How can i execute multiple commands with JAVA code?

Question

I need to restart my Tomcat server from Java code. I'm a beginner in Java. I try to do that by cmd. I need to stop tomcat then restart it. I try this code. It works with just two commands (one &&) and it doesn't work if I add a third command (two && in the line exec("cmd /c start cmd.exe ...)).

PS: If another way exists to restart Tomcat with Java code please tell me

public class restart_tomcat {

    public static void main(String[] args) throws SDKException, IOException {
        Runtime rt =  Runtime.getRuntime();

        try {
            // Process process1 = Runtime.getRuntime().exec("cmd /c start cmd.exe /K " + cmd1);
            rt.exec("cmd /c start cmd.exe /K \"cd C:\\\\Program Files (x86)\\\\SAP BusinessObjects\\\\tomcat\\\\bin&&startup.bat\"");
            System.out.println("succesful");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

”i need to restart my tomcat server from java code” - I seriously doubt that. — Bohemian
– Bohemian ♦, Commented Apr 4, 2020 at 22:59

Daniel Vilas-Boas · Accepted Answer · 2020-04-06 13:43:56Z

2

It would be good to know why do you need to start/stop Tomcat from java code, is that a homework or something else? In the real-world, we have initialization scripts that can start/stop it by simply running them from the terminal. You can automate that with a very simple shell script (yourscript.sh) and add the following content:

#!/bin/bash
<path_to_tomcat>/bin/shutdown.sh
<path_to_tomcat>/bin/startup.sh

If you really need to do it from Java code, you may find your answer in one of these resources:

edited Apr 6, 2020 at 13:43

answered Apr 4, 2020 at 22:23

Daniel Vilas-Boas

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4 Comments

nitind Over a year ago

Or something like supervisord.

bahri nada Over a year ago

It is not a homework, in fact i need to restart tomcat in the last step of my script in my project , means after some code, the Tomcat gonna be restarted from Eclipse . i tried the solution in the link but doesn't work.

Daniel Vilas-Boas Over a year ago

just updated the answer @bahrinada. Could you take a look at new resources?

bahri nada Over a year ago

yeah i do, in fact i restart tomcat with java code throught the cmd, thanx to @DanielVilas-Boas for the idea ;)

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