package com.qrcode; import java.awt.Color; import java.awt.Graphics2D; import java.awt.Image; import java.awt.image.BufferedImage; import java.io.File; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; import javax.imageio.ImageIO; import com.swetake.util.Qrcode; public class QrcodeWithLogo { private static final String DATE_FORMAT = "yyyyMMddHH24mmssS"; private static ThreadLocal<DateFormat> threadLocal = new ThreadLocal<DateFormat>() { protected synchronized DateFormat initialValue() { return new SimpleDateFormat(DATE_FORMAT); } }; public static String getTimeStamp() { return threadLocal.get().format(new Date()); } public static int createQRCode(String content, String imgPath, String logo) { try { Qrcode qrcodeHandler = new Qrcode(); qrcodeHandler.setQrcodeErrorCorrect(‘M‘); qrcodeHandler.setQrcodeEncodeMode(‘B‘); qrcodeHandler.setQrcodeVersion(7); byte[] contentBytes = content.getBytes("gb2312"); // 构造一个BufferedImage对象 设置宽、高 BufferedImage bufImg = new BufferedImage(140, 140, BufferedImage.TYPE_INT_RGB); Graphics2D gs = bufImg.createGraphics(); gs.setBackground(Color.WHITE); gs.clearRect(0, 0, 140, 140); // 设定图像颜色 > BLACK gs.setColor(Color.BLACK); // 设置偏移量 不设置可能导致解析出错 int pixoff = 2; // 输出内容 > 二维码 if (contentBytes.length > 0 && contentBytes.length < 120) { boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes); for (int i = 0; i < codeOut.length; i++) { for (int j = 0; j < codeOut.length; j++) { if (codeOut[j][i]) { gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3); } } } } else { System.err.println("QRCode content bytes length = " + contentBytes.length + " not in [ 0,120 ]. "); return -1; } Image img = ImageIO.read(new File(logo));// 实例化一个Image对象。 gs.drawImage(img, 44, 55, 49, 30, null); gs.dispose(); bufImg.flush(); // 生成二维码QRCode图片 File imgFile = new File(imgPath); ImageIO.write(bufImg, "png", imgFile); } catch (Exception e) { e.printStackTrace(); return -100; } return 0; } public static void main(String[] args) { String content = "www.cnblogs.com/softidea"; String imgPath = "qr" + getTimeStamp() + ".jpg"; String logo = "logo.png"; createQRCode(content, imgPath, logo); } }
时间: 2024-10-11 01:36:07