QrcodeWithLogo

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);

    }

}

Qrcode.jar