生成二维码

最新推荐文章于 2023-05-08 20:25:59 发布

转载最新推荐文章于 2023-05-08 20:25:59 发布 · 292 阅读

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package org.plugbase.base.util;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import javax.imageio.ImageIO;
import java.io.File;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
import java.io.IOException;
import java.awt.image.BufferedImage;

public 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);
       }
   }

   public static void main(String[] args) {
       try {
           String content = "http://www.3158.com";
           String path = "D:/";

           // String path =
           // "D:/java/apache-tomcat-7.0.47/webapps/wmsDemo/QRCode";

           MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
           Map hints = new HashMap();
           // 内容所使用编码
           hints.put(EncodeHintType.CHARACTER_SET, "gb2312");
           BitMatrix bitMatrix = multiFormatWriter.encode(content,
                   BarcodeFormat.QR_CODE, 200, 200, hints);
           // 生成二维码
           File outputFile = new File(path, "ceshi.jpg");
           writeToFile(bitMatrix, "jpg", outputFile);
       } catch (Exception e) {
           e.printStackTrace();
       }
   }
}