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

Look at this answer on site of spring: http://forum.springsource.org/showthread.php?60983-Autowiring-the-servlet-filter

In brief - you can manually force spring to apply @Autowire annotation to your filter:

public void init(FilterConfig filterConfig) throws ServletException {

    ServletContext servletContext = filterConfig.getServletContext();
    WebApplicationContext webApplicationContext = 
            WebApplicationContextUtils.getWebApplicationContext(servletContext);

    AutowireCapableBeanFactory autowireCapableBeanFactory =
           webApplicationContext.getAutowireCapableBeanFactory();

    autowireCapableBeanFactory.configureBean(this, BEAN_NAME);
}