AutosizeColumns on SXSSFWorkbook

Question

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

Answer 1

Error: NullPointerException on org.apache.poi.ss.util.SheetUtil.getCellWidth(SheetUtil.java:122)

Fix: Always set value to Cell as shown below, it throws NullPointerException when there is null in Cell, so set the value as:

Cell c = row.createCell(i);
c.setCellValue(text == null ? "" : text );

Answer 2

You need to make sure every cell has a value.

We use the following code to set a string value to a cell:

Cell c = row.createCell(i);
c.setCellValue(text == null ? "" : text );

** Cell should never be null values else it throws NullPointerException. Hence set the value as shown above.

Thanks a lot, this helped!!

Answer 3

Use sheet.isColumnTrackedForAutoSizing(0); for first and subsequently used for other column, i have faced exception whenever code executed autoSizeColumn(0) get executed. by using above code i have resolved the issue and it's good to expand the column width too based on the text.