charsetconv

字符集编解码库，提供以下三种接口。

编码（Encode）

将utf-8字符集编码的数据编码成其他字符集形式

func Encode(src io.Reader, dest io.Writer, destEncoding encoding.Encoding, useStageFile bool) error
func EncodeWith(src io.Reader, dest io.Writer, destCharset Charset, useStageFile bool) error
func EncodeString(src string, destCharset Charset) ([]byte, error)

解码（Decode）

将非utf-8字符集编码的数据解码成utf-8字符集编码形式

func Decode(src io.Reader, dest io.Writer, srcEncoding encoding.Encoding, useStageFile bool) error
func DecodeWith(src io.Reader, dest io.Writer, srcCharset Charset, useStageFile bool) error
func DecodeToString(src []byte, srcCharset Charset) (string, error)

转换（Convert）

在任意两种字符集之间转换编码

func Convert(src io.Reader, srcEncoding encoding.Encoding, dest io.Writer, destEncoding encoding.Encoding, useStageFile bool) error
func ConvertWith(src io.Reader, srcCharset Charset, dest io.Writer, destCharset Charset, useStageFile bool) error
func DecodeToString(src []byte, srcCharset Charset) (string, error)