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java代码将链接转换为二维码

java代码将链接转换为⼆维码

package cn.itcast.action;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import java.io.OutputStream;

SimpleDateFormat;

import java.util.Date;

import java.util.HashMap;

import java.util.Map;

import javax.imageio.ImageIO;

import javax.swing.filechooser.FileSystemView;

le.zxing.BarcodeFormat;

le.zxing.EncodeHintType;

le.zxing.MultiFormatWriter;

le.zxingmon.BitMatrix;

public class QrCodeUtil {

public static void main(String[] args) {

String url = "t/RdZMeZJ111111";

String path = FileSystemView().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 (ists() || ((ParentFile().exists() || ParentFile().mkdirs()) && ateNewFile())) { 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 = Width();

int height = Height();

BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

for (int x = 0; x < width; x++) {

for (int y = 0; y < height; y++) {代码转换

image.setRGB(x, y, (x, y) ? BLACK : WHITE);

}

return image;

}

本⽂是短链接⽣成⼆维码图⽚保存到本地的⼀个实例demo

核⼼包是

core-3.1.0.jar ⾃⼰下载吧

本文发布于:2024-09-20 18:27:22，感谢您对本站的认可！

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