Java Tutorial/PDF/Servlet

Pdf and servlet

   <source lang="java">

import java.io.IOException; import java.util.Date; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.lowagie.text.Document; import com.lowagie.text.DocumentException; import com.lowagie.text.Paragraph; import com.lowagie.text.html.HtmlWriter; import com.lowagie.text.pdf.PdfWriter; import com.lowagie.text.rtf.RtfWriter2;

public class HelloWorldServlet extends HttpServlet {

 public void doGet(HttpServletRequest request, HttpServletResponse response)
     throws IOException, ServletException {
   String presentationtype = request.getParameter("presentationtype");
   Document document = new Document();
   try {
     if ("pdf".equals(presentationtype)) {
       response.setContentType("application/pdf");
       PdfWriter.getInstance(document, response.getOutputStream());
     } else if ("html".equals(presentationtype)) {
       response.setContentType("text/html");
       HtmlWriter.getInstance(document, response.getOutputStream());
     } else if ("rtf".equals(presentationtype)) {
       response.setContentType("text/rtf");
       RtfWriter2.getInstance(document, response.getOutputStream());
     } 
     document.open();
     document.add(new Paragraph("Hello World"));
     document.add(new Paragraph(new Date().toString()));
   } catch (DocumentException de) {
     de.printStackTrace();
     System.err.println("document: " + de.getMessage());
   }
   document.close();
 }

}</source>

Set ContentType and transfer Pdf document to client

   <source lang="java">

import java.io.ByteArrayOutputStream; import java.io.IOException; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.lowagie.text.Chunk; import com.lowagie.text.Document; import com.lowagie.text.Paragraph; import com.lowagie.text.pdf.PdfWriter; public class OutSimplePdf extends HttpServlet {

 public void init(ServletConfig config) throws ServletException {
   super.init(config);
 }
 public void doGet(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   makePdf(request, response, "GET");
 }
 protected void doPost(HttpServletRequest request,
     HttpServletResponse response) throws ServletException, IOException {
   makePdf(request, response, "POST");
 }
 public void makePdf(HttpServletRequest request,
     HttpServletResponse response, String methodGetPost)
     throws ServletException, IOException {
   try {
     String msg = "your message";
     Document document = new Document();
     ByteArrayOutputStream baos = new ByteArrayOutputStream();
     PdfWriter.getInstance(document, baos);
     document.open();
     document.add(new Paragraph(msg));
     document.add(Chunk.NEWLINE);
     document.add(new Paragraph("a paragraph"));
     document.close();
     response.setHeader("Expires", "0");
     response.setHeader("Cache-Control","must-revalidate, post-check=0, pre-check=0");
     response.setHeader("Pragma", "public");
     response.setContentType("application/pdf");
     response.setContentLength(baos.size());
     ServletOutputStream out = response.getOutputStream();
     baos.writeTo(out);
     out.flush();
   } catch (Exception e2) {
     System.out.println("Error in " + getClass().getName() + "\n" + e2);
   }
 }
 public void destroy() {
 }

}</source>