在centos 7上測試了一下，比較簡單粗暴.代碼如下

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.LineNumberReader;

/**

* Created by nicholas on 11/19/2016.

*/

public class GetProcessInfo {

private static final String[] SHELL = {"sh", "-c", "lsof -Pnl +M -i4 | grep sshd"};

private static final String KEY = "(LISTEN)";

private static String runCommand(String[] shell) throws IOException, InterruptedException {

String result = "";

Process pos = Runtime.getRuntime().exec(shell);

pos.waitFor();

InputStreamReader ir = new InputStreamReader(pos.getInputStream());

LineNumberReader input = new LineNumberReader(ir);

String ln = "";

while ((ln = input.readLine()) != null) {

String temp = ln.toString();

if (temp.contains(KEY)) {

result = temp;

}

}

input.close();

ir.close();

return result;

}

public static int getPort() throws IOException, InterruptedException {

String result = runCommand(SHELL);

if ("".equals(result)) {

System.out.println("get sshd services fail....");

return 0;

}

String[] split = result.split(":")[1].split(" ");

int port = Integer.valueOf(split[0]);

return port;

}

public static void main(String[] args) throws IOException, InterruptedException {

System.out.println("sshd port = " + getPort());

}

}

執行結果

總結

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