Using some beans in Filter bean class?

Question

In my filter bean class, I added some beans dependency (with @Autowired annotation). But in the method doFilter(), all my dependency beans have nul

Answer 1

I was getting null pointer while accessing service class bean in filter class using Autowiring . I searched more than 100 links but not able to find solution. I am using spring Boot Application and configuration which is required to get bean in filter class :

FilterConfig.java which provides application context Object.

@Component
public class FilterConfig  implements ApplicationContextAware{

private static ApplicationContext context;


public static ApplicationContext getApplicationContext() {
       return context;
    }
public  static  T getBean(String name,Class aClass){
    return context.getBean(name,aClass);
}

@Override
public void setApplicationContext(ApplicationContext ctx) throws BeansException {
    context = ctx;
}   

 }

in Filter class , I used this like :

 UserService userService =FilterConfig.getBean("UserService", UserService.class);

UserService this is bean name which is mentioned in

  @Service("UserService")
  public class UserServiceImpl implements UserService { ...}

No Configuration in main class of spring Boot :SpringBootServletInitializer