logo二維碼

1.不帶圖片的二維碼

    導入jar包：

<!-- 二維碼 -->
		<dependency>
			<groupId>com.google.zxing</groupId>
			<artifactId>core</artifactId>
			<version>3.1.0</version>
		</dependency>
		<dependency>
			<groupId>com.google.zxing</groupId>
			<artifactId>javase</artifactId>
			<version>3.1.0</version>
		</dependency>
		<dependency>
			<groupId>net.glxn</groupId>
			<artifactId>qrgen</artifactId>
			<version>1.4</version>
		</dependency>
		<!-- 二維碼完畢 -->

    直接上源代碼：

public class QRCode {
	public static void main(String []args)throws Exception{   
        String text = "這是內容";   
        int width = 100;   
        int height = 100;   
        String format = "png";   
        Hashtable hints= new Hashtable();   
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");   
         BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height,hints);   
         File outputFile = new File("d:"+File.separator+"kk.png");   
         MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);   

    }   
}

帶logo的二維碼：

導入jar包，

下面這句是去白邊的，沒有這句會出現白邊

hint.put(EncodeHintType.MARGIN, 0);

package xm.zjl.util;

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.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.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
 * 帶logo的二維碼
 * 
 * @author Administrator
 *
 */
public class PictureQRCode {

	private static final int IMAGE_WIDTH = 200;
	private static final int IMAGE_HEIGHT = 200;
	private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2;
	private static final int FRAME_WIDTH = 2;

	private static MultiFormatWriter mutiWriter = new MultiFormatWriter();

	public static void encode(String content, int width, int height, String srcImagePath,
			String destImagePath) {
		try {
			ImageIO.write(genBarcode(content, width, height, srcImagePath), "png", new File(
					destImagePath));
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static BufferedImage genBarcode(String content, int width, int height,
			String srcImagePath) throws Exception {
		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);
		//去白邊
                hint.put(EncodeHintType.MARGIN, 0);
		// 生成二維碼
		BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hint);

		// 二維矩陣轉爲一維像素數組
		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++) {
				// 讀取圖片
				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];
				}
				// 在圖片四周形成邊框
				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 {
					// 此處可以修改二維碼的顏色，可以分別制定二維碼和背景的顏色；
					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;

	}

	private static BufferedImage scale(String srcImageFile, int height, int width, boolean hasFiller)
			throws Exception {
		double ratio = 0.0; // 縮放比例
		File file = new File(srcImageFile);
		BufferedImage srcImage = ImageIO.read(file);
		Image destImage = srcImage.getScaledInstance(width, height, BufferedImage.SCALE_SMOOTH);
		// 計算比例
		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) {// 補白
			BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
			Graphics2D graphic = image.createGraphics();
			graphic.setColor(Color.RED);
			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) {
		PictureQRCode.encode("http://weixin.xiaoma.com/subscribe?channelid=112", 800, 800, "d:\\weixin.png", "d:"+File.separator+"11"+File.separator+"weixin-1.png");
	}
}