FTP

java.lang.Object
- com.fr.ftp.SocketClient
- - com.fr.ftp.client.FTP

直接已知子类:

FTPClient
```
public class FTP
extends SocketClient
```
FTP provides the basic the functionality necessary to implement your own FTP client. It extends com.fr.ftp.ftp.SocketClient since extending TelnetClient was causing unwanted behavior (like connections that did not time out properly).
To derive the full benefits of the FTP class requires some knowledge of the FTP protocol defined in RFC 959. However, there is no reason why you should have to use the FTP class. The FTPClient class, derived from FTP, implements all the functionality required of an FTP client. The FTP class is made public to provide access to various FTP constants and to make it easier for adventurous programmers (or those with special needs) to interact with the FTP protocol and implement their own clients. A set of methods with names corresponding to the FTP command names are provided to facilitate this interaction.
You should keep in mind that the FTP server may choose to prematurely close a connection if the client has been idle for longer than a given time period (usually 900 seconds). The FTP class will detect a premature FTP server connection closing when it receives a FTPReply.SERVICE_NOT_AVAILABLE response to a command. When that occurs, the FTP class method encountering that reply will throw an FTPConnectionClosedException . FTPConectionClosedException is a subclass of IOException and therefore need not be caught separately, but if you are going to catch it separately, its catch block must appear before the more general IOException catch block. When you encounter an FTPConnectionClosedException , you must disconnect the connection with disconnect() to properly clean up the system resources used by FTP. Before disconnecting, you may check the last reply code and text with getReplyCode , getReplyString , and getReplyStrings. You may avoid server disconnections while the client is idle by periodicaly sending NOOP commands to the server.
Rather than list it separately for each method, we mention here that every method communicating with the server and throwing an IOException can also throw a MalformedServerReplyException , which is a subclass of IOException. A MalformedServerReplyException will be thrown when the reply received from the server deviates enough from the protocol specification that it cannot be interpreted in a useful manner despite attempts to be as lenient as possible.

版本:

$Id: FTP.java 1782546 2017-02-11 00:05:41Z sebb $

另请参阅:
FTPClient, FTPConnectionClosedException, MalformedServerReplyException

字段概要

字段
限定符和类型	字段和说明
`protected ProtocolCommandSupport`	`_commandSupport_` A ProtocolCommandSupport object used to manage the registering of ProtocolCommandListeners and te firing of ProtocolCommandEvents.
`protected java.lang.String`	`_controlEncoding`
`protected java.io.BufferedReader`	`_controlInput_` Wraps SocketClient.
`protected java.io.BufferedWriter`	`_controlOutput_` Wraps SocketClient.
`protected boolean`	`_newReplyString`
`protected int`	`_replyCode`
`protected java.util.ArrayList<java.lang.String>`	`_replyLines`
`protected java.lang.String`	`_replyString`
`static int`	`ASCII_FILE_TYPE` A constant used to indicate the file(s) being transferred should be treated as ASCII.
`static int`	`BINARY_FILE_TYPE` A constant used to indicate the file(s) being transferred should be treated as a binary image, i.e., no translations should be performed.
`static int`	`BLOCK_TRANSFER_MODE` A constant used to indicate a file is to be transferred as a series of blocks.
`static int`	`CARRIAGE_CONTROL_TEXT_FORMAT` A constant used to indicate a text file contains ASA vertical format control characters.
`static int`	`COMPRESSED_TRANSFER_MODE` A constant used to indicate a file is to be transferred as FTP compressed data.
`static java.lang.String`	`DEFAULT_CONTROL_ENCODING` The default character encoding used for communicating over an FTP control connection.
`static int`	`DEFAULT_DATA_PORT` The default FTP data port (20).
`static int`	`DEFAULT_PORT` The default FTP control port (21).
`static int`	`EBCDIC_FILE_TYPE` A constant used to indicate the file(s) being transferred should be treated as EBCDIC.
`static int`	`FILE_STRUCTURE` A constant used to indicate a file is to be treated as a continuous sequence of bytes.
`static int`	`LOCAL_FILE_TYPE` A constant used to indicate the file(s) being transferred should be treated as a local type.
`static int`	`NON_PRINT_TEXT_FORMAT` A constant used for text files to indicate a non-print text format.
`static int`	`PAGE_STRUCTURE` A constant used to indicate a file is to be treated as a set of independent indexed pages.
`static int`	`RECORD_STRUCTURE` A constant used to indicate a file is to be treated as a sequence of records.
`static int`	`REPLY_CODE_LEN` Length of the FTP reply code (3 alphanumerics)
`static int`	`STREAM_TRANSFER_MODE` A constant used to indicate a file is to be transferred as a stream of bytes.
`protected boolean`	`strictMultilineParsing` This is used to signal whether a block of multiline responses beginning with xxx must be terminated by the same numeric code xxx See section 4.2 of RFC 959 for details.
`static int`	`TELNET_TEXT_FORMAT` A constant used to indicate a text file contains format vertical format control characters.

从类继承的字段 com.fr.ftp.SocketClient
_defaultPort_, _hostname_, _input_, _output_, _serverSocketFactory_, _socket_, _socketFactory_, _timeout_, connectTimeout, NETASCII_EOL

构造器概要

构造器
构造器和说明

FTP()
The default FTP constructor.

构造器
构造器和说明
`FTP()` The default FTP constructor.

方法概要

方法
限定符和类型	方法和说明
`protected void`	`__getReplyNoReport()` Get the reply, but don't pass it to command listeners.
`protected void`	`__noop()` Send a noop and get the reply without reporting to the command listener.
`protected void`	`_connectAction_()` Initiates control connections and gets initial reply.
`protected void`	`_connectAction_(java.io.Reader socketIsReader)` Initiates control connections and gets initial reply.
`int`	`abor()` A convenience method to send the FTP ABOR command to the server, receive the reply, and return the reply code.
`int`	`acct(java.lang.String account)` A convenience method to send the FTP ACCT command to the server, receive the reply, and return the reply code.
`int`	`allo(int bytes)` A convenience method to send the FTP ALLO command to the server, receive the reply, and return the reply code.
`int`	`allo(int bytes, int recordSize)` A convenience method to send the FTP ALLO command to the server, receive the reply, and return the reply code.
`int`	`appe(java.lang.String pathname)` A convenience method to send the FTP APPE command to the server, receive the reply, and return the reply code.
`int`	`cdup()` A convenience method to send the FTP CDUP command to the server, receive the reply, and return the reply code.
`int`	`cwd(java.lang.String directory)` A convenience method to send the FTP CWD command to the server, receive the reply, and return the reply code.
`int`	`dele(java.lang.String pathname)` A convenience method to send the FTP DELE command to the server, receive the reply, and return the reply code.
`void`	`disconnect()` Closes the control connection to the FTP server and sets to null some internal data so that the memory may be reclaimed by the garbage collector.
`int`	`eprt(java.net.InetAddress host, int port)` A convenience method to send the FTP EPRT command to the server, receive the reply, and return the reply code.
`int`	`epsv()` A convenience method to send the FTP EPSV command to the server, receive the reply, and return the reply code.
`int`	`feat()` A convenience method to send the FTP FEAT command to the server, receive the reply, and return the reply code.
`protected ProtocolCommandSupport`	`getCommandSupport()` Provide command support to super-class
`java.lang.String`	`getControlEncoding()`
`int`	`getReply()` Fetches a reply from the FTP server and returns the integer reply code.
`int`	`getReplyCode()` Returns the integer value of the reply code of the last FTP reply.
`java.lang.String`	`getReplyString()` Returns the entire text of the last FTP server response exactly as it was received, including all end of line markers in NETASCII format.
`java.lang.String[]`	`getReplyStrings()` Returns the lines of text from the last FTP server response as an array of strings, one entry per line.
`int`	`help()` A convenience method to send the FTP HELP command to the server, receive the reply, and return the reply code.
`int`	`help(java.lang.String command)` A convenience method to send the FTP HELP command to the server, receive the reply, and return the reply code.
`boolean`	`isStrictMultilineParsing()` Return whether strict multiline parsing is enabled, as per RFC 959, section 4.2.
`boolean`	`isStrictReplyParsing()` Return whether strict non-multiline parsing is enabled, as per RFC 959, section 4.2.
`int`	`list()` A convenience method to send the FTP LIST command to the server, receive the reply, and return the reply code.
`int`	`list(java.lang.String pathname)` A convenience method to send the FTP LIST command to the server, receive the reply, and return the reply code.
`int`	`mdtm(java.lang.String file)`
`int`	`mfmt(java.lang.String pathname, java.lang.String timeval)` A convenience method to send the FTP MFMT command to the server, receive the reply, and return the reply code.
`int`	`mkd(java.lang.String pathname)` A convenience method to send the FTP MKD command to the server, receive the reply, and return the reply code.
`int`	`mlsd()` A convenience method to send the FTP MLSD command to the server, receive the reply, and return the reply code.
`int`	`mlsd(java.lang.String path)` A convenience method to send the FTP MLSD command to the server, receive the reply, and return the reply code.
`int`	`mlst()` A convenience method to send the FTP MLST command to the server, receive the reply, and return the reply code.
`int`	`mlst(java.lang.String path)` A convenience method to send the FTP MLST command to the server, receive the reply, and return the reply code.
`int`	`mode(int mode)` A convenience method to send the FTP MODE command to the server, receive the reply, and return the reply code.
`int`	`nlst()` A convenience method to send the FTP NLST command to the server, receive the reply, and return the reply code.
`int`	`nlst(java.lang.String pathname)` A convenience method to send the FTP NLST command to the server, receive the reply, and return the reply code.
`int`	`noop()` A convenience method to send the FTP NOOP command to the server, receive the reply, and return the reply code.
`int`	`pass(java.lang.String password)` A convenience method to send the FTP PASS command to the server, receive the reply, and return the reply code.
`int`	`pasv()` A convenience method to send the FTP PASV command to the server, receive the reply, and return the reply code.
`int`	`port(java.net.InetAddress host, int port)` A convenience method to send the FTP PORT command to the server, receive the reply, and return the reply code.
`int`	`pwd()` A convenience method to send the FTP PWD command to the server, receive the reply, and return the reply code.
`int`	`quit()` A convenience method to send the FTP QUIT command to the server, receive the reply, and return the reply code.
`int`	`rein()` A convenience method to send the FTP REIN command to the server, receive the reply, and return the reply code.
`int`	`rest(java.lang.String marker)` A convenience method to send the FTP REST command to the server, receive the reply, and return the reply code.
`int`	`retr(java.lang.String pathname)` A convenience method to send the FTP RETR command to the server, receive the reply, and return the reply code.
`int`	`rmd(java.lang.String pathname)` A convenience method to send the FTP RMD command to the server, receive the reply, and return the reply code.
`int`	`rnfr(java.lang.String pathname)` A convenience method to send the FTP RNFR command to the server, receive the reply, and return the reply code.
`int`	`rnto(java.lang.String pathname)` A convenience method to send the FTP RNTO command to the server, receive the reply, and return the reply code.
`int`	`sendCommand(FTPCmd command)` Sends an FTP command to the server, waits for a reply and returns the numerical response code.
`int`	`sendCommand(FTPCmd command, java.lang.String args)` Sends an FTP command to the server, waits for a reply and returns the numerical response code.
`int`	`sendCommand(java.lang.String command)` Sends an FTP command with no arguments to the server, waits for a reply and returns the numerical response code.
`int`	`sendCommand(java.lang.String command, java.lang.String args)` Sends an FTP command to the server, waits for a reply and returns the numerical response code.
`void`	`setControlEncoding(java.lang.String encoding)` Saves the character encoding to be used by the FTP control connection.
`void`	`setStrictMultilineParsing(boolean strictMultilineParsing)` Set strict multiline parsing.
`void`	`setStrictReplyParsing(boolean strictReplyParsing)` Set strict non-multiline parsing.
`int`	`site(java.lang.String parameters)` A convenience method to send the FTP SITE command to the server, receive the reply, and return the reply code.
`int`	`smnt(java.lang.String dir)` A convenience method to send the FTP SMNT command to the server, receive the reply, and return the reply code.
`int`	`stat()` A convenience method to send the FTP STAT command to the server, receive the reply, and return the reply code.
`int`	`stat(java.lang.String pathname)` A convenience method to send the FTP STAT command to the server, receive the reply, and return the reply code.
`int`	`stor(java.lang.String pathname)` A convenience method to send the FTP STOR command to the server, receive the reply, and return the reply code.
`int`	`stou()` A convenience method to send the FTP STOU command to the server, receive the reply, and return the reply code.
`int`	`stou(java.lang.String pathname)` A convenience method to send the FTP STOU command to the server, receive the reply, and return the reply code.
`int`	`stru(int structure)` A convenience method to send the FTP STRU command to the server, receive the reply, and return the reply code.
`int`	`syst()` A convenience method to send the FTP SYST command to the server, receive the reply, and return the reply code.
`int`	`type(int fileType)` A convenience method to send the FTP TYPE command to the server, receive the reply, and return the reply code.
`int`	`type(int fileType, int formatOrByteSize)` A convenience method to send the FTP TYPE command for text files to the server, receive the reply, and return the reply code.
`int`	`user(java.lang.String username)` A convenience method to send the FTP USER command to the server, receive the reply, and return the reply code.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - DEFAULT_DATA_PORT
```
public static final int DEFAULT_DATA_PORT
```
    The default FTP data port (20).
    
    另请参阅:
    常量字段值
  - DEFAULT_PORT
```
public static final int DEFAULT_PORT
```
    The default FTP control port (21).
    
    另请参阅:
    常量字段值
  - ASCII_FILE_TYPE
```
public static final int ASCII_FILE_TYPE
```
    A constant used to indicate the file(s) being transferred should be treated as ASCII. This is the default file type. All constants ending in FILE_TYPE are used to indicate file types.
    
    另请参阅:
    常量字段值
  - EBCDIC_FILE_TYPE
```
public static final int EBCDIC_FILE_TYPE
```
    A constant used to indicate the file(s) being transferred should be treated as EBCDIC. Note however that there are several different EBCDIC formats. All constants ending in FILE_TYPE are used to indicate file types.
    
    另请参阅:
    常量字段值
  - BINARY_FILE_TYPE
```
public static final int BINARY_FILE_TYPE
```
    A constant used to indicate the file(s) being transferred should be treated as a binary image, i.e., no translations should be performed. All constants ending in FILE_TYPE are used to indicate file types.
    
    另请参阅:
    常量字段值
  - LOCAL_FILE_TYPE
```
public static final int LOCAL_FILE_TYPE
```
    A constant used to indicate the file(s) being transferred should be treated as a local type. All constants ending in FILE_TYPE are used to indicate file types.
    
    另请参阅:
    常量字段值
  - NON_PRINT_TEXT_FORMAT
```
public static final int NON_PRINT_TEXT_FORMAT
```
    A constant used for text files to indicate a non-print text format. This is the default format. All constants ending in TEXT_FORMAT are used to indicate text formatting for text transfers (both ASCII and EBCDIC).
    
    另请参阅:
    常量字段值
  - TELNET_TEXT_FORMAT
```
public static final int TELNET_TEXT_FORMAT
```
    A constant used to indicate a text file contains format vertical format control characters. All constants ending in TEXT_FORMAT are used to indicate text formatting for text transfers (both ASCII and EBCDIC).
    
    另请参阅:
    常量字段值
  - CARRIAGE_CONTROL_TEXT_FORMAT
```
public static final int CARRIAGE_CONTROL_TEXT_FORMAT
```
    A constant used to indicate a text file contains ASA vertical format control characters. All constants ending in TEXT_FORMAT are used to indicate text formatting for text transfers (both ASCII and EBCDIC).
    
    另请参阅:
    常量字段值
  - FILE_STRUCTURE
```
public static final int FILE_STRUCTURE
```
    A constant used to indicate a file is to be treated as a continuous sequence of bytes. This is the default structure. All constants ending in _STRUCTURE are used to indicate file structure for file transfers.
    
    另请参阅:
    常量字段值
  - RECORD_STRUCTURE
```
public static final int RECORD_STRUCTURE
```
    A constant used to indicate a file is to be treated as a sequence of records. All constants ending in _STRUCTURE are used to indicate file structure for file transfers.
    
    另请参阅:
    常量字段值
  - PAGE_STRUCTURE
```
public static final int PAGE_STRUCTURE
```
    A constant used to indicate a file is to be treated as a set of independent indexed pages. All constants ending in _STRUCTURE are used to indicate file structure for file transfers.
    
    另请参阅:
    常量字段值
  - STREAM_TRANSFER_MODE
```
public static final int STREAM_TRANSFER_MODE
```
    A constant used to indicate a file is to be transferred as a stream of bytes. This is the default transfer mode. All constants ending in TRANSFER_MODE are used to indicate file transfer modes.
    
    另请参阅:
    常量字段值
  - BLOCK_TRANSFER_MODE
```
public static final int BLOCK_TRANSFER_MODE
```
    A constant used to indicate a file is to be transferred as a series of blocks. All constants ending in TRANSFER_MODE are used to indicate file transfer modes.
    
    另请参阅:
    常量字段值
  - COMPRESSED_TRANSFER_MODE
```
public static final int COMPRESSED_TRANSFER_MODE
```
    A constant used to indicate a file is to be transferred as FTP compressed data. All constants ending in TRANSFER_MODE are used to indicate file transfer modes.
    
    另请参阅:
    常量字段值
  - DEFAULT_CONTROL_ENCODING
```
public static final java.lang.String DEFAULT_CONTROL_ENCODING
```
    The default character encoding used for communicating over an FTP control connection. The default encoding is an ASCII-compatible encoding. Some FTP servers expect other encodings. You can change the encoding used by an FTP instance with setControlEncoding.
    
    另请参阅:
    常量字段值
  - REPLY_CODE_LEN
```
public static final int REPLY_CODE_LEN
```
    Length of the FTP reply code (3 alphanumerics)
    
    另请参阅:
    常量字段值
  - _replyCode
```
protected int _replyCode
```
  - _replyLines
```
protected java.util.ArrayList<java.lang.String> _replyLines
```
  - _newReplyString
```
protected boolean _newReplyString
```
  - _replyString
```
protected java.lang.String _replyString
```
  - _controlEncoding
```
protected java.lang.String _controlEncoding
```
  - _commandSupport_
```
protected ProtocolCommandSupport _commandSupport_
```
    A ProtocolCommandSupport object used to manage the registering of ProtocolCommandListeners and te firing of ProtocolCommandEvents.
  - strictMultilineParsing
```
protected boolean strictMultilineParsing
```
    This is used to signal whether a block of multiline responses beginning with xxx must be terminated by the same numeric code xxx See section 4.2 of RFC 959 for details.
  - _controlInput_
```
protected java.io.BufferedReader _controlInput_
```
    Wraps SocketClient._input_ to facilitate the reading of text from the FTP control connection. Do not access the control connection via SocketClient._input_. This member starts with a null value, is initialized in _connectAction_(), and set to null in disconnect().
  - _controlOutput_
```
protected java.io.BufferedWriter _controlOutput_
```
    Wraps SocketClient._output_ to facilitate the writing of text to the FTP control connection. Do not access the control connection via SocketClient._output_. This member starts with a null value, is initialized in _connectAction_(), and set to null in disconnect().
- 构造器详细资料
  - FTP
```
public FTP()
```
    The default FTP constructor. Sets the default port to DEFAULT_PORT and initializes internal data structures for saving FTP reply information.
- 方法详细资料
  - __getReplyNoReport
```
protected void __getReplyNoReport()
                           throws java.io.IOException
```
    Get the reply, but don't pass it to command listeners. Used for keep-alive processing only.
    
    抛出:
    
    java.io.IOException - on error
    从以下版本开始:
    
    3.0
  - _connectAction_
```
protected void _connectAction_()
                        throws java.io.IOException
```
    Initiates control connections and gets initial reply. Initializes _controlInput_ and _controlOutput_.
    
    覆盖:
    
    _connectAction_ 在类中 SocketClient
    
    抛出:
    
    java.io.IOException - (SocketException) if a problem occurs with the socket
  - _connectAction_
```
protected void _connectAction_(java.io.Reader socketIsReader)
                        throws java.io.IOException
```
    Initiates control connections and gets initial reply. Initializes _controlInput_ and _controlOutput_.
    
    参数:
    socketIsReader - the reader to reuse (if non-null)
    
    抛出:
    
    java.io.IOException - on error
    从以下版本开始:
    
    3.4
  - setControlEncoding
```
public void setControlEncoding(java.lang.String encoding)
```
    Saves the character encoding to be used by the FTP control connection. Some FTP servers require that commands be issued in a non-ASCII encoding like UTF-8 so that filenames with multi-byte character representations (e.g, Big 8) can be specified.
    Please note that this has to be set before the connection is established.
    
    参数:
    encoding - The new character encoding for the control connection.
  - getControlEncoding
```
public java.lang.String getControlEncoding()
```
    返回:
    The character encoding used to communicate over the control connection.
  - disconnect
```
public void disconnect()
                throws java.io.IOException
```
    Closes the control connection to the FTP server and sets to null some internal data so that the memory may be reclaimed by the garbage collector. The reply text and code information from the last command is voided so that the memory it used may be reclaimed. Also sets _controlInput_ and _controlOutput_ to null.
    
    覆盖:
    
    disconnect 在类中 SocketClient
    
    抛出:
    
    java.io.IOException - If an error occurs while disconnecting.
  - sendCommand
```
public int sendCommand(java.lang.String command,
              java.lang.String args)
                throws java.io.IOException
```
    Sends an FTP command to the server, waits for a reply and returns the numerical response code. After invocation, for more detailed information, the actual reply text can be accessed by calling getReplyString or getReplyStrings .
    
    参数:
    command - The text representation of the FTP command to send.
    args - The arguments to the FTP command. If this parameter is set to null, then the command is sent with no argument.
    
    返回:
    The integer value of the FTP reply code returned by the server in response to the command.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - __noop
```
protected void __noop()
               throws java.io.IOException
```
    Send a noop and get the reply without reporting to the command listener. Intended for use with keep-alive.
    
    抛出:
    
    java.io.IOException - on error
    从以下版本开始:
    
    3.0
  - sendCommand
```
public int sendCommand(FTPCmd command)
                throws java.io.IOException
```
    Sends an FTP command to the server, waits for a reply and returns the numerical response code. After invocation, for more detailed information, the actual reply text can be accessed by calling getReplyString or getReplyStrings .
    
    参数:
    command - The FTPCmd enum corresponding to the FTP command to send.
    
    返回:
    The integer value of the FTP reply code returned by the server in response to the command.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
    从以下版本开始:
    
    3.3
  - sendCommand
```
public int sendCommand(FTPCmd command,
              java.lang.String args)
                throws java.io.IOException
```
    Sends an FTP command to the server, waits for a reply and returns the numerical response code. After invocation, for more detailed information, the actual reply text can be accessed by calling getReplyString or getReplyStrings .
    
    参数:
    command - The FTPCmd enum corresponding to the FTP command to send.
    args - The arguments to the FTP command. If this parameter is set to null, then the command is sent with no argument.
    
    返回:
    The integer value of the FTP reply code returned by the server in response to the command.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
    从以下版本开始:
    
    3.3
  - sendCommand
```
public int sendCommand(java.lang.String command)
                throws java.io.IOException
```
    Sends an FTP command with no arguments to the server, waits for a reply and returns the numerical response code. After invocation, for more detailed information, the actual reply text can be accessed by calling getReplyString or getReplyStrings .
    
    参数:
    command - The text representation of the FTP command to send.
    
    返回:
    The integer value of the FTP reply code returned by the server in response to the command.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - getReplyCode
```
public int getReplyCode()
```
    Returns the integer value of the reply code of the last FTP reply. You will usually only use this method after you connect to the FTP server to check that the connection was successful since connect is of type void.
    
    返回:
    The integer value of the reply code of the last FTP reply.
  - getReply
```
public int getReply()
             throws java.io.IOException
```
    Fetches a reply from the FTP server and returns the integer reply code. After calling this method, the actual reply text can be accessed from either calling getReplyString or getReplyStrings . Only use this method if you are implementing your own FTP client or if you need to fetch a secondary response from the FTP server.
    
    返回:
    The integer value of the reply code of the fetched FTP reply.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while receiving the server reply.
  - getReplyStrings
```
public java.lang.String[] getReplyStrings()
```
    Returns the lines of text from the last FTP server response as an array of strings, one entry per line. The end of line markers of each are stripped from each line.
    
    返回:
    The lines of text from the last FTP response as an array.
  - getReplyString
```
public java.lang.String getReplyString()
```
    Returns the entire text of the last FTP server response exactly as it was received, including all end of line markers in NETASCII format.
    
    返回:
    The entire text from the last FTP response as a String.
  - user
```
public int user(java.lang.String username)
         throws java.io.IOException
```
    A convenience method to send the FTP USER command to the server, receive the reply, and return the reply code.
    
    参数:
    username - The username to login under.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - pass
```
public int pass(java.lang.String password)
         throws java.io.IOException
```
    A convenience method to send the FTP PASS command to the server, receive the reply, and return the reply code.
    
    参数:
    password - The plain text password of the username being logged into.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - acct
```
public int acct(java.lang.String account)
         throws java.io.IOException
```
    A convenience method to send the FTP ACCT command to the server, receive the reply, and return the reply code.
    
    参数:
    account - The account name to access.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - abor
```
public int abor()
         throws java.io.IOException
```
    A convenience method to send the FTP ABOR command to the server, receive the reply, and return the reply code.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - cwd
```
public int cwd(java.lang.String directory)
        throws java.io.IOException
```
    A convenience method to send the FTP CWD command to the server, receive the reply, and return the reply code.
    
    参数:
    directory - The new working directory.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - cdup
```
public int cdup()
         throws java.io.IOException
```
    A convenience method to send the FTP CDUP command to the server, receive the reply, and return the reply code.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - quit
```
public int quit()
         throws java.io.IOException
```
    A convenience method to send the FTP QUIT command to the server, receive the reply, and return the reply code.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - rein
```
public int rein()
         throws java.io.IOException
```
    A convenience method to send the FTP REIN command to the server, receive the reply, and return the reply code.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - smnt
```
public int smnt(java.lang.String dir)
         throws java.io.IOException
```
    A convenience method to send the FTP SMNT command to the server, receive the reply, and return the reply code.
    
    参数:
    dir - The directory name.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - port
```
public int port(java.net.InetAddress host,
       int port)
         throws java.io.IOException
```
    A convenience method to send the FTP PORT command to the server, receive the reply, and return the reply code.
    
    参数:
    host - The host owning the port.
    port - The new port.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - eprt
```
public int eprt(java.net.InetAddress host,
       int port)
         throws java.io.IOException
```
    A convenience method to send the FTP EPRT command to the server, receive the reply, and return the reply code. Examples:
    - EPRT |1|132.235.1.2|6275|
    - EPRT |2|1080::8:800:200C:417A|5282|
    参数:
    host - The host owning the port.
    port - The new port.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
    从以下版本开始:
    
    2.2
    
    另请参阅:
    "http://www.faqs.org/rfcs/rfc2428.html"
  - pasv
```
public int pasv()
         throws java.io.IOException
```
    A convenience method to send the FTP PASV command to the server, receive the reply, and return the reply code. Remember, it's up to you to interpret the reply string containing the host/port information.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - epsv
```
public int epsv()
         throws java.io.IOException
```
    A convenience method to send the FTP EPSV command to the server, receive the reply, and return the reply code. Remember, it's up to you to interpret the reply string containing the host/port information.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
    从以下版本开始:
    
    2.2
  - type
```
public int type(int fileType,
       int formatOrByteSize)
         throws java.io.IOException
```
    A convenience method to send the FTP TYPE command for text files to the server, receive the reply, and return the reply code.
    
    参数:
    fileType - The type of the file (one of the FILE_TYPE constants).
    formatOrByteSize - The format of the file (one of the _FORMAT constants. In the case of LOCAL_FILE_TYPE, the byte size.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - type
```
public int type(int fileType)
         throws java.io.IOException
```
    A convenience method to send the FTP TYPE command to the server, receive the reply, and return the reply code.
    
    参数:
    fileType - The type of the file (one of the FILE_TYPE constants).
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - stru
```
public int stru(int structure)
         throws java.io.IOException
```
    A convenience method to send the FTP STRU command to the server, receive the reply, and return the reply code.
    
    参数:
    structure - The structure of the file (one of the _STRUCTURE constants).
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - mode
```
public int mode(int mode)
         throws java.io.IOException
```
    A convenience method to send the FTP MODE command to the server, receive the reply, and return the reply code.
    
    参数:
    mode - The transfer mode to use (one of the TRANSFER_MODE constants).
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - retr
```
public int retr(java.lang.String pathname)
         throws java.io.IOException
```
    A convenience method to send the FTP RETR command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    参数:
    pathname - The pathname of the file to retrieve.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - stor
```
public int stor(java.lang.String pathname)
         throws java.io.IOException
```
    A convenience method to send the FTP STOR command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    参数:
    pathname - The pathname to use for the file when stored at the remote end of the transfer.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - stou
```
public int stou()
         throws java.io.IOException
```
    A convenience method to send the FTP STOU command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - stou
```
public int stou(java.lang.String pathname)
         throws java.io.IOException
```
    A convenience method to send the FTP STOU command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    参数:
    pathname - The base pathname to use for the file when stored at the remote end of the transfer. Some FTP servers require this.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - appe
```
public int appe(java.lang.String pathname)
         throws java.io.IOException
```
    A convenience method to send the FTP APPE command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    参数:
    pathname - The pathname to use for the file when stored at the remote end of the transfer.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - allo
```
public int allo(int bytes)
         throws java.io.IOException
```
    A convenience method to send the FTP ALLO command to the server, receive the reply, and return the reply code.
    
    参数:
    bytes - The number of bytes to allocate.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - feat
```
public int feat()
         throws java.io.IOException
```
    A convenience method to send the FTP FEAT command to the server, receive the reply, and return the reply code.
    
    返回:
    The reply code received by the server
    
    抛出:
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
    从以下版本开始:
    
    2.2
  - allo
```
public int allo(int bytes,
       int recordSize)
         throws java.io.IOException
```
    A convenience method to send the FTP ALLO command to the server, receive the reply, and return the reply code.
    
    参数:
    bytes - The number of bytes to allocate.
    recordSize - The size of a record.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - rest
```
public int rest(java.lang.String marker)
         throws java.io.IOException
```
    A convenience method to send the FTP REST command to the server, receive the reply, and return the reply code.
    
    参数:
    marker - The marker at which to restart a transfer.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - mdtm
```
public int mdtm(java.lang.String file)
         throws java.io.IOException
```
    参数:
    file - name of file
    
    返回:
    the status
    
    抛出:
    
    java.io.IOException - on error
    从以下版本开始:
    
    2.0
  - mfmt
```
public int mfmt(java.lang.String pathname,
       java.lang.String timeval)
         throws java.io.IOException
```
    A convenience method to send the FTP MFMT command to the server, receive the reply, and return the reply code.
    
    参数:
    pathname - The pathname for which mtime is to be changed
    timeval - Timestamp in YYYYMMDDhhmmss format
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
    从以下版本开始:
    
    2.2
    
    另请参阅:
    http://tools.ietf.org/html/draft-somers-ftp-mfxx-04
  - rnfr
```
public int rnfr(java.lang.String pathname)
         throws java.io.IOException
```
    A convenience method to send the FTP RNFR command to the server, receive the reply, and return the reply code.
    
    参数:
    pathname - The pathname to rename from.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - rnto
```
public int rnto(java.lang.String pathname)
         throws java.io.IOException
```
    A convenience method to send the FTP RNTO command to the server, receive the reply, and return the reply code.
    
    参数:
    pathname - The pathname to rename to
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - dele
```
public int dele(java.lang.String pathname)
         throws java.io.IOException
```
    A convenience method to send the FTP DELE command to the server, receive the reply, and return the reply code.
    
    参数:
    pathname - The pathname to delete.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - rmd
```
public int rmd(java.lang.String pathname)
        throws java.io.IOException
```
    A convenience method to send the FTP RMD command to the server, receive the reply, and return the reply code.
    
    参数:
    pathname - The pathname of the directory to remove.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - mkd
```
public int mkd(java.lang.String pathname)
        throws java.io.IOException
```
    A convenience method to send the FTP MKD command to the server, receive the reply, and return the reply code.
    
    参数:
    pathname - The pathname of the new directory to create.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - pwd
```
public int pwd()
        throws java.io.IOException
```
    A convenience method to send the FTP PWD command to the server, receive the reply, and return the reply code.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - list
```
public int list()
         throws java.io.IOException
```
    A convenience method to send the FTP LIST command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - list
```
public int list(java.lang.String pathname)
         throws java.io.IOException
```
    A convenience method to send the FTP LIST command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    参数:
    pathname - The pathname to list, may be null in which case the command is sent with no parameters
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - mlsd
```
public int mlsd()
         throws java.io.IOException
```
    A convenience method to send the FTP MLSD command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
    从以下版本开始:
    
    3.0
  - mlsd
```
public int mlsd(java.lang.String path)
         throws java.io.IOException
```
    A convenience method to send the FTP MLSD command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    参数:
    path - the path to report on
    
    返回:
    The reply code received from the server, may be null in which case the command is sent with no parameters
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
    从以下版本开始:
    
    3.0
  - mlst
```
public int mlst()
         throws java.io.IOException
```
    A convenience method to send the FTP MLST command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
    从以下版本开始:
    
    3.0
  - mlst
```
public int mlst(java.lang.String path)
         throws java.io.IOException
```
    A convenience method to send the FTP MLST command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    参数:
    path - the path to report on
    
    返回:
    The reply code received from the server, may be null in which case the command is sent with no parameters
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
    从以下版本开始:
    
    3.0
  - nlst
```
public int nlst()
         throws java.io.IOException
```
    A convenience method to send the FTP NLST command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - nlst
```
public int nlst(java.lang.String pathname)
         throws java.io.IOException
```
    A convenience method to send the FTP NLST command to the server, receive the reply, and return the reply code. Remember, it is up to you to manage the data connection. If you don't need this low level of access, use FTPClient , which will handle all low level details for you.
    
    参数:
    pathname - The pathname to list, may be null in which case the command is sent with no parameters
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - site
```
public int site(java.lang.String parameters)
         throws java.io.IOException
```
    A convenience method to send the FTP SITE command to the server, receive the reply, and return the reply code.
    
    参数:
    parameters - The site parameters to send.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - syst
```
public int syst()
         throws java.io.IOException
```
    A convenience method to send the FTP SYST command to the server, receive the reply, and return the reply code.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - stat
```
public int stat()
         throws java.io.IOException
```
    A convenience method to send the FTP STAT command to the server, receive the reply, and return the reply code.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - stat
```
public int stat(java.lang.String pathname)
         throws java.io.IOException
```
    A convenience method to send the FTP STAT command to the server, receive the reply, and return the reply code.
    
    参数:
    pathname - A pathname to list.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - help
```
public int help()
         throws java.io.IOException
```
    A convenience method to send the FTP HELP command to the server, receive the reply, and return the reply code.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - help
```
public int help(java.lang.String command)
         throws java.io.IOException
```
    A convenience method to send the FTP HELP command to the server, receive the reply, and return the reply code.
    
    参数:
    command - The command name on which to request help.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - noop
```
public int noop()
         throws java.io.IOException
```
    A convenience method to send the FTP NOOP command to the server, receive the reply, and return the reply code.
    
    返回:
    The reply code received from the server.
    
    抛出:
    
    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 421. This exception may be caught either as an IOException or independently as itself.
    
    java.io.IOException - If an I/O error occurs while either sending the command or receiving the server reply.
  - isStrictMultilineParsing
```
public boolean isStrictMultilineParsing()
```
    Return whether strict multiline parsing is enabled, as per RFC 959, section 4.2.
    
    返回:
    True if strict, false if lenient
    从以下版本开始:
    
    2.0
  - setStrictMultilineParsing
```
public void setStrictMultilineParsing(boolean strictMultilineParsing)
```
    Set strict multiline parsing.
    
    参数:
    strictMultilineParsing - the setting
    从以下版本开始:
    
    2.0
  - isStrictReplyParsing
```
public boolean isStrictReplyParsing()
```
    Return whether strict non-multiline parsing is enabled, as per RFC 959, section 4.2.
    The default is true, which requires the 3 digit code be followed by space and some text.
    If false, only the 3 digit code is required (as was the case for versions up to 3.5)
    
    返回:
    True if strict (default), false if additional checks are not made
    从以下版本开始:
    
    3.6
  - setStrictReplyParsing
```
public void setStrictReplyParsing(boolean strictReplyParsing)
```
    Set strict non-multiline parsing.
    If true, it requires the 3 digit code be followed by space and some text.
    If false, only the 3 digit code is required (as was the case for versions up to 3.5)
    This should not be required by a well-behaved FTP server
    
    参数:
    strictReplyParsing - the setting
    从以下版本开始:
    
    3.6
  - getCommandSupport
```
protected ProtocolCommandSupport getCommandSupport()
```
    Provide command support to super-class
    
    覆盖:
    
    getCommandSupport 在类中 SocketClient
    
    返回:
    the CommandSupport instance, may be null

类 FTP

字段概要

从类继承的字段 com.fr.ftp.SocketClient

构造器概要

方法概要

从类继承的方法 com.fr.ftp.SocketClient

从类继承的方法 java.lang.Object

字段详细资料

DEFAULT_DATA_PORT

DEFAULT_PORT

ASCII_FILE_TYPE

EBCDIC_FILE_TYPE

BINARY_FILE_TYPE

LOCAL_FILE_TYPE

NON_PRINT_TEXT_FORMAT

TELNET_TEXT_FORMAT

CARRIAGE_CONTROL_TEXT_FORMAT

FILE_STRUCTURE

RECORD_STRUCTURE

PAGE_STRUCTURE

STREAM_TRANSFER_MODE

BLOCK_TRANSFER_MODE

COMPRESSED_TRANSFER_MODE

DEFAULT_CONTROL_ENCODING

REPLY_CODE_LEN

_replyCode

_replyLines

_newReplyString

_replyString

_controlEncoding

_commandSupport_

strictMultilineParsing

_controlInput_

_controlOutput_

构造器详细资料

FTP

方法详细资料

__getReplyNoReport

_connectAction_

_connectAction_

setControlEncoding

getControlEncoding

disconnect

sendCommand

__noop

sendCommand

sendCommand

sendCommand

getReplyCode

getReply

getReplyStrings

getReplyString

user

pass

acct

abor

cwd

cdup

quit

rein

smnt

port

eprt

pasv

epsv

type

type

stru

mode

retr

stor

stou

stou

appe

allo

feat

allo

rest

mdtm

mfmt