Apache POI：如何在数据透视表的行标签日期中设置THIS_YEAR过滤器

Question

我正在尝试使用apache poi在excel中创建一个枢轴。 我的要求是应用日期过滤器（此年份），即在数据透视表的日期行标签中仅显示当前年份的日期。

问题：在可重复生成的代码下方，该代码通过将“ THIS_YEAR”过滤器应用于日期列来生成输出excel文件，但由于某种原因，它未显示任何数据。

下面是生成输出的代码。

import java.io.FileOutputStream;

import org.apache.poi.ss.*;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.*;
import org.apache.poi.xssf.usermodel.*;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.*;

import java.util.GregorianCalendar;

class CreatePivotTableFilter {

 public static void main(String[] args) throws Exception {

  try (Workbook workbook = new XSSFWorkbook(); 
       FileOutputStream fileout = new FileOutputStream("Excel.xlsx") ) {

   DataFormat format = workbook.createDataFormat();
   CellStyle dateStyle = workbook.createCellStyle();
   dateStyle.setDataFormat(format.getFormat("M\\/d\\/yy"));

   Sheet sheet = workbook.createSheet();

   String[] headers = new String[]{"Column1", "Column2", "Date", "Count"};
   Row row = sheet.createRow(0);
   Cell cell;
   for (int c = 0; c < headers.length; c++) {
    cell = row.createCell(c); cell.setCellValue(headers[c]);
   }

   Object[][] data = new Object[][]{
    new Object[]{"A", "B1", new GregorianCalendar(2020, 0, 2), 2d},
    new Object[]{"A", "B2", new GregorianCalendar(2020, 0, 1), 4d},
    new Object[]{"B", "B1", new GregorianCalendar(2019, 0, 2), 1d},
    new Object[]{"B", "B2", new GregorianCalendar(2019, 0, 2), 7d},
    new Object[]{"A", "C1", new GregorianCalendar(2019, 0, 1), 5d},
    new Object[]{"A", "C2", new GregorianCalendar(2019, 0, 1), 5d},
    new Object[]{"B", "C1", new GregorianCalendar(2019, 0, 2), 2d},
    new Object[]{"B", "C2", new GregorianCalendar(2019, 0, 2), 8d}
   };
   for (int r = 0; r < data.length; r++) {
    row = sheet.createRow(r+1);
    Object[] rowData = data[r];
    for (int c = 0; c < rowData.length; c++) {
     cell = row.createCell(c);
     if (rowData[c] instanceof String) {
      cell.setCellValue((String)rowData[c]);
     } else if (rowData[c] instanceof GregorianCalendar) {
      cell.setCellValue((GregorianCalendar)rowData[c]);
      cell.setCellStyle(dateStyle);
     } else if (rowData[c] instanceof Double) {
      cell.setCellValue((Double)rowData[c]);
     }
    }
   }

   XSSFPivotTable pivotTable = ((XSSFSheet)sheet).createPivotTable(
    new AreaReference("A1:D9", 
    SpreadsheetVersion.EXCEL2007), 
    new CellReference("F4"));

   pivotTable.addRowLabel(0);
   pivotTable.addRowLabel(1);
   pivotTable.addRowLabel(2);
 
   pivotTable.addColumnLabel(DataConsolidateFunction.SUM, 3);
   pivotTable.addColumnLabel(DataConsolidateFunction.AVERAGE, 3);

   CTPivotFilters filters = CTPivotFilters.Factory.newInstance();
   CTPivotFilter filter = filters.addNewFilter();
   filter.setId(0);
   filter.setFld(2);
   filter.setType(STPivotFilterType.THIS_YEAR);
   CTFilterColumn filterColumn = filter.addNewAutoFilter().addNewFilterColumn();
   filterColumn.setColId(0);
   CTFilters ctFilters = filterColumn.addNewFilters();
   ctFilter.addNewFilter().setVal("This Year Filter");
    
   //set filters to pivot table definition
   pivotTable.getCTPivotTableDefinition().setFilters(filters);

   workbook.write(fileout);

  }

 }
}

代码生成的输出

预期产量

Answer 1

处理低级别ooxml-schemas类的最好方法是使用Excel的{​​{1}}创建任何想要的东西，然后解压缩生成的GUI文件并查看*.xlsx创建的XML。

在这种情况下，GUI中我们发现：

xl/pivotTables/pivotTable1.xml

所以... <filters> <filter fld="2" type="thisYear" id="0"> <autoFilter> <filterColumn colId="0"> <dynamicFilter type="thisYear"/> </filterColumn> </autoFilter> </filter> </filters> ... 不包含filterColumn，而是包含<filters><filter ...> dynamicFilter中的type。

因此您的代码必须是：

thisYear

很遗憾，没有... CTPivotFilters filters = CTPivotFilters.Factory.newInstance(); CTPivotFilter filter = filters.addNewFilter(); filter.setId(0); filter.setFld(2); filter.setType(STPivotFilterType.THIS_YEAR); CTFilterColumn filterColumn = filter.addNewAutoFilter().addNewFilterColumn(); filterColumn.setColId(0); CTDynamicFilter ctDynamicFilter = filterColumn.addNewDynamicFilter(); ctDynamicFilter.setType(STDynamicFilterType.THIS_YEAR); //set filters to pivot table definition pivotTable.getCTPivotTableDefinition().setFilters(filters); ... 公开的API文档。因此，如果需要，我们需要从ooxml-schemas下载ooxml-schemas源。然后，我们可以使用maven创建一个API文档。然后，我们可以在其中找到javadoc的字段和方法。