默认情况下,XInclude的支持Java 6中?
题
我看到在我的应用我的解析XML文件中的XInclude我的Java XSLT转换中不起作用。
然而,虽然我做的:
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setXIncludeAware(true);
我不特别设置变压器厂作为System.getProperty("javax.xml.transform.TransformerFactory")
返回“NULL”。
我的问题:是否默认的Java(1.6或6)支撑的XInclude或我必须添加一个替代XSLT解析器如Apache的Xerces
解决方案
根据规范时,支持一直存在自爪哇1.5(5)。我相信XInclude的支持依赖于名称空间感知,该默认情况下关闭了向后兼容的原因。
public class XIncludeDemo {
private static final String XML = "<?xml version=\"1.0\"?>\n"
+ "<data xmlns=\"foo\" xmlns:xi=\"http://www.w3.org/2001/XInclude\">\n"
+ "<xi:include href=\"include.txt\" parse=\"text\"/>\n"
+ "</data>\n";
private static final String INCLUDE = "Hello, World!";
public static void main(String[] args) throws Exception {
// data
final InputStream xmlStream = new ByteArrayInputStream(XML
.getBytes("UTF-8"));
final InputStream includeStream = new ByteArrayInputStream(INCLUDE
.getBytes("UTF-8"));
// document parser
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setXIncludeAware(true);
factory.setNamespaceAware(true);
DocumentBuilder docBuilder = factory.newDocumentBuilder();
if (!docBuilder.isXIncludeAware()) {
throw new IllegalStateException();
}
docBuilder.setEntityResolver(new EntityResolver() {
@Override
public InputSource resolveEntity(String publicId, String systemId)
throws SAXException, IOException {
if (systemId.endsWith("include.txt")) {
return new InputSource(includeStream);
}
return null;
}
});
Document doc = docBuilder.parse(xmlStream);
// print result
Source source = new DOMSource(doc);
Result result = new StreamResult(System.out);
TransformerFactory transformerFactory = TransformerFactory
.newInstance();
Transformer transformer = transformerFactory.newTransformer();
transformer.transform(source, result);
}
}
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