java链接生成二维码_java实现滑动验证码源代码

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package cn.itcast.action;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;
import javax.swing.filechooser.FileSystemView;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;

public class QrCodeUtil {

public static void main(String[] args) {

String url = “http://t.cn/RdZMeZJ111111”;
String path = FileSystemView.getFileSystemView().getHomeDirectory() + File.separator + “testQrcode”;
System.out.println(path);
String fileName = new SimpleDateFormat(“yyyyMMddHHmmss”).format(new Date()) + “.jpg”;
createQrCode(url, path, fileName);
}

public static String createQrCode(String url, String path, String fileName) {

try {

Map<EncodeHintType, String> hints = new HashMap<>();
hints.put(EncodeHintType.CHARACTER_SET, “UTF-8”);
BitMatrix bitMatrix = new MultiFormatWriter().encode(url, BarcodeFormat.QR_CODE, 400, 400, hints);
File file = new File(path, fileName);
if (file.exists() || ((file.getParentFile().exists() || file.getParentFile().mkdirs()) && file.createNewFile())) {

writeToFile(bitMatrix, “jpg”, file);
System.out.println(“测试完成：” + file);
}

} catch (Exception e) {

e.printStackTrace();
}
return null;
}

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);
}
}

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);
}
}

private static final int BLACK = 0xFF000000;
private static final int WHITE = 0xFFFFFFFF;

private 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;
}

}