Hvordan sender man et XML-dokument til XSL-fil ved hjælp af Javax.xml.transformer API?
Jeg tror, dit problem er i XSLT. Skift
<xsl:variable name="lookup" select="('documentFile')/> .
til
<xsl:variable name="lookup" select="document('lookup')/>
dette vil få transformeren til at lave DOM
af dit dokument tilgængeligt i variablen lookup
. Nøglen lookup
kommer fra docs.put("lookup", documentFile);
Send dynamisk flere XML-kilder til XSL-transformation via URIResolver.
Fuldstændig arbejdseksempel:
Vær der tre XML-filer:repo.xml
, books.xml
og articles.xml
. repo.xml
indeholder statusoplysninger om bøger og artikler. Filerne articles.xml
og books.xml
indeholde titeloplysninger om hver vare. Målet er at udskrive statusoplysninger for alle bøger og artikler sammen med titeloplysningerne. Indtastningerne i alle filer er forbundet via id
nøgler.
Find et komplet eksempel på github eller kopier/indsæt listen nedenfor.
repo.xml
<repository>
<book>
<id>1</id>
<status>available</status>
</book>
<book>
<id>2</id>
<status>lost</status>
</book>
<article>
<id>1</id>
<status>in transit</status>
</article>
</repository>
books.xml
<books>
<book id="1">
<title>Book One</title>
</book>
<book id="2">
<title>Book Two</title>
</book>
<book id="3">
<title>Book Three</title>
</book>
</books>
articles.xml
<articles>
<article id="1">
<title>Article One</title>
</article>
<article id="2">
<title>Article Two</title>
</article>
<article id="3">
<title>Article Three</title>
</article>
</articles>
join.xsl
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" encoding="UTF-8" indent="yes" />
<xsl:template match="/">
<titleStatusJoin>
<xsl:for-each select="//book">
<xsl:variable name="myId" select="id" />
<book>
<status>
<xsl:value-of select="status" />
</status>
<title>
<xsl:for-each select="document('bookFile')//book">
<xsl:variable name="bookId" select="@id" />
<xsl:choose>
<xsl:when test="$myId = $bookId">
<xsl:value-of select="title" />
</xsl:when>
</xsl:choose>
</xsl:for-each>
</title>
</book>
</xsl:for-each>
<xsl:for-each select="//article">
<xsl:variable name="myId" select="id" />
<article>
<status>
<xsl:value-of select="status" />
</status>
<title>
<xsl:for-each select="document('articleFile')//article">
<xsl:variable name="bookId" select="@id" />
<xsl:choose>
<xsl:when test="$myId = $bookId">
<xsl:value-of select="title" />
</xsl:when>
</xsl:choose>
</xsl:for-each>
</title>
</article>
</xsl:for-each>
</titleStatusJoin>
</xsl:template>
</xsl:stylesheet>
Brug denne Java-kode...
@Test
public void useMultipleXmlSourcesInOneXsl3() {
InputStream xml = Thread.currentThread().getContextClassLoader().getResourceAsStream("stack54335576/repo.xml");
InputStream xsl = Thread.currentThread().getContextClassLoader().getResourceAsStream("stack54335576/join3.xsl");
InputStream booksXml = Thread.currentThread().getContextClassLoader()
.getResourceAsStream("stack54335576/books.xml");
InputStream articlesXml = Thread.currentThread().getContextClassLoader()
.getResourceAsStream("stack54335576/articles.xml");
Document booksDom = readXml(booksXml);
Document articlesDom = readXml(articlesXml);
Map<String, Document> parameters = new HashMap<>();
parameters.put("bookFile", booksDom);
parameters.put("articleFile", articlesDom);
xslt(xml, xsl, parameters);
}
public final void xslt(InputStream xml, InputStream xsl, Map<String, Document> parameters) {
try {
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer(new StreamSource(xsl));
transformer.setURIResolver((href, base) -> new DOMSource(parameters.get(href)));
transformer.transform(new StreamSource(xml), new StreamResult(System.out));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private Document readXml(InputStream xmlin) {
try {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
DocumentBuilder db = dbf.newDocumentBuilder();
return db.parse(xmlin);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
...for at producere dette output
<?xml version="1.0" encoding="UTF-8"?>
<titleStatusJoin>
<book>
<status>available</status>
<title>Book One</title>
</book>
<book>
<status>lost</status>
<title>Book Two</title>
</book>
<article>
<status>in transit</status>
<title>Article One</title>
</article>
</titleStatusJoin>