Java implementation reads the settings of pdf attribute information

<dependency>
    <groupId></groupId>
    <artifactId>pdfbox</artifactId>
    <version>2.0.24</version>
</dependency>

import ;
import ;
 
import ;
import ;
 
public class ReadPDFProperties {
    public static void main(String[] args) {
        try {
            // Load PDF file            File file = new File("");
            PDDocument document = (file);
 
            // Get PDF document information            PDDocumentInformation info = ();
 
            // Read properties            String title = ();
            String author = ();
            String subject = ();
            String keywords = ();
            String creator = ();
            String producer = ();
            String creationDate = ().toString();
            String modificationDate = ().toString();
            String trapped = ();
 
            // Output attribute information            ("Title: " + title);
            ("Author: " + author);
            ("Subject: " + subject);
            ("Keywords: " + keywords);
            ("Creator: " + creator);
            ("Producer: " + producer);
            ("Creation Date: " + creationDate);
            ("Modification Date: " + modificationDate);
            ("Trapped: " + trapped);
 
            // Close the document            ();
 
        } catch (IOException e) {
            ();
        }
    }
}

import ;
import ;
 
import ;
import ;
 
public class PDFPropertiesExample {
    public static void main(String[] args) {
        try (PDDocument document = (new File(""))) {
            PDDocumentInformation info = ();
            
            // Set document properties            ("Author's Name");
            ("Document Title");
            ("Document Topic");
            
            // More properties can be set, such as:            // ("Keyword 1, Keyword 2");            // ("creator application name");            // ("Producer application name");            
            // Save properties            (info);
            
            // Save the changed document            ("updated_example.pdf");
        } catch (IOException e) {
            ();
        }
    }
}