• Updating POI to 4.1.2
• Several dependency updates to fix security vulnerabilities
• Updated to JUnit5

This will be the last major release using Apache POI 4.x. Future releases will use 5.x.

• Upgrade to POI 4.0
• Cells with the FORMULA flag are now treated correctly as forumlas instead of strings (#154)
• Fixed formatting issue with number and date formulas (#118)

• Fix an issue causing errors about bad return types #109
• Fix Shared Strings Table parsing when using SST cache #105
• Ignore formula tag that isn't within a cell #128
• Updated POI dependency to 3.17 #120
• Optimized based on output from profiler on large sheets #112
• Update xerces2 dependency to 2.11.1 due to CVE-2013-4002 #113

• Support for Apache poi 3.15 (#81)
• Support for Cell.getRichStringCellValue() (#82)
• NullPointerException in StreamingRow.getCell when policy is RETURN_BLANK_AS_NULL (#85)
• NPE when retrieving missing r attrs for cell and row in sheetreader (#87)
• error during read file java.lang.IndexOutOfBoundsException (#91)

• Buffered SST option for massive workbooks (#73)
• Support for getCell() with MissingCellPolicy (#67)
• Support for 1904-based dates (#72)

• Support for Workbook.isSheetHidden() and Workbook.isSheetVeryHidden() (#26)
• Support for Row.getFirstCellNum() (#49)
• Support for StreamingRow.getPhysicalNumberOfCells() (#61)
• Support for Sheet.getLastRowNum() (#56)
• Support for Cell.getBooleanCellValue() (#50)
• Fix for Row.getLastCellNum() return value (#61)
• Avoid NPE on spreadsheetDrawing row tags (#59)
• Correctly throwing IllegalStateException on Cell.getDateCellValue() when type is CELL_TYPE_STRING (#53)

Thanks to @bvp and @ToddWarwaruk for their contributions!

• Support for Sheet.isColumnHidden() and Row.getZeroHeight() (#48)
• Support for Row.getLastCellNum() (#41)

• New Workbook- and Sheet-compatible API
• Can iterate over sheets (#16)

• Fix for #39