spring中使用@Autowired注解无法注入的情况及解决

@Component   //当前类注解为spring组件
public class AbnormalRateUtil {
 // 定义一个该类的静态变量
 private static AbnormalRateUtil abnormalRateUtil;
 //注入所需mapper
 @Autowired
 private InterFaceInfoMapper interFaceInfoMapper;
 @PostConstruct  //此注解的方法在bean加载前执行
 private void init() {
  abnormalRateUtil = this;
  abnormalRateUtil.interFaceInfoMapper=this.interFaceInfoMapper;
  //初始化时将静态化的interFaceInfoMapper进行了实例化
 }
 //静态get方法
 public static AbnormalRateUtil getAbnormalRateUtil() {
  return abnormalRateUtil;
 }
 //静态get方法
 public static InterFaceInfoMapper getInterFaceInfoMapper() {
  return abnormalRateUtil.interFaceInfoMapper;
 }
}

List<InterFaceRuler> ruleList=AbnormalRateUtil.getInterFaceInfoMapper().findRuleById(id);