Need to execute shell script from webapp and display console output in page

Question

I am looking for java examples or library that will help me integrate this into a Struts2/Spring application. Many build systems such as Luntbuild or Hudson have this functionality, I thought I would ask if any one knows of a standalone example before I attempted to dig it out of one of those. I glanced at Quartz job scheduling framework also, but I haven't found the UI hooks yet. Do I just need to read from a file with a JSP include?

Answer 1

If I understand what you are trying to do, this is one way in Java. This executes the ls command and then captures the shell output and writes it back to System.out.

public class TestShell {
    public static void main(String[] args)
    {
        try
        {
                String cmd = "ls\n";
                Process p = Runtime.getRuntime().exec(cmd);
                p.waitFor();
                BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
                while(r.ready()) {
                    System.out.println(r.readLine());
                }

        }
        catch (Throwable t)
                {
                t.printStackTrace();
        }
    }
}