java qrcode 生成二维码 jar包下载

package test; import java.awt.Color; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.io.UnsupportedEncodingException; import javax.imageio.ImageIO; import com.swetake.util.Qrcode; public class QrcodeTest { /** * @param args * @throws Exception */ public static void main(String[] args) throws Exception { String url = "www.baidu.com?pid=520"; String path = "d://qrcode.jpg"; genQrcode(url, path); System.out.println("二维码生成完毕"); } /** * 生成二维码 * @param url 二维码的url文本内容 * @param path 要存放二维码的路径 * @throws IOException */ public static void genQrcode(String url,String path) throws IOException{ Qrcode x=new Qrcode(); x.setQrcodeErrorCorrect('M');//纠错等级（四种等级） x.setQrcodeEncodeMode('B');//N代表数字，A代表a-Z,B代表其他字符 x.setQrcodeVersion(7);//版本 int width = 67 + 12 * (7 - 1);//设置二维码的大小公式：67 + 12 * （version - 1） int height = 67 + 12 * (7 - 1); BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D gs = bufferedImage.createGraphics(); gs.setBackground(Color.WHITE); gs.setColor(Color.BLACK); gs.clearRect(0, 0, width, height);//清除画板的内容 int pixoff = 2;//添加一个偏移量 byte[] d = url.getBytes("utf-8"); if (d.length>0 && d.length <120){ boolean[][] s = x.calQrcode(d); for (int i=0;i<s.length;i++){ for (int j=0;j<s.length;j++){ if (s[j][i]) { gs.fillRect(j*3 + pixoff,i*3 + pixoff,3,3); } } } } gs.dispose(); bufferedImage.flush(); ImageIO.write(bufferedImage, "png", new File(path)); } }