Panduan penukaran amalan pengekodan golang yang cekap

import (
    "log"
    "golang.org/x/text/encoding"
    "golang.org/x/text/encoding/charmap"
)

func ConvertToUTF8(input []byte, enc encoding.Encoding) ([]byte, error) {
    output, err := enc.NewDecoder().Bytes(input)
    if err != nil {
        return nil, err
    }
    return output, nil
}

func main() {
    input := []byte{0xC7, 0xD1, 0xCE, 0xC4} // GBK编码的"中文"
    enc := charmap.GBK
    output, err := ConvertToUTF8(input, enc)
    if err != nil {
        log.Fatal(err)
    }
    log.Printf("转换后的UTF-8编码：%v", string(output))
}

import (
    "encoding/base64"
    "log"
)

func EncodeToBase64(input string) string {
    return base64.StdEncoding.EncodeToString([]byte(input))
}

func main() {
    input := "Hello, 世界"
    output := EncodeToBase64(input)
    log.Printf("Base64编码后的结果：%v", output)
}

package main

import (
    "bufio"
    "golang.org/x/text/encoding"
    "golang.org/x/text/encoding/charmap"
    "os"
    "log"
)

func ConvertFileEncoding(inputPath string, outputPath string, enc encoding.Encoding) error {
    inputFile, err := os.Open(inputPath)
    if err != nil {
        return err
    }
    defer inputFile.Close()

    outputFile, err := os.Create(outputPath)
    if err != nil {
        return err
    }
    defer outputFile.Close()

    reader := bufio.NewReader(inputFile)
    writer := bufio.NewWriter(outputFile)

    decoder := enc.NewDecoder()

    for {
        line, err := reader.ReadBytes('
')
        if err != nil {
            break
        }
        decodedLine, err := decoder.Bytes(line)
        if err != nil {
            return err
        }
        writer.Write(decodedLine)
    }
    writer.Flush()

    return nil
}

func main() {
    inputPath := "input.txt"
    outputPath := "output.txt"
    enc := charmap.GBK

    err := ConvertFileEncoding(inputPath, outputPath, enc)
    if err != nil {
        log.Fatal(err)
    }
    log.Println("文件编码转换成功！")
}