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SpringContextHolder代码如下：没有问题

**
 * 以静态变量保存Spring ApplicationContext, 可在任何代码任何地方任何时候取出ApplicaitonContext.
 */
@Service
@Lazy(false)
public class SpringContextHolder implements ApplicationContextAware, DisposableBean {

    private static ApplicationContext applicationContext = null;

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

    /**
     * 取得存储在静态变量中的ApplicationContext.
     */
    public static ApplicationContext getApplicationContext() {
        assertContextInjected();
        return applicationContext;
    }

    /**
     * 从静态变量applicationContext中取得Bean, 自动转型为所赋值对象的类型.
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) {
        assertContextInjected();
        return (T) applicationContext.getBean(name);
    }

    /**
     * 从静态变量applicationContext中取得Bean, 自动转型为所赋值对象的类型.
     */
    public static <T> T getBean(Class<T> requiredType) {
        assertContextInjected();
        
        return applicationContext.getBean(requiredType);
    }

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

    /**
     * 实现ApplicationContextAware接口, 注入Context到静态变量中.
     */
    public void setApplicationContext(ApplicationContext applicationContext) {
        SpringContextHolder.applicationContext = applicationContext;
    }

    /**
     * 实现DisposableBean接口, 在Context关闭时清理静态变量.
     */
    public void destroy() throws Exception {
        SpringContextHolder.clearHolder();
    }

    /**
     * 检查ApplicationContext不为空.
     */
    private static void assertContextInjected() {
        Validate.validState(applicationContext != null,
                "applicaitonContext属性未注入, 请在applicationContext.xml中定义SpringContextHolder.");
    }
}

启动springboot项目就是报错如题

经查发现是启动及加载顺序的问题，我的启动类写错了

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("初始化"+ constantProperties.getHost()+ "?id=1");
        util.addQuartz(DataTransformJob.class,null,0);
    }

}

原因就在于还没有加载初始化bean就用了

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

删掉该代码，在程序中应用启动ok