Java 的二维码的输出

最新推荐文章于 2025-05-04 11:46:56 发布

原创最新推荐文章于 2025-05-04 11:46:56 发布 · 830 阅读

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这篇博客介绍了如何在Java中利用com.google.zxing库生成二维码。读者将学习到如何获取和使用这个库来创建二维码，适用于Java开发者进行二维码相关开发。

package com.lixiao;
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.Hashtable;
import java.util.Map;
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);
     }
   }
 public static void main(String[] args) {
	 try {
         
	     String content = "120605181003;http://www.cnblogs.com/jtmjx";
	     String path = "D:/";
	     
	     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,"树木.jpg");
	     MatrixToImageWriter.writeToFile(bitMatrix, "jpg", file1);
	     
	 } catch (Exception e) {
	     e.printStackTrace();
	 }
}
 }

原先的网址记不清了

需要下载的包com.google.zxing

地址：http://repo1.maven.org/maven2/com/google/zxing/core/，可下载最新的版本：

3.3.2/                                            2018-01-31 03:55         -