ServletContextListener获得spring注入的bean对象

最新推荐文章于 2022-11-25 10:17:22 发布

原创最新推荐文章于 2022-11-25 10:17:22 发布 · 928 阅读

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本文详细介绍了如何实现和应用系统初始化监听器，通过设置CityService实例，并在上下文初始化时获取WebApplicationContext来实现监听功能。

public class SystemInitListener implements ServletContextListener {
    private Logger logger = LoggerFactory.getLogger(getClass());
    private CityService cityService;
    private WebApplicationContext webApplicationContext;

    public void setCityService(CityService cityService) {
        this.cityService = cityService;
    }

    @Override
    public void contextInitialized(ServletContextEvent servletContextEvent) {
        if(null == webApplicationContext){
            webApplicationContext = WebApplicationContextUtils.getWebApplicationContext(servletContextEvent.getServletContext());
            if(null != webApplicationContext){
                cityService = (CityService)webApplicationContext.getBean("cityService");
            }
        }
    }

    @Override
    public void contextDestroyed(ServletContextEvent servletContextEvent) {

    }
}