BIO Socket网络编程实例 附代码

参考https://github.com/queerner002/netty-demo netty-demo bio

Server端

package com.wp.bio;

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


public class Server {

    final static int PROT = 8765;

    public static void main(String[] args) {

        ServerSocket server = null;
        try {
            server = new ServerSocket(PROT);
            System.out.println(" server start .. ");
            //进行阻塞
            while (true) {//这里应该循环，使得可以接受多个客户端的请求。
                Socket socket = server.accept();
                //新建一个线程执行客户端的任务
                new Thread(new ServerHandler(socket)).start();
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (server != null) {
                try {
                    server.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            server = null;
        }
    }
}

Client端

package com.wp.bio;

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

public class Client {

    final static String ADDRESS = "127.0.0.1";
    final static int PORT = 8765;

    public static void main(String[] args) {

        Socket socket = null;
        BufferedReader in = null;
        PrintWriter out = null;
        BufferedReader reader = null;
        try {
            socket = new Socket(ADDRESS, PORT);
            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            out = new PrintWriter(socket.getOutputStream(), true);
            reader = new BufferedReader(new InputStreamReader(System.in));
            //向服务器端发送数据
            //每进行一次out.println，就会收到一次服务器的响应。
            out.println("接收到客户端的请求数据 " + reader.readLine());
            System.out.println("接收到服务器返回数据: " +  in.readLine());

//            out.println("接收到客户端的请求数据1111...");
//            System.out.println("Client: " +  in.readLine());
//
//            Thread.sleep(3000);
//            out.println("接收到客户端的请求数据...");
//            out.println("接收到客户端的请求数据1111...");
//            String response = in.readLine();
//            System.out.println("Client: " + response);

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (out != null) {
                try {
                    out.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if (socket != null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            socket = null;
        }
    }
}

ServerHandler类

package com.wp.bio;

import java.io.*;
import java.net.Socket;

public class ServerHandler implements Runnable {

    private Socket socket;

    public ServerHandler(Socket socket) {
        this.socket = socket;
    }

    @Override
    public void run() {
        BufferedReader in = null;
        PrintWriter out = null;
        BufferedReader reader = null;
        try {
            in = new BufferedReader(new InputStreamReader(this.socket.getInputStream()));
            out = new PrintWriter(this.socket.getOutputStream(), true);
            reader = new BufferedReader(new InputStreamReader(System.in));
            String body = null;
            while (true) {
                body = in.readLine();
                if (body == null) break;
                System.out.println("Server :" + body);
                //out.println("服务器端回送响的应数据.");
                out.println(reader.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (out != null) {
                try {
                    out.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if (socket != null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            socket = null;
        }
    }
}