apache poi 4.0 bar chart example does not work

jacky :

When I'm trying apache poi4.0's project example, I encounter a problem of creating bar chart, after running the code,I open the xlsx file with a error msg
Excel found unreadable content in 'xxx.xlsx'. Do you want to recover the contents of this workbook? If you trust the source of the workbook, click Yes.
click yes and then get another msg
Excel was able to open the file by repairing or removing the unreadable content. Removed Part: /xl/drawings/drawing1.xml part (Drawing shape).
Click close and then no chart is add in the excel but the data is fine.
And then I try the lineChart and scatterChart example, face the same problem.
What's the most possible reason of this error and how to fix this?
Thanks in advance. :)

package org.apache.poi.xssf.usermodel.examples;

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.PresetColor;
import org.apache.poi.xddf.usermodel.XDDFColor;
import org.apache.poi.xddf.usermodel.XDDFShapeProperties;
import org.apache.poi.xddf.usermodel.XDDFSolidFillProperties;
import org.apache.poi.xddf.usermodel.chart.AxisCrosses;
import org.apache.poi.xddf.usermodel.chart.AxisPosition;
import org.apache.poi.xddf.usermodel.chart.ChartTypes;
import org.apache.poi.xddf.usermodel.chart.LegendPosition;
import org.apache.poi.xddf.usermodel.chart.XDDFCategoryAxis;
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.XDDFValueAxis;
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 BarChart {

  public static void main(String[] args) throws IOException {
    try (XSSFWorkbook wb = new XSSFWorkbook()) {
      XSSFSheet sheet = wb.createSheet("barchart");
      final int NUM_OF_ROWS = 3;
      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);
          cell.setCellValue(colIndex * (rowIndex + 1));
        }
      }

      XSSFDrawing drawing = sheet.createDrawingPatriarch();
      XSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 5, 10, 15);

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

      // 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);

      XDDFDataSource<Double> xs = XDDFDataSourcesFactory.fromNumericCellRange(sheet,
          new CellRangeAddress(0, 0, 0, NUM_OF_COLUMNS - 1));
      XDDFNumericalDataSource<Double> ys1 = XDDFDataSourcesFactory.fromNumericCellRange(sheet,
          new CellRangeAddress(1, 1, 0, NUM_OF_COLUMNS - 1));
      XDDFNumericalDataSource<Double> ys2 = XDDFDataSourcesFactory.fromNumericCellRange(sheet,
          new CellRangeAddress(2, 2, 0, NUM_OF_COLUMNS - 1));

      XDDFChartData data = chart.createData(ChartTypes.BAR, bottomAxis, leftAxis);
      data.addSeries(xs, ys1);
      data.addSeries(xs, ys2);
      chart.plot(data);

      XDDFSolidFillProperties fill = new XDDFSolidFillProperties(XDDFColor.from(PresetColor.CHARTREUSE));
      XDDFChartData.Series firstSeries = data.getSeries().get(0);
      XDDFShapeProperties properties = firstSeries.getShapeProperties();
      if (properties == null) {
        properties = new XDDFShapeProperties();
      }
      properties.setFillProperties(fill);
      firstSeries.setShapeProperties(properties);

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

Axel Richter :

The new XDDF code lacks the setting the axIds in the barChart, as well as the setting of the bar direction barDir which either can be COL for a column chart or BAR for a bar chart.

In /xl/charts/chart1.xml this looks like:

<c:barChart>
 <c:barDir val="bar"/>
 ...
 <c:axId val="0"/>
 <c:axId val="1"/>
</c:barChart>

for a bar chart

and

<c:barChart>
 <c:barDir val="col"/>
 ...
 <c:axId val="0"/>
 <c:axId val="1"/>
</c:barChart>

for a column chart.

Do adding:

...
      chart.plot(data);

      chart.getCTChart().getPlotArea().getBarChartArray(0).addNewBarDir().setVal(
       //org.openxmlformats.schemas.drawingml.x2006.chart.STBarDir.COL);
       org.openxmlformats.schemas.drawingml.x2006.chart.STBarDir.BAR);
      chart.getCTChart().getPlotArea().getBarChartArray(0).addNewAxId().setVal(bottomAxis.getId());
      chart.getCTChart().getPlotArea().getBarChartArray(0).addNewAxId().setVal(leftAxis.getId());
...

and it will at least work.

There are other issues too with the axis settings. That's why I would say that the bar chart creation, which is using only high level classes of apache poi, is not ready yet.

apache poi 4.0 bar chart example does not work

Guess you like