二维码生成

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;

import javax.imageio.ImageIO;

import org.apache.log4j.Logger;

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;

public final class MatrixCodeUtil{
	private static Logger logger = Logger.getLogger(MatrixCodeUtil.class);
	private static final int BLACK = 0xFF000000;
	private static final int WHITE = 0xFFFFFFFF;
	
	public static BitMatrix createQRCode(String content, int width, int height){  
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();     
        //设置字符编码  
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");    
        // 指定纠错等级  
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);  
        BitMatrix matrix = null;    
        try {    
            matrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);   
        } catch (WriterException e) { 
        	logger.error(e);
            e.printStackTrace();    
        }  
        return matrix;  
    } 
	
	public static void writeToFile(BitMatrix matrix, String format, File file)
			throws IOException {
		int width = matrix.getWidth();
		int height = matrix.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, matrix.get(x, y) ? BLACK : WHITE);
			}
		}
		
		ImageIO.write(image, format, file);

	}
	
	public static void addLogoWriteToFile(BitMatrix matrix, String targetPath, String logoPath, int logoPart){
		int width = matrix.getWidth();
		int height = matrix.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, matrix.get(x, y) ? BLACK : WHITE);
			}
		}
		BufferedImage logo = null;
		try {
			logo = ImageIO.read(new File(logoPath));
		} catch (IOException e) {
			e.printStackTrace();
		}  
        Graphics2D g = image.createGraphics();  
        //考虑到logo照片贴到二维码中，建议大小不要超过二维码的1/5;  
        int logoWidth = width / logoPart;  
        int logoHeight = height / logoPart;  
        //logo起始位置，此目的是为logo居中显示  
        int x = (height - logoWidth) / 2;  
        int y = (height - logoHeight) / 2;  
        //绘制图  
        g.drawImage(logo, x, y, logoWidth, logoHeight, null);  
          
        g.setStroke(new BasicStroke(2));  
        g.setColor(Color.GRAY);  
        g.drawRect(x, y, logoWidth, logoHeight);  
          
        g.dispose();  
        
        try {
			ImageIO.write(image, "jpg", new File(targetPath));
		} catch (IOException e) {
			logger.error(e);
			e.printStackTrace();
		}  
        
	}
	
	public static void main(String [] arr){
		try {
            
		     String content = "['name':'test','company':'11111']";
		     String targetPath = "e:/Desktop/test.jpg";
		     String logoPath = "e:/Desktop/logo_comp.jpg";
		     int width = 400;
		     int height = 400;
		     int logoPart = 6;
		     
		     BitMatrix matrix = MatrixCodeUtil.createQRCode(content, width, height);
		     
		     MatrixCodeUtil.addLogoWriteToFile(matrix, targetPath, logoPath, logoPart);
		     
		 } catch (Exception e) {
		     e.printStackTrace();
		 }
	}

	
}