优化

src/main/java/com/qtzl/alterSales/manager/tools/ExcelUtils.java

 import com.qtzl.alterSales.manager.model.protocol.center.excel.ExcelClassField;
 import com.qtzl.alterSales.manager.model.protocol.center.excel.ExcelExport;
 import com.qtzl.alterSales.manager.model.protocol.center.excel.ExcelImport;
-import io.netty.util.internal.StringUtil;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.poi.hssf.usermodel.HSSFDataValidation;
 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
     }
 
     private static boolean isNumeric(String str) {
-        if (StringUtil.isNullOrEmpty(str) && "0.0".equals(str)) {
+        if (StringUtils.isEmpty(str) && "0.0".equals(str)) {
             return true;
         }
         if (StringUtils.isEmpty(str)){