java基础学习笔记——TCP/客户端递交返回大写

package textChange;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;

public class TransServer {
	
	public static void main(String[] args) throws UnknownHostException, IOException
	{
		ServerSocket ss = new ServerSocket(10005);
		Socket s = ss.accept();
		String ip = s.getInetAddress().getHostAddress();
		System.out.println(ip+".....connected");

		BufferedReader bufIn = 
				new BufferedReader(new InputStreamReader(s.getInputStream()));
		
		//获取socket输出流并装饰
		PrintWriter out = new PrintWriter(s.getOutputStream(),true);
		
		String line = null;
		while((line=bufIn.readLine())!=null)
		{
			System.out.println(line);
			out.println(line.toUpperCase());
		}
		s.close();
		ss.close();
	}

}

package textChange;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class TransClient {
	
	public static void main(String[] args) throws UnknownHostException, IOException
	{
		/*
		 * 创建socket客户端对象
		 * 
		 */
		Socket s = new Socket("lenovo-PC", 10005);
		
		BufferedReader bufr = 
				new BufferedReader(new InputStreamReader(System.in));
		//new BufferedWriter(s.getOutputStream());
		PrintWriter out = new PrintWriter(s.getOutputStream(),true);
		
		//socket输入流读取服务端返回的数据
		BufferedReader bufIn =
				new BufferedReader(new InputStreamReader(s.getInputStream()));
		
		String line = null;
		while((line=bufr.readLine())!=null)
		{
			if("over".equals(line))
				break;
			out.println(line);
			
			//读取服务端发回的数据
			String upperStr = bufIn.readLine();
			System.out.println(upperStr);
		}
		s.close();
	}

}