java获取ServletContextListener上的spring应用程序上下文

Question

我试图在ServletContextListener上获取spring应用程序上下文。我正在使用带注释配置的Spring。使用这段代码，我得到了“contextnull”。我做错了什么

@WebListener
public class Initializer implements ServletContextListener
{   
    public void contextInitialized(ServletContextEvent event)
    {
        System.out.println("context " + WebApplicationContextUtils.getWebApplicationContext(event.getServletContext()));
    }

    @Override
    public void contextDestroyed(ServletContextEvent sce)
    {
    }
}

谢谢

Answer 1

解决此问题的关键是删除注释@WebListener和WebAppInitializer覆盖onStartup，以确保ContextLoaderListener在Initializer之前加载

public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer
{
.
.
.
    @Override
    public void onStartup(ServletContext container) throws ServletException
    {
        super.onStartup(container);
        container.addListener(Initializer.class);
    }
}