Java Socket套接字应用实例-java学习笔记(1)

为了学习Socket而写的一段小代码..实现客户端和服务端之间的文字通讯功能..

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客户端实例代码:

 

public class Client { public static void startClient() throws IOException { try { Socket csocket = new Socket("127.0.0.1",15409);//创建Socket应用实例..连接服务器127.0.0.1 ..端口15409.. System.out.println("Client OK~"); System.out.println("==============="); System.out.println(""); BufferedReader socketIn = new BufferedReader( new InputStreamReader(csocket.getInputStream()));//从socket接收到的信息.. PrintStream socketOut = new PrintStream(csocket.getOutputStream());//从socket要发送的信息.. BufferedReader userIn = new BufferedReader( new InputStreamReader(System.in));//用户输入的信息.. String s; while ( true ) { System.out.print("Client Message: "); s = userIn.readLine(); socketOut.println(s);//发送用户输入信息.. if ( s.trim().equals("BYE") ) break;//若用户输入为"BYE"则结束通讯连接.. else { System.out.println("Please wait Server Message.."); System.out.println(""); } s = socketIn.readLine();//阻塞程序..直到从socket上读取到收到的信息.. System.out.println("Server Message: " + s); if ( s.trim().equals("BYE") ) break;//若接收到的信息为"BYE"则结束通讯连接.. } socketIn.close(); socketOut.close(); userIn.close(); csocket.close(); } catch(Exception e) { System.out.println("Error: " + e); } } public static void main(String [] args) { try { startClient(); } catch (Exception e) { System.out.println("Error: " + e); } } }  

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服务端实例代码:

 

public class Server { public static void startServer() throws IOException{ try { ServerSocket serversocket = new ServerSocket(15409);//建立socket实例..监听15409端口.. System.out.println("Listening..."); Socket ssocket = serversocket.accept();//阻塞程序..直到收到客户端的连接请求成功建立连接.. System.out.println("Server Connection OK~"); System.out.println("========================"); System.out.println(""); BufferedReader socketIn = new BufferedReader(new InputStreamReader(ssocket.getInputStream()));//从socket接受到的信息.. PrintStream socketOut = new PrintStream(ssocket.getOutputStream());//从socket要发送的信息.. BufferedReader userIn = new BufferedReader(new InputStreamReader(System.in));//用户输入的信息.. String s; while (true) { System.out.println("Please wait client 's message.."); System.out.println(""); s = socketIn.readLine();//阻塞程序..直到从socket上读取到接受到的信息.. System.out.println("Client Message: " + s); System.out.println(""); if ( s.trim().equals("BYE") ) break;//若接受到的信息为"BYE"..则结束通讯连接.. System.out.print("Server Message: "); s = userIn.readLine();//获取用户输入的信息.. socketOut.println(s);//从socket发送用户输入的信息.. if ( s.trim().equals("BYE") ) break;//若用户输入信息为"BYE"..则结束通讯连接.. } socketIn.close(); socketOut.close(); userIn.close(); ssocket.close(); } catch (Exception e) { System.out.println("Error: " + e); } } public static void main(String [] args) { try { startServer(); } catch (Exception e) { System.out.println("Error: " + e); } } }  

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实测效果不错..可以实现简单的文字通讯功能..对socket的使用有了一个简单的了解..下一步准备试验SSL连接的实现..