创建二维码
package com.sun.test.QRcode; import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatWriter; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; import java.io.File; import java.nio.file.Path; import java.util.HashMap; //生成二维码 public class CreateQRcode { public static void main(String[] args){ final int width = 300; final int height = 300; final String format = "png"; final String content = "我爱你,中国121"; //定义二维码的参数 HashMap hints = new HashMap(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M); hints.put(EncodeHintType.MARGIN, 2); //生成二维码 try{ //OutputStream stream = new OutputStreamWriter(); BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints); // http://shenghuoplus.oss-cn-shenzhen.aliyuncs.com/菜品图片/ Path file = new File("F:/play.png").toPath(); MatrixToImageWriter.writeToPath(bitMatrix, format, file); //MatrixToImageWriter.writeToStream(bitMatrix, format, stream); }catch(Exception e){ System.out.println("出错了-------------------------------"); e.printStackTrace(); } } }
读取二维码的内容
package com.sun.test.QRcode; import com.google.zxing.BinaryBitmap; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatReader; import com.google.zxing.Result; import com.google.zxing.client.j2se.BufferedImageLuminanceSource; import com.google.zxing.common.HybridBinarizer; import javax.imageio.ImageIO; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.util.HashMap; public class ReadQRcode { public static void main(String[] args) throws Exception { MultiFormatReader formatReader = new MultiFormatReader(); File file = new File("F:/play.png"); BufferedImage image = null; try { image = ImageIO.read(file); } catch (IOException e) { System.out.println("出错了---------------"); return; } BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image))); //定义二维码的参数 HashMap hints = new HashMap(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); Result result = formatReader.decode(binaryBitmap, hints); System.out.println("二维码解析结果:" + result.toString()); System.out.println("二维码的格式:" + result.getBarcodeFormat()); System.out.println("二维码的文本内容:" + result.getText()); } }