Transformar txt ou doc em pdf

import java.awt.Component;
import java.awt.Font;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JProgressBar;

public class GeraArquivo {

	public static void gerar(String texto, String nfile){
		java.io.FileOutputStream fos;
		  JOptionPane alert;
		  File file;
	
		  try{

				file = new File("C:\\" + nfile);
				if (file.exists()){                              /**se o arquivo a ser gerado existe*/
																
					file.delete(); 							   /**arquivo sera apagado            */
					fos = new java.io.FileOutputStream(file); /**e sera gerado novo arquivo      */
					fos.write(texto.getBytes());             /**passando o texto(valor) qualquer*/
															
					fos.flush();                           /**finaliza o arquivo              */
					fos.close();                          /**fecha o arquivo                 */
					
					JOptionPane.showMessageDialog(null, "Arquivo " + nfile.toString() + " criado com sucesso!");
					
				}else{
					
					fos = new java.io.FileOutputStream(file);
					fos.write(texto.getBytes());
					fos.flush();
					
					fos.close();
					JOptionPane.showMessageDialog(null, "Arquivo " + nfile.toString() + " criado com sucesso!");

				}
		  }catch(Exception e){
				JOptionPane.showMessageDialog(null, "Ocorreu um Erro ao Gerar o arquivo.");
		  }
	}

	public static void main(String args[]){
	new GeraArquivo().gerar("Teste", "arquivo.txt");
	}	  
}

public void doGet( HttpServletRequest request, HttpServletResponse response ) throws ServletException, IOException {
	ServletOutputStream sos = response.getOutputStream( );
	try {
		ByteArrayOutputStream baos = new ByteArrayOutputStream( );

		Document document = new Document( );
		PdfWriter.getInstance( document, baos );
		document.open( );

		BufferedReader br = new BufferedReader( new FileReader( (String)request.getSession( ).getAttribute( "fakefile" ) ) );
		request.getSession( ).removeAttribute( "fakefile" );

		String strLinha = null;
		boolean bVazio = false;
		while( ( strLinha = br.readLine( ) ) != null ) {
			document.add( new Paragraph( strLinha ) );
			bVazio = true;
		}
		if( !bVazio ) {
			document.add( new Paragraph( " " ) );
		}
		document.close( );
		br.close( );

		response.setContentType  ( "application/pdf" );
		response.setHeader       ( "Expires", "0" );
		response.setHeader       ( "Cache-Control","must-revalidate, post-check=0, pre-check=0" );
		response.setHeader       ( "Pragma", "no-cache" ); //HTTP 1.0
		response.setDateHeader   ( "Expires", 0 ); //prevents caching at the proxy server
		response.setHeader       ( "Cache-Control", "no-cache" ); //HTTP 1.1
		response.setHeader       ( "Cache-Control", "max-age=0" );
		response.setContentLength( baos.toByteArray( ).length );

		baos.writeTo( sos );
		baos.close( );
		sos.flush( );
		sos.close( );
	} catch( IOException e ) {
		sos.flush( );
		sos.close( );
	} catch( Exception e ) {
		sos.flush( );
		sos.close( );
	} finally {
		sos.flush( );
		sos.close( );
	}
}

import com.lowagie.text.<em>;

import com.lowagie.text.pdf.</em>;

import <a href="http://java.io">java.io</a>.*;