Java
Chilkat2 Java
Extract Metadata XML from PDF
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Demonstrates how to extract the metadata XML from a PDF.Chilkat Java Downloads
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Pdf;
import com.chilkatsoft.chilkat2.StringBuilder;
import com.chilkatsoft.chilkat2.Xml;
public class ChilkatExample {
public static void main(String[] args) {
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
Pdf pdf = new Pdf();
try {
pdf.loadFile("qa_data/pdf/blank_with_metadata.pdf");
} catch (ChilkatException e) {
System.out.println(e.getLastErrorText());
return;
}
StringBuilder sbXml = new StringBuilder();
// Note: Not all PDF files have metadata. Metadata is optional.
try {
pdf.getMetadata(sbXml);
} catch (ChilkatException e) {
System.out.println(e.getLastErrorText());
return;
}
Xml xml = new Xml();
xml.loadSb(sbXml, true);
System.out.println(xml.getXml());
// Sample PDF metadata XML:
// (Code for parsing follows)
// Use this online tool to generate parsing code from sample XML:
// Generate Parsing Code from XML
// <?xml version="1.0" encoding="utf-8"?>
// <x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 9.1-c001 79.675d0f7, 2023/06/11-19:21:16 ">
// <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
// <rdf:Description rdf:about="" xmlns:xmp="http://ns.adobe.com/xap/1.0/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/" xmlns:pdf="http://ns.adobe.com/pdf/1.3/" xmlns:xmpRights="http://ns.adobe.com/xap/1.0/rights/">
// <xmp:ModifyDate>2024-11-27T11:33:12-06:00</xmp:ModifyDate>
// <xmp:CreateDate>2024-11-27T11:28:23-06:00</xmp:CreateDate>
// <xmp:MetadataDate>2024-11-27T11:33:12-06:00</xmp:MetadataDate>
// <xmp:CreatorTool>Adobe Acrobat Pro (32-bit) 24.3.20112</xmp:CreatorTool>
// <dc:format>application/pdf</dc:format>
// <dc:title>
// <rdf:Alt>
// <rdf:li xml:lang="x-default">Blank</rdf:li>
// </rdf:Alt>
// </dc:title>
// <dc:creator>
// <rdf:Bag>
// <rdf:li>Chilkat Software</rdf:li>
// </rdf:Bag>
// </dc:creator>
// <dc:description>
// <rdf:Alt>
// <rdf:li xml:lang="x-default">Blank Document</rdf:li>
// </rdf:Alt>
// </dc:description>
// <dc:subject>
// <rdf:Bag>
// <rdf:li>blank</rdf:li>
// <rdf:li>metadata</rdf:li>
// <rdf:li>document</rdf:li>
// </rdf:Bag>
// </dc:subject>
// <xmpMM:DocumentID>uuid:34535ffa-b632-43f1-b1fd-80cea6fdc351</xmpMM:DocumentID>
// <xmpMM:InstanceID>uuid:69ace620-4c54-407f-8d45-6eebc90f34c2</xmpMM:InstanceID>
// <pdf:Producer>Adobe Acrobat Pro (32-bit) 24.3.20112</pdf:Producer>
// <pdf:Keywords>blank; metadata; document</pdf:Keywords>
// <xmpRights:WebStatement>https://www.chilkatsoft.com/</xmpRights:WebStatement>
// </rdf:Description>
// </rdf:RDF>
// </x:xmpmeta>
String x_xmpmeta_xmlns_x = xml.getAttrValue("xmlns:x");
String x_xmpmeta_x_xmptk = xml.getAttrValue("x:xmptk");
String rdf_RDF_xmlns_rdf = xml.chilkatPath("rdf:RDF|(xmlns:rdf)");
String rdf_Description_rdf_about = xml.chilkatPath("rdf:RDF|rdf:Description|(rdf:about)");
String rdf_Description_xmlns_xmp = xml.chilkatPath("rdf:RDF|rdf:Description|(xmlns:xmp)");
String rdf_Description_xmlns_dc = xml.chilkatPath("rdf:RDF|rdf:Description|(xmlns:dc)");
String rdf_Description_xmlns_xmpMM = xml.chilkatPath("rdf:RDF|rdf:Description|(xmlns:xmpMM)");
String rdf_Description_xmlns_pdf = xml.chilkatPath("rdf:RDF|rdf:Description|(xmlns:pdf)");
String rdf_Description_xmlns_xmpRights = xml.chilkatPath("rdf:RDF|rdf:Description|(xmlns:xmpRights)");
String xmp_ModifyDate = xml.getChildContent("rdf:RDF|rdf:Description|xmp:ModifyDate");
String xmp_CreateDate = xml.getChildContent("rdf:RDF|rdf:Description|xmp:CreateDate");
String xmp_MetadataDate = xml.getChildContent("rdf:RDF|rdf:Description|xmp:MetadataDate");
String xmp_CreatorTool = xml.getChildContent("rdf:RDF|rdf:Description|xmp:CreatorTool");
String dc_format = xml.getChildContent("rdf:RDF|rdf:Description|dc:format");
String rdf_li_xml_lang = xml.chilkatPath("rdf:RDF|rdf:Description|dc:title|rdf:Alt|rdf:li|(xml:lang)");
String rdf_li = xml.getChildContent("rdf:RDF|rdf:Description|dc:title|rdf:Alt|rdf:li");
rdf_li = xml.getChildContent("rdf:RDF|rdf:Description|dc:creator|rdf:Bag|rdf:li");
rdf_li_xml_lang = xml.chilkatPath("rdf:RDF|rdf:Description|dc:description|rdf:Alt|rdf:li|(xml:lang)");
rdf_li = xml.getChildContent("rdf:RDF|rdf:Description|dc:description|rdf:Alt|rdf:li");
int i = 0;
int count_i = xml.numChildrenHavingTag("rdf:RDF|rdf:Description|dc:subject|rdf:Bag|rdf:li");
while (i < count_i) {
xml.setI(i);
rdf_li = xml.getChildContent("rdf:RDF|rdf:Description|dc:subject|rdf:Bag|rdf:li[i]");
i = i + 1;
}
String xmpMM_DocumentID = xml.getChildContent("rdf:RDF|rdf:Description|xmpMM:DocumentID");
String xmpMM_InstanceID = xml.getChildContent("rdf:RDF|rdf:Description|xmpMM:InstanceID");
String pdf_Producer = xml.getChildContent("rdf:RDF|rdf:Description|pdf:Producer");
String pdf_Keywords = xml.getChildContent("rdf:RDF|rdf:Description|pdf:Keywords");
String xmpRights_WebStatement = xml.getChildContent("rdf:RDF|rdf:Description|xmpRights:WebStatement");
}
}