ftp vs sftp in JAVA

[ndedhia1]

I was hoping you could help me out with ftp vs sftp.
Below is a method that I have that I call to ftp files from one unix box
to another in house, but soon, we will have to ftp from here to NY so we
have to start using sftp. I know that we have open ssh on our unix
boxes but was wondering how different the syntax would be, going from
ftp to sftp.


Here is a method that I have written in my java code for ftping a file
to a specific location.
How can I change this so that it will sftp instead of ftp?
Do I need to change this line frome ftp to sftp and thats it:
URL("ftp://"+user+":"+password+"@"+host+".sbc.com:21/%2F"+remoteDirFile

ftpFile("upload","login","passwd","unixbox",remote,"",m_spreadName,"i");
 

private void ftpFile(String actionType,String user,String
password,String host,String remoteDirFile,String remoteFILE,String
localeFile,String modeType)
    {
     //modeType='a' for ascii || 'i' for binary
 
      if(actionType.equalsIgnoreCase("download"))  ///Download a file
      {
       try
       {
          URL url = new
 URL("ftp://"+user+":"+password+"@"+host+".sbc.com:21/%2F"+remoteDirFile
 +";type="+modeType);
 
          URLConnection conn = url.openConnection();
 
          PrintWriter ot = new PrintWriter(new FileWriter(localeFile));
          BufferedReader in = new BufferedReader(new
InputStreamReader(conn.getInputStream()));
          String line="";
 
          while((line = in.readLine()) != null)
          {
              ot.println(line);
          }
 
        ot.close();
        in.close();
 
       }
       catch (MalformedURLException m)
       {
          System.out.println(" Error: "+m);
       }
       catch (IOException ioe)
       {
 
         System.out.println(" Error: "+ioe);
         String weekDay = convertToValidWeekDay(determineValidWeekDay((new GregorianCalendar().get(Calendar.DAY_OF_WEEK + day--))));
 
         if(day < -7)
         {
           System.out.println(" No valid file(s) to "+actionType);
         }
 
         String remoteDirFile2="/production/"+weekDay+"/dir2/"+
 remoteFILE;
 
//ftpFile(actionType,user,password,host,remoteDirFile2,remoteFILE,locale File,modeType);
       }
      }
     else if(actionType.equalsIgnoreCase("upload"))  ///Upload a file;
Only binary files
      {
        try
        {
            URL url = new
URL("ftp://"+user+":"+password+"@"+host+".sbc.com:21/%2F"+remoteDirFile
); //'a' for ascii and 'i' for binary
 
            URLConnection conn = url.openConnection();
            OutputStream os = conn.getOutputStream();
            BufferedInputStream bis =  new BufferedInputStream(new
FileInputStream(localeFile));
            int number;
 
            while((number = bis.read()) != -1)
            {
              os.write(number);
              os.flush();
            }
 
            os.close();
            bis.close();
 
       }
       catch (MalformedURLException m)
       {
         System.out.println(" Error: "+m);
       }
       catch (IOException ioe)
       {
          System.out.println(" Error: "+ioe);
       }
      }
    }
 

[ndedhia1]

I switched the line to read:

URL("sftp://"+user+":"+password+"@"+host+".sbc.com:21/%2F"+remoteDirFile);
 

fyi..i switched the ftp:// to sftp://..

and it jumps to this exception:

Error: java.net.MalformedURLException: unknown protocol: sftp



Am I missing some import statements at the top or something?



This is in the JavaDocs:

Protocol handlers for the following protocols are guaranteed to exist on the search path :-

http, https, ftp, file, and jar


How Do I get sftp to be known as a known protocol?