google的zxing二维码生成

二维码生成有很多sdk，但本人认为zxing包最好用，以下就是二维码生成的类

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;  

import org.apache.commons.lang3.StringUtils;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;  

/**
 * @ClassName: GenerateQRCode
 * @Description: 生成二维码
 * @author
 * @company
 * @date 2015-3-10
 * @version V1.0
 */
public final class QRCodeUtils {  

    private static final QRCodeUtils instance = new QRCodeUtils();  

    private QRCodeUtils() {
    }  

    public static QRCodeUtils getInstance() {
        return instance;
    }  

    private static final int BLACK = 0xff000000;
    private static final int WHITE = 0xFFFFFFFF;  

    private static final int WIDTH = 400;		//二维码宽
    private static final int HEIGHT = 400;		//二维码高

    private static final int totalWidth = 400;	//总宽
    private static final int totalHeight = 600;	//总高

    int fontHeight=20,lineHeight=20;			//字高，行高
    /**
     * @Title: generate
     * @Description: 生成二维码
     * @param assetsName
     *            二维码图片名称
     * @param params
     *            二维码信息
     * @param width
     *            生成的图片的宽
     * @param height
     *            生成的图片的高
     * @param path
     *            二维码图片存放目录
     * @throws Exception
     * @return String 二维码图片名称
     * @author
     * @date 2012-11-9
     */
    public String generate(String nick,String assetsName, String params, String path, String fileName) throws Exception {  

    	File file = new File(path);  

        if (!file.exists()) {
            file.mkdirs();
        }  

        //获取logo文件
        String head=path+"logo.png";

        // 二维码图片存放路径
        path = path.concat(fileName);
        file = new File(path);
        if (!file.exists()) {
            file.createNewFile();
        }  

        BitMatrix bitMatrix = new MultiFormatWriter().encode(params,
                BarcodeFormat.QR_CODE, WIDTH, HEIGHT);  

        //二维码的buffered
        BufferedImage bufImgCode = toBufferedImage(bitMatrix);

        //构造新图像
        BufferedImage bufImg = new BufferedImage(totalWidth, totalHeight, BufferedImage.TYPE_INT_RGB); // 图片的大小
        Graphics2D gs = bufImg.createGraphics();
        gs.setBackground(Color.WHITE);
        gs.clearRect(0, 0, totalWidth, totalHeight);
        gs.setColor(Color.BLACK);

        //把二维码buffered画到gs里面
        if(bufImgCode!=null)
        	gs.drawImage(bufImgCode, null, 0, 100);
        //head
        Image img = ImageIO.read(new File(head));
        //实例化一个Image对象。             
        gs.drawImage(img, 40, 30, null);
        if(StringUtils.isNotBlank(nick)){
        	gs.setFont(new Font("微软雅黑", Font.BOLD, 20));
            gs.drawString(nick,160, 80);
            gs.setFont(new Font("微软雅黑", Font.BOLD, 16));
            gs.drawString("为您推荐最热门的手机业务",160, 110);

        }

        //把文字写到二维码下面
        if (StringUtils.isNotBlank(assetsName)) {
            gs.setFont(new Font("微软雅黑", Font.BOLD, 20));
            gs.drawString("欢迎扫一扫二维码",50, 500);
            gs.drawString("办理"+assetsName,50, 540);
        }

        ImageIO.write(bufImg, "png", file);
        return fileName;
    }  

    public static void writeToFile(BitMatrix matrix, String format, File file)
            throws Exception {  

        BufferedImage image = toBufferedImage(matrix);  

        ImageIO.write(image, format, file);  

    }  

    public static BufferedImage toBufferedImage(BitMatrix matrix) {  

        int width = matrix.getWidth();  

        int height = matrix.getHeight();  

        BufferedImage image = new BufferedImage(width, height,
                BufferedImage.TYPE_INT_ARGB);  

        for (int x = 0; x < width; x++) {  

            for (int y = 0; y < height; y++) {  

                image.setRGB(x, y, matrix.get(x, y) == true ? BLACK : WHITE);  

            }  

        }  

        return image;
    }  

    public static void main(String[] args) {
    	 String path = "E:\\";
         try {
        	 QRCodeUtils.getInstance().generate("XXX","移动流量数据包50元","www.baidu.com", path,"90006.png");
             System.out.println("生成二维码成功");  

         } catch (WriterException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         } catch (Exception e) {
             e.printStackTrace();
         }
	}
}