使用java建立基于socket的c/s接收系统

//运行时输入端口

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketAddress;

public class TCPEchoServer
{

	/**
	 * @param args
	 */
	private static final int BUFSIZE = 32;


	public static void main(String[] args) throws IOException
	{


		if (args.length != 1)//获取启动服务的端口
			throw new IllegalArgumentException("Parameter(s): <Port>");

		int servPort = Integer.parseInt(args[0]);

		//分配一个端口用于启动server端
		ServerSocket servSock = new ServerSocket(servPort);

		int recvMsgSize;
		byte[] receiveBuf = new byte[BUFSIZE];

		while (1)
		{
			Socket clntSock = servSock.accept(); //接收客户端的主动连接

			SocketAddress clientAddress = clntSock.getRemoteSocketAddress();
			System.out.println("Handling client at " + clientAddress);

			InputStream in = clntSock.getInputStream();
			OutputStream out = clntSock.getOutputStream();

			while ((recvMsgSize = in.read(receiveBuf)) != -1)
			{
				out.write(receiveBuf, 0, recvMsgSize);
			}
			clntSock.close();
		}

	}

}

运行java TCPEchoServer 8001
8001为端口号

//运行时输入 连接地址 字符 端口

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.net.SocketException;

public class TCPEchoClient
{

	public static void main(String[] args) throws IOException
	{

		if ((args.length < 2) || (args.length > 3)) // 传入的数据在2~3之间，0：地址 1：传输字符 <2：端口>
		 throw new IllegalArgumentException("Parameter(s): <Server> <Word> [<Port>]");
			
			 String server = args[0]; // ip地址或主机名称

			 byte[] data = args[1].getBytes();
			
			 int servPort = (args.length == 3) ? Integer.parseInt(args[2]) : 7;//默认端口为7
			
			 Socket socket = new Socket(server, servPort);
			 System.out.println("Connected to server...sending echo string");
		
			 InputStream in = socket.getInputStream();
			 OutputStream out = socket.getOutputStream();
			
			 out.write(data); 
			
			 int totalBytesRcvd = 0; 
			 int bytesRcvd; 
			 while (totalBytesRcvd < data.length) {
			 if ((bytesRcvd = in.read(data, totalBytesRcvd,data.length - totalBytesRcvd)) == -1)
			 throw new SocketException("Connection closed prematurely");
			 totalBytesRcvd += bytesRcvd;
			 }
			
			 System.out.println("Received: " + new String(data));
		
			 socket.close(); 
		
		
		
	}
}

运行java TCPEchoClient 172.0.0.1 "quan" 8001
172.0.0.1为启动服务的ip
"quan"为传输的字符
8001为启动服务的端口




在cs系统中client连接server需要sap<ip:port>