Java TCP入门例子

package com.iboxpay.tcp;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class TcpServer {
	public static void main(String[] args) throws IOException {
		BufferedReader buffer = null;
		ServerSocket server= null;
		Socket s = null;
		InputStream is = null;
		OutputStream os  = null;
		DataOutputStream dos = null;
		try {
			server = new ServerSocket(8080);
			s = server.accept();
			is = s.getInputStream();
			os = s.getOutputStream();
			
			System.out.println("-----------welcome to tcp socket-------");
			buffer = new BufferedReader(new InputStreamReader(is));
			
			dos = new DataOutputStream(os);

			System.out.println(buffer.readLine());//输出
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			buffer.close();
			os.close();
			is.close();
			s.close();
			server.close();
		}
	}
}

package com.iboxpay.tcp;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;

public class TcpClient{
	public static void main(String[] args) {
		 String[] str = {"172.30.5.58","8080"};
		 try {
			client(str);
		} catch (IOException e) {
			e.printStackTrace();
		}
	} 
	public static void client(String[] str) throws IOException{
		Socket s = null;
		InputStream ips = null;
		OutputStream ops = null;
		BufferedReader brKey  = null;
		DataOutputStream dos = null;
		BufferedReader brNet  = null;
		try  
		{  
			//Socket s=new Socket(InetAddress.getByName("192.168.0.213"),8001);  
			if(str.length < 2)  
			{  
				System.out.println("Usage:java TcpClient ServerIP ServerPort");  
				return;  
			}  
			//建立Socket  
			s =new Socket(InetAddress.getByName(str[0]),Integer.parseInt(str[1]));  
			ips =s.getInputStream();  
			ops =s.getOutputStream();  
			
			dos = new DataOutputStream(ops);  
			brNet = new BufferedReader(new InputStreamReader(ips));  
			
			while(true)  
			{  
				brKey = new BufferedReader(new InputStreamReader(System.in));//键盘输入  
				String strWord = brKey.readLine();  
				dos.writeBytes(strWord + System.getProperty("line.separator"));  
				if(strWord.equalsIgnoreCase("quit"))  
					break;  
			}  
		}catch(Exception e){
			e.printStackTrace();
		} finally{
			dos.close();  
			brNet.close();  
			brKey.close();  
			s.close();  
		}
	}
}