zxing-core-二维码生成方法

package com.kmt.test;

import java.io.File;
import java.util.Hashtable;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.kmt.channel.util.MatrixToImageWriter;

public class Testerwm {

public static void main(String[] args) {
try {
           
     String content = "120605181003;http://www.cnblogs.com/jtmjx";
     String path = "f:/testImage";
    
     MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
    
     Hashtable hints = new Hashtable();
     hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
     BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 400, 400,hints);
     File file1 = new File(path,"a1.jpg");//jpg  png
     MatrixToImageWriter.writeToFile(bitMatrix, "jpg", file1);
     System.exit(0);
} catch (Exception e) {
     e.printStackTrace();
}
}
}




package com.kmt.channel.util;
import com.google.zxing.common.BitMatrix;

import javax.imageio.ImageIO;
import java.io.File;
import java.io.OutputStream;
import java.io.IOException;
import java.awt.image.BufferedImage;


public final class MatrixToImageWriter {

   private static final int BLACK = 0xFF000000;
   private static final int WHITE = 0xFFFFFFFF;

   private MatrixToImageWriter() {}

  
   public static BufferedImage toBufferedImage(BitMatrix matrix) {
     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);
       }
     }
     return image;
   }

  
   public static void writeToFile(BitMatrix matrix, String format, File file)
       throws IOException {
     BufferedImage image = toBufferedImage(matrix);
     if (!ImageIO.write(image, format, file)) {
       throw new IOException("Could not write an image of format " + format + " to " + file);
     }
   }

  
   public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
       throws IOException {
     BufferedImage image = toBufferedImage(matrix);
     if (!ImageIO.write(image, format, stream)) {
       throw new IOException("Could not write an image of format " + format);
     }
   }

}