java生成二维码

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1.java这边的话生成二维码有很多开发的jar包如zxing,qrcode.q前者是谷歌开发的后者则是小日本开发的,这里的话我使用zxing的开发包来弄
2.先下载zxing开发包,这里用到的只是core那个jar包
3.使用zxing开发还需要一个类,代码如下
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源码与演示:源码出处演示出处

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1. [图片] 11111111.png    

2. [代码][Java]代码     

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  [java]
  packageorg.lxh;
  importcom.google.zxing.common.BitMatrix;
  importjavax.imageio.ImageIO;
  importjava.io.File;
  importjava.io.OutputStream;
  importjava.io.IOException;
  importjava.awt.image.BufferedImage;
  publicfinal class MatrixToImageWriter {
  privatestatic final int BLACK = 0xFF000000;
  privatestatic final int WHITE = 0xFFFFFFFF;
  privateMatrixToImageWriter() {}
  publicstatic BufferedImage toBufferedImage(BitMatrix matrix) {
  intwidth = matrix.getWidth();
  intheight = matrix.getHeight();
  BufferedImage image = newBufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
  forintx = 0; x < width; x++) {
  forinty = 0; y < height; y++) {
  image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
  }
  }
  returnimage;
  }
  publicstatic void writeToFile(BitMatrix matrix, String format, File file)
  throwsIOException {
  BufferedImage image = toBufferedImage(matrix);
  if(!ImageIO.write(image, format, file)) {
  thrownew IOException("Could not write an image of format " + format + " to " + file);
  }
  }
  publicstatic void writeToStream(BitMatrix matrix, String format, OutputStream stream)
  throwsIOException {
  BufferedImage image = toBufferedImage(matrix);
  if(!ImageIO.write(image, format, stream)) {
  thrownew IOException("Could not write an image of format " + format);
  }
  }
  }
 
packageorg.lxh;
  importcom.google.zxing.common.BitMatrix;
  importjavax.imageio.ImageIO;
  importjava.io.File;
  importjava.io.OutputStream;
  importjava.io.IOException;
  importjava.awt.image.BufferedImage;
  publicfinal class MatrixToImageWriter {
  privatestatic final int BLACK = 0xFF000000;
  privatestatic final int WHITE = 0xFFFFFFFF;
  privateMatrixToImageWriter() {}
  publicstatic BufferedImage toBufferedImage(BitMatrix matrix) {
  intwidth = matrix.getWidth();
  intheight = matrix.getHeight();
  BufferedImage image = newBufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
  forintx = 0; x < width; x++) {
  forinty = 0; y < height; y++) {
  image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
  }
  }
  returnimage;
  }
  publicstatic void writeToFile(BitMatrix matrix, String format, File file)
  throwsIOException {
  BufferedImage image = toBufferedImage(matrix);
  if(!ImageIO.write(image, format, file)) {
  thrownew IOException("Could not write an image of format " + format + " to " + file);
  }
  }
  publicstatic void writeToStream(BitMatrix matrix, String format, OutputStream stream)
  throwsIOException {
  BufferedImage image = toBufferedImage(matrix);
  if(!ImageIO.write(image, format, stream)) {
  thrownew IOException("Could not write an image of format " + format);
  }
  }
  }
4.借助上面的类生成二维码
  [java]
  packageorg.lxh;
  importjava.io.File;
  importjava.util.Hashtable;
  importcom.google.zxing.BarcodeFormat;
  importcom.google.zxing.EncodeHintType;
  importcom.google.zxing.MultiFormatWriter;
  importcom.google.zxing.WriterException;
  importcom.google.zxing.common.BitMatrix;
  publicclass Test {
  /**
  * @param args
  * @throws Exception
  */
  publicstatic void main(String[] args) throwsException {
  String text = "http://www.ablanxue.com";
  intwidth = 300;
  intheight = 300;
  //二维码的图片格式
  String format = "gif";
  Hashtable hints = newHashtable();
  //内容所使用编码
  hints.put(EncodeHintType.CHARACTER_SET,"utf-8");
  BitMatrix bitMatrix = newMultiFormatWriter()。encode(text,
  BarcodeFormat.QR_CODE, width, height, hints);
  //生成二维码
  File outputFile = newFile("d:"+File.separator+"new.gif");
  MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);
  }
  }
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