Null value in Excel is an uncommon error thatoccurs when there is something fundamentally wrong with theformula. If it occurs in Excel, it can beconfusing to some people, but it really is very simple to correct. Key Takeaways Excel Doesn’t Have a True NULL: Unlike databases, Excel does ...
JAVA POI读取Excel中Cell为null的处理 空数据:没有任何编辑过的单元格(非空格) 有时候我们需要对根据每一列的信息进行处理,这里就会出现易错的缺陷。 1.不需要这些空数据 row =sheet.getRow(i);for(Cell c : row) {//处理} 2.需要这些空数据 row =sheet.getRow(i);for(intj=0;j<row.getLastCellNum()...
1、先用正则表达式判断数据是否为数值型,如果为数值型,则设置单元格格式为整数或者小数; 2、然后往单元格中存放数据的时候要设置数据的格式为double类型,如果查看poi的源码HSSFCell.java会发现设置数据的方法如下,所以用setCellValue(double)方法即可。 优化 到了这里,您可能以为万事大吉啊了,其实上面的代码有个陷阱,...
①cell.getDateCellValue()注释:获取单元格的值作为一个date,如果是string抛出异常,如果是空的返回null,可以参考HSSFDataFormatter 了解Excel如何格式化date为string。 ②cell.getRichStringCellValue()注释:获取cell的值,格式为string,如果是numeric 抛出异常,如果是空则返回空字符串。 获取单元格的值并以String格式返回,...
null_color用于指定高亮的背景色,默认是红色subset用于指定操作的列或行props用于突出显示CSS属性(后面案例中会涉及到)比如,我们可以指定高亮的背景色为橙色(颜色可以是英文名称)比如,我们可以指定高亮的背景色为紫红色(颜色可以是16进制)2.2. 高亮最大值 df.style.highlight_max()...
{ViliGroupOne.class})private int max;/*** 最小*/@Excel(name = "Min")@Min(value = 3, groups = {ViliGroupTwo.class})private int min;/*** 非空校验*/@Excel(name = "NotNull")@NotNullprivate String notNull;/*** 正则校验*/@Excel(name = "Regex")@Pattern(regexp = "[\u4E00-\...
object value) public static Task SaveAsByTemplateAsync(string path, byte[] templateBytes, object value) public static Task<DataTable> QueryAsDataTableAsync(string path, bool useHeaderRow = true, string sheetName = null, ExcelType excelType = ExcelType.UNKNOWN, string startCell = "A1", IConf...
BlockedErrorCellValueSubType BorderIndex BorderLineStyle BorderWeight BuiltInPivotTableStyle BuiltInSlicerStyle BuiltInStyle BuiltInTableStyle BusyErrorCellValueSubType CalcErrorCellValueSubType CalculationMode CalculationState CalculationType CellControlType CellValueType ChartAxisCategoryType ChartAxisDisplayUnit Chart...
Your formula is referring to a cell that itself is currently displaying a #NULL! warning. The #N/A Warning These are some causes of the #N/A warning: Your formula includes a VLOOKUP function that cannot find the value you are asking it to find in its lookup table — Your formula is ...
DBNull from excel sheet even though values are in the cell Debug does not exist in the current context? Decimal Binding Issue in Wpf Declare integer or double in XAML Default ControlTemplate for Ribbon? Default converter can't convert from empty string to int? Default date in Datepicker Default...