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How Add new classess to the System Classs loader.

echarish Kumar
Ranch Hand

Joined: Feb 02, 2010
Posts: 42
I want to develope a jsp page which should take a JAR file as an input and then add all the classess in that jar to to the System Class Loader. it should be such that once loaded these classess should be availabele to the whole system wihout needing to load the classess from the jar.

I have created a URLClassLoader

public static URLClassLoader getURLClassLoader(URL jarURL) {
return new URLClassLoader(new URL[] { jarURL }, ExternalJarUtils.class.getClassLoader());}
=========================================================
and here i am loadining the class.
------------------------------------
urlLoader = ExternalJarUtils.getURLClassLoader(new URL("file",url, jarName));
aClass = Class.forName(jobClass, true, urlLoader);
========================================

The PROBLEM IS EVERY TIME I NEED THIS CLASS I HAVE TO READ THE JAR. which is not possible in my sitiution.

I will really appriciate any help regarding this.
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 39045
    
  23
Welcome to the Ranch

I am afraid your question is too difficult for "beginning Java", soI shall move it.
 
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subject: How Add new classess to the System Classs loader.