单例模式的问题

请问，像下面代码在spring项目中，context变量会频繁初始化吗，applicationcontext.xml文件会频繁加载吗，因而过多占用内存吗？
private static final String xml = "applicationcontext.xml";
private static ApplicationContext context;
private static Object getBeanService(String serviceName) {
    Object bean = null;
    try {
        if (context == null) {
            context = new ClassPathXmlApplicationContext(xml);
        //context = SpringApplicationContextUtil.getApplicationContext();
        }
    bean = context.getBean(serviceName);
    } catch (Exception e) {
       e.printStackTrace();
    }
    return bean;
}