fix编译错误

cooleshow-user/user-biz/src/main/java/com/yonge/cooleshow/biz/dal/service/impl/TeacherServiceImpl.java

@@ -81,6 +81,7 @@ import com.yonge.toolset.thirdparty.message.MessageSenderPluginContext;
 import com.yonge.toolset.utils.date.DateUtil;
 import com.yonge.toolset.utils.idcard.IdcardInfoExtractor;
 import com.yonge.toolset.utils.string.ValueUtil;
+import org.apache.commons.lang3.StringUtils;
 import org.redisson.api.RMap;
 import org.redisson.api.RedissonClient;
 import org.slf4j.Logger;