JAVA in the use of ftpclient implementation file upload download __java

In the Java program, often need to deal with FTP, such as uploading files to the FTP server, download files, this article briefly describes how to use the FtpClient in the Jakarta Commons (in the Commons-net package) to achieve upload download files.

The jar packages used are:

Commons-net-1.4.1.jar

Jakarta-oro.jar

First, upload files to view the source print?

01	File Upload source code

02

/**

03	* Description: Uploading files to FTP server

04	* @Version1.0

05	* @param URL FTP server hostname

06	* @param port FTP server ports

07	* @param username FTP login Account

08	* @param password FTP login password

09	* @param path FTP server save directory

10	* @param filename uploaded to the FTP server

11	* @param input stream

12	* @return Returns True successfully, otherwise returns false

13

*/

14	public static Boolean UploadFile (

15	String URL,//FTP Server hostname

16	int PORT,//FTP Server Port

17	String username,//FTP login account

18	String password,//ftp login password

19	String path,//ftp server save directory

20	String filename,//Upload file name on FTP server

21st	InputStream input//input stream

22

) {

23	Boolean success = false;

24	ftpclient ftp = new FtpClient ();

25

try {

26	int reply;

27	Ftp.connect (URL, port);//Connect FTP server

28	If you use the default port, you can connect to the FTP server directly using the Ftp.connect (URL) method

29	Ftp.login (username, password);/Login

30	Reply = Ftp.getreplycode ();

31	if (! Ftpreply.ispositivecompletion (Reply)) {

32	Ftp.disconnect ();

33	return success;

34

}

35	Ftp.changeworkingdirectory (path);

36	Ftp.storefile (filename, input);

37

38	Input.close ();

39	Ftp.logout ();

40	Success = true;

41	catch (IOException e) {

42	E.printstacktrace ();

43

finally {

44	if (ftp.isconnected ()) {

45

try {

46	Ftp.disconnect ();

47	catch (IOException IoE) {

48

}

49

}

50

}

51	return success;

52

}

The following is a file upload test case: Check the source print?

01

/**

02	* Upload the local file to the FTP server

03

*

04

*/

05	public void Testuploadfromdisk () {

06

try {

07	FileInputStream in=new FileInputStream (New File ("D:/test.txt"));

08	Boolean flag = UploadFile ("127.0.0.1", "Administrator", "zyuc2011", "Test", "test.txt", in);

09	SYSTEM.OUT.PRINTLN (flag);

10	catch (FileNotFoundException e) {

11	E.printstacktrace ();

12

}

13

}

View the source print?

01

/**

02	* Generate a file on the FTP server and write a string to the file

03

*

04

*/

05	public void testuploadfromstring () {

06

try {

07	String str = "This is the string to write." ";

08	InputStream input = new Bytearrayinputstream (str.getbytes ("Utf-8"));

09	Boolean flag = UploadFile ("127.0.0.1", "Administrator", "zyuc2011", "Test", "test.txt", input);

10	SYSTEM.OUT.PRINTLN (flag);

11	catch (Unsupportedencodingexception e) {

12	E.printstacktrace ();

13

}

14

}

Second, File download view source printing?

01	File Download Source code

02

/**

03	* Description: Downloading files from FTP server

04