Golang二维码qrcode

导入qrcode
go get github.com/skip2/go-qrcode

import (
    "github.com/skip2/go-qrcode"
    "image/color"
    "log"
    "net/http"
)

生成二维码文件

// Level L: 7% error recovery.
// Low

// Level M: 15% error recovery. Good default choice.
// Medium

// Level Q: 25% error recovery.
// High

// Level H: 30% error recovery.
// Highest
_ = qrcode.WriteFile("https://www.baidu.com/", qrcode.Low, 500, "qrcode-Low.png")

浏览器输出二维码

http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
    f, err := qrcode.Encode("https://www.baidu.com/", qrcode.Highest, 300)
    if err != nil {
        log.Println(err.Error())
        return
    }
    w.Write(f)
})
_ = http.ListenAndServe("127.0.0.1:9090", nil)

生成不同颜色二维码

// 背景颜色
b := color.RGBA{
    R: 255,
    G: 255,
    B: 255,
    A: 255,
}
// 二维码颜色
c := color.RGBA{
    R: 177,
    G: 7,
    B: 7,
    A: 255,
}
_ = qrcode.WriteColorFile("https://www.baidu.com/", qrcode.Medium, 300, b, c, "qrcode-color.png")