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
2. [代码][Java]代码
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[java] package org.lxh; import com.google.zxing.common.BitMatrix; import javax.imageio.ImageIO; import java.io.File; import java.io.OutputStream; 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); } } } package org.lxh; import com.google.zxing.common.BitMatrix; import javax.imageio.ImageIO; import java.io.File; import java.io.OutputStream; 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); } } } 4 .借助上面的类生成二维码 [java] package org.lxh; import java.io.File; import java.util.Hashtable; import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatWriter; import com.google.zxing.WriterException; import com.google.zxing.common.BitMatrix; public class Test { /** * @param args * @throws Exception */ public static void main(String[] args) throws Exception { String text = "http://www.ablanxue.com" ; int width = 300 ; int height = 300 ; //二维码的图片格式 String format = "gif" ; Hashtable hints = new Hashtable(); //内容所使用编码 hints.put(EncodeHintType.CHARACTER_SET, "utf-8" ); BitMatrix bitMatrix = new MultiFormatWriter()。encode(text, BarcodeFormat.QR_CODE, width, height, hints); //生成二维码 File outputFile = new File( "d:" +File.separator+ "new.gif" ); MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile); } } |