Java生成二维码，基于QRCode

package test;

import java.io.*;

import java.util.Date;

import java.awt.*;

import java.awt.image.*;

import javax.imageio.*;

import com.swetake.util.Qrcode;

public class QRCodeEncoderTest {

  public QRCodeEncoderTest() {

  }

  public static void create_image(String sms_info) throws Exception {

    try {

      Qrcode testQrcode = new Qrcode();

      testQrcode.setQrcodeErrorCorrect('M');

      testQrcode.setQrcodeEncodeMode('B');

      testQrcode.setQrcodeVersion(20);

      String testString = sms_info;

      byte[] d = testString.getBytes("gbk");

      System.out.println(d.length);

      BufferedImage bi = new BufferedImage(98, 98,

      BufferedImage.TYPE_BYTE_BINARY);

      Graphics2D g = bi.createGraphics();

      g.setBackground(Color.WHITE);

      g.clearRect(0, 0, 98, 98);

      g.setColor(Color.BLACK);

      // 限制最大字节数为120

      if (d.length > 0 && d.length < 300) {

        boolean[][] s = testQrcode.calQrcode(d);

        for (int i = 0; i < s.length; i++) {

          for (int j = 0; j < s.length; j++) {

            if (s[j][i]) {

              g.fillRect(j * 2 + 3, i * 2 + 3, 2, 2);

            }

          }

        }

      }

      g.dispose();

      bi.flush();

      File f = new File("D:\\" + sms_info + ".jpg");

      if (!f.exists()) {

        f.createNewFile();

      }

      // 创建图片

      ImageIO.write(bi, "jpg", f);

    } // end try

    catch (Exception e) {

      e.printStackTrace();

    } // end catch

  }

  public static void main(String[] args) throws Exception {

    System.out.println(new Date());

    QRCodeEncoderTest.create_image("QRCode");

    System.out.println(new Date());

  }

}

jar包：