apache ftpClient 多网卡上传文件超时解决。

             在服务器中有多个网卡，默认的路由不是当前的ftp服务器走的路由。

             修改ftpclinent.java 中的代码实现。

            

protected Socket _openDataConnection_(String command, String arg) throws IOException {if (__dataConnectionMode != ACTIVE_LOCAL_DATA_CONNECTION_MODE&& __dataConnectionMode != PASSIVE_LOCAL_DATA_CONNECTION_MODE) {return null;}final boolean isInet6Address = getRemoteAddress() instanceof Inet6Address;Socket socket;if (__dataConnectionMode == ACTIVE_LOCAL_DATA_CONNECTION_MODE) {// if no activePortRange was set (correctly) -> getActivePort() = 0// -> new ServerSocket(0) -> bind to any free local portServerSocket server = _serverSocketFactory_.createServerSocket(getActivePort(), 1, getHostAddress());try {// Try EPRT only if remote server is over IPv6, if not use PORT,// because EPRT has no advantage over PORT on IPv4.// It could even have the disadvantage,// that EPRT will make the data connection fail, because// today's intelligent NAT Firewalls are able to// substitute IP addresses in the PORT command,// but might not be able to recognize the EPRT command.if (isInet6Address) {if (!FTPReply.isPositiveCompletion(eprt(getReportHostAddress(), server.getLocalPort()))) {return null;}} else {if (!FTPReply.isPositiveCompletion(port(getReportHostAddress(), server.getLocalPort()))) {return null;}}if ((__restartOffset > 0) && !restart(__restartOffset)) {return null;}if (!FTPReply.isPositivePreliminary(sendCommand(command, arg))) {return null;}// For now, let's just use the data timeout value for waiting for// the data connection.  It may be desirable to let this be a// separately configurable value.  In any case, we really want// to allow preventing the accept from blocking indefinitely.if (__dataTimeout >= 0) {server.setSoTimeout(__dataTimeout);}socket = server.accept();} finally {server.close();}} else { // We must be in PASSIVE_LOCAL_DATA_CONNECTION_MODE// Try EPSV command first on IPv6 - and IPv4 if enabled.// When using IPv4 with NAT it has the advantage// to work with more rare configurations.// E.g. if FTP server has a static PASV address (external network)// and the client is coming from another internal network.// In that case the data connection after PASV command would fail,// while EPSV would make the client succeed by taking just the port.boolean attemptEPSV = isUseEPSVwithIPv4() || isInet6Address;if (attemptEPSV && epsv() == FTPReply.ENTERING_EPSV_MODE) {_parseExtendedPassiveModeReply(_replyLines.get(0));} else {if (isInet6Address) {return null; // Must use EPSV for IPV6}// If EPSV failed on IPV4, revert to PASVif (pasv() != FTPReply.ENTERING_PASSIVE_MODE) {return null;}_parsePassiveModeReply(_replyLines.get(0));}socket = _socketFactory_.createSocket();// 新增加bind 源地址操作。if (localAddr != null) {System.out.println(">>>>>>>>>>>>>>>>>>FTPClient localAddr"+localAddr); socket.bind(new InetSocketAddress(localAddr, localPort));}socket.connect(new InetSocketAddress(__passiveHost, __passivePort), connectTimeout);if ((__restartOffset > 0) && !restart(__restartOffset)) {socket.close();return null;}if (!FTPReply.isPositivePreliminary(sendCommand(command, arg))) {socket.close();return null;}}if (__remoteVerificationEnabled && !verifyRemote(socket)) {socket.close();throw new IOException("Host attempting data connection " + socket.getInetAddress().getHostAddress()+ " is not same as server " + getRemoteAddress().getHostAddress());}if (__dataTimeout >= 0) {socket.setSoTimeout(__dataTimeout);}return socket;}