FTP implementation of large file upload download

Java implementation ftp upload download functionJava FTP client Toolkit for many, here I choose Apache's ftpclient. The acquisition of this package can be obtained by [Url]http://commons.apache.org/net/[/url], and I am using the latest commons-net-1.4.1.zip. It contains a number of Java Network Programming Toolkit, the official documentation listed below:
The Support network protocol is as follows:
Ftp
NNTP
Smtp
POP3
Telnet
Tftp
Finger
Whois
Rexec/rcmd/rlogin
Time (rdate) and daytime
Echo
Discard
Ntp/sntp
are very useful.   Here I use some of the FTP-related packages. Before you write your program, configure a simple FTP server, as shown in the following figure:
Here is a use of ftpclient to achieve the FTP upload and download functions, mainly for this package has a perceptual understanding. The routine is as follows: Import org.apache.commons.io.IOUtils;
Import org.apache.commons.net.ftp.FTPClient;

Import Java.io.File;
Import Java.io.FileInputStream;
Import java.io.IOException;
Import Java.io.FileOutputStream;

/**
* Apache Commons-net Try one to see what the FTP client tools do
*
* @author: leizhimin,2008-8-20 14:00:38. <p>
*/
public class Ftptest {
public static void Main (string[] args) {
Testupload ();
Testdownload ();
}

/**
* FTP upload a single file test
*/
public static void Testupload () {
FtpClient ftpclient = new FtpClient ();
FileInputStream FIS = null;

try {
Ftpclient.connect ("192.168.14.117");
Ftpclient.login ("admin", "123");

File Srcfile = new file ("C:\\new.gif");
FIS = new FileInputStream (srcfile);
Set up upload Directory
Ftpclient.changeworkingdirectory ("/admin/pic");
Ftpclient.setbuffersize (1024);
Ftpclient.setcontrolencoding ("GBK");
Set file type (binary)
Ftpclient.setfiletype (Ftpclient.binary_file_type);
Ftpclient.storefile ("3.gif", FIS);
catch (IOException e) {
E.printstacktrace ();
throw new RuntimeException ("FTP client error. ", e);
finally {
ioutils.closequietly (FIS);
try {
Ftpclient.disconnect ();
catch (IOException e) {
E.printstacktrace ();
throw new RuntimeException ("Shutdown FTP connection) exception occurred." ", e);
}
}
}

/**
* FTP Download a single file test
*/
public static void Testdownload () {
FtpClient ftpclient = new FtpClient ();
FileOutputStream fos = null;

try {
Ftpclient.connect ("192.168.14.117");
Ftpclient.login ("admin", "123");

String remotefilename = "/admin/pic/3.gif";
FOS = new FileOutputStream ("C:/down.gif");

Ftpclient.setbuffersize (1024);
Set file type (binary)
Ftpclient.setfiletype (Ftpclient.binary_file_type);
Ftpclient.retrievefile (Remotefilename, FOS);
catch (IOException e) {
E.printstacktrace ();
throw new RuntimeException ("FTP client error. ", e);
finally {
ioutils.closequietly (FOS);
try {
Ftpclient.disconnect ();
catch (IOException e) {
E.printstacktrace ();
throw new RuntimeException ("Shutdown FTP connection) exception occurred." ", e);
}
}
}
}
  test results show that file upload and download are successful.   feel that Apache is doing a good job with this.