Question

我需要一些帮助，我正在一个项目中，我需要使用报表过滤器创建数据透视表。现在，我想为报表过滤器设置多个默认值。我已经解决了之前发布的问题，请点击here！我在网上找不到与此相关的任何内容。提前致谢。

Answer 1

自上次回答以来，使用apache poi创建数据透视表没有太大变化。因此，我在问题中链接的“问答”中的代码仅可以扩展一点，以满足在页面过滤器中选择多个默认项的要求。像Excel一样，将无法使用通用数据从各种数据创建数据透视表的代码。

如果需要选择多个项目，则需要在适当的枢轴字段中设置第一个MultipleItemSelectionAllowed。

然后为每个不应选择的项目H（idden）设置为true。

示例：

import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.*;
import org.apache.poi.ss.SpreadsheetVersion;

import java.util.Random;
import java.io.*;

class PivotTableTest4 {

 private static void setCellData(Sheet sheet) {
  Row row = sheet.createRow(0);
  Cell cell = row.createCell(0);
  cell.setCellValue("Name");
  cell = row.createCell(1);
  cell.setCellValue("Value1");
  cell = row.createCell(2);
  cell.setCellValue("Value2");
  cell = row.createCell(3);
  cell.setCellValue("City");

  for (int r = 1; r < 15; r++) {
   row = sheet.createRow(r);
   cell = row.createCell(0);
   cell.setCellValue("Name " + ((r-1) % 5 + 1));
   cell = row.createCell(1);
   cell.setCellValue(r * new java.util.Random().nextDouble());
   cell = row.createCell(2);
   cell.setCellValue(r * new java.util.Random().nextDouble());
   cell = row.createCell(3);
   cell.setCellValue("City " + ((r-1) % 4 + 1));  
  }
 }

 public static void main(String[] args) {
  try {
   XSSFWorkbook wb = new XSSFWorkbook();
   XSSFSheet sheet = wb.createSheet();

   //Create some data to build the pivot table on
   setCellData(sheet);

   XSSFPivotTable pivotTable = sheet.createPivotTable(
    new AreaReference(new CellReference("A1"), new CellReference("D15"), SpreadsheetVersion.EXCEL2007), new CellReference("H5"));
   //Configure the pivot table
   //Use first column as row label
   pivotTable.addRowLabel(0);
   //Sum up the second column
   pivotTable.addColumnLabel(DataConsolidateFunction.SUM, 1);
   //Avarage the third column
   pivotTable.addColumnLabel(DataConsolidateFunction.AVERAGE, 2);
   //Add fourth column as page filter
   pivotTable.addReportFilter(3);
/*   
   Apache poi adds 15 pivot field items of type "default" (<item t="default"/>) here. 
   This is because there are 15 rows (A1:D15) and, because they don't have a look at the data, 
   they are assuming max 15 different values. This is fine because Excel will rebuild its pivot cache while opening. 

   But if we want preselect items, then this is not fine. Then we must know what items there are that can be preselected.

   So we need at least as much items as we want preselecting as numbered items: <item x="0"/><item x="1"/><item x="2"/>... 

   And we must build a cache definition which has shared elements for those items.
*/
   for (int i = 0; i < 4; i++) {
    //take the first 4 items as numbered items: <item x="0"/><item x="1"/><item x="2"/><item x="3"/>
    pivotTable.getCTPivotTableDefinition().getPivotFields().getPivotFieldArray(3).getItems().getItemArray(i).unsetT();
    pivotTable.getCTPivotTableDefinition().getPivotFields().getPivotFieldArray(3).getItems().getItemArray(i).setX((long)i);
    //build a cache definition which has shared elements for those items 
    //<sharedItems><s v="City 1"/><s v="City 2"/><s v="City 3"/><s v="City 4"/></sharedItems>
    pivotTable.getPivotCacheDefinition().getCTPivotCacheDefinition().getCacheFields().getCacheFieldArray(3).getSharedItems().addNewS().setV("City " + (i+1));
   }

   //Now we can predefinite a page filter. Second item, which is "City 2", in this case.
   //pivotTable.getCTPivotTableDefinition().getPageFields().getPageFieldArray(0).setItem(1);

   //If the need is selecting multiple items, first MultipleItemSelectionAllowed needs to be set.
   pivotTable.getCTPivotTableDefinition().getPivotFields().getPivotFieldArray(3).setMultipleItemSelectionAllowed(true);
   //Then set H(idden) true for all items which not shall be selected. First ("City 1") and fourth ("City 4") in this case.
   pivotTable.getCTPivotTableDefinition().getPivotFields().getPivotFieldArray(3).getItems().getItemArray(0).setH(true);
   pivotTable.getCTPivotTableDefinition().getPivotFields().getPivotFieldArray(3).getItems().getItemArray(3).setH(true);

   FileOutputStream fileOut = new FileOutputStream("PivotTableTest4.xlsx");
   wb.write(fileOut);
   fileOut.close();
   wb.close();
  } catch (FileNotFoundException e) {
    e.printStackTrace();
  } catch (IOException e) {
    e.printStackTrace();
  }
 }
}

这需要FAQ中提到的所有模式ooxml-schemas-1.3.jar的完整jar。

如何在Apache POI数据透视表报表过滤器中设置多个默认值

1 个答案: