我需要从HTML源代码创建一个PDF文件。目前，我遇到了一个有关输出文件中特殊（波兰）字符的问题，准确来说是它们缺失的问题。
HTML源代码：
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<table width="100%" border="0.5" align="center" cellpadding="0" style="border-collapse:collapse; border:1px solid black; font-family:Arial, Helvetica, sans-serif; font-size:16px">
<tr>
<td align="center" ><b>Test: ąęłóćńśŁÓŃĆŻŹąśżźłęó</b></td>
</tr>
</table>
Java源代码：
Document document = new Document(PageSize.A4, 38, 38, 50, 38);
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("iTextExample.pdf"));
document.open();
HTMLWorker htmlWorker = new HTMLWorker(document);
htmlWorker.parse(new StringReader(readFileAsString("index.html")));
document.close();
public static String readFileAsString(String filePath) throws IOException {
DataInputStream dis = new DataInputStream(new FileInputStream(filePath));
try {
long len = new File(filePath).length();
if (len > Integer.MAX_VALUE) {
throw new IOException("File " + filePath + " too large, was " + len + " bytes.");
}
byte[] bytes = new byte[(int) len];
dis.readFully(bytes);
return new String(bytes, "UTF-8");
} finally {
dis.close();
}
}
我的问题是：如何将整个PDF文件的默认字体（Helvetica）更改为例如Arial Bold？
我尝试了许多与StyleSheet相关的示例，但它们都没有起作用。我必须更改默认字体，因为没有波兰字符 - 这就是我希望能够解决的方法。
编辑：
class defaultFontProvider extends FontFactoryImp {
private String _default;
public defaultFontProvider(String def) {
_default = def;
}
public Font getFont(String fontName, String encoding, boolean embedded, float size, int style, BaseColor color, boolean cached) {
if (fontName == null || size == 0) {
fontName = _default;
}
return super.getFont(fontName, encoding, embedded, size, style, color, cached);
}
}
上述代码嵌入了arial.ttf，这没问题，但我如何将其设置为整个文档的默认字体（而不是Helvetica）。
然后...
Map<String,Object> providers = new HashMap<String, Object>();
defaultFontProvider dfp = new defaultFontProvider("arial.ttf");
providers.put(HTMLWorker.FONT_PROVIDER, dfp);
HTMLWorker htmlWorker = new HTMLWorker(document);
htmlWorker.setProviders(providers);
PDF/A-2文档时做到这一点？ - S_S