Looking for:
Apache commons ftpclient download file |
How to download file from FTP using Java? - Stack Overflow - Class FTPClient
Null is returned if an FTP protocol error is reported at any point during the establishment and initialization of the connection. Parameters: command - The text representation of the FTP command to send. Returns: True if successfully completed, false if not. This exception may be caught either as an IOException or independently as itself. Parameters: bytes - The number of bytes which the server should allocate.
Parameters: remote - The name of the remote file. The CopyStreamException allows you to determine the number of bytes transferred and the IOException causing the error. You must close the OutputStream when you finish writing to it. The OutputStream itself will take care of closing the parent data connection socket upon being closed. To finalize the file transfer you must call completePendingCommand and check its return value to verify success.
If this is not done, subsequent commands may behave unexpectedly. Returns: An OutputStream through which the remote file can be appended. If the data connection cannot be opened e. Parameters: pathname - The new current working directory. These commands require some action by the programmer after the reception of a positive intermediate command.
After the programmer's code completes its actions, it must call this method to receive the completion reply from the server and verify the success of the entire transaction. In the case of this class, configuring merely makes the config object available for the factory methods that construct parsers.
Specified by: configure in interface Configurable Parameters: config - FTPClientConfig object used to provide non-standard configurations to the parser. Since: 1. Parameters: pathname - The pathname of the file to be deleted. Parameters: command - The command to invoke params - The parameters string, may be null Returns: True if successfully completed, false if not, in which case call FTP. Parameters: command - The command to invoke params - The parameters string, may be null Returns: The array of replies, or null if the command failed, in which case call FTP.
No communication with the FTP server is conducted, but this causes all future data transfers to require the FTP server to connect to the client's data port. Additionally, to accommodate differences between socket implementations on different platforms, this method causes the client to issue a PORT command before every data transfer.
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. Gets how long to wait for control keep-alive message replies. Returns: wait time in milliseconds. Returns: wait time. Gets the time to wait between sending control connection keepalive messages when processing file upload or download. See the class Javadoc section "Control channel keep-alive feature".
Note: the timeout will also be applied when calling accept whilst establishing an active local data connection. 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. Until 3. Beginning with 3. Returns: True, if the IP address from the server's response will be used pre 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. Warning: the server may treat a leading '-' as an option introducer. If so, try using an absolute path, or prefix the path with.
Returns: The list of file names contained in the given path. Parameters: username - The username to login under. If no account is required by the server, only the username and password, the account information is not used. Parameters: pathname - The pathname of the directory to create. Parameters: pathname - The file path to query. Returns: A Calendar representing the last file modification time, may be null. The Calendar timestamp will be null if a parse error occurs. The FTPFile timestamp will be null if a parse error occurs.
Returns: An Instant representing the last file modification time, may be null. The Instant timestamp will be null if a parse error occurs. Parameters: pathname - the directory name, may be null Returns: the array of file entries Throws: IOException - on error Since: 3.
Parameters: pathname - the directory name, may be null filter - the filter to apply to the responses Returns: the array of file entries Throws: IOException - on error Since: 3. Returns: The pathname of the current working directory. FTPReply; import static org. File ;. FileInputStream ;. FileOutputStream ;. IOException ;. InputStream ;. PrintWriter ;. PrintCommandListener ;. FTP ;. FTPClient ;. FTPFile ;. FTPReply ;. Top Best Software Testing Trends to watch out in Share this:. About The Author.
A Quality Engineer with an enthusiasm towards technical and non-technical writing. When i am not glued to my system, i could be found reading novels, writing poems, enjoying with friends. Contact Me : shruti. Leave a Reply Cancel reply. Loading Comments Email Required Name Required Website. Here is an example that downloads files from a specific directory on the FTP server and then delete them. Please download the jar file from the Apache commons Website given below and add to your project Java build path.
FileInputStream; import java. FileOutputStream; import java. OutputStream; import java.
No comments:
Post a Comment