Java里Ping DNS的多种方式汇总

Java里Ping DNS的多种方式汇总，不多说直接代码。

package com.jvwl.rds.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.util.Arrays;
import java.util.List;

import org.testng.annotations.Test;

import lombok.extern.slf4j.Slf4j;

/**
 * Created by jervalj on 2018-09-12
 */
@Slf4j
public class PingDnsAndPort {

    @Test
    public void PingDnsWithCommand() {
        String dns = "www.hao123.com";
        Runtime runtime = Runtime.getRuntime();
        BufferedReader bufferedReader = null;
        boolean result = false;
        try {
            String command = "ping " + dns;
            log.info("CMD: {}", command);
            Process process = runtime.exec(command);
            bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line = null;
            while (null != (line = bufferedReader.readLine())) {
                if (!result && line.contains("TTL")) {
                    result = true;
                }
                log.info(line);
            }
            if (result) {
                log.info("Ping {} successful!", dns);
            } else {
                log.info("Ping {} failed!", dns);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (null != bufferedReader) {
                try {
                    bufferedReader.close();
                } catch (IOException e) {
                }
            }
        }
        log.info("---Done----");
    }

    @Test
    public void PingDnsWithJavaApi() {
        String dns = "www.hao123.com";
        try {
            InetAddress inetAddress = InetAddress.getByName(dns);
            if (inetAddress instanceof Inet4Address) {
                log.info("{} is ipv4", dns);
            } else if (inetAddress instanceof Inet6Address) {
                log.info("{} is ipv6", dns);
            } else {
                log.info("{} is unknown type", dns);
            }
            log.info("HostName:{}", inetAddress.getHostName());
            log.info("HostAddress:{}", inetAddress.getHostAddress());
            int timeout = 6000;
            log.info("InetAddress isReachable:{}", inetAddress.isReachable(timeout));
            log.info("Full InetAddress:{}", inetAddress.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    @Test
    public void PingDnsAndPortWithSocket() {
        String dns = "fca-vm-hc-prod-jb6-rds-g1i1.hyvesolutions.org";
        int port = 4447;
        Socket socket = new Socket();
        InetSocketAddress inetSocketAddress = new InetSocketAddress(dns, port);
        boolean result = false;
        try {
            socket.connect(inetSocketAddress);
            result = true;
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                socket.close();
            } catch (IOException e) {
            }
        }
        if (result) {
            log.info("Ping {} successful!", dns);
        } else {
            log.info("Ping {} failed!", dns);
        }
    }

    @Test
    public void PingDnsAndPortWithSocketByBatch() {
        List<String> dnsList = Arrays.asList("fca-vm-uat-jboss6-rds-g1i1", "ton-vm-uat-jboss6-rds-g1i8", "ton-vm-prod-jboss6-rds-g1i1");
        int port = 4447;
        for (String dns:dnsList) {
            Socket socket = new Socket();
            InetSocketAddress inetSocketAddress = new InetSocketAddress(dns, port);
            boolean result = false;
            try {
                socket.connect(inetSocketAddress);
                result = true;
            } catch (IOException e) {
            } finally {
                try {
                    socket.close();
                } catch (IOException e) {
                }
            }
            if (result) {
                log.info("Ping {} successful!", dns);
            } else {
                log.info("Ping {} failed!", dns);
            }
        }
    }
}

 

转载于:https://my.oschina.net/jerval/blog/2051437