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Sample table creation in PDF using Servlet

Required Jar:

Download Itext 1.3 jar 

Servlet Code:

import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.io.ByteArrayOutputStream;
import java.io.PrintWriter;
import com.lowagie.text.*;
import com.lowagie.text.pdf.*;

public class PDFServlet extends HttpServlet
{

public PDFServlet()
{
super();
}


public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws javax.servlet.ServletException, java.io.IOException
{
DocumentException ex = null;

ByteArrayOutputStream baosPDF = null;

try
{
baosPDF = generatePDFDocumentBytes(req, this.getServletContext());

StringBuffer sbFilename = new StringBuffer();
sbFilename.append("filename_");
sbFilename.append(System.currentTimeMillis());
sbFilename.append(".pdf");

resp.setHeader("Cache-Control", "max-age=30");

resp.setContentType("application/pdf");

StringBuffer sbContentDispValue = new StringBuffer();
sbContentDispValue.append("inline");
sbContentDispValue.append("; filename=");
sbContentDispValue.append(sbFilename);

resp.setHeader(
"Content-disposition",
sbContentDispValue.toString());

resp.setContentLength(baosPDF.size());

ServletOutputStream sos;

sos = resp.getOutputStream();

baosPDF.writeTo(sos);

sos.flush();
}
catch (DocumentException dex)
{
resp.setContentType("text/html");
PrintWriter writer = resp.getWriter();
writer.println(
this.getClass().getName()
+ " caught an exception: "
+ dex.getClass().getName()
+ "<br>");
writer.println("<pre>");
dex.printStackTrace(writer);
writer.println("</pre>");
}
finally
{
if (baosPDF != null)
{
baosPDF.reset();
}
}

 }
protected ByteArrayOutputStream generatePDFDocumentBytes(
final HttpServletRequest req,
final ServletContext ctx)
throws DocumentException

{
Document doc = new Document();

ByteArrayOutputStream baosPDF = new ByteArrayOutputStream();
PdfWriter docWriter = null;

try
{
docWriter = PdfWriter.getInstance(doc, baosPDF);

doc.addAuthor(this.getClass().getName());
doc.addCreationDate();
doc.addProducer();
doc.addCreator(this.getClass().getName());
doc.addTitle("This is a title.");
doc.addKeywords("pdf, itext, Java, open source, http");
doc.setPageSize(PageSize.LETTER);

HeaderFooter footer = new HeaderFooter(
new Phrase("Created by Ganesh Rengarajan."),
false);

doc.setFooter(footer);
doc.open();
doc.add(new Paragraph(
  "Sample table in PDF using Web Application(Servlet)"));
doc.add( makeGeneralRequestDetailsElement(req) );
}
catch (DocumentException dex)
{
baosPDF.reset();
throw dex;
}
finally
{
if (doc != null)
{
doc.close();
}
if (docWriter != null)
{
docWriter.close();
}
}

if (baosPDF.size() < 1)
{
throw new DocumentException(
"document has "
+ baosPDF.size()
+ " bytes");
}
return baosPDF;
}

protected Element makeGeneralRequestDetailsElement(
final HttpServletRequest req)

{

ArrayList l=new ArrayList();
l.add("Name");
l.add("ganesh");
l.add("Age");
l.add("23");
l.add("Gender");
l.add("Male");
l.add("Date");
l.add("23/02/12");
l.add("Seat No");
l.add("07");
l.add("From");
l.add("Mayiladuthurai");
l.add("To");
l.add("Chennai");
l.add("Ticket Fare");
l.add("240");

Table tab = null;

tab = makeTableFromMap(l);

return (Element) tab;
}

private static Table makeTableFromMap(

final java.util.ArrayList m)
{
Table tab = null;

try
{
tab = new Table(2 /* columns */);
}
catch (BadElementException ex)
{
throw new RuntimeException(ex);
}

tab.setBorderWidth(1.0f);
tab.setPadding(5);
tab.setSpacing(5);
tab.endHeaders();

if (m.size() == 0)
{
Cell c = new Cell("none");
c.setColspan(tab.columns());
tab.addCell(c);
}
else
{

Iterator i = m.iterator();
String strName=null;
while (i.hasNext())
{
strName=i.next().toString();
tab.addCell(new Cell(strName));
}

}

return tab;
}

}

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