Java制作二维码代码,中间带logo图片,可设置logo大小

发表于 2018-04-17 17:49:43
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案稚忻颇
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package main;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

import com.swetake.util.Qrcode;


public class CreateQRCode {

 public static int createQRCode(String content, String imgPath,String logo) { 
        try { 
            Qrcode qrcodeHandler = new Qrcode(); 
            qrcodeHandler.setQrcodeErrorCorrect('M'); 
            qrcodeHandler.setQrcodeEncodeMode('B'); 
            qrcodeHandler.setQrcodeVersion(7); 
            // System.out.println(content); 
            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, 55, 55, 30, 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){
    createQRCode("http://www.baidu.com",
      "C:/Users/Public/Pictures/Sample Pictures/二维码.png",
      "C:/Users/Public/Pictures/Sample Pictures/logo.png");
   }
  

}




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案稚忻颇 最后编辑 于 2018-04-17 17:49:43
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