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I have one java file named app.java which extracts the servers in my application . I need to connect to every server in that list and extract the logs . In loop , I have to call script for connecting to every machine . Is it possible to call shell script from java file ? Any suggestions please .

Here I am adding sample example .

for (int m = 0; m < AppDetailsN.length(); ++m)
                    {
                        JSONObject AppUsernIP=AppDetailsN.getJSONObject(m));
                        Iterator keys = AppUsernIP.keys();
                        while(keys.hasNext()) {
                        String key = (String)keys.next();
                        System.out.println("key:"+key);
                        String value = (String)AppUsernIP.get(key);
                        System.out.println("value "+value);
                        if(key == "user")
                                  //store value to user variable
                        if (key == "ip")
                                  //store value to IP variable 
             }
  //Here I want to call the script with that username and IP and password 
}
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1 Answer 1

up vote 0 down vote

You could use Runtime.exec(). Here is a very simple example:

import java.io.*;
import java.util.*;

class Foo {
    public static void main(String[] args) throws Exception {
        // Run command and wait till it's done
        Process p = Runtime.getRuntime().exec("ping -n 3 www.google.de");
        p.waitFor();

        // Grab output and print to display
        BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));

        String line = "";
        while ((line = reader.readLine()) != null) {
            System.out.println(line);
        }
    }
}
share|improve this answer
    
instead of "ping -n 3 www.google.de" I gave "sshpass -p xxx ssh -o StrictHostKeyChecking=no UN@IP 'mkdir check'" .. But it is not working – Vidya Oct 20 at 7:23
    
Does the sshpass require any interaction from the user? I never used it before, sorry. Keep in mind that my code snippet does not work with shell commands that require interation with the user. It runs a program that finishes by itself and prints the output. – ap0 Oct 20 at 7:32
    
yes . Because it is remote machine. – Vidya Oct 20 at 7:50
    
Then maybe JSch is more of something that you are looking for. I don't have any expirience with it, sorry. – ap0 Oct 20 at 8:05

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