练习利用Socket实现双人聊天的简单程序。

Server端代码实现

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;

/**
 * Created by sandy on 08/03/2017.
 */
public class ChatServer {

    public  int port = 20013;

    public ChatServer() {

    }

    public ChatServer(int port) {
        this.port = port;
    }

    public void service() {
        try {
            ServerSocket server = new ServerSocket(port);

            Socket socket = server.accept();

            try {
                DataInputStream in = new DataInputStream(socket.getInputStream());

                DataOutputStream out = new DataOutputStream(socket.getOutputStream());

                Scanner scanner = new Scanner(System.in);

                while (true) {
                    String accept = in.readUTF();
                    System.out.println(accept);

                    String send = scanner.nextLine();
                    System.out.println("Server: " + send);
                    out.writeUTF("Server: " + send);
                }
            } finally {
                socket.close();
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main (String args []) {
        new ChatServer().service();

    }
}

Client端代码实现

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.Scanner;

public class ChatClient {
    private String host = "localhost";
    private int port = 20013;

    public ChatClient() {
    
    }

    public ChatClient(String host, int port) {
        this.host = host;
        this.port = port;
    }

    public void chat() {
        try {
            Socket socket = new Socket(host, port);

            try {
                DataInputStream in = new DataInputStream(socket.getInputStream());

                DataOutputStream out = new DataOutputStream(socket.getOutputStream());

                Scanner scanner = new Scanner(System.in);

                while (true) {
                    String send = scanner.nextLine();
                    System.out.println("Client: " + send);
                    out.writeUTF("Client: " + send);

                    String accept = in.readUTF();
                    System.out.println(accept);
                }
            } finally {
                socket.close();
            }
        } catch (IOException e) {
            e.printStackTrace();    
        }
    }

    public static void main(String args []) {
        new ChatClient().chat();
    }
}