Getting file size

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November 11, 2008 at 12:31 AM

Hi friend,

<%@ page language="java" %>

<HTml>

<HEAD>
<TITLE>Display file upload form to the user</TITLE>

</HEAD>

<% // for uploading the file we used Encrypt type of multipart/form-data and input of file type to browse and submit the file %>

<BODY>
<FORM ENCTYPE="multipart/form-data" ACTION="SingleFileUpload_Action.jsp" METHOD=POST>

<br><br><br>

<center>
<table border="2" bgcolor=#ccFDD00 cellspacing="0" cellpadding="0">

<tr>
<center>
<td colspan="2">
<p align="center"><B>Single file Uploading in JSP</B>
<center>
</td></tr>
<tr><td><b>Choose the file To Upload:</b></td>

<td><INPUT NAME="F1" TYPE="file" size="40"></td></tr>

<tr>
<td colspan="2">
<p align="center">
<INPUT TYPE="submit" VALUE="Send File" ></p></td></tr>

</table>

</center>

</FORM>

</BODY>

</HTML>

-------------------------------------------

November 11, 2008 at 12:34 AM

file action code.

<%@ page import="java.io.*" %>

<%

//to get the content type information from JSP Request Header

String contentType = request.getContentType();

//here we are checking the content type is not equal to Null and as well as the passed data from mulitpart/form-data is greater than or equal to 0

if ((contentType != null) && (contentType.indexOf("multipart/form-data") >= 0)) {

DataInputStream in = new DataInputStream(request.getInputStream());

//we are taking the length of Content type data

int formDataLength = request.getContentLength();

byte dataBytes[] = new byte[formDataLength];

int byteRead = 0;

int totalBytesRead = 0;

//this loop converting the uploaded file into byte code

while(totalBytesRead < formDataLength) {

byteRead = in.read(dataBytes, totalBytesRead, formDataLength);

totalBytesRead += byteRead;

}

String file = new String(dataBytes);

//for saving the file name

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());

int pos;

//extracting the index of file

pos = file.indexOf("filename=\"");

pos = file.indexOf("\n", pos) + 1;

pos = file.indexOf("\n", pos) + 1;

pos = file.indexOf("\n", pos) + 1;

int boundaryLocation = file.indexOf(boundary, pos) - 4;

int startPos = ((file.substring(0, pos)).getBytes()).length;

int endPos = ((file.substring(0, boundaryLocation)).getBytes()).length;

// creating a new file with the same name and writing the content in new file

FileOutputStream fileOut = new FileOutputStream(saveFile);

fileOut.write(dataBytes, startPos, (endPos - startPos));

fileOut.flush();

fileOut.close();

%><Br><table border="2"><tr><td><b>You have successfully upload the file by the name of:</b>

<% out.println(saveFile); %></td></tr></table> <%

}

%>

-------------------------------------------------

Visit for more information.

http://www.roseindia.net/jsp/file_upload/index.shtml

Thanks.