java - Send multiple files using socket -


i'm trying send multiple files client server using socket when click upload button adds 1 file , second click adds second. code:

client

  void sendfile (string st, string na) throws ioexception{                      socket sock = new socket("127.0.0.1", 1112);                     //objectoutputstream out = new objectoutputstream(sock.getoutputstream());                     //outstream.writeobject("test message #");                     //outstream.flush();                     //fileinputstream fi =  null;              try {                 // todo add handling code here:                 fileinputstream fi = new fileinputstream(st);                  byte [] buffer = new byte[fi.available()];                  fi.read(buffer);                 objectoutputstream out = new objectoutputstream(sock.getoutputstream());                  out.writeobject(buffer);                 out.flush();                 out.close();                 //outstream.writeobject(buffer);                 write.println("send:file: " + na);                  write.flush();                  } catch (filenotfoundexception ex) {                 logger.getlogger(add_book.class.getname()).log(level.severe, null, ex);             } catch (ioexception ex) {                 logger.getlogger(add_book.class.getname()).log(level.severe, null, ex);                   }                 catch (exception ex)                  {                     system.out.println("error connecting server");                 }              sock.close();         }            `

call method: 

sendfile(coverpath,covername); sendfile(bookpath,bookname);

server

     public class uploadserver implements runnable      {         @override         public void run()          {             clientoutputstreams = new arraylist();             users = new arraylist();   try              {                 serversocket serversocket = new serversocket(1112);                  while (true)                  {                 socket clientsocket = serversocket.accept();                 objectoutputstream oos = new objectoutputstream(clientsocket.getoutputstream());                                  = clientsocket.getinputstream();                  thread listener = new thread(new uploadhandler(clientsocket));                 listener.start();                 textarea.append("request upload. \n");                                 ss = clientsocket;                 }             }             catch (exception ex)             {                 textarea.append("error making connection. \n");             }          } }    public class uploadhandler implements runnable     {           objectinputstream inputs;           objectinputstream input;        bufferedreader reader;        objectinputstream ois;        socket sock;          byte[] abyte = new byte[1];         int bytesread;        public uploadhandler(socket clientsocket)         {              try              {                 sock = clientsocket;                 inputs = new objectinputstream(sock.getinputstream());                 //input = new objectinputstream(sock.getinputstream());              }             catch (exception ex)              {                 textarea.append("unexpected error... \n");             }         }         @override        public void run()         {              try {                    byte [] buffer = (byte[]) inputs.readobject();                   fileoutputstream fi = new fileoutputstream("uploads\\"+name);                   fi.write(buffer);                   system.out.println("done");                } catch (ioexception ex) {                   logger.getlogger(server.class.getname()).log(level.severe, null, ex);               } catch (classnotfoundexception ex) {                   logger.getlogger(server.class.getname()).log(level.severe, null, ex);               }            }         }


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