java将链接转换为二维码

java将链接转换为二维码

上包：

	
        com.google.zxing
        core
        3.3.0
    
    
        com.google.zxing
        javase
        3.3.0
    

上代码：

package com.es.biz.common.utils;

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

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

/**

• java将链接转换为二维码

• @author ：

• @Description：

• @date ：
  */
  public class QrCodeUtils {

  public static void main(String[] args) {
  String url = “”;
  String path = FileSystemView.getFileSystemView().getHomeDirectory() + File.separator + “testQrcode”;
  System.out.println(path);
  String fileName = new SimpleDateFormat(“yyyyMMddHHmmss”).format(new Date()) + “.jpg”;
  File aa = createQrCode(url, path, fileName);
  System.out.println(aa);
  }

  public static File createQrCode(String url, String path, String fileName) {
  File file = new File(path, fileName);
  try {
  Map hints = new HashMap<>();
  hints.put(EncodeHintType.CHARACTER_SET, “UTF-8”);
  BitMatrix bitMatrix = new MultiFormatWriter().encode(url, BarcodeFormat.QR_CODE, 400, 400, hints);
  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 file;
  }

  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;
  }
  }