版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/qq_26230421/article/details/84958387
前言
本文是通过google.zxing生成的二维码
兄弟篇(使用QRCode):java代码生成二维码(一)
JAR包
只给代码,不给jar包就是耍流氓n(*≧▽≦*)n
产生二维码需要用到jar包:
链接:点我下载
密码:wfvl
生成图片的接口
package a;
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 class MatrixToImageWriter {
private static final int RED = 0xFFDC143C;
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) ? RED : 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);
}
}
}
测试
package a;
import java.io.File;
import java.util.Hashtable;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
public class Test {
public static void main(String[] args) throws Exception{
String text = "https://blog.csdn.net/qq_26230421";//二维码的内容
int width = 400;
int height = 400;
String format = "png";
Hashtable hints= new Hashtable();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height,hints);
File outputFile = new File("D:/shuchu.png");
MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);
System.out.println("It is ok!");
}
}