Jsch upload (based on SFTP protocol)

 Public classFtpfileuploadextendsBasecontroller {PrivateChannelsftp SFTP =NULL; PrivateSession sshsession =NULL; PrivateChannel Channel =NULL; /*** Connection to SFTP server *@return     */     Public Booleanconnectftpserver (String IP) {Try{Jsch Jsch=NewJsch (); Sshsession=jsch.getsession (Const.user, IP, const.port);            Sshsession.setpassword (Const.password); Properties Sshconfig=NewProperties (); Sshconfig.put ("Stricthostkeychecking", "no");            Sshsession.setconfig (Sshconfig);            Sshsession.connect (); Channel= Sshsession.openchannel ("SFTP");            Channel.connect (); SFTP=(CHANNELSFTP) channel; return true; } Catch(Exception e) {e.printstacktrace (); return false; }    }             PublicMap<string, string>fileUpload (String pathName, httpservletrequest request) {/*** Store return information*/Map<String,String> map =NewHashmap<>(); /*** Processing uploads*/                if(!servletfileupload.ismultipartcontent (Request)) {Map.put ("Error", "Please select the file to upload!" "); returnmap; }                if(!commtool.checkstr (PathName)) {Map.put ("Error", "file directory name cannot be empty!" "); returnmap; }                /*** file directory hierarchy creation*/String LocalPath= PathName + "/"; if(!" Temp. Equals (PathName)) {SimpleDateFormat format=NewSimpleDateFormat ("Yyyy-mm-dd"); String Ymd= Format.format (NewDate ()); LocalPath+ = Ymd + "/"; }                /*** Maximum file size*/        LongMaxSize = 1000000000; /*** Upload*/Fileitemfactory Factory=Newdiskfileitemfactory (); Servletfileupload Upload=Newservletfileupload (Factory); Upload.setheaderencoding ("Utf-8"); List<?> items =NULL; Try {            //If the uploaded file is more than one, set the key flag            intFlag = 1; Items=upload.parserequest (Request); Iterator<?> iterator =Items.iterator ();  while(Iterator.hasnext ()) {Fileitem Item=(Fileitem) iterator.next (); String FileName=Item.getname (); if(!Item.isformfield ()) {                    //File Size Check                    if(Item.getsize () >maxSize) {Map.put ("ErrorInfo", "Upload file size exceeds limit!" "); returnmap; }                    /** Check extension*/String Fileext= Filename.substring (Filename.lastindexof (".") +1). toLowerCase (); //Move the workspace to the appropriate directorystring[] folders = Localpath.split ("/");  for(String folder:folders) {if(Folder.length () > 0) {                            Try{sftp.cd (folder); } Catch(sftpexception e) {Try{Sftp.mkdir (folder);                                SFTP.CD (folder); } Catch(sftpexception E1) {Map.put ("ErrorInfo", "Server side folder operation Error"); returnmap; }                            }                        }                    }                                        //Reset file nameString NewFileName = Ymdtools.currenttimestamp () + "." +Fileext; //Upload a file                    Try{sftp.put (Item.getinputstream (), newfilename); //address returned when reading from ExcelString Resultpath = Const.base_path + LocalPath +NewFileName; Map.put ("Eurl" +flag, Resultpath); Flag++; } Catch(Exception E1) {e1.printstacktrace (); Map.put ("ErrorInfo", "Write File Error"); }                    //file upload completed, working directory callback, so that other files upload                     for(inti=0; i<folders.length-1; i++) {                        Try{sftp.cd (".."); } Catch(sftpexception e) {map.put ("ErrorInfo", "folder callback error occurred"); returnmap; }                    }                }            }        } Catch(fileuploadexception e) {map.put ("ErrorInfo", "Receive file Exception!"); returnmap; } finally{releaseresource (); }                returnmap; }        /*** Release Resources *@paramSFTP *@paramsshsession *@paramChannel*/     Public voidReleaseresource () {if(Channel! =NULL) {channel.disconnect (); }        if(Sshsession! =NULL) {sshsession.disconnect (); }        if(SFTP! =NULL) {sftp.disconnect (); }    }        /*** Delete Files *@paramDirectory *@throwsException*/     Public voidDelete (String directory) {intindex = Directory.lastindexof ("/"); String dir= directory.substring (0, index); String DeleteFile= directory.substring (index + 1); System.out.println ("DIR" +dir); System.out.println ("DeleteFile" +DeleteFile); Try{sftp.cd (dir);        SFTP.RM (DeleteFile); } Catch(sftpexception e) {e.printstacktrace (); }    } }

Jsch upload (based on SFTP protocol)