pdf Metadata
In this program we are going to know what is metadata
in pdf.
Metadata is data about something, whether it is
an object, person, or any other data. The term has come to mean structured
information that feeds into automated processes, and this is the most useful way
to think about metadata. Metadata is useful to the people and
systems that keeps it, primarily within the context of a particular system. Metadata
can take many forms, and metadata records can vary tremendously in richness,
creating an array of content management and economic models.
To make a program over this, firstly we need to import
some packages. Remember to make this program the first and foremost thing to
remember is to place the iText.jar in WEB-INF/lib of your web
application. Without this jar our application cannot run. The packages we were talking about are java.io.* for input
output, com.lowagie.text.pdf.*, and com.lowagie.text.*. These two
package will help us to make and use pdf file in our program.
Now create a file named Comboine2page.
Remember the name of the file should be such that the reader can understand what
the program is going to perform. Inside the class declare a main method inside
which we are going to write the logic of our program.
Firstly make a object of Document class. This
class describes a document's page size, margins, and other important attributes.
It works as a container for a document's chapters, sections, images, paragraphs,
and other content.
Now create a document writer that writes the equivalent
syntax for a document's content to a specific OutputStream. PdfWriter.getInstance()
creates a PDF document writer that writes PDF syntax to concerned
file by a FileOutputStream.
Now open the document by document.open(). Add
the method addTitle() to the previously created Document, then also add subject,
keywords, creator, author to the already created Document.
Create a Paragraph
that houses a paragraph of text, tells the PDF document writer to ensure
that the Paragraph's text is justified on both sides and adds the Paragraph
to the previously created Document. Inside the constructor of Paragraph
we have passed one String "Roseindia". At last
closes the document by using the document.close(). The closing of the
document is important because it flushes and closes the OutputStream
instance.
The code of the program is given below:
import java.io.FileOutputStream;
import java.io.IOException;
import com.lowagie.text.*;
import com.lowagie.text.pdf.*;
public class MetaData {
public static void main(String[] args) throws Exception{
System.out.println("Meta data");
Document document = new Document();
PdfWriter.getInstance(document,new FileOutputStream("metaDataPdf.pdf"));
document.addTitle("Meta Data");
document.addSubject("This example explains how to add metadata.");
document.addKeywords("Rose India");
document.addCreator("My program using iText");
document.addAuthor("Rajesh Kumar");
document.open();
document.add(new Paragraph("Rose india"));
document.close();
}
}
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The output of the program is given below:
Download this example.
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