trimtosize :
There's a problem with the official examples LineChart and ScatterChart for Apache POI 4.0. They compile and run without errors, but the created Excel file cannot be opened stating that there is unreadable content. Excel 2010 & 2016 are giving the option to recover data from the workbook and after clickin' yes, this dialog appears. What might be the problem?
Axel Richter :
The new XDDF
code lacks the setting the axId
s in the lineChart
and scatterChart
.
In /xl/charts/chart1.xml
this looks like:
<c:lineChart>
...
<c:axId val="0"/>
<c:axId val="1"/>
</c:lineChart>
for a line chart..
Do adding:
...
XDDFChartData data = chart.createData(ChartTypes.LINE, bottomAxis, leftAxis);
data.addSeries(xs, ys1);
data.addSeries(xs, ys2);
chart.plot(data);
//setting the axis Ids to the LineChart
chart.getCTChart().getPlotArea().getLineChartArray(0).addNewAxId().setVal(bottomAxis.getId());
chart.getCTChart().getPlotArea().getLineChartArray(0).addNewAxId().setVal(leftAxis.getId());
// Write the output to a file
try (FileOutputStream fileOut = new FileOutputStream("ooxml-line-chart.xlsx")) {
wb.write(fileOut);
}
...
in LineChart.java
and
...
XDDFChartData data = chart.createData(ChartTypes.SCATTER, bottomAxis, leftAxis);
data.addSeries(xs, ys1);
data.addSeries(xs, ys2);
chart.plot(data);
//setting the axis Ids to the ScatterChart
chart.getCTChart().getPlotArea().getScatterChartArray(0).addNewAxId().setVal(bottomAxis.getId());
chart.getCTChart().getPlotArea().getScatterChartArray(0).addNewAxId().setVal(leftAxis.getId());
// Write the output to a file
try (FileOutputStream fileOut = new FileOutputStream("ooxml-scatter-chart.xlsx")) {
wb.write(fileOut);
}
...
in ScatterChart.java
and it will work.