Java自動生成帶log的二維碼
阿新 • • 發佈:2018-12-02
我用的是google.zxing的這個外掛來完成生成二維碼的,還是很方便的。
我們需要引入google.zxing的jar包。 地址為:1. https://mvnrepository.com/artifact/com.google.zxing/core
2. https://mvnrepository.com/artifact/com.google.zxing/javase
程式碼如下:
package asd; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.File; import java.util.HashMap; import java.util.Map; import java.util.Objects; import javax.imageio.ImageIO; //import org.apache.commons.lang3.StringUtils; 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; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; /** * 畫制定logo和制定描述的二維碼 * * @author songyz * */ public class ZXingCode { private static final int QRCOLOR = 0xFF000000; // 預設是黑色 private static final int BGWHITE = 0xFFFFFFFF; // 背景顏色 private static final int WIDTH = 400; // 二維碼寬 private static final int HEIGHT = 400; // 二維碼高 // 用於設定QR二維碼引數 private static Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>() { private static final long serialVersionUID = 1L; { put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);// 設定QR二維碼的糾錯級別(H為最高級別)具體級別資訊 put(EncodeHintType.CHARACTER_SET, "utf-8");// 設定編碼方式 } }; // 生成帶logo的二維碼圖片 public static void drawLogoQRCode(File logoFile, File codeFile, String qrUrl) { try { MultiFormatWriter multiFormatWriter = new MultiFormatWriter(); // 引數順序分別為:編碼內容,編碼型別,生成圖片寬度,生成圖片高度,設定引數 BitMatrix bm = multiFormatWriter.encode(qrUrl, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints); BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB); // 開始利用二維碼資料建立Bitmap圖片,分別設為黑(0xFFFFFFFF)白(0xFF000000)兩色 for (int x = 0; x < WIDTH; x++) { for (int y = 0; y < HEIGHT; y++) { image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE); } } int width = image.getWidth(); int height = image.getHeight(); if (Objects.nonNull(logoFile) && logoFile.exists()) { // 構建繪圖物件 Graphics2D g = image.createGraphics(); // 讀取Logo圖片 BufferedImage logo = ImageIO.read(logoFile); // 開始繪製logo圖片 g.drawImage(logo, width * 2 / 5, height * 2 / 5, width * 2 / 10, height * 2 / 10, null); g.dispose(); logo.flush(); } image.flush(); ImageIO.write(image, "png", codeFile); // TODO } catch (Exception e) { e.printStackTrace(); } } public static void main(String[] args) throws WriterException { File logoFile = new File("E://erweima/QQ.jpg"); //logo File QrCodeFile = new File("E://erweima/"+ UUID.randomUUID()+".png"); //二維碼生成地址以及名稱格式 String url = "https://www.baidu.com/?tn=96228755_hao_pg"; // 掃描二維碼進入網址 ZXingCode.drawLogoQRCode(logoFile, QrCodeFile, url); } }
效果展示:
參考連結:https://blog.csdn.net/qq_22860341/article/details/80222591