Java 通过Zxing生成二维码

Java 通过Zxing生成二维码１．基本类提供二维码生成工具类package com.green.util;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import javax.imageio.ImageIO;
import com.google.zxing.common.BitMatrix;
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 byte[] writeToStream（BitMatrix matrix, String format） throws IOException { ByteArrayOutputStream stream=new ByteArrayOutputStream（）; BufferedImage image = toBufferedImage（matrix）; if （！ImageIO.write（image, format, stream）） { throw new IOException（"Could not write an image of format " + format）; } return stream.toByteArray（）; }}２．调用工具方法获取图片的二进制
package com.green.util; import java.io.File;import java.io.IOException;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; /** * @author maybo * */public class QrCodeGenerator { public static byte[] build（String content） throws IOException, WriterException { int width = 300; int height = 300; //??????????? String format = "gif"; Hashtable hints = new Hashtable（）; //????????ñ??? hints.put（EncodeHintType.CHARACTER_SET, "utf-8"）; BitMatrix bitMatrix = new MultiFormatWriter（）.encode（content, BarcodeFormat.QR_CODE, width, height, hints）; return MatrixToImageWriter.writeToStream（bitMatrix, format）; }}本文永久更新链接地址：http://www.linuxidc.com/Linux/2016-02/128325.htm