SpringContextHolder使用報錯：applicaitonContext屬性未注入, 請在applicationContext.xml中定義SpringContextHolder

SpringContextHolder代碼如下：沒有問題

**
 * 以靜態變量保存Spring ApplicationContext, 可在任何代碼任何地方任何時候取出ApplicaitonContext.
 */
@Service
@Lazy(false)
public class SpringContextHolder implements ApplicationContextAware, DisposableBean {

    private static ApplicationContext applicationContext = null;

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

    /**
     * 取得存儲在靜態變量中的ApplicationContext.
     */
    public static ApplicationContext getApplicationContext() {
        assertContextInjected();
        return applicationContext;
    }

    /**
     * 從靜態變量applicationContext中取得Bean, 自動轉型為所賦值對象的類型.
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) {
        assertContextInjected();
        return (T) applicationContext.getBean(name);
    }

    /**
     * 從靜態變量applicationContext中取得Bean, 自動轉型為所賦值對象的類型.
     */
    public static <T> T getBean(Class<T> requiredType) {
        assertContextInjected();
        
        return applicationContext.getBean(requiredType);
    }

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

    /**
     * 實現ApplicationContextAware接口, 注入Context到靜態變量中.
     */
    public void setApplicationContext(ApplicationContext applicationContext) {
        SpringContextHolder.applicationContext = applicationContext;
    }

    /**
     * 實現DisposableBean接口, 在Context關閉時清理靜態變量.
     */
    public void destroy() throws Exception {
        SpringContextHolder.clearHolder();
    }

    /**
     * 檢查ApplicationContext不為空.
     */
    private static void assertContextInjected() {
        Validate.validState(applicationContext != null,
                "applicaitonContext屬性未注入, 請在applicationContext.xml中定義SpringContextHolder.");
    }
}

啟動springboot項目就是報錯如題

經查發現是啟動及加載順序的問題，我的啟動類寫錯了

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);
    }

}

 

原因就在於還沒有加載初始化bean就用了

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

刪掉該代碼，在程序中應用啟動ok