二维码 可以加颜色的

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

import javax.imageio.ImageIO;

import com.google.zxing.common.BitMatrix;

/**
* 二维码的生成需要借助MatrixToImageWriter类，该类是由Google提供的，可以将该类直接拷贝到源码中使用，当然你也可以自己写个
* 生产条形码的基类
*/
public class MatrixToImageWriter {
private static final int BLACK = 0xFF000000;//用于设置图案的颜色
private static final int WHITE = 0xFFFFFFFF; //用于背景色

private MatrixToImageWriter() {
}

public static 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));
//				image.setRGB(x, y,  (matrix.get(x, y) ? Color.YELLOW.getRGB() : Color.CYAN.getRGB()));
}
}
return image;
}

public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
BufferedImage image = toBufferedImage(matrix);
//设置logo图标
LogoConfig logoConfig = new LogoConfig();
image = logoConfig.LogoMatrix(image);

if (!ImageIO.write(image, format, file)) {
throw new IOException("Could not write an image of format " + format + " to " + file);
}else{
System.out.println("图片生成成功！");
}
}

public static void writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException {
BufferedImage image = toBufferedImage(matrix);
//设置logo图标
LogoConfig logoConfig = new LogoConfig();
image = logoConfig.LogoMatrix(image);

if (!ImageIO.write(image, format, stream)) {
throw new IOException("Could not write an image of format " + format);
}
}
}