Application of Java Multithreading for server-side and multi-client communication

Application of multithreading to achieve the communication between the server and multithreading basic steps 1, server-side Create ServerSocket, loop call accept () Waiting for client link 2, the client creates a socket and the request and server-side link 3, the server side accepts the client request, Create a Socekt with the client to establish a leased line Link 4, establish a linked socket on a separate thread on the dialog 5, the server continues to wait for the new linked server side Server.java

Package Test.concurrent.socket;import Java.io.*;import Java.net.inetaddress;import java.net.serversocket;import java.net.socket;/** * Created on 15-6-22.            * Socket communication based on TCP protocol, implement user login * Server-side */public Class Server {public static void main (string[] args) {try {            1, create a server-side socket, that is, ServerSocket, specify the bound port, and listen to this port serversocket serversocket = new ServerSocket (8888);            Socket socket = NULL;            Number of logged clients int count = 0;            SYSTEM.OUT.PRINTLN ("* * * server is about to start, waiting for client links * * *"); The loop listener waits for the client's link while (true) {//calls the Accept () method to start listening, waiting for the client's link to socket = Serversocket.ac                Cept ();                Create a new thread serverthread Serverthread = new Serverthread (socket);                Start thread Serverthread.start (); count++;                Count the number of clients System.out.println ("Number of clients:" + count);                InetAddress address = socket.getinetaddress (); SYstem.out.println ("IP of current client:" + address.gethostaddress ());        }} catch (IOException e) {e.printstacktrace (); }    }}

Server thread processing class Serverthread.java

Package Test.concurrent.socket;import Java.io.*;import java.net.socket;/** * Created-on 15-6-22.    * Server thread processing Classes */public class Serverthread extends Thread {//and the socket socket socket associated with this threading = null;    Public serverthread (socket socket) {this.socket = socket;        }//The operation performed by the thread, responding to the client's request public void run () {InputStream is = null;        InputStreamReader ISR = null;        BufferedReader br = null;        OutputStream OS = null;        PrintWriter pw = null;            try {//Gets an input stream and reads the client's information is = Socket.getinputstream (); ISR = new InputStreamReader (IS); Convert bytes to character stream br = new BufferedReader (ISR);            Add buffer String info = null;            The loop reads the data while ((info = br.readline ()) = null) {System.out.println ("I am the server, the client says" +info); } socket.shutdowninput ();            Closes the input stream//gets the output stream, responding to the client's request OS = Socket.getoutputstream (); PW = new PrintWriter (OS); PackagingFor the print stream Pw.write ("welcome You");  Pw.flush ();        The cache output} catch (IOException e) {e.printstacktrace (); }finally {try {//close resource if (PW = null) Pw.clo                    SE ();                    if (OS! = null) os.close ();                    if (is! = null) is.close ();                    if (ISR! = null) isr.close ();                    if (br! = null) br.close ();                if (socket! = NULL) socket.close ();                } catch (IOException e) {e.printstacktrace (); }        }    }}

Client Client.java

Package Test.concurrent.socket;import Java.io.*;import java.net.socket;/** * Created-on 15-6-22. * Client */public class Client {public static void main (string[] args) {try {//1, create client socket, specify server port number            and address socket socket = new socket ("localhost", 8888); 2, get the output stream, send information to the server outputstream OS = Socket.getoutputstream (); BYTE output stream PrintWriter pw = new PrintWriter (OS); Wraps the output stream as a print stream pw.write ("User name: Tom;            Password: 456 ");            Pw.flush (); Socket.shutdownoutput ();            Turn off the output stream InputStream is = Socket.getinputstream ();            InputStreamReader ISR = new InputStreamReader (IS);            BufferedReader br = new BufferedReader (ISR);            String info = null;            The loop reads while ((info = br.readline ()) = null) {System.out.println ("I am the client: Server says:" + info);            } br.close ();            Is.close ();            Isr.close ();            Pw.close (); Os.cLose ();        Socket.close ();        } catch (IOException e) {e.printstacktrace (); }    }}

Application of Java Multithreading for server-side and multi-client communication