使用谷歌zxing生成二维码

来源：互联网发布：php 判断是整数编辑：程序博客网时间：2024/06/07 00:16

最近可能是偷懒了，也没更新自己的博客（其实是在帮朋友做一个微信扫码支付接口），忙的没有时间更新博客。

在做这些东西的时候也学到了一些东西。
今天就来讲讲用谷歌的zxing来生成一个二维码：
首先需要两个jar包：
这里写图片描述
然后我们给出我们的code：

package testJavaSE;import java.io.File;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.common.BitMatrix;public class QRcode{    public static void main(String[] args) {        try {             String content = "我的电话：110";             String path = "F:/testImage";             MultiFormatWriter multiFormatWriter = new MultiFormatWriter();             Map hints = new HashMap();             hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");             BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 400, 400,hints);             File file1 = new File(path,"我的信息.jpg");             MatrixToImageWriter.writeToFile(bitMatrix, "jpg", file1);         } catch (Exception e) {             e.printStackTrace();         }    }}

里面使用到了一个MatrixToImageWriter类，这个是由Google提供工具类：

package testJavaSE;import com.google.zxing.common.BitMatrix;import javax.imageio.ImageIO;import java.io.File;import java.io.OutputStream;import java.io.IOException;import java.awt.image.BufferedImage;public final class MatrixToImageWriter {  private static final int BLACK = 0xFF000000;  private static final int WHITE = 0xFFFFFFFF;  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) ? 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);    }  }}

阅读全文

1 0