3 回答

TA貢獻1752條經(jīng)驗 獲得超4個贊
在經(jīng)歷了很多 FOP java 代碼之后,我設(shè)法讓它工作。
描述性版本
主要思想是強制 FOP 使用自定義PDFRendererConfigurator,在執(zhí)行時將返回所需的字體列表getCustomFontCollection()。
為了做到這一點,我們需要創(chuàng)建自定義PDFDocumentHandlerMaker,它將返回自定義PDFDocumentHandler(表單方法makeIFDocumentHandler()),然后返回我們的自定義PDFRendererConfigurator(來自getConfigurator()方法),如上所述,將設(shè)置自定義字體列表。
然后只需添加自定義PDFDocumentHandlerMaker即可RendererFactory。
FopFactory > RendererFactory > PDFDocumentHandlerMaker > PDFDocumentHandler > PDFRendererConfigurator
完整代碼
FopTest.java
public class FopTest {
public static void main(String[] args) throws Exception {
// the XSL FO file
StreamSource xsltFile = new StreamSource(
Thread.currentThread().getContextClassLoader().getResourceAsStream("template.xsl"));
// the XML file which provides the input
StreamSource xmlSource = new StreamSource(
Thread.currentThread().getContextClassLoader().getResourceAsStream("employees.xml"));
// create an instance of fop factory
FopFactory fopFactory = new FopFactoryBuilder(new File(".").toURI()).build();
RendererFactory rendererFactory = fopFactory.getRendererFactory();
rendererFactory.addDocumentHandlerMaker(new CustomPDFDocumentHandlerMaker());
// a user agent is needed for transformation
FOUserAgent foUserAgent = fopFactory.newFOUserAgent();
// Setup output
OutputStream out;
out = new java.io.FileOutputStream("employee.pdf");
try {
// Construct fop with desired output format
Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, out);
// Setup XSLT
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer(xsltFile);
// Resulting SAX events (the generated FO) must be piped through to
// FOP
Result res = new SAXResult(fop.getDefaultHandler());
// Start XSLT transformation and FOP processing
// That's where the XML is first transformed to XSL-FO and then
// PDF is created
transformer.transform(xmlSource, res);
} finally {
out.close();
}
}
}
CustomPDFDocumentHandlerMaker.java
public class CustomPDFDocumentHandlerMaker extends PDFDocumentHandlerMaker {
@Override
public IFDocumentHandler makeIFDocumentHandler(IFContext ifContext) {
CustomPDFDocumentHandler handler = new CustomPDFDocumentHandler(ifContext);
FOUserAgent ua = ifContext.getUserAgent();
if (ua.isAccessibilityEnabled()) {
ua.setStructureTreeEventHandler(handler.getStructureTreeEventHandler());
}
return handler;
}
}
CustomPDFDocumentHandler.java
public class CustomPDFDocumentHandler extends PDFDocumentHandler {
public CustomPDFDocumentHandler(IFContext context) {
super(context);
}
@Override
public IFDocumentHandlerConfigurator getConfigurator() {
return new CustomPDFRendererConfigurator(getUserAgent(), new PDFRendererConfigParser());
}
}
CustomPDFRendererConfigurator.java
public class CustomPDFRendererConfigurator extends PDFRendererConfigurator {
public CustomPDFRendererConfigurator(FOUserAgent userAgent, RendererConfigParser rendererConfigParser) {
super(userAgent, rendererConfigParser);
}
@Override
protected FontCollection getCustomFontCollection(InternalResourceResolver resolver, String mimeType)
throws FOPException {
List<EmbedFontInfo> fontList = new ArrayList<EmbedFontInfo>();
try {
FontUris fontUris = new FontUris(Thread.currentThread().getContextClassLoader().getResource("UbuntuMono-Bold.ttf").toURI(), null);
List<FontTriplet> triplets = new ArrayList<FontTriplet>();
triplets.add(new FontTriplet("UbuntuMono", Font.STYLE_NORMAL, Font.WEIGHT_NORMAL));
EmbedFontInfo fontInfo = new EmbedFontInfo(fontUris, false, false, triplets, null, EncodingMode.AUTO, EmbeddingMode.AUTO);
fontList.add(fontInfo);
} catch (Exception e) {
e.printStackTrace();
}
return createCollectionFromFontList(resolver, fontList);
}
}

TA貢獻1833條經(jīng)驗 獲得超4個贊
是的,你可以這樣做。您需要以編程方式設(shè)置 FOP 的第一個基本目錄。
fopFactory = FopFactory.newInstance();
// for image base URL : images from Resource path of project
String serverPath = request.getSession().getServletContext().getRealPath("/");
fopFactory.setBaseURL(serverPath);
// for fonts base URL : .ttf from Resource path of project
fopFactory.getFontManager().setFontBaseURL(serverPath);
然后使用 FOB 字體配置文件。它將使用上面的基本路徑。
只需將您的字體文件放在 Web 應用程序資源文件夾中,并在 FOP 的字體配置文件中引用該路徑。
評論后:以編程方式讀取字體配置(仍按要求不是首選和干凈的方式)
//This is NON tested and PSEUDO code to get understanding of logic
FontUris fontUris = new FontUris(new URI("<font.ttf relative path>"), null);
EmbedFontInfo fontInfo = new EmbedFontInfo(fontUris, "is kerning enabled boolean", "is aldvaned enabled boolean", null, "subFontName");
List<EmbedFontInfo> fontInfoList = new ArrayList<>();
fontInfoList.add(fontInfo);
//set base URL for Font Manager to use relative path of ttf file.
fopFactory.getFontManager().updateReferencedFonts(fontInfoList);
您可以獲得有關(guān) FOP 相對路徑的更多信息https://xmlgraphics.apache.org/fop/2.2/configuration.html

TA貢獻1812條經(jīng)驗 獲得超5個贊
以下方法可能對那些使用PDFTranscoder.
將以下xml模板放入資源中:
<?xml version="1.0" encoding="UTF-8"?>
<fop version="1.0">
<fonts>
<font kerning="no" embed-url="IBM_PLEX_MONO_PATH" embedding-mode="subset">
<font-triplet name="IBM Plex Mono" style="normal" weight="normal"/>
</font>
</fonts>
</fop>
然后可以加載此 xml 并IBM_PLEX_MONO_PATH在運行時將帶有字體 () 的行替換為資源包中字體的實際 URI:
private val fopConfig = DefaultConfigurationBuilder()
.buildFromFile(javaClass.getResourceAsStream("/fonts/fopconf.xml")?.use {
val xml = BufferedReader(InputStreamReader(it)).use { bf ->
bf.readLines()
.joinToString("")
.replace(
"IBM_PLEX_MONO_PATH",
javaClass.getResource("/fonts/IBM_Plex_Mono/IBMPlexMono-Text.ttf")!!.toURI().toString()
)
}
val file = Files.createTempFile("fopconf", "xml")
file.writeText(xml)
file.toFile()
})
現(xiàn)在可以使用此配置,PDFTranscoder您的自定義字體可能會被渲染并嵌入到 PDF 中:
val pdfTranscoder = if (type == PDF) PDFTranscoder() else EPSTranscoder()
ContainerUtil.configure(pdfTranscoder, fopConfig)
val input = TranscoderInput(ByteArrayInputStream(svg.toByteArray()))
ByteArrayOutputStream().use { byteArrayOutputStream ->
val output = TranscoderOutput(byteArrayOutputStream)
pdfTranscoder.transcode(input, output)
byteArrayOutputStream.toByteArray()
}
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