Java產生二維碼，基於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);// 限制最大位元組數為120if (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();}// 建立圖片ImageIO.write(bi, "jpg", f);} // end trycatch (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());}}

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