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首先将需要的jar加到工程中
QRCode.jar、zxingcore-2.2.jar、javase-2.2.jar(也可不加,增加一个MatrixToImageWriter类也可以)
package com.demo; import com.google.zxing.common.BitMatrix; import javax.imageio.ImageIO; import java.io.File; import java.io.OutputStream; import java.io.IOException; import java.awt.image.BufferedImage; /** * * @ClassName: MatrixToImageWriter * @Description: 如果不想增加javase-2.2.jar,新增此类即可 * @date 2015年4月30日 上午10:05:51 * @since AR1.0 */ public final class MatrixToImageWriter { private static final int BLACK = 0xFF000000; private static final int WHITE = 0xFFFFFFFF; private MatrixToImageWriter() {} public static BufferedImage toBufferedImage(BitMatrix matrix) { int width = matrix.getWidth(); int height = matrix.getHeight(); BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); for (int x = 0; x < width; x++) { for (int y = 0; y < height; y++) { image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE); } } return image; } public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException { BufferedImage image = toBufferedImage(matrix); if (!ImageIO.write(image, format, file)) { throw new IOException("Could not write an image of format " + format + " to " + file); } } public static void writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException { BufferedImage image = toBufferedImage(matrix); if (!ImageIO.write(image, format, stream)) { throw new IOException("Could not write an image of format " + format); } } }
测试类
package com.demo; import java.awt.Color; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.File; import java.util.HashMap; import java.util.Map; import javax.imageio.ImageIO; import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatWriter; import com.google.zxing.common.BitMatrix; import com.swetake.util.Qrcode; public class QRCodeDemo { public static void main(String[] args) { QRCodeDemo.encoderQRCode("这是用Qrcode生成的二维码", "C:/Users/liyy/Desktop/TestQRCode.png"); QRCodeDemo.zXingTest("这是用zXing生成的二维码", "C:/Users/liyy/Desktop/TestZXing.png"); } /** * * @Title: encoderQRCode * @Description: 使用Qrcode生成二维码 * @param @param content * @param @param imgPath * @return void 返回类型 * @throws */ public static void encoderQRCode(String content, String imgPath) { try { Qrcode qrcodeHandler = new Qrcode(); qrcodeHandler.setQrcodeErrorCorrect(‘M‘);// 纠错 qrcodeHandler.setQrcodeEncodeMode(‘B‘); qrcodeHandler.setQrcodeVersion(7); byte[] contentBytes = content.getBytes("gb2312"); 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 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); System.out.println("Qrcode已输出二维码!"); } catch (Exception e) { e.printStackTrace(); } } /** * * @Title: zXingTest * @Description: 使用google的zXing生成二维码 * @param * @return void 返回类型 * @throws */ @SuppressWarnings({ "rawtypes", "unchecked" }) public static void zXingTest(String content, String imgPath) { try { MultiFormatWriter multiFormatWriter = new MultiFormatWriter(); Map hints = new HashMap(); hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 400, 400, hints); File file1 = new File(imgPath); MatrixToImageWriter.writeToFile(bitMatrix, "jpg", file1); System.out.println("zXing已输出二维码!"); } catch (Exception e) { e.printStackTrace(); } } }
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原文地址:http://my.oschina.net/u/2292000/blog/408426