java 生成带Logo的二维码

java 生成带Logo的微信二维码

下载QR二维码包，zxing.jar 包
不废话直接上代码

pom.xml

<!-- 条形码、二维码生成 -->
		<dependency>
			<groupId>com.google.zxing</groupId>
			<artifactId>core</artifactId>
			<version>2.2</version>
		</dependency>
		<dependency>
			<groupId>com.google.zxing</groupId>
			<artifactId>javase</artifactId>
			<version>2.2</version>
		</dependency>

工程代码2个核心Java文件如下：

BufferedImageLuminanceSource.java

package xxx.utils;

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;

import com.google.zxing.LuminanceSource;

public class BufferedImageLuminanceSource extends LuminanceSource{
	
	private final BufferedImage image;
	private final int left;
	private final int top;
 
	public BufferedImageLuminanceSource(BufferedImage image) {
		this(image, 0, 0, image.getWidth(), image.getHeight());
	}
 
	/**
	 * 构造方法
	 * @param image
	 * @param left
	 * @param top
	 * @param width
	 * @param height
	 */
	public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {
		super(width, height);
 
		int sourceWidth = image.getWidth();
		int sourceHeight = image.getHeight();
		if (left + width > sourceWidth || top + height > sourceHeight) {
			throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
		}
 
		for (int y = top; y < top + height; y++) {
			for (int x = left; x < left + width; x++) {
				if ((image.getRGB(x, y) & 0xFF000000) == 0) {
					image.setRGB(x, y, 0xFFFFFFFF); // = white
				}
			}
		}
 
		this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);
		this.image.getGraphics().drawImage(image, 0, 0, null);
		this.left = left;
		this.top = top;
	}
 
	
	@Override
	public byte[] getRow(int y, byte[] row) {//从底层平台的位图提取一行（only one row）的亮度数据值
		if (y < 0 || y >= getHeight()) {
			throw new IllegalArgumentException("Requested row is outside the image: " + y);
		}
		int width = getWidth();
		if (row == null || row.length < width) {
			row = new byte[width];
		}
		image.getRaster().getDataElements(left, top + y, width, 1, row);
		return row;
	}
 
	@Override
	public byte[] getMatrix() {///从底层平台的位图提取亮度数据值
		int width = getWidth();
		int height = getHeight();
		int area = width * height;
		byte[] matrix = new byte[area];
		image.getRaster().getDataElements(left, top, width, height, matrix);
		return matrix;
	}
 
	@Override
	public boolean isCropSupported() {//是否支持裁剪
		return true;
	}
 
	/**
	 * 返回一个新的对象与裁剪的图像数据。实现可以保存对原始数据的引用，而不是复制。
	 */
	@Override
	public LuminanceSource crop(int left, int top, int width, int height) {
		return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);
	}
	
	@Override
	public boolean isRotateSupported() {//是否支持旋转
		return true;
	}
 
	@Override
	public LuminanceSource rotateCounterClockwise() {//逆时针旋转图像数据的90度，返回一个新的对象。
		int sourceWidth = image.getWidth();
		int sourceHeight = image.getHeight();
		AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);
		BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);
		Graphics2D g = rotatedImage.createGraphics();
		g.drawImage(image, transform, null);
		g.dispose();
		int width = getWidth();
		return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);
	}
}

QRCodeUtil.java

package xxx.utils;


import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Random;

import javax.imageio.ImageIO;
 

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;



public class QRCodeUtil {
	
private static final String CHARSET = "utf-8";
private static final String FORMAT_NAME = "JPG";
// 二维码尺寸
private static final int QRCODE_SIZE = 300;
// LOGO宽度
private static final int WIDTH = 60;
// LOGO高度
private static final int HEIGHT = 60;


/**
 * 生成二维码
 * @param content	源内容
 * @param imgPath	生成二维码保存的路径
 * @param needCompress	是否要压缩
 * @return		返回二维码图片
 * @throws Exception
 */
private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception {
	Hashtable hints = new Hashtable();
	hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
	hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
	hints.put(EncodeHintType.MARGIN, 1);
	BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE,
			hints);
	int width = bitMatrix.getWidth();
	int height = bitMatrix.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, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
		}
	}
	if (imgPath == null || "".equals(imgPath)) {
		return image;
	}
	// 插入图片
	QRCodeUtil.insertImage(image, imgPath, needCompress);
	return image;
}

/**
 * 在生成的二维码中插入图片
 * @param source
 * @param imgPath
 * @param needCompress
 * @throws Exception
 */
private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {
	File file1 = new File(imgPath);
	if (!file1.exists()) {
		System.err.println("" + imgPath + "   该文件不存在！");
		return;
	}
	Image src = ImageIO.read(new File(imgPath));
	int width = src.getWidth(null);
	int height = src.getHeight(null);
	if (needCompress) { // 压缩LOGO
		if (width > WIDTH) {
			width = WIDTH;
		}
		if (height > HEIGHT) {
			height = HEIGHT;
		}
		Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
		BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		Graphics g = tag.getGraphics();
		g.drawImage(image, 0, 0, null); // 绘制缩小后的图
		g.dispose();
		src = image;
	}
	// 插入LOGO
	Graphics2D graph = source.createGraphics();
	int x = (QRCODE_SIZE - width) / 2;
	int y = (QRCODE_SIZE - height) / 2;
	graph.drawImage(src, x, y, width, height, null);
	Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
	graph.setStroke(new BasicStroke(3f));
	graph.draw(shape);
	graph.dispose();
}

/**
 * 生成带logo二维码，并保存到磁盘
 * @param content
 * @param imgPath	logo图片
 * @param destPath
 * @param needCompress
 * @throws Exception
 */
public static void encode(String content, String imgPath, String destPath, boolean needCompress,String file) throws Exception {
	BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
	mkdirs(destPath);
	
	ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
}

public static void mkdirs(String destPath) {
	File file = new File(destPath);
	// 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir。(mkdir如果父目录不存在则会抛出异常)
	if (!file.exists() && !file.isDirectory()) {
		file.mkdirs();
	}
}

public static void encode(String content, String imgPath, String destPath,String file) throws Exception {
	QRCodeUtil.encode(content, imgPath, destPath, false ,file);
}

public static void encode(String content, String destPath, boolean needCompress,String file) throws Exception {
	QRCodeUtil.encode(content, null, destPath, needCompress,file);
}

public static void encode(String content, String destPath,String file) throws Exception {
	QRCodeUtil.encode(content, null, destPath, false,file);
}

public static void encode(String content, String imgPath, OutputStream output, boolean needCompress)
		throws Exception {
	BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
	ImageIO.write(image, FORMAT_NAME, output);
}

public static void encode(String content, OutputStream output) throws Exception {
	QRCodeUtil.encode(content, null, output, false);
}


/**
 * 从二维码中，解析数据
 * @param file	二维码图片文件
 * @return	 返回从二维码中解析到的数据值
 * @throws Exception
 */
public static String decode(File file) throws Exception {
	BufferedImage image;
	image = ImageIO.read(file);
	if (image == null) {
		return null;
	}
	BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
	BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
	Result result;
	Hashtable hints = new Hashtable();
	hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
	result = new MultiFormatReader().decode(bitmap, hints);
	String resultStr = result.getText();
	return resultStr;
}

public static String decode(String path) throws Exception {
	return QRCodeUtil.decode(new File(path));
}

}

Controller

String textt = "www.baidu.com";//二维码的内容
String logo = path+"/logo.png";//logo的路径
String file = new Random().nextInt(99999999) + ".jpg";//生成随机文件名
System.out.println(file.toString()+"文件名");

QRCodeUtil.encode(textt,logo,path,true,file);//path 二维码保存的服务器的路径

到这二维码就生成了 剩下的你想干啥干啥!!!