Java implementation of FTP file upload download, solve slow, Chinese garbled, a number of file downloads and other issues

File upload public static Boolean uploadtoftp (String url,int port,string username,string password,string path,string filename　　, InputStream Input) {Boolean success=false;　　　　　　FtpClient ftp=new ftpclient ();//org.apache.commons.net.ftp try{if (port>-1) {ftp.connect (url,port); }else{ftp.connect (URL);//ftp The default port is 21}//A lot of people write the return value of the connection using Ftp.getreplycode (), but this causes the Storefilestream to return NULL if　　　　(Ftp.login (Username,password))　　　　　　{Ftp.enterlocalactivemode ();　　　　　　Ftp.setfiletype (Ftpclient.binary_file_type);　　　　　　Creates a directory that returns a failure ftp.makedirectory (path) if it exists;　　　　　　Switch directory ftp.changeworkingdirectory (path);　　　　　　Upload file//ftp protocol specifies that the file encoding format is iso-8859-1 filename=new String (filename.getbytes ("GBK"), "iso-8859-1");　　　　　　OutputStream out=ftp.storefilestream (filename);　　　　　　Byte[]bytearray=new byte[4096];　　　　　　int read=0;　　　　　　while ((Read=input.read (ByteArray))!=-1) {out.write (bytearray,0,read);　　　　　　} out.close ();　　　　　　Ftp.logout ();　　　Sucess=true;　}} catch (Exception e) {} finally{if (ftp.isconnected ()) {Ftp.disconnecct (); }}}//File Download public static Boolean downloadfromftp (String url,int port,string username,string password,string path,string L　　Ocalpath) {Boolean success=false;　　　　FtpClient ftp=new ftpclient ();//org.apache.commons.net.ftp try{int reply;　　　　　　if (port>-1) {ftp.connect (url,port); }else{ftp.connect (URL);//ftp default port is 21}//A lot of people write the return value of the connection using Ftp.getreplycode (), but this causes the storefilestream to return null ft　　　　　　P.login (Username,password) Ftp.enterlocalactivemode ();　　　　　　Ftp.setfiletype (Ftpclient.binary_file_type);　　　　　　Reply=ftp.getreplycode (); if (!　　　　　　　　Ftpreply.ispositioncompletion (Reply)) {ftp.disconnect ();　　　　　　Return success;s}//switch directory here can be judged, the failure of the switch indicates that FTP does not have this path ftp.changeworkingdirectory (path);　　　　　　Upload file Ftpfile[]fs=ftp.listfiles ();　　　　　　OutputStream Out=null;　　　　　　InputStream In=null; for (int i=0;i<fs.length;i++)　　　　　　{Ftpfile ff=fs[i];　　　　　　　　String Outfilename=ff.getname ();　　　　　　　　When creating a local file, turn the encoding format back to string Localfilename=new string (Ff.getname (). GetBytes ("iso-8859-"), "GBK");　　　　　　　　File Localfile=new file (localpath+lcoalfilename);　　　　　　　　Out=new FileOutputStream (LocalFile); 　　　　　　　　In=ftp.retrievefilestream (Outfilename);　　　　　　　　Byte[]bytearray=new byte[4096];　　　　　　int read=0;　　　　　　while ((Read=in.read (ByteArray))!=-1) {out.write (bytearray,0,read);　　　　　　}//This sentence is important to operate the channel of this FTP stream multiple times, to wait for his every command to complete ftp.completependingcommand ();　　　　　　Out.flush ();　　　　　　Out.close ();　　　　　　Ftp.logout ();　　Sucess=true;　　　　　　} catch (Exception e) {} finally{if (ftp.isconnected ()) {Ftp.disconnecct (); }}} The above code in the blog Park Editor hand may be a bit wrong, the above two ways faster than uploading with storefile download with Retrievefile This method is much faster

　　

Java implementation of FTP file upload download, solve slow, Chinese garbled, a number of file downloads and other issues