JAVA source code for upload & download a file from SERVER ?

AVA SOURCE CODE FOR File upload and download

package com.resource.util;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
/**
* This class is used to upload a file to a FTP server.
*
* @author Muthu */
public class FileUpload
{
/**
* Upload a file to a FTP server. A FTP URL is generated with the
* following syntax:

* ftp://user:password@host:port/filePath;type=i.
*
* @param ftpServer , FTP server address (optional port ':portNumber').
* @param user , Optional user name to login.
* @param password , Optional password for user.
* @param fileName , Destination file name on FTP server (with optional

* preceding relative path, e.g. "myDir/myFile.txt").
* @param source , Source file to upload.
* @throws MalformedURLException, IOException on error.
public void upload( String ftpServer, String user, String password,
String fileName, File source ) throws MalformedURLException,
IOException
{

if (ftpServer != null && fileName != null && source != null)
{StringBuffer sb = new StringBuffer( "ftp://" );
// check for authentication else assume its anonymous access.
if (user != null && password != null)
{ sb.append( user );
sb.append( ':' );
sb.append( password );
sb.append( '@' );
}
sb.append( ftpServer );
sb.append( '/' );
sb.append( fileName );
/*
* type ==> a=ASCII mode, i=image (binary) mode, d= file directory
* listing
*/
sb.append( ";type=i" );
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
try {
URL url = new URL( sb.toString() );
URLConnection urlc = url.openConnection();
bos = new BufferedOutputStream( urlc.getOutputStream() );
bis = new BufferedInputStream( new FileInputStream( source ) );
int i; //
read byte by byte until end of stream
while ((i = bis.read()) != -1)
{
bos.write( i );
} }
finally {
if (bis != null)
try {
bis.close();
}
catch (IOException ioe)
{
ioe.printStackTrace();
}
if (bos != null)
try { bos.close(); }
catch (IOException ioe)
{
ioe.printStackTrace();
}
} }
else {
System.out.println( "Input not available." );
} }
/**
* Download a file from a FTP server. A FTP URL is generated with the
* following syntax:
* ftp://user:password@host:port/filePath;type=i.
*
* @param ftpServer , FTP server address ( optional port ':portNumber').
* @param user , Optional user name to login.
* @param password , Optional password for user.
* @param fileName , Name of file to download (with optional preceeding
* relative path, e.g. one/two/three.txt).
* @param destination , Destination file to save.
* @throws MalformedURLException, IOException on error.
*/
public void download( String ftpServer, String user, String password,
String fileName, File destination ) throws MalformedURLException,
IOException
{
if ( ftpServer != null && fileName != null && destination != null)
{
StringBuffer sb = new StringBuffer( "ftp://" );
// check for authentication else assume its anonymous access.
if (user != null && password != null) {
sb.append( user );
sb.append( ':' );
sb.append( password );
sb.append( '@' );
}
sb.append( ftpServer );
sb.append( '/' );
sb.append( fileName );
/*
* type ==> a=ASCII mode, i=image (binary) mode, d= file directory
* listing
*/
sb.append( ";type=i" );
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
try {
URL url = new URL( sb.toString() );
URLConnection urlc = url.openConnection();
bis = new BufferedInputStream( urlc.getInputStream() );
bos = new BufferedOutputStream( new FileOutputStream( destination.getName() ) );
int i;
while ((i = bis.read()) != -1)
{ bos.write( i );
} }
finally {
if (bis != null) try { bis.close();
}
catch (IOException ioe)
{ ioe.printStackTrace();
}
if (bos != null)
try {
bos.close();
}
catch (IOException ioe)
{
ioe.printStackTrace();
}
}
}
else {
System.out.println( "Input not available" );
}
}
}