JAVA二维码生成

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.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; 
import com.sdy.huge.utils.file.AccessoryConfig;
 
/**
* @author ygd
* 
*/ 
public class CodeFactory { 
    // 图片宽度的一般 
    private static final int IMAGE_WIDTH = 80; 
    private static final int IMAGE_HEIGHT = 80; 
    private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2; 
    private static final int FRAME_WIDTH = 2; 
 
    // 二维码写码器 
    private static MultiFormatWriter mutiWriter = new MultiFormatWriter(); 
 
    public static void encode(String content, int width, int height, 
            String srcImagePath, String destImagePath) { 
        try { 
        File f = new File(AccessoryConfig.path_absolute+AccessoryConfig.mem_ercod);
     //不存在就創建
     if(!f.exists()){
             f.mkdirs();
             }
            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 { 
        // 读取源图像 
        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++) { 
                // 读取图片 
                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]; 
                }  
                // 在图片四周形成边框 
                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 > 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) 
                        || (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; 
                } else { 
                    // 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) ? 0xff000000 
                            : 0xfffffff; 
                } 
            } 
        } 
 
        BufferedImage image = new BufferedImage(width, height, 
                BufferedImage.TYPE_INT_RGB); 
        image.getRaster().setDataElements(0, 0, width, height, pixels); 
 
        return image; 
    } 
 
    /**
     * 把传入的原始图像按高度和宽度进行缩放，生成符合要求的图标
     * 
     * @param srcImageFile
     *            源文件地址
     * @param height
     *            目标高度
     * @param width
     *            目标宽度
     * @param hasFiller
     *            比例不对时是否需要补白：true为补白; false为不补白;
     * @throws IOException
     */ 
    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) { 
    CodeFactory 
                .encode("http://www.baidu.com", 
                        300, 300, "F:\\123.png", "F:\\456.jpg"); 
    } 
}