import java.io.ByteArrayOutputStream;
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.itextpdf.text.Document;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfWriter;

/**
 * Servlet implementation class PdfServlet
 */
public class PdfServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
 
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// Custom size Rectangle pageSize = new Rectangle(200f, 200f);
		Document document = new Document(PageSize.A4);
		
		
		ByteArrayOutputStream out = new ByteArrayOutputStream(32000);
		try {
			PdfWriter.getInstance(document,out);
			document.open();
			document.add(new Paragraph("Hello World"));
			
		} catch (Exception e) {
		// handle exception
		}
		document.close();
		byte rawDocument[] = out.toByteArray();
		
		response.setContentType("application/pdf");
		
		response.setHeader("Cache-Control", "no-cache");
		response.setDateHeader("Expires", 0);
		
		response.setContentLength(rawDocument.length);
		response.getOutputStream().write( rawDocument );
	}

}