客户端socket调用

import java.net.Socket;
import java.io.*;
import java.util.Scanner;
import java.util.regex.Pattern;
import java.util.regex.Matcher;

class SocketTest
{
    public static void main(String[] args) 
    {        
        Scanner sc=new Scanner(System.in);
        System.out.println("please input ipaddress:");
        boolean isIp=false;
        String strIp="";
        //ip正则匹配
        Pattern pattern=Pattern.compile("((?:(?:25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d)))\.){3}(?:25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d))))");
        while(!isIp){
        //System.out.println(isIp);    
        strIp=sc.next();        
        Matcher matcher=pattern.matcher(strIp);
        //如果输入的数据满足ip格式，继续运行
        if(matcher.matches()){
            isIp=true;
            }
            else{
                System.out.println("the ip is wrong,please input again:");
            }
        }            
        int port=80;
        boolean isNu=false;
        //如果输入的为正确的端口号（整数）继续运行
        while(!isNu){
        try{
            System.out.println("please input port");
            String strPort=sc.next();
            port=Integer.parseInt(strPort);
            isNu=true;
            }catch(Exception ex){
                System.out.println("is not int ,please input agein:");
            }
        }

        System.out.println("the ip is :"+strIp);
        System.out.println("the port is :"+port);
        if(strIp!=null&&strIp.length()>0){
            try{
                //通过ip和端口创建socket实例
                Socket socket=new Socket(strIp,port);
                //获取socket的输出流
                OutputStream  outputStream=socket.getOutputStream();
                //讲http请求头信息输入至socket输出流中
                PrintWriter out=new PrintWriter(outputStream,true);
                out.println("GET / HTTP/1.1");  //get 请求，获取目录为/ http协议为http 1.1
                out.println("Host: localhost:8888");
                out.println("Connection: Close");
                out.println();
                //接收服务端返回的数据流
                BufferedReader in=new BufferedReader(new InputStreamReader(socket.getInputStream()));
                boolean loop=true;
                StringBuffer sb=new StringBuffer(8096);
                while(loop){
                    if ( in.ready() ) {
                        int i=0;
                        while (i!=-1) {
                            i = in.read();
                            sb.append((char) i);
                        }
                    loop = false;
                    Thread.currentThread().sleep(50);
                    }
                }
                System.out.println(sb.toString());
                socket.close();
            }
                catch (Exception ex) {
                    ex.printStackTrace();
                    System.out.println(ex.toString());
            }
        }
    }
}