Apache ftpclient download example

While trying to retrieve the file from FTP, we are testing the negative scenario and passing the wrong file name, but did not get any exception like file not found exception. How to deal with this scenario? If possible please reply to my mail id pvenkatiitm gmail.

Hi, Connection is not being established using this code. Here ip is an IP Address. This is what I am getting Conncetion Exception: java. ConnectException: Connection refused: connect. If that works, this should work too. Your code save me. Your email address will not be published. Prev Java Temp File. Pankaj I love Open Source technologies and writing about my experience about them is my passion.

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Improve this question. Anirban Anirban 3 3 gold badges 15 15 silver badges 40 40 bronze badges. Can you share some code snippets. Add a comment. Active Oldest Votes. April 4, at am. Pankaj says:. Kotesh says:. April 2, at pm. April 3, at am. April 3, at pm. Phil says:. March 19, at pm. March 20, at am. March 20, at pm. Sergio says:. November 14, at pm. Santo says:. October 17, at pm. September 5, at pm.

September 9, at am. Nilesh says:. August 23, at pm. August 24, at am. Revathi says:. July 8, at pm. July 9, at am. Java Web Hosting says:. July 3, at pm. Leave a Reply Cancel reply Your email address will not be published. Leave this field empty. Exact matches only. Search in title. Search in content. Search in excerpt. Use this method only for data transfers between the client and server.

This method causes a PASV or EPSV command to be issued to the server before the opening of every data connection, telling the server to open a data port to which the client will connect to conduct data transfers.

Use this method only for server to server data transfers. This method issues a PORT command to the server, indicating the other server and port to which it should connect for data transfers.

You also must remember to call enterLocalActiveMode if you wish to return to the normal data connection mode. Parameters: host - The passive mode server accepting connections for data transfers. This method issues a PASV command to the server, telling it to open a data port to which the active server will connect to conduct data transfers.

The server may reply with a list of server-supported extensions. Throws: IOException - on error Since: 2. Caches the parsed response to avoid resending the command repeatedly. Parameters: feature - the feature to check Returns: if the feature is present, returns the feature value or the empty string if the feature exists but has no value.

Returns null if the feature is not found or the command failed. Check FTP. Throws: IOException - on error Since: 3. Parameters: feature - the feature to check Returns: if the feature is present, returns the feature values empty array if none Returns null if the feature is not found or the command failed. Returns: true, if automatic server encoding detection is enabled. Returns: The current buffer size.

Returns: wait time in milliseconds. See the class Javadoc section "Control channel keep-alive feature:" Returns: the number of seconds between keepalive messages. Returns: the listener, may be null Since: 3. Parameters: pathname - The file path to query. Since: 2. If not in passive mode, returns null. Returns: The passive host name if in passive mode, otherwise null.

Useful when there are multiple network cards. Returns: The local IP address in passive mode. Returns: The data port of the passive server. If not in passive mode, undefined. Returns: offset The offset into the remote file at which to start the next file transfer. This should produce the size of the file. Parameters: pathname - the file name Returns: The size information returned by the server; null if there was an error Throws: FTPConnectionClosedException - If the FTP server prematurely closes the connection as a result of the client being idle or some other reason causing the server to send FTP reply code Returns: The status information returned by the server.

This should produce a listing of the file or directory. Parameters: pathname - the file name Returns: The status information returned by the server. This value is cached for the duration of the connection after the first call to this method.

FTPClient will remember the value and return the cached value until a call to disconnect. Returns: The system type obtained from the server.

Never null. Parameters: feature - the name of the feature; it is converted to upper case. Returns: true if the feature is present, false if the feature is not present or the FTP.

This method differs from using the listFiles methods in that expensive FTPFile objects are not created until needed which may be an advantage on large lists. Returns: A FTPListParseEngine object that holds the raw information and is capable of providing parsed FTPFile objects, one for each file containing information contained in the given path in the format determined by the parser parameter. Null will be returned if a data connection cannot be opened. If the current working directory contains no files, an empty array will be the return.

ParserInitializationException - Thrown if the autodetect mechanism cannot resolve the type of system we are connected with. This information is obtained through the LIST command. The server may or may not expand glob expressions. You should avoid using glob expressions because the return format for glob listings differs from server to server and will likely cause this method to fail.

Parameters: parserKey - A string representing a designated code or fully-qualified class name of an FTPFileEntryParser that should be used to parse each server file listing. ParserInitializationException - Thrown if the parserKey parameter cannot be resolved by the selected parser factory.

In the DefaultFTPEntryParserFactory, this will happen when parserKey is neither the fully qualified class name of a class implementing the interface org. FTPFileEntryParser nor a string containing one of the recognized keys mapping to such a parser or if class loader security issues prevent its being loaded.

Parameters: pathname - the path from where to MLSD. Returns: the engine. Throws: IOException - on error isRemoteVerificationEnabled public boolean isRemoteVerificationEnabled Return whether or not verification of the remote host participating in data connections is enabled. The default behavior is for verification to be enabled. Returns: True if verification is enabled, false if not.

For recent files, the response usually contains hours and minutes not seconds. For older files, the output may only contain a date. If the server supports it, the MLSD command returns timestamps with a precision of seconds, and may include milliseconds. See mlistDir Returns: The list of directories contained in the current directory in the format determined by the autodetection mechanism.

See mlistDir Parameters: parent - the starting directory Returns: The list of directories contained in the specified directory in the format determined by the autodetection mechanism. See mlistDir Returns: The list of file information contained in the current directory in the format determined by the autodetection mechanism.

NOTE: This array may contain null members if any of the individual file listings failed to parse. The caller should check each entry for null before referencing it. See mlistDir Parameters: pathname - The file or directory to list. Since the server may or may not expand glob expressions, using them here is not recommended and may well cause this method to fail. Also, some servers treat a leading '-' as being an option.

To avoid this interpretation, use an absolute pathname or prefix the pathname with. Some servers may support "--" as meaning end of options, in which case "-- -xyz" should work.

Returns: The list of file information contained in the given path in the format determined by the autodetection mechanism Throws: FTPConnectionClosedException - If the FTP server prematurely closes the connection as a result of the client being idle or some other reason causing the server to send FTP reply code Returns: The system help string obtained from the server.

Parameters: command - The command on which to ask for help. Returns: The command help string obtained from the server. If the current directory contains no files, a zero length array is returned only if the FTP server returned a positive completion code, otherwise, null is returned the FTP server returned a error No files found.

If the directory is not empty, an array of file names in the directory is returned. Returns: The list of file names contained in the current working directory.

If there are no file names in the directory, a zero-length array is returned. This information is obtained through the NLST command. If the given pathname is a directory and contains no files, a zero length array is returned only if the FTP server returned a positive completion code, otherwise null is returned the FTP server returned a error No files found. If the pathname corresponds to a file, only that file will be listed.

Parameters: pathname - The file or directory to list.