資源簡介
Java實現與FTP服務器的數據傳輸。
其中包含了兩種實現方法。詳情請參見本人博客：
http://blog.csdn.net/lemon_tree12138/article/details/49777467
代碼片段和文件信息
package?com.ftp.sockettran;
import?org.ftp.transmission.config.Config;
import?org.ftp.transmission.tools.Tools;
import?java.io.*;
import?java.net.Socket;
import?java.util.StringTokenizer;
/**
?*?基于Socket的FTP數據傳輸測試
?*?Created?by?Naga?on?2015/11/11.
?*/
public?class?FtpSocketClient?{
????Socket?mFtpClient?=?null;
????BufferedReader?mReader?=?null;
????BufferedWriter?mWriter?=?null;
????/**
?????*?連接FTP服務器
?????*/
????public?void?connectFtp（）?{
????????try?{
????????????mFtpClient?=?new?Socket（Config.FTP.HOST_IP?Config.FTP.HOST_PORT）;
????????????mReader?=?new?BufferedReader（new?InputStreamReader（mFtpClient.getInputStream（）））;
????????????mWriter?=?new?BufferedWriter（new?OutputStreamWriter（mFtpClient.getOutputStream（）））;
????????????sendCommand（“USER?“?+?Config.FTP.FTP_USERNAME）;
????????????sendCommand（“PASS?“?+?Config.FTP.FTP_PASSWD）;
????????}?catch?（IOException?e）?{
????????????e.printStackTrace（）;
????????}
????}
????/**
?????*?關閉FTP的Socket連接
?????*/
????public?void?disconnectFtp（）?{
????????if?（mFtpClient?==?null）?{
????????????return;
????????}
????????if?（!mFtpClient.isConnected（））?{
????????????return;
????????}
????????try?{
????????????mFtpClient.close（）;
????????}?catch?（IOException?e）?{
????????????e.printStackTrace（）;
????????}
????}
????/**
?????*?獲得Socket的連接狀態
?????*?@param?socket
?????*??????????待檢查的socket
?????*?@return
?????*/
????private?boolean?socketStatus（Socket?socket）?{
????????if?（socket?==?null?||?!socket.isConnected（））?{
????????????return?false;
????????}
????????return?true;
????}
????/**
?????*?向FTP服務器發送命令
?????*?@param?command
?????*??????????FTP命令
?????*?@throws?IOException
?????*/
????private?void?sendCommand（String?command）?throws?IOException?{
????????if?（Tools.StringTools.isEmpty（command））?{
????????????return;
????????}
????????if?（mFtpClient?==?null）?{
????????????return;
????????}
????????mWriter.write（command?+?“\r\n“）;
????????mWriter.flush（）;
????}
????/**
?????*?下載文件
?????*?@param?localPath
?????*??????????本地文件路徑
?????*?@param?ftpPath
?????*??????????服務器文件路徑
?????*?@throws?IOException
?????*/
????public?void?downloadFile（String?localPath?String?ftpPath）?throws?IOException?{
????????//?進入被動模式
????????sendCommand（“PASV“）;
????????//?獲得ip和端口
????????String?response?=?readNewMessage（）;
????????String[]?ipPort?=?getIPPort（response）;
????????String?ip?=?ipPort[0];
????????int?port?=?Integer.parseInt（ipPort[1]）;
????????//?建立數據端口的連接
????????Socket?dataSocket?=?new?Socket（ip?port）;
????????sendCommand（“RETR?“?+?ftpPath）;
????????//?下載文件前的準備
????????File?localFile?=?new?File（localPath）;
????????InputStream?inputStream?=?dataSocket.getInputStream（）;
????????FileOutputStream?fileOutputStream?=?new?FileOutputStream（localFile）;
????????//?下載文件
????????int?offset;
????????byte[]?bytes?=?new?byte[1024];
????????while?（（offset?=?inputStream.read（bytes））?!=?-1）?{
????????????fileOutputSt?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\.idea\
?????文件??????????17??2015-11-11?00:21??TransmissionOnFTP\.idea\.name
?????文件?????????686??2015-11-11?00:21??TransmissionOnFTP\.idea\compiler.xm
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\.idea\copyright\
?????文件??????????76??2015-11-11?00:21??TransmissionOnFTP\.idea\copyright\profiles_settings.xm
?????文件?????????660??2015-11-11?13:49??TransmissionOnFTP\.idea\encodings.xm
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\.idea\libraries\
?????文件?????????229??2015-11-11?00:55??TransmissionOnFTP\.idea\libraries\commons_net_2_2.xm
?????文件?????????873??2015-11-11?19:06??TransmissionOnFTP\.idea\misc.xm
?????文件?????????274??2015-11-11?00:21??TransmissionOnFTP\.idea\modules.xm
?????文件????????8792??2015-11-11?00:24??TransmissionOnFTP\.idea\uiDesigner.xm
?????文件???????52533??2015-11-12?16:48??TransmissionOnFTP\.idea\workspace.xm
?????目錄???????????0??2015-11-12?16:49??TransmissionOnFTP\data\
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\libs\
?????文件??????212453??2010-11-17?00:53??TransmissionOnFTP\libs\commons-net-2.2.jar
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\out\
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\out\production\
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\out\production\TransmissionOnFTP\
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\out\production\TransmissionOnFTP\com\
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\out\production\TransmissionOnFTP\com\ftp\
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\out\production\TransmissionOnFTP\com\ftp\sockettran\
?????文件????????6707??2015-11-11?10:47??TransmissionOnFTP\out\production\TransmissionOnFTP\com\ftp\sockettran\Client.class
?????文件????????6634??2015-11-11?11:09??TransmissionOnFTP\out\production\TransmissionOnFTP\com\ftp\sockettran\FTPRead.class
?????文件????????6116??2015-11-12?16:36??TransmissionOnFTP\out\production\TransmissionOnFTP\com\ftp\sockettran\FtpSocketClient.class
?????文件????????6119??2015-11-11?10:47??TransmissionOnFTP\out\production\TransmissionOnFTP\com\ftp\sockettran\Server.class
?????文件????????3718??2015-11-11?12:52??TransmissionOnFTP\out\production\TransmissionOnFTP\com\ftp\sockettran\UpdateReceiver$DownloadThread.class
?????文件????????2533??2015-11-11?12:52??TransmissionOnFTP\out\production\TransmissionOnFTP\com\ftp\sockettran\UpdateReceiver.class
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\out\production\TransmissionOnFTP\org\
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\out\production\TransmissionOnFTP\org\ftp\
?????目錄???????????0??2015-11-12?16:48??TransmissionOnFTP\out\production\TransmissionOnFTP\org\ftp\transmission\
............此處省略25個文件信息
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