javanio1----传统io

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
//每个线程去独自完成他们的客户端请求
public class MyServer {
        private static ExecutorService executorService = Executors.newCachedThreadPool();
        private static class HandleMsg implements Runnable{
        Socket client;
        public HandleMsg(Socket client){
            this.client = client;
        }
        @Override
        public void run() {
            BufferedReader bufferedReader = null;
            PrintWriter printWriter = null;
            try {
                bufferedReader = new BufferedReader(new InputStreamReader(client.getInputStream()));
                printWriter = new PrintWriter(client.getOutputStream(),true);            //true是随时刷新
                String inputLine = null;
                long a = System.currentTimeMillis();
                while ((inputLine = bufferedReader.readLine())!=null){// 卡住，等待客户输入，一直等待，直到客户端printWriter输出流关闭，
                    printWriter.println(inputLine+"server:");
                }
                long b = System.currentTimeMillis();
                System.out.println("此线程花费了："+(b-a)+"秒！");
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                try {
                    bufferedReader.close();
                    printWriter.close();
                    client.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public static void main(String[] args) throws IOException {
        ServerSocket server = new ServerSocket(8686);
        Socket client = null;
        while (true){
            client = server.accept();       //服务端监听到一个客户端请求,卡住，等待连接，
            System.out.println(client.getRemoteSocketAddress()+"地址的客户端连接成功!");
            executorService.submit(new HandleMsg(client));
        }
    }
}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetSocketAddress;
import java.net.Socket;

public class MyClient {
    public static void main(String[] args) throws IOException {
        Socket client = null;
        PrintWriter printWriter = null;
        BufferedReader bufferedReader = null;
        try {
            client = new Socket();
            client.connect(new InetSocketAddress("localhost",8686));
            printWriter = new PrintWriter(client.getOutputStream(),true);
            printWriter.println("hello");
            printWriter.flush();

            bufferedReader = new BufferedReader(new InputStreamReader(client.getInputStream()));            //读取服务器返回的信息并进行输出
            System.out.println("来自服务器的信息是："+bufferedReader.readLine());
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            printWriter.close();
            bufferedReader.close();
            client.close();
        }
    }
}