// Create a new workbook Workbook workbook = new Workbook(); Object sourceData = new Object[][]{ {"Order ID", "Product", "Category", "Amount", "Date", "Country"}, {1, "Bose 785593-0050", "Consumer Electronics", 4270, new GregorianCalendar(2018, 0, 6), "United States"}, {2, "Canon EOS 1500D", "Consumer Electronics", 8239, new GregorianCalendar(2018, 0, 7), "United Kingdom"}, {3, "Haier 394L 4Star", "Consumer Electronics", 617, new GregorianCalendar(2018, 0, 8), "United States"}, {4, "IFB 6.5 Kg FullyAuto", "Consumer Electronics", 8384, new GregorianCalendar(2018, 0, 10), "Canada"}, {5, "Mi LED 40inch", "Consumer Electronics", 2626, new GregorianCalendar(2018, 0, 10), "Germany"}, {6, "Sennheiser HD 4.40-BT", "Consumer Electronics", 3610, new GregorianCalendar(2018, 0, 11), "United States"}, {7, "Iphone XR", "Mobile", 9062, new GregorianCalendar(2018, 0, 11), "Australia"}, {8, "OnePlus 7Pro", "Mobile", 6906, new GregorianCalendar(2018, 0, 16), "New Zealand"}, {9, "Redmi 7", "Mobile", 2417, new GregorianCalendar(2018, 0, 16), "France"}, {10, "Samsung S9", "Mobile", 7431, new GregorianCalendar(2018, 0, 16), "Canada"}, {11, "OnePlus 7Pro", "Mobile", 8250, new GregorianCalendar(2018, 0, 16), "Germany"}, {12, "Redmi 7", "Mobile", 7012, new GregorianCalendar(2018, 0, 18), "United States"}, {13, "Bose 785593-0050", "Consumer Electronics", 1903, new GregorianCalendar(2018, 0, 20), "Germany"}, {14, "Canon EOS 1500D", "Consumer Electronics", 2824, new GregorianCalendar(2018, 0, 22), "Canada"}, {15, "Haier 394L 4Star", "Consumer Electronics", 6946, new GregorianCalendar(2018, 0, 24), "France"}, }; IWorksheet worksheet = workbook.getWorksheets().get(0); worksheet.getRange("G1:L16").setValue(sourceData); worksheet.getRange("G:L").setColumnWidth(15); IPivotCache pivotcache = workbook.getPivotCaches().create(worksheet.getRange("G1:L16")); IPivotTable pivottable = worksheet.getPivotTables().add(pivotcache, worksheet.getRange("A1"), "pivottable1"); worksheet.getRange("J1:J16").setNumberFormat("$#,##0.00"); //config pivot table's fields IPivotField field_Category = pivottable.getPivotFields().get("Category"); field_Category.setOrientation(PivotFieldOrientation.ColumnField); IPivotField field_Product = pivottable.getPivotFields().get("Product"); field_Product.setOrientation(PivotFieldOrientation.RowField); IPivotField field_Amount = pivottable.getPivotFields().get("Amount"); field_Amount.setOrientation(PivotFieldOrientation.DataField); field_Amount.setNumberFormat("$#,##0.00"); IPivotField field_Country = pivottable.getPivotFields().get("Country"); field_Country.setOrientation(PivotFieldOrientation.PageField); //Change data field's summarize function. field_Amount.setFunction(ConsolidationFunction.Average); worksheet.getRange("A:D").getEntireColumn().autoFit(); // Save to an excel file workbook.save("ChangeDataFieldSummarizeFunction.xlsx");