TCP

TCP 客户端套接字：Socket 服务端套接字：ServerSocket TCP（传输控制协议）一种基于连接的通信协议。可靠传输 Server package com.tcp; import java.io.*; import java.net.ServerSocket; import java.net.Socket; /** * 服务器端 */ public class Server { public static void main(String[] args) { ServerSocket serverSocket = null; try { serverSocket = new ServerSocket(12345); System.out.println("服务启动："+serverSocket.getInetAddress().getHostAddress()+":"+serverSocket.getLocalPort()); Socket accept = serverSocket.accept(); System.out.println("客户端："+accept.getInetAddress().getHostAddress()+":"+accept.getLocalPort()); BufferedReader sis = new BufferedReader(new InputStreamReader(System.in)); BufferedReader is = new BufferedReader(new InputStreamReader(accept.getInputStream())); PrintWriter os = new PrintWriter(new OutputStreamWriter(accept.getOutputStream())); while (true){ String line; if ((line=is.readLine())!=null){ System.out.println("收到客户端："+line); if (line.equals("bye")){ break; }else { os.println(sis.readLine()); os.flush(); } } } is.close(); os.close(); accept.close(); } catch (IOException e) { e.printStackTrace(); }finally { try { serverSocket.close(); } catch (IOException e) { e.printStackTrace(); } } } } Client package com.tcp; import java.io.*; import java.net.Socket; /** * 客户端 */ public class Client { public static void main(String[] args) { try { Socket socket = new Socket("127.0.0.1",12345); BufferedReader sis = new BufferedReader(new InputStreamReader(System.in)); BufferedReader is = new BufferedReader(new InputStreamReader(socket.getInputStream())); PrintWriter os = new PrintWriter(new OutputStreamWriter(socket.getOutputStream())); String line; while (true){ if ((line=sis.readLine())!=null){ if ("bye".equals(line)){ System.exit(0); } os.println(line); os.flush(); } String readLine = is.readLine(); System.out.println("收到服务端："+readLine); } } catch (IOException e) { e.printStackTrace(); } } } UDP UDP采用Datagram（数据报）传输，数据包是一种尽力而为的传送数据的方式，它只是 把数据的目的地记录在数据包中，然后就直接放在网络上，系统不保证数据是否能安全到达，或者什么时候可以送到，它并不保证传送质量。 ...