Java网络通信基础编程

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; 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; 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）