springboot-生成二维码

比眉伴天荒 2022-02-21 05:27 164阅读 0赞

<**dependency**>  
   <**groupId**>com.google.zxing</**groupId**>  
   <**artifactId**>core</**artifactId**>  
   <**version**>3.3.3</**version**>  
</**dependency**>  
<**dependency**>  
   <**groupId**>com.google.zxing</**groupId**>  
   <**artifactId**>javase</**artifactId**>  
   <**version**>3.3.1</**version**>  
</**dependency**>

**package** com.wps.calendar.common.util;  
**import** java.awt.Color;  
**import** java.awt.Graphics2D;  
**import** java.awt.image.BufferedImage;  
**import** java.io.File;  
**import** java.io.FileInputStream;  
**import** java.io.FileOutputStream;  
**import** java.io.IOException;  
**import** java.io.InputStream;  
**import** java.io.OutputStream;  
**import** java.util.Hashtable;  
  
**import** javax.imageio.ImageIO;  
  
**import** com.google.zxing.BarcodeFormat;  
**import** com.google.zxing.BinaryBitmap;  
**import** com.google.zxing.EncodeHintType;  
**import** com.google.zxing.LuminanceSource;  
**import** com.google.zxing.ReaderException;  
**import** com.google.zxing.Result;  
**import** com.google.zxing.WriterException;  
**import** com.google.zxing.client.j2se.BufferedImageLuminanceSource;  
**import** com.google.zxing.common.BitMatrix;  
**import** com.google.zxing.common.HybridBinarizer;  
**import** com.google.zxing.qrcode.QRCodeReader;  
**import** com.google.zxing.qrcode.QRCodeWriter;  
**import** com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;  
*/\*\**  
* \** ***@Description:*** *二维码生成和读的工具类*  
* \** ***@Author:*** *Administrator*  
* \** ***@CreateDate:*** *2018/9/12 11:53*  
* \** ***@Version:*** *1.0*  
* \*/*  
**public class** QrCodeCreateUtil \{   
    */\*\**  
*     \* 生成包含字符串信息的二维码图片*  
*     \** ***@param*** ***outputStream*** *文件输出流路径*  
*     \** ***@param*** ***content*** *二维码携带信息*  
*     \** ***@param*** ***qrCodeSize*** *二维码图片大小*  
*     \** ***@param*** ***imageFormat*** *二维码的格式*  
*     \** ***@throws*** *WriterException*  
*     \** ***@throws*** *IOException*  
*     \*/*  
*    ***public static boolean** createQrCode(OutputStream outputStream, String content, **int** qrCodeSize, String imageFormat) **throws** WriterException, IOException\{   
        *//设置二维码纠错级别ＭＡＰ*  
*        *Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = **new** Hashtable<EncodeHintType, ErrorCorrectionLevel>();  
        hintMap.put(EncodeHintType.***ERROR\_CORRECTION***, ErrorCorrectionLevel.***L***);  *// 矫错级别*  
*        *QRCodeWriter qrCodeWriter = **new** QRCodeWriter();  
        *//创建比特矩阵(位矩阵)的QR码编码的字符串*  
*        *BitMatrix byteMatrix = qrCodeWriter.encode(content, BarcodeFormat.***QR\_CODE***, qrCodeSize, qrCodeSize, hintMap);  
        *// 使BufferedImage勾画QRCode  (matrixWidth 是行二维码像素点)*  
*        ***int** matrixWidth = byteMatrix.getWidth();  
        **int** revise = matrixWidth \* 2 / 9;  
        BufferedImage image = **new** BufferedImage(matrixWidth-revise, matrixWidth-revise, BufferedImage.***TYPE\_INT\_RGB***);  
        image.createGraphics();  
        Graphics2D graphics = (Graphics2D) image.getGraphics();  
        graphics.setColor(Color.***WHITE***);  
        graphics.fillRect(0, 0, matrixWidth, matrixWidth);  
        *// 使用比特矩阵画并保存图像*  
*        *graphics.setColor(Color.***BLACK***);  
        **for** (**int** i = 0; i < matrixWidth; i++)\{   
            **for** (**int** j = 0; j < matrixWidth; j++)\{   
                **if** (byteMatrix.get(i, j))\{   
                    graphics.fillRect(i-revise/2, j-revise/2, 1, 1);  
                \}  
            \}  
        \}  
        **return** ImageIO.*write*(image, imageFormat, outputStream);  
    \}  
  
    */\*\**  
*     \* 读二维码并输出携带的信息*  
*     \*/*  
*    ***public static** String readQrCode(InputStream inputStream) **throws** IOException\{   
        *//从输入流中获取字符串信息*  
*        *BufferedImage image = ImageIO.*read*(inputStream);  
        *//将图像转换为二进制位图源*  
*        *LuminanceSource source = **new** BufferedImageLuminanceSource(image);  
        BinaryBitmap bitmap = **new** BinaryBitmap(**new** HybridBinarizer(source));  
        QRCodeReader reader = **new** QRCodeReader();  
        Result result = **null** ;  
        **try** \{   
            result = reader.decode(bitmap);  
        \} **catch** (ReaderException e) \{   
            e.printStackTrace();  
        \}  
        **return** result.getText();  
    \}  
  
    */\*\**  
*     \* 测试代码*  
*     \** ***@throws*** *WriterException*  
*     \*/*  
*    ***public static void** main(String\[\] args) **throws** IOException, WriterException \{   
  
        String content = **"http://192.168.39.35:8090/r/event/accept/description?id=134"**;  
        String path = **"F:****\\\\****data****\\\\****resources****\\\\****share-images****\\\\****test.jpg"**;  
        *createQrCode*(**new** FileOutputStream(**new** File(path)), content,90,**"JPEG"**);  
        String info = *readQrCode*(**new** FileInputStream(**new** File(path)));  
        System.***out***.println(info);  
    \}  
  
\}