Socket communication based on TCP protocol, realize multithreading simple login __ Multithreading

Thank you for the Web "Java socket application-communication is so practiced" directory Structure

Server.java

/** * Socket communication based on TCP protocol, implementation login * Service end/public class Server {public static void main (string[] args) {try {
            1 Create a server-side socket, serversocket, that can only bind to the port and listen for this port.
            ServerSocket serversocket = new ServerSocket (8888);
            Socket socket = NULL;
            int count = 0;
            2 Call Accept () method to start listening, waiting for the client's connection System.out.println ("**************** server is about to start, waiting for the client to connect *************");
                while (true) {//Call the Accept () method to begin listening, wait for the client's connection socket = Serversocket.accept ();
                A new thread is worn serverthread serverthread = new Serverthread (socket);
                Start thread Serverthread.start ();
                count++;
                System.out.println ("Number of clients:" +count);
                InetAddress address = socket.getinetaddress ();
            SYSTEM.OUT.PRINTLN ("Current client IP" +address);
        } catch (IOException e) {e.printstacktrace ();
}
    }} 

Serverthread. Java

/** * Server thread handling class/public class Serverthread extends thread {socket socket = NULL;
    Public serverthread (socket socket) {this.socket = socket;
        public void Run () {InputStream is = null;
        InputStreamReader ISR = null;
        BufferedReader br = null;
        OutputStream OS = null;
        PrintWriter pw = null; try {//3. Gets the input stream and reads the client information is = Socket.getinputstream ();//byte input stream ISR = new Inputstreamrea
            Der to convert a stream of bytes to a character stream br = new BufferedReader (ISR);//Add cache String info = null for input streams; while (info = Br.readline ())!= null) {//Loop reads client information System.out.println ("I am the server.")
            Client said "+ info";
            Socket.shutdowninput ()//closes the input stream//4. Gets the output stream, responding to the client request OS = Socket.getoutputstream ();
            PW = new PrintWriter (OS); Pw.write ("welcome you.")
            ");
        Pw.flush (); The catch (IOException e) {e.printstacktrace ();
                Finally {//5. Close resource try {if (PW!= null) pw.close ();
                if (OS!= null) os.close ();
                if (br!= null) br.close ();
                if (ISR!= null) isr.close ();
                if (ISR!= null) is.close ();
            if (ISR!= null) socket.close ();
            catch (IOException e) {e.printstacktrace (); }


        }
    }

}

Client.java

/** * Based on the TCP protocol socket communication, implementation login * Client * * Public class Client {public static void main (string[] args) {try {
            1. Create client socket, specify server address and port socket socket = new socket ("localhost", 8888); 2. Get the output stream. Used to send information to the server outputstream OS = Socket.getoutputstream ()//byte output stream printwriter pw = new PrintWriter (OS)
            //The output stream is packaged as a print stream Pw.write ("Username: admin2 Password: 123");
            Pw.flush (); Socket.shutdownoutput ()//Turn off output stream//3. Gets the input stream to read the server's response information InputStream InputStream = socket.getinputst
            Ream ();
            BufferedReader br = new BufferedReader (new InputStreamReader (InputStream));
            String info = null;
            while (info = Br.readline ())!= null) {System.out.println ("I am the client, server says + info");
            //4. Close other resources pw.close ();
            Os.close ();
        Socket.close ();
 catch (IOException e) {e.printstacktrace ();       }

    }
}