Java代码建立TCP连接

import java.io.IOException;import java.io.OutputStream;import java.net.Socket;import java.net.UnknownHostException;public class TCPClientDemo {    /**     * @param args     * @throws IOException      * @throws UnknownHostException      */    public static void main(String[] args) throws UnknownHostException, IOException {        // TODO Auto-generated method stub        //1.建立TCP连接  1）IP地址，2) 端口号         String ip="192.168.187.129";         int port=554;         Socket sck=new Socket(ip,port);         //2、传输内容          String content="这是一个JAVA模拟客户端-10000";         byte[] bstream=content.getBytes("GBK");//字节流，中文所以选择GBK         OutputStream os=sck.getOutputStream();         os.write(bstream);         //3、关闭TCP连接         sck.close();    }}