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我需要一些幫助解決我遇到的問題。 我首先要描述我的問題，然後，如果需要，可以閱讀下面的代碼並查看實現細節。無法在.xlsx代中觸發數據透視表計算
簡短說明： 我生成包含2片Excel工作簿：
表1：通用數據。
表2：通用數據透視表。
因爲一些Apache提供的POI證明了錯誤，我通過訪問底層的XML結構創建了Pivot表。 xlsx文件。在這裏我指出數據透視表字段和操作（在這種情況下爲COUNT）。
我現在正在設計自動JUnit測試來驗證這一點，這是我遇到麻煩的地方。
問題： 當生成包含文檔的XLSX，樞軸表僅與後我在客戶端打開它的值填充。
我想問一下是否有方法在我打開客戶端之前以編程方式觸發數據透視表。 這裏是XLSX的文檔的底層XML（pivotTable1.xml）的2個部分：
在Excel客戶端開口之前：
<location firstDataCol="1" firstDataRow="1" firstHeaderRow="1" ref="A3:D7"/>
<pivotFields count="8">
<pivotField showAll="false" axis="axisPage">
<items count="8">
<item t="default"/>
<item t="default"/>
<item t="default"/>
在Excel客戶端開口後
<pivotFields count="8">
<pivotField axis="axisPage" showAll="0">
<items count="2">
<item x="0"/>
<item t="default"/>
</items>
如果我嘗試在JUnit中使用生成的Excel，在打開它之前，我得到一個NULL： currentWbSheet.getRow(0)。 如果我先打開文件然後運行測試，則不會發生這種情況。
你知道一種生成數據透視表的方式，可以通過這種方式來計算數據透視表的生成或如何從我的Java應用程序中觸發它？
我的目標是將此生成的xlsx與已知（「黃金」）xlsx測試進行比較，並逐個驗證其內容是否相同。
代碼示例： 工作簿表單生成：
private void createSheets(XSSFWorkbook wb) {
generalDataSheet = wb.createSheet(GENERAL_DATA_SHEET_NAME);
pivotTableSheet = wb.createSheet(PIVOT_TABLE_SHEET_NAME);
}
數據透視表的實現和使用的詳細信息：
// Pivot table constants:
// where the Table starts with the Report Filter field
public static final String PIVOT_TABLE_SOURCE_START = "A1";
// Where the 2nd part of the pivot table starts with the Sum Values field
public static final String PIVOT_TABLE_DATA_START = "A3:B3";
private static final String PIVOT_TABLE_NAME = " Pivot Table";
private static final int INTERFACE_NAME_CELL_POS = 0;
private static final int PROVIDER_NAME_CELL_POS = 4;
private static final int REQUESTER_NAME_CELL_POS = 6;
…
private void populatePivotTableSheet(List<MyDataSet> list) {
//Set position of the pivot table in sheet
CellReference pivotTableCellPosition = new CellReference(PIVOT_TABLE_SOURCE_START);
//set source area for the pivot table
AreaReference pivotTableSourceArea = getDefaultPivotTableSourceArea(list);
// create pivot table and set attributespivotTable = new PivotTableMyTools(pivotTableSourceArea, PIVOT_TABLE_NAME);
pivotTable.createPivotTable(pivotTableSheet, pivotTableCellPosition);
// set the size of the pivot Table - this is because of a bug in regular API
pivotTable.setRefField(PIVOT_TABLE_DATA_START);
pivotTable.addRowLabelsField(PROVIDER_NAME_CELL_POS);
pivotTable.addColumnLabelsField(REQUESTER_NAME_CELL_POS);
pivotTable.addReportFilterField(INTERFACE_NAME_CELL_POS);
pivotTable.addSumValuesField(DataConsolidateFunction.COUNT,PROVIDER_NAME_CELL_POS);
}
我得到的數據透視表像源區：
private AreaReference getDefaultPivotTableSourceArea(Object linkSetList) {
List<MyDataSet> list = (List<MyDataSet>) DataSetList;
// construct the target area of the Pivot table
// start cell is calculated as for ex: "General data!A2"
CellReference c1 = new CellReference(GENERAL_DATA_SHEET_NAME + "!" + PIVOT_TABLE_SOURCE_START);
String colName = CellReference.convertNumToColString(COLUMN_HEADERS.length - 1);
// end cell is calculated as for ex: "General data!H5"
CellReference c2 = new CellReference(GENERAL_DATA_SHEET_NAME + "!" + colName + (list.size() + 1));
return new AreaReference(c1, c2);
}
然後我用我自己的數據透視表類覆蓋的一些方法：
public class PivotTableMyTools extends XSSFPivotTable implements IPivotTableMyTools {
private XSSFSheet pivotTableSheet; // Sheet displaying information in pivot
private AreaReference sourceDataArea;
private XSSFPivotTable pivotTable;
private int numberOfDataFields;
private String pivotTableName;
public PivotTableMyTools(AreaReference sourceDataArea, String pivotTableName) {
this.sourceDataArea = sourceDataArea;
numberOfDataFields = 0;
this.pivotTableName = pivotTableName;
}
@Override
public void createPivotTable(XSSFSheet destinationSheet, CellReference pivotTableCellPosition) {
pivotTableSheet = destinationSheet;
pivotTable = pivotTableSheet.createPivotTable(sourceDataArea, pivotTableCellPosition);
pivotTable.getCTPivotTableDefinition().setName(pivotTableName);
}
// int fieldID is the ID of the field in the list of fields to be added to
// the report (column headers of the source data area)
@Override
public void addReportFilterField(int fieldID) {
int lastColIndex = getSourceAreaLastColumnIndex();
// create new pivot field with Column Specifications
try {
// throws index out of bounds
checkColumnIndexOutOfBounds(fieldID, lastColIndex);
// add pivot field to PivotTable, lastColindex also indicates the
// number of columns
addNewPivotField(fieldID, lastColIndex, STAxis.AXIS_PAGE);
// Columns labels colField should be added.
addNewCTPageField(fieldID);
} catch (IndexOutOfBoundsException e) {
Activator.logInfo("Column index is out of bounds");
Activator.logError(e.getMessage());
}
}
private void addNewCTPageField(int columnIndex) {
CTPageFields pageFields;
if (pivotTable.getCTPivotTableDefinition().getPageFields() != null) {
pageFields = pivotTable.getCTPivotTableDefinition().getPageFields();
} else {
pageFields = pivotTable.getCTPivotTableDefinition().addNewPageFields();
}
// Set the fld and hier attributes
CTPageField pageField = pageFields.addNewPageField();
pageField.setFld(columnIndex);
pageField.setHier(-1);
// set the count attribute
pageFields.setCount(pageFields.sizeOfPageFieldArray());
}
@Override
public void addRowLabelsField(int columnIndex) {
pivotTable.addRowLabel(columnIndex);
}
@Override
public void addColumnLabelsField(int columnIndex) {
int lastColIndex = getSourceAreaLastColumnIndex();
// create new pivot field with Column Specifications
try {
// throws index out of bounds
checkColumnIndexOutOfBounds(columnIndex, lastColIndex);
// add pivot field to PivotTable, lastColindex also indicates the
// number of columns
addNewPivotField(columnIndex, lastColIndex, STAxis.AXIS_COL);
// Columns labels colField should be added.
addNewCTColField(columnIndex);
} catch (IndexOutOfBoundsException e) {
Activator.logInfo("Column index is out of bounds");
Activator.logError(e.getMessage());
}
}
@Override
public void addSumValuesField(DataConsolidateFunction function, int fieldID) {
// pivotTable.addColumnLabel(DataConsolidateFunction.COUNT,
// PROVIDER_NAME_CELL_POS, "Provider count");
try {
CTPivotField pivotField = getPivotField(fieldID);
pivotField.setDataField(true);
} catch (IndexOutOfBoundsException e) {
Activator.logInfo("The selected column is out of current range");
Activator.logError(e.getMessage());
}
addNewCTDataField(fieldID, "Count of Provider");
}
private void addNewCTDataField(int fieldID, String fieldName) {
numberOfDataFields++;
CTDataFields dataFields = pivotTable.getCTPivotTableDefinition().addNewDataFields();
CTDataField dataField = dataFields.addNewDataField();
dataField.setName(fieldName);
dataField.setFld(fieldID);
dataField.setSubtotal(STDataConsolidateFunction.COUNT);
dataField.setBaseField(0);
dataField.setBaseItem(0);
dataFields.setCount(numberOfDataFields);
}
private CTPivotField getPivotField(int fieldID) throws IndexOutOfBoundsException {
CTPivotFields pivotFields = pivotTable.getCTPivotTableDefinition().getPivotFields();
if (null == pivotFields)
throw new IndexOutOfBoundsException();
return pivotFields.getPivotFieldArray(4);
}
@Override
public AreaReference getPivotTableSourceArea() {
return sourceDataArea;
}
@Override
public int getSourceAreaLastColumnIndex() {
return (sourceDataArea.getLastCell().getCol() - sourceDataArea.getFirstCell().getCol());
}
@Override
public void setRefField(String pivotTableFieldArea) {
CTLocation location = pivotTable.getCTPivotTableDefinition().getLocation();
location.setRef("A3:D7");
}
/***************** private methods ***********************************/
private void addNewCTColField(int columnIndex) {
CTColFields colFields;
if (pivotTable.getCTPivotTableDefinition().getColFields() != null) {
colFields = pivotTable.getCTPivotTableDefinition().getColFields();
} else {
colFields = pivotTable.getCTPivotTableDefinition().addNewColFields();
}
colFields.addNewField().setX(columnIndex);
colFields.setCount(colFields.sizeOfFieldArray());
}
private void addNewPivotField(int columnIndex, int numberOfItems, Enum axisValue) {
IPivotFieldARTools pivotField = new PivotFieldARTools();
pivotField.setAxis(axisValue);
pivotField.createItemsList(numberOfItems);
pivotField.addToPivotTable(columnIndex, pivotTable);
}
private void checkColumnIndexOutOfBounds(int columnIndex, int lastColIndex) throws IndexOutOfBoundsException {
if (columnIndex > lastColIndex && columnIndex < 0) {
throw new IndexOutOfBoundsException();
}
}