Hello,
We are in the process of developing a J2EE application. In this, we require to upload a file from client end to server end. What are the posible ways to do this? Is Applet the only way?

Thanks and Regards,
Pankaj.

You can do it with a Servlet.
Here's some sample code.

public void doPost(HttpServletRequest req, HttpServletResponse
                            res) {
                            PrintWriter out = null;
                            DataInputStream in = null;
                            FileOutputStream fileOut = null;
                            rootPath = "c:\\upload
";
                            try {
                            res.setContentType("text/html");
                            out = res.getWriter();
                            String contentType = req.getContentType();
                            java.util.Enumeration enum =
                            req.getParameterNames();
                            while(enum.hasMoreElements()) {
                            out.println(" param = " +
                            (String)enum.nextElement());
                            }
                            out.println(contentType);
                            if ((contentType != null)
                            && (contentType.indexOf("multipart/form-
                            data") >= 0)) {
                            in = new DataInputStream
                            (req.getInputStream());
                            int formDataLength = req.getContentLength
                            ();

                            out.println("1<br>");
                            if (formDataLength > MAX_SIZE) {
                            out.println("Sorry file is too
                            large ");
                            out.flush();
                            return;

                            }
                            out.println("2<br>");
                            byte dataBytes[] = new byte
                            [formDataLength];
                            int byteRead = 0;
                            int totalBytesRead = 0;
                            while (totalBytesRead < formDataLength) {
                            byteRead = in.read(dataBytes,
                            totalBytesRead, formDataLength);
                            totalBytesRead += byteRead;

                            }
                            out.println("3<br>");

                            String file = new String(dataBytes);
                            String saveFile = file.substring
                            (file.indexOf("filename=\"") + 10);
                            saveFile = saveFile.substring(0,
                            saveFile.indexOf("\n"));
                            saveFile =
                            saveFile.substring
                            (saveFile.lastIndexOf("
") + 1, saveFile.indexOf("\""));
                            int lastIndex = contentType.lastIndexOf
                            ("=");
                            String boundary = contentType.substring
                            (lastIndex + 1, contentType.length());


The rest of the code got cutoff because TSS had a message length restriction.

Hello Sheng,
I couldn't get complete code. Can you please send it back to pankaj08 at sify dot com. I will be thankfull to you.

Thanks and Regards,
Pankaj.

the propably best way to do this is using jason hunters MultipartRequest, see www.servlets.com for details and code downloads.


Regards,
Kari