网络编程创建客户端和服务端

创建服务端                                                                                                                                     

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

public class BasicSocketServer {
    public static void main(String[] args) {
        Socket socket =null;
        BufferedReader br = null;
        try {
            ServerSocket serverSocket = new ServerSocket(8888);
            System.out.println("服务器启动等待监听。。。。"
            );
            socket = serverSocket.accept();
            br =new BufferedReader(new InputStreamReader(socket.getInputStream()));
            System.out.println(br.readLine());
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if (br !=null) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (socket!=null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

    }
}

 创建客户端

import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;

public class BasicSocketClient {
    public static void main(String[] args) {
        Socket socket =null;
        PrintWriter pw=null;
        try {

            socket =new Socket("127.0.0.1",8888);
            pw = new PrintWriter(socket.getOutputStream());

            pw.println("服务端 您好！");
            pw.flush();
        }catch (IOException e){
            e.printStackTrace();
        }finally {
            if(pw!=null){
                pw.close();
            }
            if (socket!=null) {

                    try {
                        socket.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }


            }
        }
    }