Java实现的生成二维码和解析二维码URL操作示例

 <!-- 二维码依赖 start --> com.google.zxingjavase3.0.0

 package com.xgt.util; import com.google.zxing.*; import com.google.zxing.client.j2se.BufferedImageLuminanceSource; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; import org.apache.commons.io.IOUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import sun.misc.BASE64Encoder; import javax.imageio.ImageIO; import java.awt.image.BufferedImage; import java.io.*; import java.nio.file.Path; import java.util.Hashtable; public class QRCodeUtil { private static final Logger logger = LoggerFactory.getLogger(QRCodeUtil.class); /** * 创建二维码 * @param url * @param fileName * @return * @throws IOException */ public static String createQRCode(String url,String fileDirectory,String fileName) throws IOException { int width = 500; int height = 500; String format = "png"; Hashtable hints = new Hashtable(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M); hints.put(EncodeHintType.MARGIN, 2); try { BitMatrix bitMatrix = new MultiFormatWriter().encode(url, BarcodeFormat.QR_CODE, width, height, hints); File fileDir = new File(fileDirectory); FileToolUtil.judeDirExists(fileDir); Path file = new File(fileDirectory,fileName+".png-600").toPath();//在D盘生成二维码图片 MatrixToImageWriter.writeToPath(bitMatrix, format, file); BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix); ByteArrayOutputStream os = new ByteArrayOutputStream();//新建流。 ImageIO.write(image, format, os);//利用ImageIO类提供的write方法，将bi以png图片的数据模式写入流。 byte b[] = os.toByteArray();//从流中获取数据数组。 String str = new BASE64Encoder().encode(b); IOUtils.closeQuietly(os); return str; } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); }finally { //DeleteFileUtil.delete(fileDirectory); } return "NULL"; } /** * 解析出二维码的url * 无用 * @param file * @param fileDirectory * @throws NotFoundException */ public static void anlaysisQRCode(File file,String fileDirectory) throws NotFoundException { MultiFormatReader formatReader=new MultiFormatReader(); BufferedImage image=null; try { image = ImageIO.read(file); BinaryBitmap binaryBitmap =new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image))); Hashtable hints=new Hashtable(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); Result result=formatReader.decode(binaryBitmap,hints); logger.info("解析结果："+result.toString()); logger.info("解析格式:"+result.getBarcodeFormat()); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally { DeleteFileUtil.delete(fileDirectory); } } }