Multi-threaded querying for files on FTP server

This is the case with a recent automated project that, when batch runs successfully, there will be a specific build file on the FTP server. But I'm not sure when it's going to be, it's about 5 minutes of batch running, so when you set up checkpoints in the script, you need to refresh the files on the FTP server at some time.

On the net down a serv-u to build a local FTP Server, it is easy to build debugging. And then a COMMONS-NET-3.3.JAR packet to deal with the FTP-related business.

You may not need to use multi-threaded, but try the next, single-threaded to exit and then log back on to the FTP server,ftp Server files are not automatically refreshed. So in the main function, I start a thread every once in a while to see if the file I'm looking for exists.

Importjava.io.IOException;Importorg.apache.commons.net.ftp.FTPClient;ImportOrg.apache.commons.net.ftp.FTPFile;Importorg.apache.commons.net.ftp.FTPReply; Public classFtputilextendsThread {PrivateFtpClient ftpclient =Newftpclient (); PrivateString ftpdict = "."; Private BooleanFlag; Private Static BooleanFind =false; Private Static Longtimeslot = 10000;  Public BooleanConnect (String Host,intport, string Username, string password)throwsIOException {ftpclient.connect (host, Port); if(Ftpreply.ispositivecompletion (Ftpclient.getreplycode ())) {if(ftpclient.login (username, password)) {return true;        }} ftpclient.disconnect (); return false; }     Public Booleanfileexist (String dict, String filename) {string Pattren= "\\. {1,} "; Ftpdict= Ftpdict + "/" +dict; Try{ftpfile[] files=ftpclient.listfiles (ftpdict);  for(inti = 0; i < files.length; i++) {                if(Files[i].getname (). Equalsignorecase (filename)) {flag=true; }                if(Files[i].isdirectory ()&&!Files[i].getname (). Matches (Pattren))                {FileExist (Files[i].getname (), filename); }            }        } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }        returnFlag; }     Public voidDisconnect ()throwsIOException {if(ftpclient.isconnected ()) {ftpclient.disconnect (); }    }     Public voidrun () {System.out.println (GetName ()+ "Thread started!"); Ftputil FTP=NewFtputil (); Try{ftp.connect ("127.0.0.1", +, "admin", "admin"); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }        Booleanb = Ftp.fileexist (ftp.ftpdict, "3.txt");        System.err.println (b); if(b) {Find=true; }        Try{ftp.disconnect (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); } System.out.println (GetName ()+ "Thread ended!"); } @SuppressWarnings ("Static-access")     Public Static voidMain (string[] args)throwsException {//TODO auto-generated Method Stub        intindex = 0;  while(!find) {            NewFtputil (). Start ();            Thread.CurrentThread (). Sleep (timeslot); if(Index = = 4) {                return; } Index++; }    }}

I think there should be an API is to refresh the FTP server, and has not yet groped, have to tell a thank you.

Multi-threaded querying for files on FTP server