java测试网络能ping通和telnet通-向日葵屋

java测试网络能ping通和telnet通

package com.test;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
public class Test {
    public static void main(String[] args) {
        ping("114.114.114.114");
        //本地端口可以通过ipconfig查询
        telnet("10.xx.xx.120", "10.xx.xx.155", 22, 5000);
    }
    /**
     * 测试网络连通性
     * @date 2022/8/17 9:32
     */
    private static boolean ping(String ip) {
        try {
            InetAddress address = InetAddress.getByName(ip);
            // if (address instanceof java.net.Inet4Address) {
            //     System.out.println(ip + " ipv4地址");
            // } else if (address instanceof java.net.Inet6Address) {
            //     System.out.println(ip + " ipv6地址");
            // }
            if (address.isReachable(5000)) {
                System.out.println("成功 - ping " + ip);
                return true;
            } else {
                System.out.println("失败 - ping " + ip);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }
    /**
     * 测试端口连通性
     * @param localHost  远程ip
     * @param remoteHost 远程ip
     * @param remotePort 远程端口
     * @param timeout    超时时间，毫秒
     * @date 2022/8/17 9:51
     */
    private static boolean telnet(String localHost, String remoteHost, int remotePort, int timeout) {
        Socket socket = null;
        try {
            InetAddress localInetAddr = InetAddress.getByName(localHost);
            InetAddress remoteInetAddr = InetAddress.getByName(remoteHost);
            socket = new Socket();
            // 端口号设置为 0 表示在本地挑选一个可用端口进行连接，这里也可以改成自己想要测试的本地端口
            SocketAddress localSocketAddr = new InetSocketAddress(localInetAddr, 0);
            socket.bind(localSocketAddr);
            InetSocketAddress endpointSocketAddr = new InetSocketAddress(remoteInetAddr, remotePort);
            socket.connect(endpointSocketAddr, timeout);
            System.out.println("成功 - telnet " + remoteHost + " " + remotePort);
            return true;
        } catch (IOException e) {
            System.out.println("失败 - telnet " + remoteHost + " " + remotePort);
            e.printStackTrace();
        } finally {
            if (socket != null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return false;
    }
}