@PropertySource和@Value在ServletContextListener中不起作用

Question

我有码头服务器和弹簧靴。
我上课了：

@WebListener
@ManagedBean
@Configuration
@PropertySource("file:/etc/koshka/newlps.properties")
public class IasContextListener implements ServletContextListener 
{
    private final Logger logger = 
        LogManager.getLogger(IasContextListener.class.getName());

    @Value("${mongo.host}")
    private String host;

    @Value("${mongo.port}")
    private Integer port;

    @Override
    public void contextDestroyed(ServletContextEvent sce) 
    {
        MongoClient mongo = 
            (MongoClient) sce.getServletContext()
                        .getAttribute(Constants.COMMON.MONGO_CLIENT);

        mongo.close();
        logger.info("MongoClient closed successfully");
    }

    @Override
    public void contextInitialized(ServletContextEvent sce) 
    {
        logger.info(String.format("Mongo host: %s\tport: %d", host, port));
        MongoClient mongo = new MongoClient(host, port);

        logger.info("MongoClient initialized successfully");
        sce
            .getServletContext()
            .setAttribute(Constants.COMMON.MONGO_CLIENT, mongo);
    }
}

当我通过spring-boot调试运行时，contextInitialized函数中的主机和端口不为空，但是当我部署到Jetty9服务器时，由于空值，该函数在MongoClient mongo = new MongoClient(host, port);上失败了。