How to load JAR files dynamically at Runtime?

Question

Why is it so hard to do this in Java? If you want to have any kind of module system you need to be able to load JAR files dynamically. I\'m told there\'s a way of doing it b

Answer 1

The solution proposed by jodonnell is good but should be a little bit enhanced. I used this post to develop my application with success.

Assign the current thread

Firstly we have to add

Thread.currentThread().setContextClassLoader(classLoader);

or you will not able to load resource (such as spring/context.xml) stored into the jar.

Do not include

your jars into the parent class loader or you will not able to understand who is loading what.

see also Problem reloading a jar using URLClassLoader

However, OSGi framework remain the best way.