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Executing notepad in jsp (WIndows 2000)

843835Nov 22 2002 — edited Nov 26 2002
Hey,

I've been playing around with the Runtime API and have run into problem. I want to eventually run a C program through a JSP page, but I can't even get notepad to open successfully. Below is the entire test code that is supposed to open notepad. When I open this JSP page in Windows 2000, nothing happens. The GUI for notepad is never opened. However, I checked the task manager and there is an instance of notepad there, and when I try to end the process it gives me an error saying that access is denied. I wrote a simple java program with similar code, and I am able to successfully open notepad through it. I can't see what I'm doing wrong here. Anyone else have this problem on Windows 2000? Thanks.

<%@ page import="java.io.*" %>
<%
Runtime r = Runtime.getRuntime();
try {
Process p = r.exec("notepad");
} catch (Exception e) {
System.out.println("Error");
}
%>
<html>
...html code...
</html>

Jason

Comments

843835
I've finally determined the cause of all my troubles. It turns out that if Tomcat is running as a service on Windows 2000, it can't access the console and as a result it can't call external programs. I turned off the service temporarily and started up the stand-alone Tomcat application and my JSP pages work without a hitch. Unfortunately, I think they'll want to keep Tomcat as a service, so I haven't completely solved all of my problems. So does anyone know of a way to execute external programs using Runtime.exec() while running Tomcat as a service? Thanks.

Jason
843835
the notepad called by your jsp is the NOTEPAD program under the server part,

so ,under client part , there will be no response, because the logic process of the jsp is disposed under server part.

BUT
how to call a native function of client part under Browser/Server structure ?
i don't know, for example: in an web page (jsp / servlet / applet) to call the
"Outlook Express\\msimn.exe" , which is useful in many B/S applications.
This puzzled me a lot.

Hope some one can give an answer.
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Locked on Dec 24 2002
Added on Nov 22 2002
#javaserver-pages-jsp-and-jstl
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