SXSSFWorkbook 上的 AutosizeColumns [英] AutosizeColumns on SXSSFWorkbook
问题描述
是否可以在流式 SXSSFWorkbook 上自动调整大小列?我实现了一个导出功能,将对象列表导出到 excel.起初我使用了 XSSFWorkbook(不是流式处理),在创建了所有单元格之后,我自动调整了所有列的大小,从而生成了一个不错的 excel 文件.
Is it possible to autoSizeColumns on a streaming SXSSFWorkbook? I implemented an export functionality to export a list of objects to excel. At first I used the XSSFWorkbook (not streaming) and after all the cells were created, I autosized all the columns, resulting in a nice excel file.
由于性能问题,我们希望将工作簿更改为流式版本,但这导致 org.apache.poi.ss.util.SheetUtil.getCellWidth 处出现 NullPointer.
For performance issues we wanted to change the workbook to the streaming version, but this resulted in a NullPointer at org.apache.poi.ss.util.SheetUtil.getCellWidth.
是否可以为 SXSSFWorkbook 调用 autoSizeColumns?
Is it possible to call autoSizeColumns for a SXSSFWorkbook?
我使用的是 poi-ooxml 3.9,但我在 3.8 中遇到了同样的问题.
Im using poi-ooxml 3.9, but I have the same issue in 3.8.
推荐答案
你需要确保每个单元格都有一个值.
You need to make sure every cell has a value.
我们使用以下代码为单元格设置字符串值:
We use the following code to set a string value to a cell:
Cell c = row.createCell(i);
c.setCellValue(text == null ? "" : text );
** Cell 永远不应该是 null 值,否则它会抛出 NullPointerException.因此设置如上所示的值.
** Cell should never be null values else it throws NullPointerException. Hence set the value as shown above.
非常感谢,这有帮助!!
Thanks a lot, this helped!!
这篇关于SXSSFWorkbook 上的 AutosizeColumns的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!