Set XMP Metadata of an existing PDF - facades

In order to set XMP metadata in a PDF file, you need to create PdfXmpMetadata object and bind the PDF file using bindPdf(..) method. You can use setByDefaultMetadataProperties(..) method of the PdfXmpMetadata class to add different properties. Finally, call the save(…) method of PdfXmpMetadata class.

The following code snippet shows you how to add XMP metadata in a PDF file.

// For complete examples and data files, please go to https://github.com/aspose-pdf/Aspose.Pdf-for-Java
// create PdfXmpMetadata object
PdfXmpMetadata xmpMetaData = new PdfXmpMetadata();

// bind pdf file to the object
xmpMetaData.bindPdf("input.pdf");

// add create date
xmpMetaData.setByDefaultMetadataProperties(DefaultMetadataProperties.CreateDate, new java.util.Date());

// change meta data date
xmpMetaData.setByDefaultMetadataProperties(DefaultMetadataProperties.MetadataDate, new java.util.Date());

// add creator tool
xmpMetaData.setByDefaultMetadataProperties(DefaultMetadataProperties.CreatorTool, "Creator tool name");

// add Nick for MetaData
xmpMetaData.setByDefaultMetadataProperties(DefaultMetadataProperties.Nickname, "Aspose Nick");

// remove modify date
xmpMetaData.remove(DefaultMetadataProperties.ModifyDate);

// add user defined property
// step #1: register namespace prefix and URI
xmpMetaData.registerNamespaceURI("customNamespace", "http://www.customNameSpaces.com/ns/");
// step #2: add user property with the prefix
xmpMetaData.addItem("customNamespace:UserPropertyName", "UserPropertyValue");

// save xmp meta data in the pdf file
xmpMetaData.save("Updated_MetaData.pdf");

// close the object
xmpMetaData.close();