生成简单的二维码

生成的效果

1. MatrixToImageWriter.java

package demo;
import java.awt.Color;
import java.awt.image.BufferedImage;
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 static final int BLUE = Color.BLUE.getBlue();
  private static final int GREEN = Color.GREEN.getGreen();

  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) ? BLUE : 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 logoWriteToFile(BitMatrix matrix, String format, File 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);
    }
  }
}

2.Test.java(二维码的生成）

package demo;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
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 Test {

public static void main(String[] args) throws WriterException {
MultiFormatWriter formatWirter = new MultiFormatWriter();
String content = "I love you";
Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");  // 设置编码
BitMatrix bitmatrix = formatWirter.encode(content, BarcodeFormat.QR_CODE, 300, 300, hints);  
File file = new File("d:/1.jpg");
try {
MatrixToImageWriter.writeToFile(bitmatrix, "jpg", file);
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("..........................完成！！");
}
}