How to run PING command and get ping host summary?

问题:

Hi I need to execute the PING command using Java code and get summary of the ping host. How to do it in Java?

回答1:

as viralpatel specified you can use Runtime.exec()

following is an example of it

class pingTest {

    public static void main(String[] args) {
        String ip = "127.0.0.1";
        String pingResult = "";

        String pingCmd = "ping " + ip;
        try {
            Runtime r = Runtime.getRuntime();
            Process p = r.exec(pingCmd);

            BufferedReader in = new BufferedReader(new
            InputStreamReader(p.getInputStream()));
            String inputLine;
            while ((inputLine = in.readLine()) != null) {
                System.out.println(inputLine);
                pingResult += inputLine;
            }
            in.close();

        } catch (IOException e) {
            System.out.println(e);
        }

    }
}

output

Pinging 127.0.0.1 with 32 bytes of data:
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128

Ping statistics for 127.0.0.1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

refer http://www.velocityreviews.com/forums/t146589-ping-class-java.html

回答2:

InetAddress class has a method which uses ECMP Echo Request (aka ping) to determine the hosts availability.

String ipAddress = "192.168.1.10";
InetAddress inet = InetAddress.getByName(ipAddress);
boolean reachable = inet.isReachable(5000);

If the above reachable variable is true, then it means that the host has properly answered with ECMP Echo Reply (aka pong) within given time (in millis).

Note: Not all implementations have to use ping. The documentation states that:

A typical implementation will use ICMP ECHO REQUESTs if the privilege can be obtained, otherwise it will try to establish a TCP connection on port 7 (Echo) of the destination host.

Therefore the method can be used to check hosts availability, but it can not universally be used to check for ping-based checks.

回答3:

Check out this ping library for java I'm making:

http://code.google.com/p/jpingy/

Maybe it can help

回答4:

Below code will work on both Windows and Linux system,

public static boolean isReachable(String url) throws MalformedURLException {
        if (!url.contains("http") && !url.contains("https")) {
            url = "http://" + url;
        }
        URL urlObj = new URL(url);
        url = urlObj.getHost();
        url = "ping " + url;
        try {
            Process p = Runtime.getRuntime().exec(url);
            BufferedReader inputStream = new BufferedReader(
                    new InputStreamReader(p.getInputStream()));
            String s = "";
            while ((s = inputStream.readLine()) != null) {
                if (s.contains("Packets: Sent") || s.contains("bytes of data")) {
                    return true;
                }
            }
            return false;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }