org.apache.poi.xssf.usermodel
Classes 
XSSFAnchor
XSSFAutoFilter
XSSFBorderFormatting
XSSFCell
XSSFCellStyle
XSSFChart
XSSFChartSheet
XSSFChildAnchor
XSSFClientAnchor
XSSFColor
XSSFComment
XSSFConditionalFormatting
XSSFConditionalFormattingRule
XSSFConnector
XSSFCreationHelper
XSSFDataFormat
XSSFDataValidation
XSSFDataValidationConstraint
XSSFDataValidationHelper
XSSFDialogsheet
XSSFDrawing
XSSFEvaluationWorkbook
XSSFEvenFooter
XSSFEvenHeader
XSSFFactory
XSSFFirstFooter
XSSFFirstHeader
XSSFFont
XSSFFontFormatting
XSSFFormulaEvaluator
XSSFGraphicFrame
XSSFHyperlink
XSSFMap
XSSFName
XSSFOddFooter
XSSFOddHeader
XSSFPatternFormatting
XSSFPicture
XSSFPictureData
XSSFPrintSetup
XSSFRelation
XSSFRichTextString
XSSFRow
XSSFShape
XSSFShapeGroup
XSSFSheet
XSSFSheetConditionalFormatting
XSSFSimpleShape
XSSFTable
XSSFTextBox
XSSFTextParagraph
XSSFTextRun
XSSFVMLDrawing
XSSFWorkbook
Enums 
ListAutoNumber
TextAlign
TextAutofit
TextCap
TextDirection
TextFontAlign
TextHorizontalOverflow
TextVerticalOverflow