I'm using go language to print to a POS printer, but got bad prints of Chinese charater. (English is OK)

Question

I'm using this go package, and everything is good. But got bad prints of Chinese characters. I'm not good at this kind of low-level / hardware / encoding things. So someone give a hint how can I correct my code.

Updated code：

func main() {
    testWindowPrinter()
}

func testWindowPrinter() {
    // all have bad prints
    printLines(simplifiedchinese.GBK.NewDecoder().Reader(strings.NewReader("你好")))
    printLines(simplifiedchinese.HZGB2312.NewDecoder().Reader(strings.NewReader("你好")))
    printLines(strings.NewReader("你好"))
}

func printLines(lines ...io.Reader) error {
    var defaultPrinter, err = printer.Default()
    if err != nil {
        log.Println(1, err.Error())
        return err
    }

    p, err := printer.Open(defaultPrinter)
    if err != nil {
        log.Println(2, err.Error())
        return err
    }
    defer p.Close()

    err = p.StartRawDocument("test")
    if err != nil {
        log.Println(3, err.Error())
        return err
    }
    defer p.EndDocument()

    err = p.StartPage()
    if err != nil {
        log.Println(4, err.Error())
        return err
    }

    // Am I doing right here?
    for i := range lines {
        var bf = new(bytes.Buffer)
        n, err := bf.ReadFrom(lines[i])
        if err != nil {
            println(err.Error())
        } else {
            println(n)
            fmt.Fprintln(p, bf.String())
        }
    }

    err = p.EndPage()
    if err != nil {
        log.Println(5, err.Error())
        return err
    }

    return nil
}

More details zsbd

Answer 1

It depends on your environment.

If you are executing this Go program in a Windows CMD (which only supports UTF16 encoding), you will see strange characters.
See "How to properly output a string in a Windows console with go?" as an example.
You need to convert those characters before printing them out.