UTF - 8是一個可變長度的Unicode字符編碼。它可以代表Unicode標準中的任何字符。您可以生成阿拉伯文，拉丁文，希臘文等非英文字符的條碼。本文主要介紹使用Aspose.BarCode來生成和識別UTF-8 (Unicode) 字符的條碼。

通過下面示例的代碼可生成一個阿拉伯字符的條碼，然后從圖像中識別它。

[Java]

import com.aspose.barcode.*;

import com.aspose.barcoderecognition.BarCodeReadType;

import com.aspose.barcoderecognition.BarCodeReader;

import java.awt.Toolkit;

import java.io.UnsupportedEncodingException;

public class RecognitionUnicode {

public static void main(String[] args) throws

UnsupportedEncodingException {

try

{

License lic = new License();

lic.setLicense("e:\\ aspose.barcode.lic");

}

catch(Exception ex)

{

System.out.println(ex.getMessage());

}

String file = "pdf417_un.png";

String scodeText = "????";

System.out.println("codetext: " + scodeText);

String codeText = getCodeTextFromUnicode(scodeText);

BarCodeBuilder builder = new BarCodeBuilder(Symbology.PDF417, codeText);

builder.save(file);

BarCodeReader r = new BarCodeReader
(Toolkit.getDefaultToolkit().getImage(file),BarCodeReadType.Pdf417);

boolean rb = r.read();

String rc = r.getCodeText();

try {

String s = getUnicodeFromCodeText(rc);

System.out.println(s);

} catch (UnsupportedEncodingException e) {

e.printStackTrace();

}

}

private static String getCodeTextFromUnicode(String s)
throws UnsupportedEncodingException {

byte[] bs = s.getBytes("UTF-8");

StringBuffer buf = new StringBuffer();

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

byte b = bs[i];

if(b >=0)

{

buf.append((char)b);

}

else

{

buf.append((char)(127 - b));

}

}

return buf.toString();

}

private static String getUnicodeFromCodeText(String cs)
throws UnsupportedEncodingException {

byte[] bs = new byte[cs.length()];

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

{

char c = cs.charAt(i);

if(c < 128)

{

bs[i] = (byte) c;

}

else

{

bs[i] = (byte) (127 - c);

}

}

return new String(bs," UTF-8");

}

}

下載《Aspose.BarCode》