import Java.awt.BasicStroke;import java.awt.Color;import java.awt.Graphics2D;import java.awt.Image;import java.awt.Shape;import java.awt.geom.AffineTransform;import java.awt.geom.RoundRectangle2D;import java.awt.image.AffineTransformOp;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;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.WriterException;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;public class Zxing {private static final int BLACK = 0xFF000000;private static final int WHITE = 0xFFFFFFFF;// 圖片寬度的一般  private static final int IMAGE_WIDTH = 80;  private static final int IMAGE_HEIGHT = 80;  private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2;  private static final int FRAME_WIDTH = 2;   // 二維碼寫碼器  private static MultiFormatWriter mutiWriter = new MultiFormatWriter(); public static void main(String[] args) {try {//BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 400, 400,hints);String content="13400000000";//二維碼的內(nèi)容BufferedImage image = genBarcode(content, 400, 400, "F://amazed.png");  if (!ImageIO.write(image, "jpg", new File("F://2122.jpg"))) {   throw new IOException("Could not write an image of format ");  }          /**           //將上面的代碼換成此處，使用流讀入到頁面即可OutputStream os = response.getOutputStream(); if (!ImageIO.write(image, "jpg",os)) {       throw new IOException("Could not write an image of format ");      }          **/} catch (WriterException e) {e.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}private 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;}private static BufferedImage genBarcode(String content, int width,      int height, String srcImagePath) throws WriterException,      IOException {    // 讀取源圖像    BufferedImage scaleImage = scale(srcImagePath, IMAGE_WIDTH,        IMAGE_HEIGHT, true);    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);      }    }     Map<EncodeHintType, Object> hint = new HashMap<EncodeHintType, Object>();    hint.put(EncodeHintType.CHARACTER_SET, "utf-8"); //內(nèi)容編碼   hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);//錯(cuò)誤等級   hint.put(EncodeHintType.MARGIN, 1); //設(shè)置二維碼外邊框的空白區(qū)域的寬度   // 生成二維碼    BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE,        width, height, hint);     // 二維矩陣轉(zhuǎn)為一維像素?cái)?shù)組    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++) {        // 讀取圖片        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];        }         // 在圖片四周形成邊框        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 {          // 此處可以修改二維碼的顏色，可以分別制定二維碼和背景的顏色；          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;  }   /**   * 把傳入的原始圖像按高度和寬度進(jìn)行縮放，生成符合要求的圖標(biāo)   *   * @param srcImageFile   *      源文件地址   * @param height   *      目標(biāo)高度   * @param width   *      目標(biāo)寬度   * @param hasFiller   *      比例不對時(shí)是否需要補(bǔ)白：true為補(bǔ)白; false為不補(bǔ)白;   * @throws IOException   */  private static BufferedImage scale(String srcImageFile, int height,      int width, boolean hasFiller) throws IOException {    double ratio = 0.0; // 縮放比例    File file = new File(srcImageFile);    BufferedImage srcImage = ImageIO.read(file);    Image destImage = srcImage.getScaledInstance(width, height,        BufferedImage.SCALE_SMOOTH);    // 計(jì)算比例    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) {// 補(bǔ)白      BufferedImage image = new BufferedImage(width, height,          BufferedImage.TYPE_INT_RGB);      Graphics2D graphic = image.createGraphics();      graphic.setColor(Color.PINK);      graphic.fillRect(10, 10, width, height);      graphic.drawRect(100, 360, 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);        Shape shape = new RoundRectangle2D.Float(0, (height - destImage.getHeight(null)) / 2, width, width, 20, 20);       graphic.setStroke(new BasicStroke(5f));       graphic.draw(shape);     }     else {       graphic.drawImage(destImage,            (width - destImage.getWidth(null)) / 2, 0,            destImage.getWidth(null), destImage.getHeight(null),            Color.white, null);       Shape shape = new RoundRectangle2D.Float((width - destImage.getWidth(null)) / 2, 0, width, width, 20, 20);       graphic.setStroke(new BasicStroke(5f));       graphic.draw(shape);     }     graphic.dispose();      destImage = image;         }    return (BufferedImage) destImage;  } }