java TCP连接小练习

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客户端向服务器写字符串(键盘录入),服务器(多线程)将字符串反转后写回,客户端再次读取到是反转后的字符串

Client.java:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

public class Client {

	public static void main(String[] args) throws UnknownHostException, IOException {
		Scanner sc = new Scanner(System.in);				//创建键盘录入对象
		Socket socket = new Socket("127.0.0.1", 6666);		//创建客户端,指定ip地址和端口号
		
		BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));	//获取输入流
		PrintStream ps = new PrintStream(socket.getOutputStream());//获取输出流
		
		ps.println(sc.nextLine());							//将字符串写到服务器去
		System.out.println(br.readLine()); 					//将反转后的结果读出来
		
		socket.close();
	}

}

Server.java:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {

	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		ServerSocket server = new ServerSocket(6666);
		System.out.println("服务器启动,绑定6666端口");
		
		while(true) {
			final Socket socket = server.accept();					//接受客户端的请求
			
			new Thread() {											//开启一条线程
				public void run() {
					try {
						BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));	//获取输入流
						PrintStream ps = new PrintStream(socket.getOutputStream());//获取输出流
						
						String line = br.readLine();				//将客户端写过来的数据读取出来
						line = new StringBuilder(line).reverse().toString();	//链式编程
						ps.println(line);							//反转后写回去
						
						socket.close();
					} catch (IOException e) {						
						
						e.printStackTrace();
					}
				}
			}.start();
		}
	}

}