Spring 与 class.forname()

Question

If an application is managed by the Spring container, can a developer still use class.forName() to create an instance of a particular class? Or will that violate the Spring container and result in some exception?

Answer 1

Yes you can use it. The resulting object will not be managed by Spring, however.

Answer 2

If you are developing a web-application and assuming you have beans defined in applicationContext.xml then you can use:

ApplicationContext applicationContext = WebApplicationContextUtils.getWebApplicationContext(getServletContext());        
AnyBean anyBean = (AnyBean) applicationContext.getBean("anyBean");

where anyBean is the id of the bean defined in that xml. Though it will not create a new instance rather it will return an instance.

Also you can create bean programmatically and can register to the context:

GenericWebApplicationContext context = new GenericWebApplicationContext();
RootBeanDefinition anyBean = new RootBeanDefinition(AnyBean.class);
context.registerBeanDefinition("anyBean",anyBean);

Hope this will give the answer to your question. Thanks.