go 类型转换

package xutil

import (
	"fmt"
	"strconv"
	"strings"
)

//String change val type to string
func String(val interface{}) string {
	if val == nil {
		return ""
	}

	switch t := val.(type) {
	case bool:
		return strconv.FormatBool(t)
	case int:
		return strconv.FormatInt(int64(t), 10)
	case int8:
		return strconv.FormatInt(int64(t), 10)
	case int16:
		return strconv.FormatInt(int64(t), 10)
	case int32:
		return strconv.FormatInt(int64(t), 10)
	case int64:
		return strconv.FormatInt(t, 10)
	case uint:
		return strconv.FormatUint(uint64(t), 10)
	case uint8:
		return strconv.FormatUint(uint64(t), 10)
	case uint16:
		return strconv.FormatUint(uint64(t), 10)
	case uint32:
		return strconv.FormatUint(uint64(t), 10)
	case uint64:
		return strconv.FormatUint(t, 10)
	case float32:
		return strconv.FormatFloat(float64(t), 'f', -1, 32)
	case float64:
		return strconv.FormatFloat(t, 'f', -1, 64)
	case []byte:
		return string(t)
	case string:
		return t
	default:
		return fmt.Sprintf("%v", val)
	}
}

//Int64 change val type to int64
func Int64(val interface{}) int64 {
	if val == nil {
		return 0
	}

	switch t := val.(type) {
	case bool:
		if t {
			return int64(1)
		}
		return int64(0)
	case int:
		return int64(t)
	case int8:
		return int64(t)
	case int16:
		return int64(t)
	case int32:
		return int64(t)
	case int64:
		return int64(t)
	case uint:
		return int64(t)
	case uint8:
		return int64(t)
	case uint16:
		return int64(t)
	case uint32:
		return int64(t)
	case uint64:
		return int64(t)
	case float32:
		return int64(t)
	case float64:
		return int64(t)
	case []byte:
		i, _ := strconv.Atoi(string(t))
		return int64(i)
	case string:
		i, _ := strconv.ParseFloat(t, 64)
		return int64(i)
	default:
		i, _ := strconv.ParseFloat((fmt.Sprintf("%v", t)), 64)
		return int64(i)
	}
}

//Float64 change val type to float64
func Float64(val interface{}) float64 {
	if val == nil {
		return float64(0)
	}

	switch t := val.(type) {
	case bool:
		if t {
			return float64(1)
		}

		return float64(0)
	case int:
		return float64(t)
	case int8:
		return float64(t)
	case int16:
		return float64(t)
	case int32:
		return float64(t)
	case int64:
		return float64(t)
	case uint:
		return float64(t)
	case uint8:
		return float64(t)
	case uint16:
		return float64(t)
	case uint32:
		return float64(t)
	case uint64:
		return float64(t)
	case float32:
		return float64(t)
	case float64:
		return t
	case []byte:
		i, _ := strconv.ParseFloat(string(t), 64)
		return i
	case string:
		i, _ := strconv.ParseFloat(t, 64)
		return i
	default:
		return float64(0)
	}
}

//Int change val type to int
func Int(val interface{}) int {
	return int(Int64(val))
}

//ToInt32 change val type to int32
func Int32(val interface{}) int32 {
	return int32(Int64(val))
}

//ToFloat32 change type to float32
func Float32(val interface{}) float32 {
	return float32(Float64(val))
}

func SliceToString(val interface{}) string {
	return strings.Replace(strings.Trim(fmt.Sprint(), "[]"), " ", ",", -1)
}