如何使用POI 4.0.1 Java将垂直线添加到条形图

Question

如何使用POI将垂直线添加到条形图（水平）。我想添加一条类似于这条橙色垂直线的线。 Bar chart + vertical line

这里提到手册MS Excel工作https://www.extendoffice.com/documents/excel/2344-excel-add-vertical-line-to-bar-chart.html

我已经将这个答案用于将柱形图与水平线图https://stackoverflow.com/a/47080178/9693259相结合

要创建此图Column chart + horizontal line

我已将柱形图更改为条形图Bar chart + horizontal line

但是我找不到如何改变折线图的方向，就像我用柱子做的那样。条形图左侧有类别轴，底部有值轴。折线图仅接受底部的类别轴。

编辑：Attempt at Bar chart + Line chart

Answer 1

如果您读取链接的How to add vertical/average line to bar chart in Excel?正确，那么您将看到，条形图和散点图合并而不是条形图和折线图。这是因为平均值必须位于图表的X轴上，并且只有散点图能够在X轴上显示十进制值。对于所有其他图表，X轴是类别轴。

因此，要使用apache poi创建与链接文章相同的内容，我们可以使用低级底层ooxml bean（ooxml-schemas-*.jar必须在类路径中）这样做：

import java.io.FileOutputStream;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.usermodel.charts.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFChart;
import org.apache.poi.xssf.usermodel.XSSFDrawing;

import org.openxmlformats.schemas.drawingml.x2006.chart.*;

public class BarAndScatterChartLowLevel {

 public static void main(String[] args) throws Exception {
  Workbook wb = new XSSFWorkbook();
  Sheet sheet = wb.createSheet("Sheet1");

  Row row;
  Cell cell;

  row = sheet.createRow(0);
  row.createCell(0);
  row.createCell(1).setCellValue("Bars");

  for (int r = 1; r < 7; r++) {
   row = sheet.createRow(r);
   cell = row.createCell(0);
   cell.setCellValue("C" + r);
   cell = row.createCell(1);
   cell.setCellFormula("RANDBETWEEN(5, 10)/10");
  }

  row = sheet.createRow(7);
  row.createCell(0).setCellValue("Average");
  row = sheet.createRow(8);
  row.createCell(0).setCellValue("Y");
  row.createCell(1).setCellValue("X");
  row = sheet.createRow(9);
  row.createCell(0).setCellValue(0);
  row.createCell(1).setCellFormula("AVERAGE($B$2:$B$7)");
  row = sheet.createRow(10);
  row.createCell(0).setCellValue(1);
  row.createCell(1).setCellFormula("AVERAGE($B$2:$B$7)");

  Drawing drawing = sheet.createDrawingPatriarch();
  ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 4, 0, 11, 15);

  XSSFChart chart = ((XSSFDrawing)drawing).createChart(anchor);

  CTChart ctChart = chart.getCTChart();  
  CTPlotArea ctPlotArea = ctChart.getPlotArea();

  //the bar chart
  CTBarChart ctBarChart = ctPlotArea.addNewBarChart();
  CTBoolean ctBoolean = ctBarChart.addNewVaryColors();
  ctBoolean.setVal(true);
  ctBarChart.addNewBarDir().setVal(STBarDir.BAR);

  //the bar series
  CTBarSer ctBarSer = ctBarChart.addNewSer();
  CTSerTx ctSerTx = ctBarSer.addNewTx();
  CTStrRef ctStrRef = ctSerTx.addNewStrRef();
  ctStrRef.setF("Sheet1!$B$1");
  ctBarSer.addNewIdx().setVal(0);  
  CTAxDataSource cttAxDataSource = ctBarSer.addNewCat();
  ctStrRef = cttAxDataSource.addNewStrRef();
  ctStrRef.setF("Sheet1!$A$2:$A$7"); 
  CTNumDataSource ctNumDataSource = ctBarSer.addNewVal();
  CTNumRef ctNumRef = ctNumDataSource.addNewNumRef();
  ctNumRef.setF("Sheet1!$B$2:$B$7");

  //telling the BarChart that it has axes and giving them Ids
  ctBarChart.addNewAxId().setVal(123456); //cat axis 1 (bars)
  ctBarChart.addNewAxId().setVal(123457); //val axis 1 (left)

  //the scatter chart
  CTScatterChart ctScatterChart = ctPlotArea.addNewScatterChart();
  ctBoolean = ctScatterChart.addNewVaryColors();
  ctBoolean.setVal(true);

  //the scatter series
  CTScatterSer ctScatterSer = ctScatterChart.addNewSer();
  ctSerTx = ctScatterSer.addNewTx();
  ctStrRef = ctSerTx.addNewStrRef();
  ctStrRef.setF("Sheet1!$A$8");
  ctScatterSer.addNewIdx().setVal(1);  
  cttAxDataSource = ctScatterSer.addNewXVal();
  ctStrRef = cttAxDataSource.addNewStrRef();
  ctStrRef.setF("Sheet1!$B$10:$B$11"); 
  ctNumDataSource = ctScatterSer.addNewYVal();
  ctNumRef = ctNumDataSource.addNewNumRef();
  ctNumRef.setF("Sheet1!$A$10:$A$11");

  //telling the ScatterChart that it has axes and giving them Ids
  ctScatterChart.addNewAxId().setVal(123458); //cat axis 2 (scatter)
  ctScatterChart.addNewAxId().setVal(123459); //val axis 2 (right)

  //cat axis 1 (bars)
  CTCatAx ctCatAx = ctPlotArea.addNewCatAx(); 
  ctCatAx.addNewAxId().setVal(123456); //id of the cat axis
  CTScaling ctScaling = ctCatAx.addNewScaling();
  ctScaling.addNewOrientation().setVal(STOrientation.MIN_MAX);
  ctCatAx.addNewDelete().setVal(false);
  ctCatAx.addNewAxPos().setVal(STAxPos.B);
  ctCatAx.addNewCrossAx().setVal(123457); //id of the val axis
  ctCatAx.addNewTickLblPos().setVal(STTickLblPos.NEXT_TO);

  //val axis 1 (left)
  CTValAx ctValAx = ctPlotArea.addNewValAx(); 
  ctValAx.addNewAxId().setVal(123457); //id of the val axis
  ctScaling = ctValAx.addNewScaling();
  ctScaling.addNewOrientation().setVal(STOrientation.MIN_MAX);
  ctValAx.addNewDelete().setVal(false);
  ctValAx.addNewAxPos().setVal(STAxPos.L);
  ctValAx.addNewCrossAx().setVal(123456); //id of the cat axis
  ctValAx.addNewCrosses().setVal(STCrosses.AUTO_ZERO); //this val axis crosses the cat axis at zero
  ctValAx.addNewTickLblPos().setVal(STTickLblPos.NEXT_TO);

  //cat axis 2 (scatter)
  ctCatAx = ctPlotArea.addNewCatAx(); 
  ctCatAx.addNewAxId().setVal(123458); //id of the cat axis
  ctScaling = ctCatAx.addNewScaling();
  ctScaling.addNewOrientation().setVal(STOrientation.MIN_MAX);
  ctCatAx.addNewDelete().setVal(true); //this cat axis is deleted
  ctCatAx.addNewAxPos().setVal(STAxPos.B);
  ctCatAx.addNewCrossAx().setVal(123459); //id of the val axis
  ctCatAx.addNewTickLblPos().setVal(STTickLblPos.NEXT_TO);

  //val axis 2 (right)
  ctValAx = ctPlotArea.addNewValAx(); 
  ctValAx.addNewAxId().setVal(123459); //id of the val axis
  ctScaling = ctValAx.addNewScaling();
  ctScaling.addNewOrientation().setVal(STOrientation.MIN_MAX);
  ctScaling.addNewMax().setVal(1.0);
  ctValAx.addNewDelete().setVal(false);
  ctValAx.addNewAxPos().setVal(STAxPos.R);
  ctValAx.addNewCrossAx().setVal(123458); //id of the cat axis
  ctValAx.addNewCrosses().setVal(STCrosses.MAX); //this val axis crosses the cat axis at max value
  ctValAx.addNewTickLblPos().setVal(STTickLblPos.NEXT_TO);

  //legend
  CTLegend ctLegend = ctChart.addNewLegend();
  ctLegend.addNewLegendPos().setVal(STLegendPos.B);
  ctLegend.addNewOverlay().setVal(false);

  FileOutputStream fileOut = new FileOutputStream("BarAndScatterChart.xlsx");
  wb.write(fileOut);
  fileOut.close();
  wb.close();
 }
}

但由于apache poi 4.0.1现在提供XDDF的东西，同样可以做如下：

import java.io.*;

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.util.*;
import org.apache.poi.xddf.usermodel.*;
import org.apache.poi.xddf.usermodel.chart.*;

public class BarAndScatterChart {

 public static void main(String[] args) throws IOException {
  try (XSSFWorkbook wb = new XSSFWorkbook()) {
   // Create the data
   XSSFSheet sheet = wb.createSheet("Sheet1");

   Row row;
   Cell cell;

   row = sheet.createRow(0);
   row.createCell(0);
   row.createCell(1).setCellValue("Bars");

   for (int r = 1; r < 7; r++) {
    row = sheet.createRow(r);
    cell = row.createCell(0);
    cell.setCellValue("C" + r);
    cell = row.createCell(1);
    cell.setCellFormula("RANDBETWEEN(5, 10)/10");
   }

   row = sheet.createRow(7);
   row.createCell(0).setCellValue("Average");
   row = sheet.createRow(8);
   row.createCell(0).setCellValue("Y");
   row.createCell(1).setCellValue("X");
   row = sheet.createRow(9);
   row.createCell(0).setCellValue(0);
   row.createCell(1).setCellFormula("AVERAGE($B$2:$B$7)");
   row = sheet.createRow(10);
   row.createCell(0).setCellValue(1);
   row.createCell(1).setCellFormula("AVERAGE($B$2:$B$7)");

   // create data sources
   XDDFDataSource<String> cat = XDDFDataSourcesFactory.fromStringCellRange(sheet, new CellRangeAddress(1, 6, 0, 0));
   XDDFNumericalDataSource<Double> barVal = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 6, 1, 1));
   XDDFDataSource<Double> scatterX = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(9, 10, 1, 1));
   XDDFNumericalDataSource<Double> scatterY = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(9, 10, 0, 0));

   XSSFDrawing drawing = sheet.createDrawingPatriarch();
   XSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 4, 0, 11, 15);

   XSSFChart chart = drawing.createChart(anchor);
   XDDFChartLegend legend = chart.getOrAddLegend();
   legend.setPosition(LegendPosition.BOTTOM);

   // bar chart

   // Use a category axis for the bottom axis.
   XDDFCategoryAxis bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
   XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
   leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);
   leftAxis.setCrossBetween(AxisCrossBetween.BETWEEN);

   XDDFChartData data = chart.createData(ChartTypes.BAR, bottomAxis, leftAxis);
   XDDFChartData.Series series1 = data.addSeries(cat, barVal);
   series1.setTitle("bars", new CellReference(sheet.getSheetName(), 0, 1, true, true));
   chart.plot(data);

   // in order to transform a bar chart into a column chart, you just need to change the bar direction
   XDDFBarChartData bar = (XDDFBarChartData) data;
   bar.setBarDirection(BarDirection.BAR);

   solidFillSeries(data, 0, PresetColor.CHARTREUSE);

   // scatter chart

   // axis must be there but must not be visible
   bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
   bottomAxis.setVisible(false);
   // right axis for scatter chart
   XDDFValueAxis rightAxis = chart.createValueAxis(AxisPosition.RIGHT);
   rightAxis.setCrosses(AxisCrosses.MAX);
   rightAxis.setMaximum(1.0);

   // set correct cross axis
   bottomAxis.crossAxis(rightAxis);
   rightAxis.crossAxis(bottomAxis);

   data = chart.createData(ChartTypes.SCATTER, bottomAxis, rightAxis);
   XDDFScatterChartData.Series series2 = (XDDFScatterChartData.Series)data.addSeries(scatterX, scatterY);
   series2.setTitle("average", new CellReference(sheet.getSheetName(), 7, 0, true, true));
   series2.setSmooth(false); 
   chart.plot(data);

   // correct the id and order, must not be 0 again because there is one bar series already
   chart.getCTChart().getPlotArea().getScatterChartArray(0).getSerArray(0).getIdx().setVal(1);
   chart.getCTChart().getPlotArea().getScatterChartArray(0).getSerArray(0).getOrder().setVal(1);

   solidLineSeries(data, 0, PresetColor.BLUE);

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

 private static void solidFillSeries(XDDFChartData data, int index, PresetColor color) {
  XDDFSolidFillProperties fill = new XDDFSolidFillProperties(XDDFColor.from(color));
  XDDFChartData.Series series = data.getSeries().get(index);
  XDDFShapeProperties properties = series.getShapeProperties();
  if (properties == null) {
   properties = new XDDFShapeProperties();
  }
  properties.setFillProperties(fill);
  series.setShapeProperties(properties);
 }

 private static void solidLineSeries(XDDFChartData data, int index, PresetColor color) {
  XDDFSolidFillProperties fill = new XDDFSolidFillProperties(XDDFColor.from(color));
  XDDFLineProperties line = new XDDFLineProperties();
  line.setFillProperties(fill);
  XDDFChartData.Series series = data.getSeries().get(index);
  XDDFShapeProperties properties = series.getShapeProperties();
  if (properties == null) {
   properties = new XDDFShapeProperties();
  }
  properties.setLineProperties(line);
  series.setShapeProperties(properties);
 }
}