如何在核心Java中使用Apache POI 4.1.1创建PIE图表？

问题描述

我不熟悉apache POI。我正在使用jdbc从数据库获取数据。我在工作表中还需要一个饼图。如图所示，它只有两列和多行。饼图中包含％。请帮忙。

解决方法

我已经在how to generate piechart using apache poi 4.0 XDDFChartData,XDDFPieChartData; in excel sheet using java,i dont want to use jfree中回答了这个问题。

但是，为了显示另一个示例，下面是一个Minimal,Reproducible Example，用于创建您在问题中显示的内容。

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.ChartTypes;
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 {

    Object[][] data = new Object[][] {
     new Object[] {"ID","Count"},new Object[] {"Passport",13d},new Object[] {"License",5d},new Object[] {"Greencard",27d},new Object[] {"Other",10d},new Object[] {"Utility Bills",16d},new Object[] {"Debit Cards",25d},};

    try (XSSFWorkbook wb = new XSSFWorkbook()) {
      XSSFSheet sheet = wb.createSheet("piechart");
      final int NUM_OF_ROWS = data.length;
      final int NUM_OF_COLUMNS = 2;

      // create sheet data
      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);
          Object cellValue = data[rowIndex][colIndex];
          if (cellValue instanceof String) {
            cell.setCellValue((String)cellValue);
          } else if (cellValue instanceof Double) {
            cell.setCellValue((Double)cellValue);
          }
        }
      }

      // create drawing and anchor
      XSSFDrawing drawing = sheet.createDrawingPatriarch();
      XSSFClientAnchor anchor = drawing.createAnchor(0,3,1,9,15);

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

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

      XDDFChartData chartData = chart.createData(ChartTypes.PIE,null,null);
      chartData.setVaryColors(true);
      XDDFChartData.Series series = chartData.addSeries(cat,val);
      chart.plot(chartData);

      // 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()
        .addNewShowLegendKey().setVal(true);
      chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
        .addNewShowPercent().setVal(true);
      chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
        .addNewShowLeaderLines().setVal(true);
      chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
        .addNewShowVal().setVal(false);
      chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
        .addNewShowCatName().setVal(false);
      chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
       .addNewShowSerName().setVal(false);
      chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
       .addNewShowBubbleSize().setVal(false);

      // 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);
      }
    }
  }
}

此代码已使用当前的apache poi 4.1.2进行了测试，并且需要apache poi FAQ-N10025中提到的所有模式ooxml-schemas-1.4.jar（较旧版本的较低版本）的完整jar。

结果：