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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
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package org.lxh; |
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import com.google.zxing.common.BitMatrix; |
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import javax.imageio.ImageIO; |
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import java.io.File; |
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import java.io.OutputStream; |
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import java.io.IOException; |
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import java.awt.image.BufferedImage; |
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public final class MatrixToImageWriter { |
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private static final int BLACK = 0xFF000000; |
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private static final int WHITE = 0xFFFFFFFF; |
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private MatrixToImageWriter() {} |
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public static BufferedImage toBufferedImage(BitMatrix matrix) { |
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int width = matrix.getWidth(); |
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int height = matrix.getHeight(); |
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BufferedImage image = newBufferedImage(width, height, BufferedImage.TYPE_INT_RGB); |
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for (int x = 0; x < width; x++) { |
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for (int y = 0; y < height; y++) { |
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image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE); |
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} |
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} |
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return image; |
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} |
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public static void writeToFile(BitMatrix matrix, String format, File file) |
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throws IOException { |
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BufferedImage image = toBufferedImage(matrix); |
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if (!ImageIO.write(image, format, file)) { |
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throw new IOException("Could not write an image of format "+ format + " to " + file); |
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} |
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} |
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public static voidwriteToStream(BitMatrix matrix, String format, OutputStream stream) |
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throws IOException { |
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BufferedImage image = toBufferedImage(matrix); |
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if (!ImageIO.write(image, format, stream)) { |
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throw new IOException("Could not write an image of format " + format); |
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} |
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} |
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} |
4.借助上面的类生成二维码
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package org.lxh; |
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import java.io.File; |
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import java.util.Hashtable; |
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import com.google.zxing.BarcodeFormat; |
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import com.google.zxing.EncodeHintType; |
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import com.google.zxing.MultiFormatWriter; |
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import com.google.zxing.WriterException; |
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import com.google.zxing.common.BitMatrix; |
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public class Test { |
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/** |
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* @param args |
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* @throws Exception |
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*/ |
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public static void main(String[] args) throws Exception { |
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String text = "http://www.baidu.com"; |
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int width = 300; |
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int height = 300; |
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//二维码的图片格式 |
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String format = "gif"; |
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Hashtable hints = new Hashtable(); |
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//内容所使用编码 |
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hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); |
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BitMatrix bitMatrix = new MultiFormatWriter().encode(text, |
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BarcodeFormat.QR_CODE, width, height, hints); |
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//生成二维码 |
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File outputFile = new File("d:"+File.separator+"new.gif"); |
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MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile); |
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} |
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} |
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
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原文地址：http://www.cnblogs.com/wicrecend/p/4493272.html
