golang如何生成与读取二维码

golang如何生成与读取二维码

生成二维码

skip2/go-qrcode生成二维码

获取:

go get skip2/go-qrcode

生成二维码图片:

package main

import qrcode "github.com/skip2/go-qrcode"
import "fmt"

func main() {
    err := qrcode.WriteFile("http://blog.csdn.net/wangshubo1989", qrcode.Medium, 256, "qr.png")
    if err != nil {
        fmt.Println("write error")
    }
}

boombuler/barcode生成二维码

github地址:https://github.com/boombuler/barcode

获取:

go get github.com/boombuler/barcode

生成二维码图片:

package main

import (
    "image/png"
    "os"

    "github.com/boombuler/barcode"
    "github.com/boombuler/barcode/qr"
)

func main() {

    qrCode, _ := qr.Encode("http://blog.csdn.net/wangshubo1989", qr.M, qr.Auto)

    qrCode, _ = barcode.Scale(qrCode, 256, 256)

    file, _ := os.Create("qr2.png")
    defer file.Close()

    png.Encode(file, qrCode)
}

识别二维码

github地址:https://github.com/tuotoo/qrcode

获取:

go get github.com/tuotoo/qrcode

读取二维码图片:

package main

import (
    "fmt"
    "os"

    "github.com/tuotoo/qrcode"
)

func main() {

    fi, err := os.Open("qrcode.png")
    if err != nil {
        fmt.Println(err.Error())
        return
    }
    defer fi.Close()
    qrmatrix, err := qrcode.Decode(fi)
    if err != nil {
        fmt.Println(err.Error())
        return
    }
    fmt.Println(qrmatrix.Content)
}

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