SpringContextHolder使用エラー:アプリケーションContext属性が入力されていません.アプリケーションContext.xmlでSpringContextHolderを定義してください.

**
 *        Spring ApplicationContext,                 ApplicaitonContext.
 */
@Service
@Lazy(false)
public class SpringContextHolder implements ApplicationContextAware, DisposableBean {

    private static ApplicationContext applicationContext = null;

    private static Logger logger = LoggerFactory.getLogger(SpringContextHolder.class);

    /**
     *            ApplicationContext.
     */
    public static ApplicationContext getApplicationContext() {
        assertContextInjected();
        return applicationContext;
    }

    /**
     *      applicationContext   Bean,              .
     */
    @SuppressWarnings("unchecked")
    public static  T getBean(String name) {
        assertContextInjected();
        return (T) applicationContext.getBean(name);
    }

    /**
     *      applicationContext   Bean,              .
     */
    public static  T getBean(Class requiredType) {
        assertContextInjected();
        
        return applicationContext.getBean(requiredType);
    }

    /**
     *   SpringContextHolder  ApplicationContext Null.
     */
    public static void clearHolder() {
        if (logger.isDebugEnabled()) {
            logger.debug("  SpringContextHolder  ApplicationContext:" + applicationContext);
        }
        applicationContext = null;
    }

    /**
     *   ApplicationContextAware  ,   Context      .
     */
    public void setApplicationContext(ApplicationContext applicationContext) {
        SpringContextHolder.applicationContext = applicationContext;
    }

    /**
     *   DisposableBean  ,  Context         .
     */
    public void destroy() throws Exception {
        SpringContextHolder.clearHolder();
    }

    /**
     *   ApplicationContext   .
     */
    private static void assertContextInjected() {
        Validate.validState(applicationContext != null,
                "applicaitonContext     ,   applicationContext.xml   SpringContextHolder.");
    }
}

springbootプロジェクトを起動すると、エラーが表示されます.
起動とロード順序の問題であることが判明し、私の起動クラスが書き間違えました.

public class ProjectApplication {
private UserApiService service =  pringContextHolder.getBean(UserServiceImpl.class);

    @Autowired
    private ConstantProperties constantProperties;


    public static void main(String[] args) {
        SpringApplication.run(ProjectApplication.class, args);
    }

    @PostConstruct
    public  void initData(){

        System.out.println(service==null);
        System.out.println("   "+ constantProperties.getHost()+ "?id=1");
        util.addQuartz(DataTransformJob.class,null,0);
    }

}

 
なぜなら初期化beanがロードされていないからです

private UserApiService service =  pringContextHolder.getBean(UserServiceImpl.class);

     ，        ok