Java/Servlets/Send File

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Another servlet to Send PDF

   <source lang="java">

import java.io.BufferedInputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class SendPdf extends HttpServlet {

 public void doGet(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   //get the "file" parameter
   String fileName = (String) request.getParameter("file");
   if (fileName == null || fileName.equals(""))
     throw new ServletException(
         "Invalid or non-existent file parameter in SendPdf servlet.");
   // add the .pdf suffix if it doesn"t already exist
   if (fileName.indexOf(".pdf") == -1)
     fileName = fileName + ".pdf";
   String pdfDir = getServletContext().getInitParameter("pdf-dir");
   if (pdfDir == null || pdfDir.equals(""))
     throw new ServletException(
         "Invalid or non-existent "pdf-Dir" context-param.");
   ServletOutputStream stream = null;
   BufferedInputStream buf = null;
   try {
     stream = response.getOutputStream();
     File pdf = new File(pdfDir + "/" + fileName);
     response.setContentType("application/pdf");
     response.addHeader("Content-Disposition", "attachment; filename="
         + fileName);
     response.setContentLength((int) pdf.length());
     FileInputStream input = new FileInputStream(pdf);
     buf = new BufferedInputStream(input);
     int readBytes = 0;
     while ((readBytes = buf.read()) != -1)
       stream.write(readBytes);
   } catch (IOException ioe) {
     throw new ServletException(ioe.getMessage());
   } finally {
     if (stream != null)
       stream.close();
     if (buf != null)
       buf.close();
   }
 }
 public void doPost(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   doGet(request, response);
 }

}

      </source>
   
  
 
  



Another servlet to Send XML

   <source lang="java">

import java.io.BufferedInputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class SendXml extends HttpServlet {

 public void doGet(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   //get the "file" parameter
   String fileName = (String) request.getParameter("file");
   if (fileName == null || fileName.equals(""))
     throw new ServletException(
         "Invalid or non-existent file parameter in SendXml servlet.");
   // add the .doc suffix if it doesn"t already exist
   if (fileName.indexOf(".xml") == -1)
     fileName = fileName + ".xml";
   String xmlDir = getServletContext().getInitParameter("xml-dir");
   if (xmlDir == null || xmlDir.equals(""))
     throw new ServletException(
         "Invalid or non-existent xmlDir context-param.");
   ServletOutputStream stream = null;
   BufferedInputStream buf = null;
   try {
     stream = response.getOutputStream();
     File xml = new File(xmlDir + "/" + fileName);
     response.setContentType("text/xml");
     response.addHeader("Content-Disposition", "attachment; filename="
         + fileName);
     response.setContentLength((int) xml.length());
     FileInputStream input = new FileInputStream(xml);
     buf = new BufferedInputStream(input);
     int readBytes = 0;
     while ((readBytes = buf.read()) != -1)
       stream.write(readBytes);
   } catch (IOException ioe) {
     throw new ServletException(ioe.getMessage());
   } finally {
     if (stream != null)
       stream.close();
     if (buf != null)
       buf.close();
   }
 }
 public void doPost(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   doGet(request, response);
 }

}

      </source>
   
  
 
  



Send mp3

   <source lang="java">

import java.io.BufferedInputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class SendMp3 extends HttpServlet {

 public void doGet(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   String fileName = (String) request.getParameter("file");
   if (fileName == null || fileName.equals(""))
     throw new ServletException(
         "Invalid or non-existent file parameter in SendMp3 servlet.");
     if (fileName.indexOf(".mp3") == -1)
     fileName = fileName + ".mp3";
   String mp3Dir = getServletContext().getInitParameter("mp3-dir");
   if (mp3Dir == null || mp3Dir.equals(""))
     throw new ServletException(
         "Invalid or non-existent mp3Dir context-param.");
   ServletOutputStream stream = null;
   BufferedInputStream buf = null;
   try {
     stream = response.getOutputStream();
     File mp3 = new File(mp3Dir + "/" + fileName);
     //set response headers
     response.setContentType("audio/mpeg");
     response.addHeader("Content-Disposition", "attachment; filename="
         + fileName);
     response.setContentLength((int) mp3.length());
     FileInputStream input = new FileInputStream(mp3);
     buf = new BufferedInputStream(input);
     int readBytes = 0;
     //read from the file; write to the ServletOutputStream
     while ((readBytes = buf.read()) != -1)
       stream.write(readBytes);
   } catch (IOException ioe) {
     throw new ServletException(ioe.getMessage());
   } finally {
     if (stream != null)
       stream.close();
     if (buf != null)
       buf.close();
   }
 }
 public void doPost(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   doGet(request, response);
 }

}

      </source>
   
  
 
  



Send PDF file

   <source lang="java">

import java.io.BufferedInputStream; import java.io.IOException; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class UrlServlet extends HttpServlet {

 public void doGet(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   //get the "file" parameter
   String fileName = (String) request.getParameter("file");
   if (fileName == null || fileName.equals(""))
     throw new ServletException(
         "Invalid or non-existent file parameter in UrlServlet servlet.");
   if (fileName.indexOf(".pdf") == -1)
     fileName = fileName + ".pdf";
   URL pdfDir = null;
   URLConnection urlConn = null;
   ServletOutputStream stream = null;
   BufferedInputStream buf = null;
   try {
     pdfDir = new URL(getServletContext().getInitParameter(
         "remote-pdf-dir")
         + fileName);
   } catch (MalformedURLException mue) {
     throw new ServletException(mue.getMessage());
   }
   try {
     stream = response.getOutputStream();
     //set response headers
     response.setContentType("application/pdf");
     response.addHeader("Content-Disposition", "attachment; filename="
         + fileName);
     urlConn = pdfDir.openConnection();
     response.setContentLength((int) urlConn.getContentLength());
     buf = new BufferedInputStream(urlConn.getInputStream());
     int readBytes = 0;
     //read from the file; write to the ServletOutputStream
     while ((readBytes = buf.read()) != -1)
       stream.write(readBytes);
   } catch (IOException ioe) {
     throw new ServletException(ioe.getMessage());
   } finally {
     if (stream != null)
       stream.close();
     if (buf != null)
       buf.close();
   }
 }
 public void doPost(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   doGet(request, response);
 }

}

      </source>
   
  
 
  



Send word document

   <source lang="java">

import java.io.BufferedInputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class SendWord extends HttpServlet {

 public void doGet(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   //get the "file" parameter
   String fileName = (String) request.getParameter("file");
   if (fileName == null || fileName.equals(""))
     throw new ServletException(
         "Invalid or non-existent file parameter in SendWord servlet.");
   // add the .doc suffix if it doesn"t already exist
   if (fileName.indexOf(".doc") == -1)
     fileName = fileName + ".doc";
   String wordDir = getServletContext().getInitParameter("word-dir");
   if (wordDir == null || wordDir.equals(""))
     throw new ServletException(
         "Invalid or non-existent wordDir context-param.");
   ServletOutputStream stream = null;
   BufferedInputStream buf = null;
   try {
     stream = response.getOutputStream();
     File doc = new File(wordDir + "/" + fileName);
     response.setContentType("application/msword");
     response.addHeader("Content-Disposition", "attachment; filename="
         + fileName);
     response.setContentLength((int) doc.length());
     FileInputStream input = new FileInputStream(doc);
     buf = new BufferedInputStream(input);
     int readBytes = 0;
     while ((readBytes = buf.read()) != -1)
       stream.write(readBytes);
   } catch (IOException ioe) {
     throw new ServletException(ioe.getMessage());
   } finally {
     if (stream != null)
       stream.close();
     if (buf != null)
       buf.close();
   }
 }
 public void doPost(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   doGet(request, response);
 }

}

      </source>
   
  
 
  



Send XML

   <source lang="java">

import java.io.BufferedInputStream; import java.io.IOException; import java.io.PrintWriter; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class ResourceServlet extends HttpServlet {

 public void doGet(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   //get web.xml for display by a servlet
   String file = "/WEB-INF/web.xml";
   URL url = null;
   URLConnection urlConn = null;
   PrintWriter out = null;
   BufferedInputStream buf = null;
   try {
     out = response.getWriter();
     url = getServletContext().getResource(file);
     //set response header
     response.setContentType("text/xml");
     urlConn = url.openConnection();
     //establish connection with URL presenting web.xml
     urlConn.connect();
     buf = new BufferedInputStream(urlConn.getInputStream());
     int readBytes = 0;
     while ((readBytes = buf.read()) != -1)
       out.write(readBytes);
   } catch (MalformedURLException mue) {
     throw new ServletException(mue.getMessage());
   } catch (IOException ioe) {
     throw new ServletException(ioe.getMessage());
   } finally {
     if (out != null)
       out.close();
     if (buf != null)
       buf.close();
   }
 }
 public void doPost(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   doGet(request, response);
 }

}

      </source>