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");
     }
 }