java生成自己的微信二維碼
阿新 • • 發佈:2018-12-31
根據上一篇得到的資料,我們可以生成自己的微信二維碼:
import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.io.OutputStream; import java.util.Hashtable; import javax.imageio.ImageIO; import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatWriter; import com.google.zxing.common.BitMatrix; public class QREncode { private static final int BLACK = 0xFF000000; private static final int WHITE = 0xFFFFFFFF; private QREncode() {} 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); } } @SuppressWarnings({ "unchecked", "rawtypes" }) public static void main(String[] args) throws Exception { String text = "http://weixin.qq.com/r/h685IaDEkf3ureRC9-qV"; int width = 300; int height = 300; String format = "png"; Hashtable hints = new Hashtable(); hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hints); File outputFile = new File("d:"+File.separator+"qr.png"); QREncode.writeToFile(bitMatrix, format, outputFile); } }
執行結果:
jar包及原始碼:QREncode
下一篇將介紹生成帶圖片的二維碼。