public class LineChart {
public static void main(String[] args) throws IOException {
try (XSSFWorkbook wb = new XSSFWorkbook()) {
XSSFSheet sheet = wb.createSheet("linechart");
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 + 1.0));
}
}
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.BOTTOM);
// Use a category axis for the bottom axis.
XDDFCategoryAxis bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
//bottomAxis.setTitle("x"); // https://stackguides.com/questions/32010765
XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
//leftAxis.setTitle("f(x)");
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));
XDDFLineChartData data = (XDDFLineChartData) chart.createData(ChartTypes.LINE, bottomAxis, leftAxis);
XDDFLineChartData.Series series1 = (XDDFLineChartData.Series) data.addSeries(xs, ys1);
series1.setTitle("2x", null); // https://stackguides.com/questions/21855842
series1.setSmooth(false); // https://stackguides.com/questions/29014848
series1.setMarkerStyle(MarkerStyle.DOT); // https://stackguides.com/questions/39636138
series1.setShowLeaderLines(true);
XDDFLineChartData.Series series2 = (XDDFLineChartData.Series) data.addSeries(xs, ys2);
series2.setTitle("3x", null);
//series2.setSmooth(true);
//series2.setMarkerSize((short) 6);
//series2.setMarkerStyle(MarkerStyle.NONE); // https://stackguides.com/questions/39636138
series2.setShowLeaderLines(false);
chart.plot(data);
// if your series have missing values like https://stackguides.com/questions/29014848
// chart.displayBlanksAs(DisplayBlanks.GAP);
// https://stackguides.com/questions/24676460
solidLineSeries(data, 0, PresetColor.CHARTREUSE);
solidLineSeries(data, 1, PresetColor.BLACK);
// Write the output to a file
try (FileOutputStream fileOut = new FileOutputStream("ooxml-line-chart.xlsx")) {
wb.write(fileOut);
}
}
}
//CTPresetLineDashProperties
private static void solidLineSeries(XDDFChartData data, int index, PresetColor color) {
XDDFSolidFillProperties fill = new XDDFSolidFillProperties(XDDFColor.from(color));
XDDFLineProperties line = new XDDFLineProperties();
//line.setPresetDash(new XDDFPresetLineDash(PresetLineDash.DOT));
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);
}
}
This is an example from: http://svn.apache.org/repos/asf/poi/trunk/src/examples/src/org/apache/poi/xssf/usermodel/examples/LineChart.java
And I use poi version is 4.1.1.
when I use series1.setShowLeaderLines(true) or series2.setShowLeaderLines(false) it will show label as picture 1, and contains Series Name, Category Name, Value and Legend Key, also label position is Right.
Is it possible to change it picture 2 which just contain Value and label position is Center? Thanks!!!
