package com.jdpowercharge.beans;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.SocketTimeoutException;
import java.net.UnknownHostException;

public class TestNet {
public static void main(String[] args) throws IOException {
//域名ip都可以
connect(“www.baidu.com”, 8081);
}

	private static void connect(String server, int servPort) throws IOException {

		        InetAddress ad;
				try {
					ad = InetAddress.getByName(server);
					 boolean state = ad.isReachable(1000);//测试是否可以达到该地址 ,判断ip是否可以连接 1000是超时时间
				
					 if(state){
				           System.out.println("连接成功" + ad.getHostAddress());
				        } else{
				           System.out.println("连接失败");
				          
				           //throw new IOException();
				        }
				
				
				} catch (UnknownHostException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
		       
		        
		        //1.创建一个Socket实例：构造函数向指定的远程主机和端口建立一个TCP连接
		        //socket = new Socket(server, servPort);
		    /*    Socket socket = new Socket();
		        socket.setReceiveBufferSize(8192);
		        socket.setSoTimeout(1000);// socket.setSoTimeout(2000);
		        SocketAddress address = new InetSocketAddress(server, servPort);
		        try {
		            socket.connect(address,1000);//1.判断ip、端口是否可连接
		        } catch (IOException e) {
		            System.out.println("新建一个 socket server "+ servPort+"连接失败");
		            throw new IOException();
		        } 
		        System.out.println("新建一个socket");
		        System.out.println("Connected to server... sending echo string");
		        //2. 通过套接字的输入输出流进行通信：一个Socket连接实例包括一个InputStream和一个OutputStream，它们的用法同于其他Java输入输出流。
		        InputStream  in = socket.getInputStream();
		        OutputStream out = socket.getOutputStream();
		        isalreadyconnected=1;
		        //connect1( server,  servPort) ;

*/ }

}