方式一：同步阻塞方式（BIO）：

服务器端（Server）：

package com.ietree.basicskill.socket.mode1;import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;/** * 服务端 */public class Server { // 端口号 final static int PORT = 8765; public static void main(String[] args) { ServerSocket server = null; try { server = new ServerSocket(PORT); System.out.println("Server start......"); // 进行阻塞 Socket socket = server.accept(); // 创建一个程序执行客户端的任务 new Thread(new ServerHandler(socket)).start(); } catch (IOException e) { e.printStackTrace(); } finally { if(server != null){ try { server.close(); } catch (IOException e) { e.printStackTrace(); } } server = null; } }}

采用多线程来处理接收到的请求（ServerHandler）：

package com.ietree.basicskill.socket.mode1;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;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; try { in = new BufferedReader(new InputStreamReader(this.socket.getInputStream())); out = new PrintWriter(this.socket.getOutputStream(), true); String body = null; while (true) { body = in.readLine(); if(body == null){ break; } System.out.println("Server: " + body); out.println("服务器端回送响应的数据。"); } } 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; } }}

客户端（Client）:

package com.ietree.basicskill.socket.mode1;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.Socket;/** * 客户端 */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; try { socket = new Socket(ADDRESS, PORT); in = new BufferedReader(new InputStreamReader(socket.getInputStream())); out = new PrintWriter(socket.getOutputStream(), true); // 向服务器端发送数据 out.println("接收到客户端的请求数据......"); 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; } }}

程序输出：

Server：

Server start......Server: 接收到客户端的请求数据......

Client：

Client: 服务器端回送响应的数据。

同步非阻塞（NIO）

异步非阻塞（AIO）

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