fix converting cell number value to string

Author: vananiev

src/main/java/org/spacious_team/table_wrapper/excel/ExcelCellDataAccessObject.java

@@ -47,6 +47,16 @@ public Object getValue(Cell cell) {
         };
     }
 
+    @Override
+    public String getStringValue(Cell cell) {
+        Object value = getValue(cell);
+        String strValue = value.toString();
+        if ((value instanceof Number) && strValue.endsWith(".0")) {
+            return strValue.substring(0, strValue.length() - 2);
+        }
+        return strValue;
+    }
+
     @Override
     public Instant getInstantValue(Cell cell) {
         return cell.getDateCellValue().toInstant();