支付宝、微信付款二维码 自定义中间图片

通过Google Zxing 生成二维码，代码如下：

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 BarcodeFactory {      // 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) {          BarcodeFactory                  .encode("http://coolshell.cn/articles/10590.html",                          300, 300, "F:\\2013.jpg", "F:\\2013-01.jpg");      }  }  

依赖jar包：

<dependency>      <groupId>com.google.zxing</groupId>      <artifactId>core</artifactId>      <version>2.2</version>  </dependency>