Question

I’m really not sure where to start with this because I am extremely new at Spring.

Currently I am instantiating a class like normal,

ClassImpl newImpl = new ClassImpl();

I want to do this through Spring’s context.xml – so I’ve loaded the class as a bean-

<bean id="ClassId" class="ClassImpl"></bean>

How do I know instantiate ClassImpl by taking advantage of the fact that I have passed it in as a bean? That is, how do I give newImpl a new ClassImpl by making Spring inject it in?

Answer 1

You’d do something like:

ApplicationContext ctx = new ClassPathXmlApplicationContext("classpath:" + [package_name/context.xml]);
ClassImpl newImpl = (ClassImpl) ctx.getBean("ClassId")

If you’re loading it from a context.xml outside your project, I believe you can do

ApplicationContext ctx = new FileSystemXmlApplicationContext(path_to_context.xml);
ClassImpl newImpl = (ClassImpl) ctx.getBean("ClassId")