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本文介紹了在矢量圖像中創(chuàng)建二維碼的處理方法，對(duì)大家解決問(wèn)題具有一定的參考價(jià)值，需要的朋友們下面隨著小編來(lái)一起學(xué)習(xí)吧！

問(wèn)題描述

我可以用ZXing成功創(chuàng)建二維碼PNG圖像，但沒(méi)有簡(jiǎn)單的方法可以獲得SVG或EPS格式的輸出。

如何從QRCodeWriter創(chuàng)建的BitMatrix對(duì)象創(chuàng)建矢量圖像？

pdf

我發(fā)現(xiàn)最簡(jiǎn)單的方法是用iText創(chuàng)建推薦答案，然后將生成的pdf轉(zhuǎn)換為eps或svg。以下是創(chuàng)建PDF的代碼：

   @Test
   public void testQRtoPDF() throws WriterException, FileNotFoundException, DocumentException, UnsupportedEncodingException {
      final int s = 600;
      int r = 1;

      Charset charset = Charset.forName( "UTF-8" );
      CharsetEncoder encoder = charset.newEncoder();
      byte[] b = null;
      try {
         // Convert a string to UTF-8 bytes in a ByteBuffer
         ByteBuffer bbuf = encoder.encode( CharBuffer.wrap(
                     "1é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò1" +
                                 "2é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò2" +
                                 "3é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò3" +
                                 "4é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò4" +
                                 "5é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò5" +
                                 "6é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò??é?à?èüùò6" ) );
         b = bbuf.array();
      } catch ( CharacterCodingException e ) {
         System.out.println( e.getMessage() );
      }

      String content = new String( b, "UTF-8" );
      QRCodeWriter qrCodeWriter = new QRCodeWriter();
      Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>( 2 );
      hints.put( EncodeHintType.CHARACTER_SET, "UTF-8" );
      BitMatrix qrCode = qrCodeWriter.encode( content, BarcodeFormat.QR_CODE, s, s, hints );

      Document doc = new Document( new Rectangle( s, s ) );
      PdfWriter pdfWriter = PdfWriter.getInstance( doc, new FileOutputStream( "qr-code.pdf" ) );
      doc.open();
      PdfContentByte contentByte = pdfWriter.getDirectContent();
      contentByte.setColorFill( BaseColor.BLACK );

      boolean d = false;
      for ( int x = 0; x < qrCode.getWidth(); x += r ) {
         for ( int y = 0; y < qrCode.getHeight(); y += r ) {
            if ( qrCode.get( x, y ) ) {
               contentByte.rectangle( x, s - y, r, r );
               contentByte.fill();
               contentByte.stroke();
            }
         }
      }

      doc.close();
   }

然后我使用圖像魔術(shù)進(jìn)行轉(zhuǎn)換。如下所示：

convert qr-code.pdf qr-code.eps

不能對(duì)SVG執(zhí)行同樣的操作

convert qr-code.pdf qr-code.svg

這不起作用

我用一些長(zhǎng)內(nèi)容測(cè)試了這段代碼，它可以處理多達(dá)600個(gè)字符。這可能取決于手機(jī)或屏幕上攝像頭的精確度。

我希望這能幫助某人

這篇關(guān)于在矢量圖像中創(chuàng)建二維碼的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，