二维码生成工具类

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

import javax.imageio.ImageIO;

import com.swetake.util.Qrcode;


public class TwoDimensionCode {
	public void encoderQRCode(String content, String imgPath, String imgType) {  
        this.encoderQRCode(content, imgPath, imgType, 7);  
    }  
  
    public void encoderQRCode(String content, String imgPath, String imgType,  
            int size) {  
        try {  
            BufferedImage bufImg = this.qRCodeCommon(content, imgType, size);  
  
            File imgFile = new File(imgPath);  
            ImageIO.write(bufImg, imgType, imgFile);  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
  
    public void encoderQRCode(String content, OutputStream output,  
            String imgType, int size) {  
        try {  
            BufferedImage bufImg = this.qRCodeCommon(content, imgType, size);  
            ImageIO.write(bufImg, imgType, output);  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
  
    private BufferedImage qRCodeCommon(String content, String imgType, int size) {  
        BufferedImage bufImg = null;  
        try {  
            Qrcode qrcodeHandler = new Qrcode();  
            qrcodeHandler.setQrcodeErrorCorrect('M');  
            qrcodeHandler.setQrcodeEncodeMode('B');  
            qrcodeHandler.setQrcodeVersion(size);  
            byte[] contentBytes = content.getBytes("utf-8");  
            int imgSize = 67 + 12 * (size - 1);  
            bufImg = new BufferedImage(imgSize, imgSize,  
                    BufferedImage.TYPE_INT_RGB);  
            Graphics2D gs = bufImg.createGraphics();  
            gs.setBackground(Color.WHITE);  
            gs.clearRect(0, 0, imgSize, imgSize);  
            gs.setColor(Color.BLACK);  
            int pixoff = 2;  
  
            if (contentBytes.length > 0 && contentBytes.length < 800) {  
                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 {  
                throw new Exception("QRCode content bytes length = "  
                        + contentBytes.length + " not in [0, 800].");  
            }  
            gs.dispose();  
            bufImg.flush();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return bufImg;  
    }  
  
    public static void main(String[] args) {  
        String imgPath = "D:/abing.png";  
        String encoderContent = "本地生活技术部-开发一组-阿丙  [e-mail]  新浪微博http://weibo.com/bingyingao";  
        TwoDimensionCode handler = new TwoDimensionCode();  
        handler.encoderQRCode(encoderContent, imgPath, "png");  
  
    }  
}

所需jar包见附件

评论

1 楼 夜的假名诗 2014-04-18  

imgSize 是怎么计算的？