以下是代码

package com.paliec.test.qrcodegenerator;

import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatWriter; import com.google.zxing.common.BitMatrix; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.Map; import javax.imageio.ImageIO; /**  * Hello world!  *  */ public class App {          private static final int BLACK = 0xFF000000;     private static final int WHITE = 0xFFFFFFFF;          private 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;     }     private static void writeToFile(BitMatrix matrix, String format, File file)             throws IOException {         BufferedImage image = App.toBufferedImage(matrix);         if (!ImageIO.write(image, format, file)) {             throw new IOException("Could not write an image of format " + format + " to " + file);         }     }     public static void main(String[] args) {         try {             String content = "http://my.oschina.net/mogralee/blog/测试";             String path = "G:/mobileProject/practice/qrcode";             MultiFormatWriter multiFormatWriter = new MultiFormatWriter();             Map hints = new HashMap();             hints.put(EncodeHintType.CHARACTER_SET, " utf-8");        //红色部分一定要是小写，不然会产生无法识别的问题             BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 200, 200, hints);             File file1 = new File(path, "pic.jpg");             App.writeToFile(bitMatrix, "jpg", file1);             System.out.println("生成成功");         } catch (Exception e) {             e.printStackTrace();         }     } }