java生成二维码

java生成二维码：

package com.test;

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;

/**
 * 二维码生成器
 * @blog http://sjsky.iteye.com
 * @author Michael
 */
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("gb2312");

			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 ]. ");
			}
			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) {
			e.printStackTrace();
		}

	}

	/**
	 * @param args the command line arguments
	 */
	public static void main(String[] args) {
		String imgPath = "D://test//binaryCode.png";

		String content = "Welcome to http://yangjianzhou.iteye.com ";

		QRCodeEncoderHandler handler = new QRCodeEncoderHandler();
		handler.encoderQRCode(content, imgPath);

		System.out.println("encoder QRcode success");
	}
}

运行结果：