java生成彩色附logo二维码

java生成二维码有很多开发的jar包如zxing是谷歌开发的，这里的话我使用zxing的开发包来实现的。我们在很多项目中需要动态生成二维码，来提供给用户，这样让更多人能够很好的通过二维码来体验自己的应用。

下面贴出代码，已经测试通过，大家可以直接复制代码使用：

最后实现结果：

java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.io.UnsupportedEncodingException;
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 MatrixToImageWriter {
 private static final int IMAGE_WIDTH = 100;
 private static final int IMAGE_HEIGHT = 100;
 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 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 {
 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++) {
  // 左上角颜色,根据自己需要调整颜色范围和颜色 
  if (x > 0 && x < 170 && y > 0 && y < 170) {
   Color color = new Color(231, 144, 56);
   int colorInt = color.getRGB();
   pixels[y * width + x] = matrix.get(x, y) ? colorInt
    : 16777215;
  }
  // 读取图片
  else 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 > halfW - 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;
   // 在图片四周形成边框
  } else {
   // 二维码颜色
   int num1 = (int) (50 - (50.0 - 13.0) / matrix.getHeight()
    * (y + 1));
   int num2 = (int) (165 - (165.0 - 72.0) / matrix.getHeight()
    * (y + 1));
   int num3 = (int) (162 - (162.0 - 107.0)
    / matrix.getHeight() * (y + 1));
   Color color = new Color(num1, num2, num3);
   int colorInt = color.getRGB();
   // 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) ? colorInt
    : 16777215;
   // 0x000000:0xffffff 
  }
  }
 }
 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; // 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) throws UnsupportedEncodingException {
 // 依次为内容(不支持中文),宽,长,中间图标路径,储存路径 
 MatrixToImageWriter.encode("http://www.baidu.com/", 512, 512,
  "D:\\logo.png", "D:\\2013-01.jpg");
 
 }
}

大家可以参考专题：java二维码进行学习

以上就是本文的全部内容，帮助大家设计属于自己的二维码。