java - Spring injection Into Servlet - Stack Overflow

I created a parent abstract servlet class that retrieves the Spring context, gets and autowiring-capable factory and uses that factory to autowire the servlet instances (the subclasess, actually). I also store the factory as an instance variable in case the subclasses need it.

So the parent abstract servlet looks like this:

public abstract class AbstractServlet extends HttpServlet {

protected AutowireCapableBeanFactory ctx;

@Override
public void init() throws ServletException {
    super.init();
    ctx = ((ApplicationContext) getServletContext().getAttribute(
            "applicationContext")).getAutowireCapableBeanFactory();
    //The following line does the magic
    ctx.autowireBean(this);

}

}

It's best to load the application context with Spring's own context listener like this:

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

Then retrieve it like this:

    WebApplicationContext context = WebApplicationContextUtils
            .getWebApplicationContext(getServletContext());
    ctx = context.getAutowireCapableBeanFactory();
    ctx.autowireBean(this);

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