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());
             }
         }
     }
 }