[Java] uses Apache's commons-net library for FTP operations

Because the FTP operation is needed in the recent work, and there is no existing FTP code on hand. Went online to find a bit, found that everyone using Apache Commons-net Library in the ftpclient.

However, the feeling is not very convenient to use. And found a lot of packages on the Internet. I think it's not very useful. So I wrote one of my own. Most of the examples on the web are directly manipulating files, and what I need more is to read the memory or write it from memory. And there are a lot of practical singleton patterns, but I think if the call is more, there may be problems.

1 /**2 * Some FTP operations are encapsulated3  */4 ImportJava.io.BufferedReader;5 ImportJava.io.FileOutputStream;6 Importjava.io.IOException;7 ImportJava.io.InputStreamReader;8 ImportJava.io.OutputStream;9 ImportJava.io.OutputStreamWriter;Ten  One ImportOrg.apache.commons.net.ftp.FTP; A Importorg.apache.commons.net.ftp.FTPClient; - ImportORG.APACHE.COMMONS.NET.FTP.FTPCMD; - Importorg.apache.commons.net.ftp.FTPReply; the ImportOrg.apache.log4j.Logger; -  -  Public classFtputil { -     Private StaticLogger Logger = Logger.getlogger (ftputil.class); +  -     Private Staticftpclient getconnection () { +FtpClient client =Newftpclient (); AClient.setdatatimeout (30000); atClient.setdefaulttimeout (30000); -         returnclient; -     } -  -      Public StaticFtpClient getconnection (String host)throwsIOException { -FtpClient client =getconnection (); in Client.connect (host); -         if(!ftpreply.ispositivecompletion (Client.getreplycode ())) { to             Throw NewIOException ("Connect Error"); +         } -         returnclient; the     } *      Public StaticFtpClient getconnection (String host,intPortthrowsIOException { $FtpClient client =getconnection ();Panax Notoginseng Client.connect (host, port); -         if(!ftpreply.ispositivecompletion (Client.getreplycode ())) { the             Throw NewIOException ("Connect Error"); +         } A         returnclient; the     } +  -     StaticFtpClient getconnection (string host, string username, string password)throwsIOException { $FtpClient client=getconnection (host); $ client.login (username, password); -         if(!ftpreply.ispositivecompletion (Client.getreplycode ())) { -             Throw NewIOException ("Login Error"); the         } -         returnclient;Wuyi     } the  -     StaticFtpClient getconnection (String host,intport, string Username, string password) Wu             throwsIOException { -FtpClient client =getconnection (host, port); About client.login (username, password); $         if(!ftpreply.ispositivecompletion (Client.getreplycode ())) { -             Throw NewIOException ("Login Error"); -         } -         returnclient; A     } +  the     /** - * Move the file (if the target file exists then do not move and return false) $      */ the     Static BooleanmoveFile (String curfilename, String targetfilename, ftpclient client) the             throwsIOException { the         intreply; theReply =Client.sendcommand (FTPCMD.RNFR, curfilename); -         if(Ftpreply.isnegativepermanent (Reply)) { in             //logger.error ("FTP Move file error. Code: "+ Reply); theSystem.out.println ("FTP Move file error. Code: "+reply); the             return false; About         } theReply =Client.sendcommand (Ftpcmd.rnto, targetfilename); the         if(Ftpreply.isnegativepermanent (Reply)) { the             //logger.error ("FTP Move file error. Code: "+ Reply); +System.out.println ("FTP Move file error. Code: "+reply); -             return false; the         }Bayi         return true; the     } the  -     /** - * Read File list the      */ the @Deprecated the     StaticString[] Getfilenamelist (ftpclient client)throwsIOException { theString names[] =client.listnames (); -         if(!ftpreply.ispositivecompletion (Client.getreply ())) { the             Throw NewIOException ("Get File Name list error"); the         } the         returnnames;94     } the  the     /** the * Read File98      */ About     StaticString ReadFile (string path, FtpClient client)throwsIOException { - Client.setfiletype (ftp.ebcdic_file_type);101BufferedReader BF =NewBufferedReader (102                 NewInputStreamReader (Client.retrievefilestream (path), "UTF-8"));103StringBuilder SB =NewStringBuilder ();104 String str; the          while(str = bf.readline ())! =NULL) {106Sb.append (str). append ("\ n");107         }108         returnsb.tostring ();109     } the 111 @Deprecated the     Static Booleandownfile (String RemotePath, String LocalPath, ftpclient client)113             throwsIOException { theFileOutputStream fos =NewFileOutputStream (localPath); the Client.setfiletype (ftpclient.binary_file_type); the client.retrievefile (RemotePath, FOS);117         return false;118     }119  -     /**121 * Write Files122      */123     Static BooleanStoreasfile (String context, string RemotePath, ftpclient client)124             throwsIOException { theOutputStream out =Client.storefilestream (remotepath);126OutputStreamWriter writer =NewOutputStreamWriter (out, "UTF-8");127 writer.write (context); - Writer.flush ();129 writer.close (); the         return true;131     } the 133     Static voidClose (ftpclient client) {134         Try {135             if(Client! =NULL) {136 Client.disconnect ();137             }138}Catch(IOException e) {139  $         }141     }142}

Ftputil

[Java] uses Apache's commons-net library for FTP operations