Hi Simon,
You can post files to a servlet. The servlet can read from the
input stream and save to a desired location.
The other way is to use a MultiPart file upload program provided by O'reilly.
You can download this package from
servlets.com , this logic is also explained in the Jason Hunter book Java
Servlet Programming , O'reilly Publication.
However if you want code I'm using , here it is. Although this code has file
size and type limitation.
Here is the code , you may have to alter it to suit your scenario and
requirements
Santosh
Client Code - where client is your interface that will post files , could be JSP
, Servlet or even a Java app
// Get connection to Upload Servlet
String url ="http://your_server/servlet/UploadServlet?filename="+filename;
URL theURL = new URL(url);
HttpURLConnection theConnection =
(HttpURLConnection)theURL.openConnection();
theConnection.setRequestMethod("POST");
theConnection.setDoOutput(true);
theConnection.setUseCaches(false);
PrintWriter out = new PrintWriter(theConnection.getOutputStream());
// Read File
String line = null;
FileReader f1 = new FileReader(filename);
BufferedReader theReader = new BufferedReader(f1);
// Send each line to Servlet
while ((line = theReader.readLine()) != null)
{
out.println(line);
}
out.close();
System.out.println("Data Written");
// Get Response
System.out.println("Response: ");
String inputLine;
InputStream in = theConnection.getInputStream();
BufferedReader responseReader =
new BufferedReader(new InputStreamReader(in));
//StringBuffer buf = new StringBuffer();
System.out.println("before while");
while ((inputLine = responseReader.readLine()) != null)
{
System.out.println(inputLine);
}
}
catch (UnknownServiceException e)
{
System.out.println("Unknown Service Exception Caught: \n" + e);
}
}
UploadServlet Code
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
/*------------------------------------------------------------------------------
* Upload Servlet
*-----------------------------------------------------------------------------*/
public class UploadServlet extends HttpServlet
{
/*----------------------------------------------------------------------------
* Data
* Modify directory to where you want to store uploaded files!
*---------------------------------------------------------------------------*/
private static String m_uploadDirectory = "E:\\uploadlog";
/*----------------------------------------------------------------------------
* doGet
*---------------------------------------------------------------------------*/
public void doGet (HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
System.out.println("UploadServlet.doGet()");
response.setContentType("application/octet-stream");
// Write the data of the response
PrintWriter out = response.getWriter();
out.println("<HTML><HEAD><TITLE>");
out.println(title);
out.println("</TITLE></HEAD><BODY>");
out.println("<H1>" + title + "</H1>");
out.println("<P>This is output from UploadServlet");
out.println("</BODY></HTML>");
out.close();
}
/*----------------------------------------------------------------------------
* doPost
*---------------------------------------------------------------------------*/
public void doPost (HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
BufferedWriter uploadFile = null;
try
{
System.out.println("UploadServlet.doPost()");
System.out.println("CONTENT: " + request.getContentType());
System.out.println("LENGTH : " + request.getContentLength());
// Get the Input Stream
ServletInputStream input = request.getInputStream();
BufferedReader theReader =
new BufferedReader(new InputStreamReader(input));
filename = request.getParameter("filename");
String uploadFileName = m_uploadDirectory + '\\' + filename;
System.out.println("Creating File "+filename);
uploadFile = new BufferedWriter(new FileWriter(uploadFileName));
System.out.println("File Creation Completed"+filename);
String line = null;
while ((line = theReader.readLine()) != null)
{
uploadFile.write(line);
uploadFile.newLine();
}
response.setContentType("application/octet-stream");
System.out.println("CONTENT: " + request.getContentType());
System.out.println("LENGTH : " + request.getContentLength());
PrintWriter out = response.getWriter();
out.println("any message u want to send back to the client");
out.close();
}
catch (Exception e)
{
System.out.println(e);
response.setContentType("application/octet-stream");
PrintWriter out = response.getWriter();
out.println("ERROR\n:" + e);
out.close();
}
finally
{
if (uploadFile != null)
{
uploadFile.close();
}
}
}
}
Clair e Simon <[EMAIL PROTECTED]> on 05/15/2001 09:17:39 AM
Please respond to A mailing list about Java Server Pages specification and
reference <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
cc: (bcc: Santosh Daryani/IT/Aon Consulting)
Subject: JSP Upload
Hi Everyone,
I'm doing a web site in JSP and I need to upload files in a folder on my server.
Someone know how to do this or where on the Net I could have more information?
Thank you
Simon
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http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
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