1 引言git
在github上有好用golan二維碼生成和讀取庫,兩個生成二維碼的qrcode庫和一個讀取qrcode庫。github
skip2/go-qrcode生成二維碼,github地址:https://github.com/skip2/go-qrcode.net
boombuler/barcode生成二維碼,github地址:https://github.com/boombuler/barcode
code
tuotoo/qrcode解析二維碼,github地址:https://github.com/tuotoo/qrcodeblog
2 代碼圖片
import ( "image/png" "os" "github.com/boombuler/barcode" "github.com/boombuler/barcode/qr" "github.com/skip2/go-qrcode" qrcodeReader "github.com/tuotoo/qrcode" "fmt" ) func main() { content := "https://www.cnblogs.com/fanbi" size := 200 //Skip2 dest := "qrcode.png" CreateQRCodeBySkip2(content, qrcode.Medium, size, dest) fmt.Println("QRCodeBySkip2 content",ReadQRCode(dest)) //Boombuler dest2 := "qrcode2.png" CreateQRCodeByBoombuler(content, qr.M, size, dest2) fmt.Println("QRCodeBySBoombule content",ReadQRCode(dest2)) //輸出 //QRCodeBySkip2 content https://www.cnblogs.com/fanbi //QRCodeBySBoombule content https://www.cnblogs.com/fanbi } func CreateQRCodeBySkip2(content string, quality qrcode.RecoveryLevel, size int, dest string) (err error) { err = qrcode.WriteFile(content, quality, size, dest) return } func CreateQRCodeByBoombuler(content string, quality qr.ErrorCorrectionLevel, size int, dest string) (err error) { qrCode, err := qr.Encode(content, quality, qr.Auto) if err != nil { return } // Scale the barcode to 200x200 pixels qrCode, err = barcode.Scale(qrCode, size, size) if err != nil { return } // create the output file file, err := os.Create(dest) if err != nil { return } defer file.Close() // encode the barcode as png err = png.Encode(file, qrCode) if err != nil { return } return } func ReadQRCode(filename string) (content string) { fi, err := os.Open(filename) if err != nil { fmt.Println(err.Error()) return } defer fi.Close() qrmatrix, err := qrcodeReader.Decode(fi) if err != nil { fmt.Println(err.Error()) return } return qrmatrix.Content }
效果圖:ip
qrcode.png
qrcode2.png
說明:第二種生成的二維碼會更好,圖片的四周白邊佔比小。get
3 參考string
https://blog.csdn.net/wangshubo1989/article/details/77897363 it