new的对象中获取spring中的bean类报applicationContext为null

我是使用实现ApplicationContextAware接口封装一个工具类来初始化一个applicationContext来使用的，项目启动是也看到初始化成功了，applicationContext是有值的，但在new的对象中使用时却报null?不知道为什么，请大神指点，下面是代码实现：

 public class BeanContext implements ApplicationContextAware {
    private static ApplicationContext applicationContext;

    public static ApplicationContext getApplicationContext(){
        return applicationContext;
    }

    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) throws BeansException {
        return (T)applicationContext.getBean(name);
    }

    public static <T> T getBean(Class<T> clz) throws BeansException {
        return applicationContext.getBean(clz);
    }



    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        BeanContext.applicationContext = applicationContext;
    }
}

public class SyncDataTask extends AbstractTask {

private SyncDataParameters syncDataParameters;

private Job job;

private DataSource dataSource;

private BaseDataSource baseDataSource;

/**

• task dir
  */
  private String taskDir;

  private ShellCommandExecutor shellCommandExecutor;

  /**

• process database access
  */
  private ProcessDao processDao;

  private DataxJsonUtil dataxUtil = BeanContext.getBean(DataxJsonUtil.class);
  }

beanContext类上是有component注解的，syncDataTask是普通的类，没有交给spring管理，DataxJsonUtil是spring管理的类

@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
       ** this.applicationContext = applicationContext;**
 }