package com.test.util;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;public class PingUtils {
    public static boolean ping(String ip, int pingTimes, int timeOut) {        BufferedReader in = null;        String pingCommand = null;                Runtime r = Runtime.getRuntime();        String osName = System.getProperty("os.name");        System.out.println(osName);        if(osName.contains("Windows")) {            //-n:要发送的回显请求数   -w：每次请求的超时时间            pingCommand = "ping " + ip + " -n " + pingTimes + " -w " + timeOut;        }else {            //linux下： -c是要发送的回显请求数，没有每次请求超时时间            pingCommand = "ping " + " -c " + pingTimes + " " + ip;        }        try {            Process p = r.exec(pingCommand);            if(p == null) {                return false;            } 　　　　　　　//ping命令使用的是GBK编码            in = new BufferedReader(new InputStreamReader(p.getInputStream(),"GBK"));            int connectCount = 0;            String line = null;            while((line = in.readLine()) != null) {                connectCount += getCheckResult(line,osName);            }            System.out.println(connectCount);                        //只要ping通一次就说明连接成功？            return connectCount > 0 ;        } catch(Exception e) {            e.printStackTrace();            logger.error("连接设备状态失败：" + e.getMessage());            return false;        } finally {            try {                in.close();            } catch (IOException e) {                logger.error(e.getMessage());            }        }    }        //若含有ttl=64字样,说明已经ping通,返回1,否則返回0.    private static int getCheckResult(String line, String osName) {        if(osName.contains("Windows")) {            if(line.contains("TTL")) {                return 1;            }        }else {            if(line.contains("ttl")) {                return 1;            }        }        return 0;    }        //    public static void main(String[] args) {//        ping("127.0.0.1", 4 , 1000);//        //    }    }

 

根据IP地址和端口号PING

package com.zit.util;import java.io.IOException;import java.net.InetSocketAddress;import java.net.Socket;import java.net.SocketTimeoutException;import java.net.UnknownHostException;import org.apache.log4j.Logger;public class PingUtil {    private static Logger logger = Logger.getLogger(PingUtil.class);            public synchronized static boolean ping(String host, int port, int timeOut) {        boolean flag = false;        Socket socket = null;        try {            socket = new Socket();            socket.connect(new InetSocketAddress(host.trim(), port), timeOut);            flag = true;        } catch (UnknownHostException e) {            System.out.println(flag);            e.printStackTrace();            return false;        } catch (SocketTimeoutException e) {            System.out.println(flag);            e.printStackTrace();            return false;        } catch (IOException e) {            System.out.println(flag);            e.printStackTrace();            return false;        } catch(Exception e) {            System.out.println(flag);            e.printStackTrace();            logger.error("Connect device failed：" + e.getMessage());            return false;        } finally {            try {                if (socket != null) {                    socket.close();                }            }            catch (Exception e) {            }        }        System.out.println(flag);        return flag;    }                public static void main(String[] args) {        ping("10.86.31.47", 80 , 3000);            }    }