You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
47 lines
1.5 KiB
47 lines
1.5 KiB
package util;
|
|
|
|
import java.awt.image.BufferedImage;
|
|
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.WriterException;
|
|
import com.google.zxing.common.BitMatrix;
|
|
|
|
public class QRCodeUtil {
|
|
|
|
private static final int BLACK = 0xFF000000;
|
|
private static final int WHITE = 0xFFFFFFFF;
|
|
|
|
public static void genGR(String website, OutputStream output) throws WriterException, IOException {
|
|
int width = 300;
|
|
int height = 300;
|
|
String format = "jpg";
|
|
Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
|
|
//Hashtable hints = new Hashtable();
|
|
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
|
|
BitMatrix bm = new MultiFormatWriter().encode(website, BarcodeFormat.QR_CODE, width, height, hints);
|
|
|
|
BufferedImage image = toImage(bm);
|
|
ImageIO.write(image, format, output); //把二维码写到response的输出流
|
|
}
|
|
|
|
private static BufferedImage toImage(BitMatrix bm) {
|
|
int width = bm.getWidth();
|
|
int height = bm.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, bm.get(x, y) ? BLACK : WHITE);
|
|
}
|
|
}
|
|
return image;
|
|
}
|
|
|
|
}
|