问题
I want to create stacked bar chart using Apache poi 4.0.1 and Java language for Excel
- The output excel file's extension should be .xlsx
- The generated chart should have Chart title and Data Labels
- The generated chart should also be able to show the total sum of all data at the top of each column (you can see total for each column is shown in yellow boxes)
- You can refer following image for more clarity about what I'm looking for.
- Data for stacked bar chart
Date Category High Medium Low
10/01 3 0 3 0
10/02 3 0 2 1
10/03 3 0 2 1
10/04 4 1 2 1
10/05 11 1 7 3
10/08 14 1 10 3
10/09 15 1 11 3
10/10 15 1 11 3
10/11 15 0 11 4
10/12 8 0 6 2
回答1:
Derived from the bar chart and line chart examples in https://svn.apache.org/repos/asf/poi/trunk/src/examples/src/org/apache/poi/xssf/usermodel/examples/ we also can get a combined chart as requested here. But until now not all requested is possible only using the high level XDDF classes. Some correcting are necessary for which we need using the underlying low level ooxml-schemas-1.4 beans. So ooxml-schemas-1.4.jar needs to be in class path.
In following code the following changes where made to the official examples:
leftAxis.setCrossBetween(AxisCrossBetween.BETWEEN); is set. So category axis crosses the value axis between the strokes and not midpoint the strokes. Else the bars are only half wide visible for first and last category.
chart.getCTChart().getPlotArea().getBarChartArray(0).addNewOverlap().setVal((byte)100); sets an overlap of 100%. Else the bars of the single series are not really stacked but remains side by side.
Adding data labels is only possible using the underlying low level ooxml-schemas-1.4 beans.
The additional line chart must have it's own axes which are crossing each other properly. But those axes must be invisible.
Because while adding to the chart, the line chart does not knows something about the already present bar chart, it's IDs starts with 0 again. But this is wrong for an combined chart. So we need correct the id and order. It must not start with 0 again because there are three bar series already.
Following code needs a StackedBarAndLineChart.xlsx having the data provided in the question in first sheet in range A1:E11.
Code:
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 StackedBarAndLineChart {
public static void main(String[] args) throws IOException {
try (FileInputStream in = new FileInputStream("StackedBarAndLineChart.xlsx");
XSSFWorkbook wb = (XSSFWorkbook)WorkbookFactory.create(in)) {
XSSFSheet sheet = wb.getSheetAt(0);
// determine the type of the category axis from it's first category value (value in A2 in this case)
XDDFDataSource date = null;
CellType type = CellType.ERROR;
Row row = sheet.getRow(1);
if (row != null) {
Cell cell = row.getCell(0);
if (cell != null) {
type = cell.getCellType();
if (type == CellType.STRING) {
date = XDDFDataSourcesFactory.fromStringCellRange(sheet, new CellRangeAddress(1, 10, 0, 0));
} else if (type == CellType.NUMERIC) {
date = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 10, 0, 0));
} else if (type == CellType.FORMULA) {
type = cell.getCachedFormulaResultType();
if (type == CellType.STRING) {
date = XDDFDataSourcesFactory.fromStringCellRange(sheet, new CellRangeAddress(1, 10, 0, 0));
} else if (type == CellType.NUMERIC) {
date = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 10, 0, 0));
}
}
}
}
if (date != null) { // if no type of category axis found, don't create a chart at all
XDDFNumericalDataSource<Double> high = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 10, 2, 2));
XDDFNumericalDataSource<Double> medium = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 10, 3, 3));
XDDFNumericalDataSource<Double> low = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 10, 4, 4));
XDDFNumericalDataSource<Double> category = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 10, 1, 1));
XSSFDrawing drawing = sheet.createDrawingPatriarch();
XSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 6, 0, 16, 20);
XSSFChart chart = drawing.createChart(anchor);
XDDFChartLegend legend = chart.getOrAddLegend();
legend.setPosition(LegendPosition.RIGHT);
// bar chart
XDDFCategoryAxis bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
leftAxis.setTitle("Number of defects");
leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);
// category axis crosses the value axis between the strokes and not midpoint the strokes
leftAxis.setCrossBetween(AxisCrossBetween.BETWEEN);
XDDFChartData data = chart.createData(ChartTypes.BAR, bottomAxis, leftAxis);
XDDFChartData.Series series1 = data.addSeries(date, high);
series1.setTitle("high", new CellReference(sheet.getSheetName(), 0, 2, true, true));
XDDFChartData.Series series2 = data.addSeries(date, medium);
series2.setTitle("medium", new CellReference(sheet.getSheetName(), 0, 3, true, true));
XDDFChartData.Series series3 = data.addSeries(date, low);
series3.setTitle("low", new CellReference(sheet.getSheetName(), 0, 4, true, true));
chart.plot(data);
XDDFBarChartData bar = (XDDFBarChartData) data;
bar.setBarDirection(BarDirection.COL);
// looking for "Stacked Bar Chart"? uncomment the following line
bar.setBarGrouping(BarGrouping.STACKED);
// correcting the overlap so bars really are stacked and not side by side
chart.getCTChart().getPlotArea().getBarChartArray(0).addNewOverlap().setVal((byte)100);
solidFillSeries(data, 0, PresetColor.CORNFLOWER_BLUE);
solidFillSeries(data, 1, PresetColor.LIGHT_SALMON);
solidFillSeries(data, 2, PresetColor.LIGHT_GRAY);
// add data labels
for (int s = 0 ; s < 3; s++) {
chart.getCTChart().getPlotArea().getBarChartArray(0).getSerArray(s).addNewDLbls();
chart.getCTChart().getPlotArea().getBarChartArray(0).getSerArray(s).getDLbls()
.addNewDLblPos().setVal(org.openxmlformats.schemas.drawingml.x2006.chart.STDLblPos.CTR);
chart.getCTChart().getPlotArea().getBarChartArray(0).getSerArray(s).getDLbls().addNewShowVal().setVal(true);
chart.getCTChart().getPlotArea().getBarChartArray(0).getSerArray(s).getDLbls().addNewShowLegendKey().setVal(false);
chart.getCTChart().getPlotArea().getBarChartArray(0).getSerArray(s).getDLbls().addNewShowCatName().setVal(false);
chart.getCTChart().getPlotArea().getBarChartArray(0).getSerArray(s).getDLbls().addNewShowSerName().setVal(false);
}
// line chart
// axis must be there but must not be visible
bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
bottomAxis.setVisible(false);
leftAxis = chart.createValueAxis(AxisPosition.LEFT);
leftAxis.setVisible(false);
// set correct cross axis
bottomAxis.crossAxis(leftAxis);
leftAxis.crossAxis(bottomAxis);
data = chart.createData(ChartTypes.LINE, bottomAxis, leftAxis);
XDDFLineChartData.Series series4 = (XDDFLineChartData.Series)data.addSeries(date, category);
series4.setTitle("total", null);
series4.setSmooth(false);
series4.setMarkerStyle(MarkerStyle.STAR);
chart.plot(data);
// correct the id and order, must not start 0 again because there are three bar series already
chart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(0).getIdx().setVal(3);
chart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(0).getOrder().setVal(3);
solidLineSeries(data, 0, PresetColor.YELLOW);
// add data labels
chart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(0).addNewDLbls();
chart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(0).getDLbls()
.addNewSpPr().addNewSolidFill().addNewSrgbClr().setVal(new byte[]{(byte)255,(byte)255,0});
chart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(0).getDLbls()
.addNewDLblPos().setVal(org.openxmlformats.schemas.drawingml.x2006.chart.STDLblPos.CTR);
chart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(0).getDLbls().addNewShowVal().setVal(true);
chart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(0).getDLbls().addNewShowLegendKey().setVal(false);
chart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(0).getDLbls().addNewShowCatName().setVal(false);
chart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(0).getDLbls().addNewShowSerName().setVal(false);
}
// Write the output to a file
try (FileOutputStream fileOut = new FileOutputStream("StackedBarAndLineChartResult.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);
}
}
Result:
Edit 2019-03-01:
I have improved my code a little bit. It now determines the type of the category axis from it's first category value (value in A2 in this case). And for the data labels explicitly the position is set and it is explicitly set that only the values should shown but not legend key, category name or series name.
来源：https://stackoverflow.com/questions/54919555/how-to-generate-editable-stacked-bar-chart-using-apache-poi-4-0-1-and-java