HOWTO: Using a Java Class with Active Server Pages
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The information in this article applies to:
- Microsoft virtual machine
SUMMARY
This article demonstrates how one can use a Java class as an ActiveX
server side object with Microsoft Active Server Pages (ASP).
MORE INFORMATION
The following steps show how to use a Java Server Object with ASP:
- Install the Microsoft virtual machine (Microsoft VM) (Build 1518
or newer) (Microsoft Visual J++ 1.1 comes with build 1513). You can
check the version of the Msjava.dll in your windows/system or winnt/system32
directory to verify what build of the Microsoft VM you have in your
system. You can download the latest VM from
http://www.microsoft.com/java/
- Create your Java class, which will be created as a COM object. For
example:
// SIMPLE.JAVA-------------
public class Simple
{
public int SimpleFn ( int x )
{
return x * 2;
}
}
- Compile the .java file into a .class file, that is:
jvc simple.java
NOTE: This does not require that you use the Microsoft
compiler for Java, JAVAC works just fine.
- Copy the resulting .class file into the %windir%\java\trustlib or
%windir%\java\lib directory of the server machine. Note that you may
have to restart the Microsoft VM if you copy over a preexisting
class file. To restart the Microsoft VM on the server side go to
Microsoft Internet Service Manager (IIS) and stop and then restart
all three IIS services (that is, www, gopher, ftp).
copy simple.class \winnt\java\trustlib
- Register your Java class as a COM object on the server machine
using the JavaReg utility (available with Visual J++ or the
Microsoft SDK for Java). This can also be done manually or by a
setup program, "javareg/register" is only creating
registry entries:
javareg /register /class:Simple /progid:Simple
The /class: argument is the name of the .class file in your trustlib
or lib directory. The /progid: is the name that you will use in
CreateObject() to create your COM object.
Now your Java class is registered as a COM object and ready to use
from Active Server Pages.
- Create an .asp file in an HTTP shared directory on your computer.
Be sure that the directory the file is in has EXECUTE access. You
can check this in the "Microsoft Internet Service Manager."
A simple ASP file would look like:
SIMPLE.ASP-------------
<html><body>
<h1>Simple Test
</h1>
The result from SIMPLE is:
<% Set SimpleObj = Server.CreateObject("Simple") %>
<% = SimpleObj.SimpleFn(5) %>
<hr>
</body></html>
------------------------
- Open your Web browser and point to YOUR_MACHINE/simple.asp.
REFERENCES
For additional information on how to find the latest Microsoft VM,
please see the following article in the Microsoft Knowledge Base: For
the latest Knowledge Base articles and other support information on
Visual J++ and the SDK for Java, see the following pages on the
Microsoft Technical Support site:
http://support.microsoft.com/support/visualj/
http://support.microsoft.com/support/java/
Additional query words: ASP java server com CreateObject