二维码生成代码（Java）

1 使用Goole的类库，下载地址http://pan.baidu.com/s/1jGy7D5s

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;import javax.imageio.ImageIO;import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;public class Qrgoole {private static final int IMAGE_WIDTH = 15;private static final int IMAGE_HEIGHT = 15;private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2;private static final int FRAME_WIDTH = 2;private static MultiFormatWriter mutiWriter = new MultiFormatWriter();public static void encode(String text, int width, int height,String srcImagePath, String destImagePath) {try {ImageIO.write(genBarcode(text, width, height, srcImagePath),"jpg", new File(destImagePath));} catch (IOException e) {e.printStackTrace();} catch (WriterException e) {e.printStackTrace();}}private static BufferedImage genBarcode(String content, int width,int height, String srcImagePath) throws WriterException,IOException {BufferedImage scaleImage = scale(srcImagePath, IMAGE_WIDTH,IMAGE_HEIGHT, false);int[][] srcPixels = new int[IMAGE_WIDTH][IMAGE_HEIGHT];for (int i = 0; i < scaleImage.getWidth(); i++) {for (int j = 0; j < scaleImage.getHeight(); j++) {srcPixels[i][j] = scaleImage.getRGB(i, j);}}Hashtable<EncodeHintType,Object> hint = new Hashtable<EncodeHintType, Object>();hint.put(EncodeHintType.CHARACTER_SET, "utf-8");hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE,width, height, hint);int halfW = matrix.getWidth() / 2;int halfH = matrix.getHeight() / 2;int[] pixels = new int[width * height];for (int y = 0; y < matrix.getHeight(); y++) {for (int x = 0; x < matrix.getWidth(); x++) {if (x > halfW - IMAGE_HALF_WIDTH&& x < halfW + IMAGE_HALF_WIDTH&& y > halfH - IMAGE_HALF_WIDTH&& y < halfH + IMAGE_HALF_WIDTH) {pixels[y * width + x] = srcPixels[x - halfW+ IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH];}else if ((x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH&& x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH+ IMAGE_HALF_WIDTH + FRAME_WIDTH)|| (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH+ IMAGE_HALF_WIDTH + FRAME_WIDTH)|| (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH- IMAGE_HALF_WIDTH + FRAME_WIDTH)|| (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH&& y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH+ IMAGE_HALF_WIDTH + FRAME_WIDTH)) {pixels[y * width + x] = 0xfffffff;} else {pixels[y * width + x] = matrix.get(x, y) ? 0xff000000: 0xfffffff;}}}BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);image.getRaster().setDataElements(0, 0, width, height, pixels);return image;}private static BufferedImage scale(String srcImageFile, int height,int width, boolean hasFiller) throws IOException {double ratio = 0.0; System.out.println("scale():"+ srcImageFile);File file = new File(srcImageFile);BufferedImage srcImage = ImageIO.read(file);Image destImage = srcImage.getScaledInstance(width, height,BufferedImage.SCALE_SMOOTH);if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width)) {if (srcImage.getHeight() > srcImage.getWidth()) {ratio = (new Integer(height)).doubleValue()/ srcImage.getHeight();} else {ratio = (new Integer(width)).doubleValue()/ srcImage.getWidth();}AffineTransformOp op = new AffineTransformOp(AffineTransform.getScaleInstance(ratio, ratio), null);destImage = op.filter(srcImage, null);}if (hasFiller) {BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);Graphics2D graphic = image.createGraphics();graphic.setColor(Color.white);graphic.fillRect(0, 0, width, height);if (width == destImage.getWidth(null))graphic.drawImage(destImage, 0, (height - destImage.getHeight(null)) / 2, destImage.getWidth(null),destImage.getHeight(null), Color.white, null);elsegraphic.drawImage(destImage,(width - destImage.getWidth(null)) / 2, 0, destImage.getWidth(null), destImage.getHeight(null),Color.white, null);graphic.dispose();destImage = image;}return (BufferedImage) destImage;}public static void main(String[] args) {Qrgoole.encode("http://www.baidu.com/",85, 85, "c:\\a.jpg", "c:\\2015-7-18.jpg");}
}

2 使用的类库，下载地址 http://pan.baidu.com/s/1kT9va2z

 import java.io.*; import java.util.Date; import java.awt.*; import java.awt.image.*; import javax.imageio.*; import com.swetake.util.Qrcode; public class QrCode { static int width = 90; static int height = 90; public QrCode() { } public static void create_image(String sms_info)throws Exception{ try{ Qrcode testQrcode =new Qrcode(); testQrcode.setQrcodeErrorCorrect('M'); testQrcode.setQrcodeEncodeMode('B'); testQrcode.setQrcodeVersion(7); String testString = sms_info; byte[] d = testString.getBytes("gbk"); BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_BINARY); Graphics2D g = bi.createGraphics(); g.setBackground(Color.WHITE); g.clearRect(0, 0, width, height); g.setColor(Color.BLACK); // 限制最大字节数为119 if (d.length>0 && d.length <120){ boolean[][] s = testQrcode.calQrcode(d); for (int i=0;i<s.length;i++){ for (int j=0;j<s.length;j++){ if (s[j][i]) { g.fillRect(j*2,i*2,2,2); } } } } g.dispose(); bi.flush(); File f = new File("c:\\a.jpg"); if(!f.exists()) f.createNewFile(); ImageIO.write(bi, "jpg", f); } catch (Exception e) { e.printStackTrace(); }  } public static void main(String[] args) throws Exception { String string = "http://www.baidu.com/"; QrCode.create_image(string); }  }

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