Apache poi
仅对创建数据透视表提供基本支持。它仅创建默认的数据透视表,但无法在不回退到底层的情况下创建特殊设置ooxml-schemas
类。
对于您的数据源,以下代码创建什么apache poi
默认支持:
import java.io.FileOutputStream;
import java.io.FileInputStream;
import org.apache.poi.ss.SpreadsheetVersion;
import org.apache.poi.ss.util.AreaReference;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.xssf.usermodel.*;
class CreatePivotTableDefault {
public static void main(String[] args) throws Exception {
try (XSSFWorkbook workbook = new XSSFWorkbook(new FileInputStream("ExcelSource.xlsx"));
FileOutputStream fileout = new FileOutputStream("ExcelResult.xlsx") ) {
XSSFSheet dataSheet = workbook.getSheetAt(0);
XSSFSheet pivotSheet = workbook.createSheet("Pivot");
AreaReference areaReference = new AreaReference("A1:D5", SpreadsheetVersion.EXCEL2007);
XSSFPivotTable pivotTable = pivotSheet.createPivotTable(areaReference, new CellReference("A1"), dataSheet);
pivotTable.addRowLabel(2);
pivotTable.addRowLabel(3);
pivotTable.addRowLabel(0);
pivotTable.addRowLabel(1);
workbook.write(fileout);
}
}
}
这将创建一个大纲格式的数据透视表,这是默认的。
如果您想创建一个不是大纲格式并且不显示每个字段的小计的数据透视表,我们需要使用底层ooxml-schemas
类。我们需要创建正确的数据透视表字段项。我们需要构建一个缓存定义,其中包含这些项目的共享元素。也可以看看Apache POI XSSFPivotTable setDefaultSubtotal https://stackoverflow.com/questions/37305976/apache-poi-xssfpivottable-setdefaultsubtotal/40480654#40480654.
以下代码应从数据源创建您想要的数据透视表:
import java.io.FileOutputStream;
import java.io.FileInputStream;
import org.apache.poi.ss.SpreadsheetVersion;
import org.apache.poi.ss.util.AreaReference;
import org.apache.poi.ss.util.CellReference;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTPivotField;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.xssf.usermodel.*;
class CreatePivotTable {
static void addRowLabel(XSSFPivotTable pivotTable, XSSFSheet dataSheet, AreaReference areaReference, int column) {
DataFormatter formatter = new DataFormatter(java.util.Locale.US);
//create row label - apache poi creates as much fields for each as rows are in the pivot table data range
pivotTable.addRowLabel(column);
//determine unique labels in column
java.util.TreeSet<String> uniqueItems = new java.util.TreeSet<String>(String.CASE_INSENSITIVE_ORDER);
for (int r = areaReference.getFirstCell().getRow()+1; r < areaReference.getLastCell().getRow()+1; r++) {
uniqueItems.add(formatter.formatCellValue(dataSheet.getRow(r).getCell(column)));
}
//System.out.println(uniqueItems);
//build pivot table and cache
CTPivotField ctPivotField = pivotTable.getCTPivotTableDefinition().getPivotFields().getPivotFieldArray(column);
int i = 0;
for (String item : uniqueItems) {
//take the items as numbered items: <item x="0"/><item x="1"/>
ctPivotField.getItems().getItemArray(i).unsetT();
ctPivotField.getItems().getItemArray(i).setX((long)i);
//build a cache definition which has shared elements for those items
pivotTable.getPivotCacheDefinition().getCTPivotCacheDefinition().getCacheFields().getCacheFieldArray(column)
.getSharedItems().addNewS().setV(item);
i++;
}
//set pivot field settings
ctPivotField.setOutline(false); // no outline format
ctPivotField.setDefaultSubtotal(false); // no subtotals for this field
//remove further items
if (ctPivotField.getDefaultSubtotal()) i++; //let one default item be if there shall be subtotals
for (int k = ctPivotField.getItems().getItemList().size()-1; k >= i; k--) {
ctPivotField.getItems().removeItem(k);
}
ctPivotField.getItems().setCount(i);
}
public static void main(String[] args) throws Exception {
try (XSSFWorkbook workbook = new XSSFWorkbook(new FileInputStream("ExcelSource.xlsx"));
FileOutputStream fileout = new FileOutputStream("ExcelResult.xlsx") ) {
XSSFSheet dataSheet = workbook.getSheetAt(0);
XSSFSheet pivotSheet = workbook.createSheet("Pivot");
AreaReference areaReference = new AreaReference("A1:D5", SpreadsheetVersion.EXCEL2007);
XSSFPivotTable pivotTable = pivotSheet.createPivotTable(areaReference, new CellReference("A1"), dataSheet);
addRowLabel(pivotTable, dataSheet, areaReference, 2);
addRowLabel(pivotTable, dataSheet, areaReference, 3);
addRowLabel(pivotTable, dataSheet, areaReference, 0);
addRowLabel(pivotTable, dataSheet, areaReference, 1);
workbook.write(fileout);
}
}
}
此代码使用当前测试apache poi 4.1.2
并需要所有模式的完整 jarooxml-schemas-1.4.jar
(旧版本的较低版本)如中所述apache poi 常见问题解答-N10025 https://poi.apache.org/help/faq.html#faq-N10025.