golang生成二维码

https://my.oschina.net/zhizhisoft/blog/735680?hmsr=studygolang.com&utm_medium=studygolang.com&utm_source=studygolang.com

go get github.com/boombuler/barcode

package main

import (
    "github.com/boombuler/barcode"
    "github.com/boombuler/barcode/qr"
    "image"
    "image/png"
    "log"
    "os"
)

func writePng(filename string, img image.Image) {
    file, err := os.Create(filename)
    if err != nil {
        log.Fatal(err)
    }
    err = png.Encode(file, img)
    // err = jpeg.Encode(file, img, &jpeg.Options{100}) //图像质量值为100，是最好的图像显示
    if err != nil {
        log.Fatal(err)
    }
    file.Close()
    log.Println(file.Name())
}

func main() {
    base64 := "123456"
    log.Println("Original data:", base64)
    code, err := qr.Encode(base64, qr.L, qr.Unicode)
    // code, err := code39.Encode(base64)
    if err != nil {
        log.Fatal(err)
    }
    log.Println("Encoded data: ", code.Content())

    if base64 != code.Content() {
        log.Fatal("data differs")
    }

    code, err = barcode.Scale(code, 300, 300)
    if err != nil {
        log.Fatal(err)
    }

    writePng("test.png", code)
}