java-二维码编写zxing

zxing 这个是google的 
下载地址 
http://code.google.com/p/zxing/downloads/list

二维码源码案例

package com.utils;

import java.awt.image.BufferedImage;

import java.awt.image.DataBufferByte;

import java.io.File;

import java.io.IOException;

import java.util.Date;

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.common.BitMatrix;

public class UtilsQrCode {

    private static final int BLACK = 0xff000000;

    private static final int WHITE = 0xFFFFFFFF;

    /**

     * @param args

     */

    public static void main(String[] args) {

        File file = new File("C:\\Users\\huage\\Desktop\\图片\\"+new Date().getTime()+".png");

        encode("http://www.baidu.com", file, BarcodeFormat.QR_CODE, 200, 200);

    }

    /**

     * @param contents

     * @param file

     * @param format

     * @param width

     * @param height

     */

    public static  void encode(String contents, File file, BarcodeFormat format, int width, int height) {

        try {

            contents = new String(contents.getBytes("UTF-8"), "ISO-8859-1");

            Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();

            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");

            hints.put(EncodeHintType.MARGIN, 1);

            BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, format, width, height,hints);

            BufferedImage image = toBufferedImage(bitMatrix);

            writeToFile(image, "png", file);

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

    public static byte[] imgToBytes(BufferedImage image){

        if( image == null ) return new byte[0];

        byte[] data = ((DataBufferByte) image.getData().getDataBuffer()).getData();

        return data;

    }

    public static void writeToFile(BufferedImage image, String format, File file) throws IOException {

        if( image == null || file == null ) return;

        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;

    }

}