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java生成带图片的微信二维码
作者:网络转载 发布时间:[ 2016/12/26 10:56:20 ] 推荐标签:测试开发技术 Java

  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.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 QREncodeWithPic { 
  // 图片宽度的一般 
  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; 
  // 二维码写码器 
  private static MultiFormatWriter mutiWriter = new MultiFormatWriter(); 
  public static void encode(String content, int width, int height, 
  String srcImagePath, String destImagePath) { 
  try { 
  ImageIO.write(genBarcode(content, 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 { 
  // 读取源图像 
  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"); 
  hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); 
  // 生成二维码 
  BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE, 
  width, height, hint); 
  // 二维矩阵转为一维像素数组 
  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++) { 
  // 读取图片 
  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]; 
  }  
  // 在图片四周形成边框 
  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 { 
  // 此处可以修改二维码的颜色,可以分别制定二维码和背景的颜色; 
  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; 
  } 
  /**
  * 把传入的原始图像按高度和宽度进行缩放,生成符合要求的图标
  * 
  * @param srcImageFile
  *            源文件地址
  * @param height
  *            目标高度
  * @param width
  *            目标宽度
  * @param hasFiller
  *            比例不对时是否需要补白:true为补白; false为不补白;
  * @throws IOException
  */ 
  private static BufferedImage scale(String srcImageFile, int height, 
  int width, boolean hasFiller) throws IOException { 
  double ratio = 0.0; // 缩放比例 
  File file = new File(srcImageFile); 
  BufferedImage srcImage = ImageIO.read(file); 
  Image destImage = srcImage.getScaledInstance(width, height, 
  BufferedImage.SCALE_SMOOTH); 
  // 计算比例 
  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) {// 补白 
  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); 
  else 
  graphic.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) { 
  QREncodeWithPic 
  .encode("http://weixin.qq.com/r/h685IaDEkf3ureRC9-qV", 
  600, 600, "D:\lux.png", "D:\qr.png"); 
  } 
  } 

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