我有以下代码，我以这个答案为模型：

public class DeployerServlet extends HttpServlet {
    @Resource
    Engine engine;

    public void init(ServletConfig config) throws ServletException {
        super.init(config);
        SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this, config.getServletContext());
    }

    // ...
}

但是，servlet甚至没有正确实例化。创建实例时，Tomcat会尝试com.example.DeployerServlet/engine在JNDI中查找名称，这会导致异常，

SEVERE: Allocate exception for servlet Deploy Servlet
javax.naming.NameNotFoundException: Name com.example.DeployerServlet is not bound in this Context

那么，将Spring bean注入servlet的推荐方法是什么？