我正在为我的一个表演项目做POC。目前我正面临 OutOfMemoryError 。首先，我们使用DOM加载了一个XML文件，然后尝试使用XSL将其转换为PDF。在阅读了本论坛的一条评论之后，我切换到SAX解析器，但它仍然会出现同样的错误。
文件为30MB，系统内存为512MB。
System.out.println("FOP XMLTOPDFConverter\n");
System.out.println("Preparing...");
// Setup directories
/* File baseDir = new File(".");
File outDir = new File(baseDir, "out");
outDir.mkdirs();*/
// Setup input and output files
File xmlfile = new File("C:/Documents and Settings/agarwgau/Desktop/300k/File_0000036357.XML");
File xsltfile = new File("C:/Documents and Settings/agarwgau/Desktop/300k/UCB110037EventList.xsl");
File pdffile = new File("C:/Documents and Settings/agarwgau/Desktop/300k/ResultXML2PDF.pdf");
System.out.println("Input: XML (" + xmlfile + ")");
System.out.println("Stylesheet: " + xsltfile);
System.out.println("Output: PDF (" + pdffile + ")");
System.out.println();
System.out.println("Transforming...");
// configure fopFactory as desired
FopFactory fopFactory = FopFactory.newInstance();
FOUserAgent foUserAgent = fopFactory.newFOUserAgent();
// configure foUserAgent as desired
// Setup output
OutputStream out = new java.io.FileOutputStream(pdffile);
out = new java.io.BufferedOutputStream(out);
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(new StreamSource(xsltfile));
// Set the value of a <param> in the stylesheet
transformer.setParameter("versionParam", "2.0");
// Setup input for XSLT transformation
Source src = new StreamSource(xmlfile);
// Resulting SAX events (the generated FO) must be piped through
// to FOP
Result res = new SAXResult(fop.getDefaultHandler());
// Start XSLT transformation and FOP processing
transformer.transform(src, res);
} finally {
out.close();
}
System.out.println("Success!");
} catch (Exception e) {
e.printStackTrace();
System.exit(-1);
}
}