOf(i).FieldByName(fieldName).Interface()
	valJ := reflect.ValueOf(j).FieldByName(fieldName).Interface()
	switch s := valI.(type) {
	case string:
		return s < valJ.(string)
	case float64:
		return s < valJ.(float64)
	case int:
		return s < valJ.(int)
	default:
		fmt.Println("The type is unknown")
	}
	return true
}

type person struct {
	Age int
	Name string
}

func main() {
	pSlice := []person{{20,"a"},{15,"be"},{32,"cc"},{2,"aa"}}
	var p person
	typeOfA := reflect.TypeOf(p)
 
	// 遍历结构体所有成员
	for i := 0; i < typeOfA.NumField(); i++ {
		// 获取每个成员的结构体字段类型
		fieldType := typeOfA.Field(i)
		sort.Slice(pSlice,func(i, j int) bool {
			return reflectCmp(pSlice[i],pSlice[j],fieldType.Name)
		})
		fmt.Println(pSlice)
	}
}