public static boolean exists(String filepath,String username,String pwd) throws Exception
    {
    SmbFile file = new SmbFile("smb://"+username+":"+pwd+"@"+filepath);
try{
    return file.exists();
}catch(Exception ex){
    return false;
}
    }

public static boolean fileRename(String filepath,String newFilename,String username,String pwd)
    {
    try{
         SmbFile f=new SmbFile("smb://"+username+":"+pwd+"@"+filepath);
         if(f.isFile()){
     String str=filepath.substring(0,filepath.lastIndexOf("/"));
     str="smb://"+username+":"+pwd+"@"+str+"/"+newFilename;
     f.renameTo(new SmbFile(str));
         }else if(f.isDirectory()){
         String str=filepath.substring(0,filepath.length()-1);
         str=filepath.substring(0,str.lastIndexOf("/"));
         str="smb://"+username+":"+pwd+"@"+str+"/"+newFilename;
         f.renameTo(new SmbFile(str));              
         }
     return true;
    }catch(Exception ex){
        return false;
    }
    }

public static void mkdir(String dir,String username,String pwd)
{
try{
     SmbFile f=new SmbFile("smb://"+username+":"+pwd+"@"+dir);
     if(!f.exists())
f.mkdir();
}catch(Exception ex)
{
}
}

public static void mkfile(String filepath,String username,String pwd)
{
try
{
     SmbFile f=new SmbFile("smb://"+username+":"+pwd+"@"+filepath);
     if(!f.exists())
f.createNewFile();
}catch(Exception ex)
{
}
}

public static void mkfile(String filepath,String username,String pwd,String content)
{
try
{
     SmbFile f=new SmbFile("smb://"+username+":"+pwd+"@"+filepath);
     if(!f.exists())
f.createNewFile();
writeFile(filepath,content,username,pwd);
}catch(Exception ex)
{
}
}

public static boolean isdir(String filepath,String username,String pwd) throws Exception
{
String dir="smb://"+username+":"+pwd+"@"+filepath;
SmbFile f=new SmbFile(dir);
return f.isDirectory();
}