二维码生成器
package com.qrcode; import java.awt.Color; import java.awt.Graphics2D; import java.awt.p_w_picpath.BufferedImage; import java.io.File; import javax.p_w_picpathio.ImageIO; import com.swetake.util.Qrcode; public class QRCodeGenerator { private static QRCodeGenerator qrCodeGenerator = new QRCodeGenerator(); private QRCodeGenerator(){} public static QRCodeGenerator getInstance(){ return qrCodeGenerator; } public void generatrQRCode(String content, String imgPath) { try { Qrcode qrcodeHandler = new Qrcode(); qrcodeHandler.setQrcodeErrorCorrect('M'); qrcodeHandler.setQrcodeEncodeMode('B'); qrcodeHandler.setQrcodeVersion(7); byte[] contentBytes = content.getBytes(); BufferedImage bufImg = new BufferedImage(140, 140, BufferedImage.TYPE_INT_RGB); Graphics2D gs = bufImg.createGraphics(); gs.setBackground(Color.WHITE); gs.clearRect(0, 0, 140, 140); // 设定图像颜色> BLACK gs.setColor(Color.BLACK); // 设置偏移量 不设置可能导致解析出错 int pixoff = 2; // 输出内容> 二维码 if (contentBytes.length > 0 && contentBytes.length < 120) { boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes); for (int i = 0; i < codeOut.length; i++) { for (int j = 0; j < codeOut.length; j++) { if (codeOut[j][i]) { gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3); } } } } else { System.err.println("QRCode content bytes length = "+contentBytes.length + " not in [ 0,120 ]. "); } gs.dispose(); bufImg.flush(); File imgFile = new File(imgPath); // 生成二维码QRCode图片 ImageIO.write(bufImg, "png", imgFile); } catch (Exception e) { throw new RuntimeException(e); } } }
2. 二维码解析器
package com.qrcode; import java.awt.p_w_picpath.BufferedImage; import java.io.File; import javax.p_w_picpathio.ImageIO; import jp.sourceforge.qrcode.QRCodeDecoder; import jp.sourceforge.qrcode.data.QRCodeImage; public class QRCodeParser { private static QRCodeParser qrCodeParser = new QRCodeParser(); private QRCodeParser(){} public static QRCodeParser getInstance(){ return qrCodeParser; } public String parseQRCode(String imgPath) { File p_w_picpathFile = new File(imgPath); BufferedImage bufImg = null; String decodedData = null; try { bufImg = ImageIO.read(p_w_picpathFile); QRCodeDecoder decoder = new QRCodeDecoder(); decodedData = new String(decoder.decode(new J2SEImage(bufImg))); } catch (Exception e) { throw new RuntimeException(e); } return decodedData; } private class J2SEImage implements QRCodeImage { private BufferedImage bufImg; public J2SEImage(BufferedImage bufImg) { this.bufImg = bufImg; } public int getWidth() { return bufImg.getWidth(); } public int getHeight() { return bufImg.getHeight(); } public int getPixel(int x, int y) { return bufImg.getRGB(x, y); } } }
3.测试
package com.qrcode; public class Main { public static void main(String[] args) { String content="这是我的QRCode"; String imgPath="E:/mine/j2ee/QRCode/src/main/java/abc.png"; QRCodeGenerator.getInstance().generatrQRCode(content, imgPath); String result = QRCodeParser.getInstance().parseQRCode(imgPath); System.out.println(result); } }
附件是二维码生成,解析所需的jars.