java生成二维码

具体代码如下，作为一个新手，期待与你一起交流：

import java.awt.Color;  
import java.awt.Graphics2D;  
import java.awt.image.BufferedImage;  
import java.io.File;  
  
import javax.imageio.ImageIO;  
  
import com.swetake.util.Qrcode;
public class QRCodeEncoderHandler {
   /**
    * 生成二维码(QRCode)图片
    * @param content
    * @param imgPath
    */
    public void encoderQRCode(String content,String imgPath){
        try{
            Qrcode qrcodeHandler = new Qrcode();  
            qrcodeHandler.setQrcodeErrorCorrect('M');  
            qrcodeHandler.setQrcodeEncodeMode('B');  
            qrcodeHandler.setQrcodeVersion(7);  
  
            System.out.println(content);  
            byte[] contentBytes = content.getBytes("utf-8");  
  
            BufferedImage bufImg = new BufferedImage(140, 140,  
                    BufferedImage.TYPE_INT_RGB);  
  
            Graphics2D gs = bufImg.createGraphics();  
  
            gs.setBackground(Color.WHITE);  
            gs.clearRect(0, 0,30000,30000);  
  
            // 设定图像颜色 > BLACK  
            gs.setColor(new Color(0,0,0,255));  
  
            // 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 ]. ");  
            }  
  
            gs.dispose();  
            bufImg.flush();  
  
            File imgFile = new File(imgPath);  
  
            // 生成二维码QRCode图片  
            ImageIO.write(bufImg, "png", imgFile);   
        }catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace(); 
        }
    }
    public static void main(String[] args) {
        String imgPath = "D://Michael.jpg";  
          
        String content = "姓名：**"  
                + "\n\r电话：135********"  
                + "\n\rEmail:******4@qq.com" + "\n\rEmail2:******@163.com" +"\n\rQQ :******";  
  
        QRCodeEncoderHandler handler = new QRCodeEncoderHandler();  
        handler.encoderQRCode(content, imgPath);  
  
        System.out.println("encoder QRcode success");  
    }
}