spring autowiring not working from a non-spring managed class

Question

I have a class (Class ABC) that's instantiated by calling the constructor. Class ABC in turn has a helper class (Class XYZ) injected using auto-wired.

Ours is a Spring MVC based application and I don't see any exception while server start-up.

But I still see Class XYZ coming as null. Is it because of the fact that Class ABC is not instantiated by Spring Container?

In such scenarios, how do i make use of auto-wiring?

Thanks.

Answer 1

You can use this way to use spring bean in non-spring bean class

import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class ApplicationContextUtils implements ApplicationContextAware {
     
      private static ApplicationContext ctx;
     
      @Override
      public void setApplicationContext(ApplicationContext appContext) {
        ctx = appContext;
      }
     
      public static ApplicationContext getApplicationContext() {
        return ctx;
      }
}

now you can get the applicationcontext object by getApplicationContext() this method.

from applicationcontext you can get spring bean objects like this:

ApplicationContext appCtx = ApplicationContextUtils.getApplicationContext();
String strFromContext = appCtx.getBean(beanName, String.class);