Java中的客户端套接字编程-从服务器端写入客户端套接字的麻烦

Question

So I am trying to create a simple server client program, where multiple clients can connect to a single server. I'm running a thread on both client side and server side. I have a file "loginuser.txt" which has text for 5 lines. This code is the server thread. When I call a outToClient.println("xxx") or anything, the Client is NOT receiving MORE than ONE line at a time. Each time the user enters anything on the keyboard (on client terminal), the next line of the file is being displayed on the same terminal. Can someone tell me why this is happening? Where am I going wrong? Basic issue: For a println() of a single line from server to client, it seems like I have to type something every time on the client side.

BufferedReader inFromUser=new BufferedReader(new InputStreamReader(System.in));
BufferedReader inFromClient=new BufferedReader(new InputStreamReader(client.getInputStream()));
BufferedReader userlogr=new BufferedReader(new FileReader("loginuser.txt"));
PrintWriter outToClient = new PrintWriter(client.getOutputStream(), true);
if(check==1)
    {
        fromclient=inFromClient.readLine();
        if(fromclient.compareTo("xxx")==0)
        {
            String line;
            while((line=userlogr.readLine())!=null)
            {
                System.out.println(line);
                outToClient.println(line);
                outToClient.flush();
            }

        }
    }

Answer 1

I have had this issue before. There are usually three things

1.)Also check the strings your sending has "\\n" at the end. using \\n and println would mess up the carriage return since it would be doubled.Remove any extra "\\n" and try it.(High possibility this is the problem in your case)

2.) The client side does not have a while loop to output the entire data being passed. You are sending the data line by line. Check if the client is closing itself after the data is received.

3.) Check your threads on the client side. I do not know how your client side thread works, but mine used to get blocked by other threads.