因为要公司业务中有个要做个用手机扫描书本上二维码的功能，我要做一个给出版社提供一个可以生成不同尺寸和颜色的二维码功能

   先上效果图

   先选择颜色前端页面代码我就不展示了

   生成效果图

工具类代码如下

package com.gzxtjy.resources.util;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Hashtable;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
/**
 * @version 1.0 2014-05-04
 * @author hjn
 *
 */
public class TwoDimensionCodeUtil {
	/*背景色,默认黑色*/
	private static  int foreColor = 0xFF000000;
	/*前景色，默认白色*/
	private static  int backColor = 0xFFFFFFFF;

	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) ? foreColor : backColor);
			}
		}
		TwoDimensionCodeUtil.foreColor = 0xFF000000;
		TwoDimensionCodeUtil.backColor = 0xFFFFFFFF;
		return image;
	}
	

	public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
		BufferedImage image = toBufferedImage(matrix);
		if (!ImageIO.write(image, format, file)) {
			throw new IOException("Could not write an image of format " + format + " to " + file);
		}
	}

	public static void writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException {
		BufferedImage image = toBufferedImage(matrix);
		if (!ImageIO.write(image, format, stream)) {
			throw new IOException("Could not write an image of format " + format);
		}
	}
/**
 * 
 * @param content内容
 * @param desPath目标图片路径
 * @param width长
 * @param height宽
 * @return
 */
	@SuppressWarnings("unchecked")
	public static boolean stringToImage(String content, String desPath, int width, int height) {
		try {
			MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
			@SuppressWarnings("rawtypes")
			Hashtable hints = new Hashtable();
			hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
			BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hints);
			System.out.println(desPath);
			File file1 = new File(desPath);
			if(!file1.exists()){
				File parent=file1.getParentFile();
					parent.mkdirs();
				file1.createNewFile();
			}
			MatrixToImageWriter.writeToFile(bitMatrix, "gif", file1);
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
		return false;
	}
	
	
	@SuppressWarnings("unchecked")
	public static boolean stringToImage(String content, String desPath, int width, int height,int backColor,int foreColor) {
		TwoDimensionCodeUtil.backColor=backColor;
		TwoDimensionCodeUtil.foreColor=foreColor;
		try {
			MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
			@SuppressWarnings("rawtypes")
			Hashtable hints = new Hashtable();
			hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
			BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hints);
			System.out.println(desPath);
			File file1 = new File(desPath);
			if(!file1.exists()){
				File parent=file1.getParentFile();
					parent.mkdirs();
				file1.createNewFile();
			}
			TwoDimensionCodeUtil.writeToFile(bitMatrix, "gif", file1);
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
		return false;
	}

	public static void main(String[] args) {
		String content = "测试";
		String path = "D:/book/数学/餐巾纸.jpg";
		String b="ff";
		int a=(int) Long.parseLong("FFFF0000", 16);
		TwoDimensionCodeUtil.stringToImage(content, path, 500, 500, a, 0xff7d7d7d);
		System.out.println(a);
		System.out.println(0xffe1e1e1);
	}
}

生成二维码（可改变尺寸颜色）