1 package util;
2
3 import java.awt.image.BufferedImage;
4
5 import java.io.File;
6 import java.io.IOException;
7 import java.io.OutputStream;
8
9 import javax.imageio.ImageIO;
10
11 import java.util.Hashtable;
12
13 import com.google.zxing.common.BitMatrix;
14 import com.google.zxing.BarcodeFormat;
15 import com.google.zxing.EncodeHintType;
16 import com.google.zxing.MultiFormatWriter;
17
18 /**
19 * 二维码的生成需要借助MatrixToImageWriter类，该类是由Google提供的，可以将该类直接拷贝到源码中使用
20 */
21 public class MatrixToImageWriter {
22 private static final int BLACK = 0xFF000000;
23 private static final int WHITE = 0xFFFFFFFF;
24
25 private MatrixToImageWriter() {
26 }
27
28 public static BufferedImage toBufferedImage(BitMatrix matrix) {
29 int width = matrix.getWidth();
30 int height = matrix.getHeight();
31 BufferedImage image = new BufferedImage(width, height,
32 BufferedImage.TYPE_INT_RGB);
33 for (int x = 0; x < width; x++) {
34 for (int y = 0; y < height; y++) {
35 image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
36 }
37 }
38 return image;
39 }
40
41 public static void writeToFile(BitMatrix matrix, String format, File file)
42 throws IOException {
43 BufferedImage image = toBufferedImage(matrix);
44 if (!ImageIO.write(image, format, file)) {
45 throw new IOException("Could not write an image of format "
46 + format + " to " + file);
47 }
48 }
49
50 public static void writeToStream(BitMatrix matrix, String format,
51 OutputStream stream) throws IOException {
52 BufferedImage image = toBufferedImage(matrix);
53 if (!ImageIO.write(image, format, stream)) {
54 throw new IOException("Could not write an image of format " + format);
55 }
56 }
57
58 public static void main(String[] args) throws Exception {
59 String text = "http://www.baidu.com"; // 二维码内容
60 int width = 300; // 二维码图片宽度
61 int height = 300; // 二维码图片高度
62 String format = "jpg";// 二维码的图片格式
63
64 Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
65 hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); // 内容所使用字符集编码
66
67 BitMatrix bitMatrix = new MultiFormatWriter().encode(text,
68 BarcodeFormat.QR_CODE, width, height, hints);
69 // 生成二维码
70 File outputFile = new File("d:" + File.separator + "new.jpg");
71 MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);
72 }
73 }
