ez-vcard supports versions 2.1, 3.0, and 4.0 of the vCard standard, as well as XML-encoded vCards ("xCard" standard), HTML-encoded vCards ("hCard" microformat), and JSON-encoded vCards ("jCard" standard).
https://github.com/mangstadt/ez-vcard
To read a vCard file, use the Ezvcard.parse() method. Then, call the various getter methods on the returned VCard object to retrieve the vCard data fields.
File file = new File("my-vcard.vcf");
VCard vcard = Ezvcard.parse(file).first();
System.out.println("Name: " + vcard.getFormattedName().getValue());
System.out.println("Email: " + vcard.getEmails().get(0).getValue());
