java基於Google開發的zxing包開發的二維碼產生工具

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不得不說,二維碼的應用越來越廣泛了。廢話不多說了。。

此處採用的jar不多,只用zxing包裡面的core.jar包即可,大家自行下載,

如果是百度雲端硬碟,地址為:http://pan.baidu.com/s/1eQeWFaq

以後很多的部落格資源將會更新到這個地址中,大家盡量把資源轉移自己的盤,防止連結某天突然掛了。

執行個體:

genQRCode(String content,String url),其中url絕對路徑,就是這個類的調用方法,傳回值二維碼檔案名稱,產生png格式(如需其他,自行更改),開頭已經定義了圖片大小為300*300

 

import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.io.OutputStream;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Hashtable;import javax.imageio.ImageIO;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 MatrixToImageWriter {       private static final int BLACK = 0xFF000000;    private static final int WHITE = 0xFFFFFFFF;    private static final int WIDTH = 300;   private static final int HEIGHT = 300;       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);      }    }       //產生二維碼圖片content:內容 ,url:產生路徑   public static String genQRCode(String content,String url){            //驗證是否存在檔案夾        CreateDir.createDir(url);              String filename = null;     //二維碼的圖片格式        String format = "png";        Hashtable hints = new Hashtable();        //內容所使用編碼        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");        BitMatrix bitMatrix;        try {            bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints);                        //產生名字,如果有自己的特有規則,以下3行自行更改            int s=(int)(Math.random()*10000);//整數類型            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");                filename = "file_" + sdf.format(new Date())+s +"." + format ;                        //產生二維碼             File outputFile = new File(url+File.separator+filename);             MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);         } catch (WriterException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        return filename;   }   }

 

java基於Google開發的zxing包開發的二維碼產生工具

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