字符串编码集转换 -- text

项目地址：
golang.org/x/text

用法：

 package main
 import (
     "bytes"
     "fmt"
     "golang.org/x/text/encoding/simplifiedchinese"
     "golang.org/x/text/transform"
     "io/ioutil"
 )
 // GBK 转 UTF-8
 func GbkToUtf8(s []byte) ([]byte, error) {
     reader := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewDecoder())
     d, e := ioutil.ReadAll(reader)
     if e != nil {
         return nil, e
     }
     return d, nil
 }
 // UTF-8 转 GBK
 func Utf8ToGbk(s []byte) ([]byte, error) {
     reader := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewEncoder())
     d, e := ioutil.ReadAll(reader)
     if e != nil {
         return nil, e
     }
     return d, nil
 }
 // 编码转换测试
 func main() {
     s := "[debug]: 编码转换测试"
     gbk, err := Utf8ToGbk([]byte(s))
     if err != nil {
         fmt.Println(err)
     } else {
         fmt.Println(string(gbk))
     }
     utf8, err := GbkToUtf8(gbk)
     if err != nil {
         fmt.Println(err)
     } else {
         fmt.Println(string(utf8))
     }
 }