1.java这边的话生成二维码有很多开发的jar包如zxing,qrcode.q前者是谷歌开发的后者则是小日本开发的，这里的话我使用zxing的开发包来弄
2.先下载zxing开发包，这里用到的只是core那个jar包
3.使用zxing开发还需要一个类，代码如下
01 |
package org.lxh; |
02 |
import com.google.zxing.common.BitMatrix; |
03 |
04 |
import javax.imageio.ImageIO; |
05 |
import java.io.File; |
06 |
import java.io.OutputStream; |
07 |
import java.io.IOException; |
08 |
import java.awt.image.BufferedImage; |
09 |
10 |
11 |
public final class MatrixToImageWriter { |
12 |
13 |
private static final int BLACK = 0xFF000000; |
14 |
private static final int WHITE = 0xFFFFFFFF; |
15 |
16 |
private MatrixToImageWriter() {} |
17 |
18 |
19 |
public static BufferedImage toBufferedImage(BitMatrix matrix) { |
20 |
int width = matrix.getWidth(); |
21 |
int height = matrix.getHeight(); |
22 |
BufferedImage image = newBufferedImage(width, height, BufferedImage.TYPE_INT_RGB); |
23 |
for (int x = 0; x < width; x++) { |
24 |
for (int y = 0; y < height; y++) { |
25 |
image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE); |
26 |
} |
27 |
} |
28 |
return image; |
29 |
} |
30 |
31 |
32 |
public static void writeToFile(BitMatrix matrix, String format, File file) |
33 |
throws IOException { |
34 |
BufferedImage image = toBufferedImage(matrix); |
35 |
if (!ImageIO.write(image, format, file)) { |
36 |
throw new IOException("Could not write an image of format "+ format + " to " + file); |
37 |
} |
38 |
} |
39 |
40 |
41 |
public static voidwriteToStream(BitMatrix matrix, String format, OutputStream stream) |
42 |
throws IOException { |
43 |
BufferedImage image = toBufferedImage(matrix); |
44 |
if (!ImageIO.write(image, format, stream)) { |
45 |
throw new IOException("Could not write an image of format " + format); |
46 |
} |
47 |
} |
48 |
49 |
} |
4.借助上面的类生成二维码
01 |
package org.lxh; |
02 |
03 |
import java.io.File; |
04 |
import java.util.Hashtable; |
05 |
06 |
import com.google.zxing.BarcodeFormat; |
07 |
import com.google.zxing.EncodeHintType; |
08 |
import com.google.zxing.MultiFormatWriter; |
09 |
import com.google.zxing.WriterException; |
10 |
import com.google.zxing.common.BitMatrix; |
11 |
12 |
public class Test { |
13 |
14 |
/** |
15 |
* @param args |
16 |
* @throws Exception |
17 |
*/ |
18 |
public static void main(String[] args) throws Exception { |
19 |
String text = "http://www.baidu.com"; |
20 |
int width = 300; |
21 |
int height = 300; |
22 |
//二维码的图片格式 |
23 |
String format = "gif"; |
24 |
Hashtable hints = new Hashtable(); |
25 |
//内容所使用编码 |
26 |
hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); |
27 |
BitMatrix bitMatrix = new MultiFormatWriter().encode(text, |
28 |
BarcodeFormat.QR_CODE, width, height, hints); |
29 |
//生成二维码 |
30 |
File outputFile = new File("d:"+File.separator+"new.gif"); |
31 |
MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile); |
32 |
33 |
} |
34 |
35 |
} |
text就是二维码的内容里这里可以使普通的文字也可以是链接，很简单吧最后把生成的二维码图片给大家
