spring - How to load jar file in Java project as a dependency programatically -

in jar:

class {getter setter} 

in war:(load above jar runtime)

class b {a a=new a()} 

problem :

now actual problem when deploy war without adding jar dependency (in pom), want pick jar local sys folder when deploy war.

i tried urlclassloader, problem here able load classes jar, still class a unable resolve.