如何使用apache poi 4.0 XDDFChartData，XDDFPieChartData生成饼图；在使用Java的Excel工作表中，我不想使用jfree

Question

我需要Java中的示例代码，目前我可以从图纸中读取值后绘制折线图，​​并且我还想生成饼图。

我试过的示例代码是用于.ppt格式的。

我想要在Excel中的饼图中也一样。

String[] categories = listCategories.toArray(new String[listCategories.size()]);
Double[] values = listValues.toArray(new Double[listValues.size()]);

final int numOfPoints = categories.length;
final String categoryDataRange = chart.formatRange(new CellRangeAddress(1, numOfPoints, 0, 0));
final String valuesDataRange = chart.formatRange(new CellRangeAddress(1, numOfPoints, 1, 1));
final XDDFDataSource<?> categoriesData = XDDFDataSourcesFactory.fromArray(categories, categoryDataRange);
final XDDFNumericalDataSource<? extends Number> valuesData = XDDFDataSourcesFactory.fromArray(values, valuesDataRange);

XDDFPieChartData.Series firstSeries = (XDDFPieChartData.Series) pie.getSeries().get(0);
firstSeries.replaceData(categoriesData, valuesData);
firstSeries.setTitle(chartTitle, chart.setSheetTitle(chartTitle, 0));
firstSeries.setExplosion(25);
chart.plot(pie);

Answer 1

源自https://svn.apache.org/repos/asf/poi/trunk/src/examples/src/org/apache/poi/xssf/usermodel/examples/中的图表示例，此处是PieChart使用该示例的示例XDDF：

import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xddf.usermodel.chart.LegendPosition;
import org.apache.poi.xddf.usermodel.chart.XDDFChartData;
import org.apache.poi.xddf.usermodel.chart.XDDFChartLegend;
import org.apache.poi.xddf.usermodel.chart.XDDFDataSource;
import org.apache.poi.xddf.usermodel.chart.XDDFDataSourcesFactory;
import org.apache.poi.xddf.usermodel.chart.XDDFNumericalDataSource;
import org.apache.poi.xddf.usermodel.chart.XDDFPieChartData;
import org.apache.poi.xssf.usermodel.XSSFChart;
import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
import org.apache.poi.xssf.usermodel.XSSFDrawing;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;


public class PieChart {

  public static void main(String[] args) throws IOException {
    try (XSSFWorkbook wb = new XSSFWorkbook()) {
      XSSFSheet sheet = wb.createSheet("piechart");
      final int NUM_OF_ROWS = 2;
      final int NUM_OF_COLUMNS = 10;

      // Create a row and put some cells in it. Rows are 0 based.
      Row row;
      Cell cell;
      for (int rowIndex = 0; rowIndex < NUM_OF_ROWS; rowIndex++) {
        row = sheet.createRow((short) rowIndex);
        for (int colIndex = 0; colIndex < NUM_OF_COLUMNS; colIndex++) {
          cell = row.createCell((short) colIndex);
          if (rowIndex == 0) cell.setCellValue("Cat " + (colIndex + 1));
          else cell.setCellValue((colIndex + 1) * (rowIndex + 1));
        }
      }

      XSSFDrawing drawing = sheet.createDrawingPatriarch();
      XSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 4, 10, 25);

      XSSFChart chart = drawing.createChart(anchor);
      chart.setTitleText("Pie Chart");
      chart.setTitleOverlay(false);
      XDDFChartLegend legend = chart.getOrAddLegend();
      legend.setPosition(LegendPosition.TOP_RIGHT);

      XDDFDataSource<String> cat = XDDFDataSourcesFactory.fromStringCellRange(sheet,
          new CellRangeAddress(0, 0, 0, NUM_OF_COLUMNS - 1));
      XDDFNumericalDataSource<Double> val = XDDFDataSourcesFactory.fromNumericCellRange(sheet,
          new CellRangeAddress(1, 1, 0, NUM_OF_COLUMNS - 1));

      XDDFChartData data = new XDDFPieChartData(chart.getCTChart().getPlotArea().addNewPieChart());
      data.setVaryColors(true);
      data.addSeries(cat, val);
      chart.plot(data);

      // Write the output to a file
      try (FileOutputStream fileOut = new FileOutputStream("ooxml-pie-chart.xlsx")) {
        wb.write(fileOut);
      }
    }
  }
}

上面是仅使用XDDF内容的最小示例。这是一个更扩展的版本，可以设置数据标签并使图表在中可见LibreOffice/OpenOffice Calc。但这需要使用低级的org.openxmlformats.schemas.drawingml.x2006.chart.*东西。

import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xddf.usermodel.chart.LegendPosition;
import org.apache.poi.xddf.usermodel.chart.XDDFChartData;
import org.apache.poi.xddf.usermodel.chart.XDDFChartLegend;
import org.apache.poi.xddf.usermodel.chart.XDDFDataSource;
import org.apache.poi.xddf.usermodel.chart.XDDFDataSourcesFactory;
import org.apache.poi.xddf.usermodel.chart.XDDFNumericalDataSource;
import org.apache.poi.xddf.usermodel.chart.XDDFPieChartData;
import org.apache.poi.xssf.usermodel.XSSFChart;
import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
import org.apache.poi.xssf.usermodel.XSSFDrawing;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import org.apache.poi.xssf.usermodel.DefaultIndexedColorMap;

public class PieChart {

  public static void main(String[] args) throws IOException {
    try (XSSFWorkbook wb = new XSSFWorkbook()) {
      XSSFSheet sheet = wb.createSheet("piechart");
      final int NUM_OF_ROWS = 2;
      final int NUM_OF_COLUMNS = 10;

      // Create a row and put some cells in it. Rows are 0 based.
      Row row;
      Cell cell;
      for (int rowIndex = 0; rowIndex < NUM_OF_ROWS; rowIndex++) {
        row = sheet.createRow((short) rowIndex);
        for (int colIndex = 0; colIndex < NUM_OF_COLUMNS; colIndex++) {
          cell = row.createCell((short) colIndex);
          if (rowIndex == 0) cell.setCellValue("Cat " + (colIndex + 1));
          else cell.setCellValue((colIndex + 1) * (rowIndex + 1));
        }
      }

      XSSFDrawing drawing = sheet.createDrawingPatriarch();
      XSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 4, 10, 25);

      XSSFChart chart = drawing.createChart(anchor);
      chart.setTitleText("Pie Chart");
      chart.setTitleOverlay(false);
      XDDFChartLegend legend = chart.getOrAddLegend();
      legend.setPosition(LegendPosition.TOP_RIGHT);

      XDDFDataSource<String> cat = XDDFDataSourcesFactory.fromStringCellRange(sheet,
          new CellRangeAddress(0, 0, 0, NUM_OF_COLUMNS - 1));
      XDDFNumericalDataSource<Double> val = XDDFDataSourcesFactory.fromNumericCellRange(sheet,
          new CellRangeAddress(1, 1, 0, NUM_OF_COLUMNS - 1));

      XDDFChartData data = new XDDFPieChartData(chart.getCTChart().getPlotArea().addNewPieChart());
      data.setVaryColors(true);
      XDDFChartData.Series series = data.addSeries(cat, val);
      chart.plot(data);

      // Add data labels
      if (!chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).isSetDLbls()) 
        chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).addNewDLbls();
      chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
        .addNewDLblPos().setVal(org.openxmlformats.schemas.drawingml.x2006.chart.STDLblPos.OUT_END);
      chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
        .addNewShowLegendKey().setVal(true);
      chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
        .addNewShowPercent().setVal(true);

      // Do not auto delete the title; is necessary for showing title in Calc
      if (chart.getCTChart().getAutoTitleDeleted() == null) chart.getCTChart().addNewAutoTitleDeleted();
      chart.getCTChart().getAutoTitleDeleted().setVal(false);

      // Data point colors; is necessary for showing data points in Calc
      int pointCount = series.getCategoryData().getPointCount(); 
      for (int p = 0; p < pointCount; p++) {
        chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).addNewDPt().addNewIdx().setVal(p);
        chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDPtArray(p)
          .addNewSpPr().addNewSolidFill().addNewSrgbClr().setVal(DefaultIndexedColorMap.getDefaultRGB(p+10));
      }

      // Write the output to a file
      try (FileOutputStream fileOut = new FileOutputStream("ooxml-pie-chart.xlsx")) {
        wb.write(fileOut);
      }
    }
  }
}

这段代码需要FAQ-N10025中ooxml- schemas-1.4.jar提到的所有模式的完整jar
。

由于版本的apache poi 4.1.1创建XDDFChartData data必须更改为：

...
import org.apache.poi.xddf.usermodel.chart.ChartTypes;
...
//XDDFChartData data = new XDDFPieChartData(chart.getCTChart().getPlotArea().addNewPieChart());
XDDFChartData data = chart.createData(ChartTypes.PIE, null, null);
...