java生成二维码

1. [图片] 11111111.png    

java生成二维码

 [java]
   package org.lxh;
   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);
  }
  }
  }
 
package org.lxh;
   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);
  }
  }
  }
4 .借助上面的类生成二维码
  [java]
   package org.lxh;
   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.WriterException;
   import com.google.zxing.common.BitMatrix;
   public class Test {
   /**
  * @param args
  * @throws Exception
  */
   public static void main(String[] args) throws Exception {
  String text = "http://www.ablanxue.com" ;
   int width = 300 ;
   int height = 300 ;
   //二维码的图片格式
  String format = "gif" ;
  Hashtable hints = new Hashtable();
   //内容所使用编码
  hints.put(EncodeHintType.CHARACTER_SET, "utf-8" );
  BitMatrix bitMatrix = new MultiFormatWriter()。encode(text,
  BarcodeFormat.QR_CODE, width, height, hints);
   //生成二维码
  File outputFile = new File( "d:" +File.separator+ "new.gif" );
  MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);
  }
  }
 

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