java 简单的TCP接收数据与发送数据

package com.xiuye.ooooo;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.net.Socket;import java.util.Scanner;public class Client {public static void main(String[] args) {Socket socket = null;try {System.out.println("connecting...");socket = new Socket("localhost", 8888);System.out.println("connection success");Scanner in = new Scanner(System.in);PrintWriter pw = new PrintWriter(new OutputStreamWriter(socket.getOutputStream(),"utf-8"),true);String str = "";while(!(str = in.nextLine()).equals("q")){pw.println(str);}pw.println("bye-bye");pw.close();in.close();} catch (Exception e) {e.printStackTrace();}finally{if(socket!=null){try{socket.close();}catch(Exception e){}}}}}

<pre name="code" class="java">package com.xiuye.ooooo;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.net.ServerSocket;import java.net.Socket;public class Server {private static class ClientHandler implements Runnable {private Socket socket;public ClientHandler(Socket socket) {this.socket = socket;}@Overridepublic void run() {try {BufferedReader  br = new BufferedReader(new InputStreamReader(socket.getInputStream(),"utf-8"));String str = "";//socket.getOutputStream().close();while((str = br.readLine()) != null){System.out.println(socket.getRemoteSocketAddress()+":"+ str);}br.close();} catch (Exception e) {e.printStackTrace();}finally{System.out.println("client is over");if(socket!=null){try {socket.close();} catch (IOException e) {e.printStackTrace();}}}}}public static void main(String[] args) {ServerSocket server = null;try {server = new ServerSocket(8888);while (true) {System.out.println("listening...");Socket socket = server.accept();System.out.println("connected...");ClientHandler handler = new ClientHandler(socket);Thread t = new Thread(handler);t.start();}} catch (Exception e) {e.printStackTrace();}finally{if(server!=null){try {server.close();} catch (IOException e) {e.printStackTrace();}}}}}