Simple operation of FTP under the Org.apache.commons.net tool

/** * Connect FTP Server * @param IPIP address * @param port port number * @param username username * @param password password * @param ftppathftp subdirectory * @throws IOException */public int connectserver (string ip, int port, string username,string Password, string ftppath) throws Ioexce ption {System.out.println (this, "=============all_attributes===========" + "Ip_" +ip+ "Port_" +port+ "username_" + Username+ "Password_" +password+ "Ftppath_" +ftppath); int Reply;int Connectflag = 1;try {ftpclient.connect (IP, port);// Connect the FTP server//If using the default port, you can use Ftp.connect (URL) to connect directly to the FTP server Ftpclient.login (username, password); Reply = Ftpclient.getreplycode (); if (!  Ftpreply.ispositivecompletion (Reply)) {ftpclient.disconnect (); connectflag = 0; return connectflag;} Ftpclient.changeworkingdirectory (Ftppath);//Transfer to FTP server directory System.out.println (this, "=============connet_ftp_is_ok_ Falg_ "+connectflag+" =========== ");} catch (Exception e) {System.out.println (this, "=============connet_ftp_is_error" +connectflag+ "===========");} return Connectflag;} ---------------------------------------------------------------------------------------------------------------------------------- ------/** * Upload upload file * * @throws java.lang.Exception * @return-1 file does not exist-2 file content is empty >0 successfully uploaded, returns the size of the file * @param newname New file name after pass * @param filePath the path of the uploaded file */public long upload (string localPath, String newfilename) throws Exception {long resu lt = 0;try {File File = new file (LocalPath), if (!file.exists ()) {result = -1;//file does not exist}if (file.length () = = 0) {result =-2; The contents of the file are empty}//result = File.length (); is = new FileInputStream (file); Ftpclient.storefile (NewFileName, is); Ftpclient.logout (); System.out.println (This, "=========" +newfilename+ "File Upload succeeded ==========");} catch (Exception e) {e.printstacktrace (); System.out.println (This, "=========" +newfilename+ "File upload failed ==========");} finally{} return result; ---------------------------------------------------------------------------------/** * Upload via file path * @param filePath * @ return * @throws Exception */public long upload (String filePath) throws Exception {String newname = "", if (Filepath.indexof ("/") >-1) {newname = filepath.substring (Filepath.lastindexof ("/") + 1); } else {newname = FilePath;} return upload (FilePath, newname);} ----------------------------------------------/** * * closeserver * * Disconnect the link to the FTP server * * @throws java.io.IOException */pu Blic void CloseServer () throws Ioexception{try {if (is = null) {Is.close ();} if (ftpclient! = null) {Ftpclient.disconnect ();}} catch (IOException e) {e.printstacktrace ();}}     -------------------------------------------------/** * Reads a text file.        * */public static string Readtxtfile (File filepathandname) {string read;        FileReader Fileread;            try {fileread = new FileReader (filepathandname);            Bufread = new BufferedReader (fileread);                try {while ((read = Bufread.readline ()) = null) {Readstr = readstr + read+ "\ r \ n"; }} catch (IOException e) {//TODO Auto-genErated Catch block E.printstacktrace ();         }} catch (FileNotFoundException e) {//TODO auto-generated catch block E.printstacktrace ();        } System.out.println ("File content is:" + "\ r \ n" + readstr);    return readstr;     } Write Files------------------------------------------------------/** *. * */public static void Writetxtfile (String newstr,file filepathandname) throws ioexception{//Read the original file contents first, then        Write operation String Filein = newstr + "\ r \ n" + readstr + "\ r \ n";        Randomaccessfile mm = null;            try {mm = new Randomaccessfile (filepathandname, "RW");        Mm.writebytes (Filein);        } catch (IOException E1) {//TODO automatically generate catch block E1.printstacktrace ();                } finally {if (mm! = null) {try {mm.close (); } catch (IOException E2) {//TODO automatically generate catch block E2.printstacKtrace (); }}}}----------------------------------------------------/** * * downloadFile * * Download Resources for FTP server * @ param remotefilename To download file name * @param localdires Store path * @param ftppath FTP server to store subdirectories of files to download * * @throws JAVA.IO.IOEXC        Eption */public void DownloadFile (String remotefilename,string localdires, String ftppath) throws ioexception{    String strFilePath = localdires + "/" + remotefilename;           Write address file save path bufferedoutputstream BF = null;               Boolean success=false;            try {ftpclient.changeworkingdirectory (Ftppath);                        bf= New Bufferedoutputstream (New FileOutputStream (strFilePath));                        System.out.println (This, "=========" +remotefilename+ "Start download ==========");  Success = Ftpclient.retrievefile (REMOTEFILENAME,BF);            Download operation//Ftpclient.logout (); if (success==true) {System.out.println (this, "=========" +remotefilename+"Successfully downloaded to ==========" +localdires);        }} catch (IOException E1) {//TODO automatically generate catch block E1.printstacktrace ();                    } finally {if (null! = BF) {try {bf.flush ();                Bf.close ();                } catch (IOException E2) {//TODO automatically generate catch block E2.printstacktrace (); }}} if (Success=false) {System.out.println (this, "=========" +remotefilename+         "Download failed =========="); }    }        -----------------------------------------

Simple operation of FTP under the Org.apache.commons.net tool