如何解决如何在核心Java中使用Apache POI 4.1.1创建PIE图表?
我不熟悉apache POI。我正在使用jdbc从数据库获取数据。我在工作表中还需要一个饼图。如图所示,它只有两列和多行。饼图中包含%。请帮忙。
解决方法
但是,为了显示另一个示例,下面是一个Minimal,Reproducible Example,用于创建您在问题中显示的内容。
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.chart.ChartTypes;
import org.apache.poi.xddf.usermodel.chart.LegendPosition;
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.XDDFPieChartData;
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;
import org.apache.poi.xssf.usermodel.DefaultIndexedColorMap;
public class PieChart {
public static void main(String[] args) throws IOException {
Object[][] data = new Object[][] {
new Object[] {"ID","Count"},new Object[] {"Passport",13d},new Object[] {"License",5d},new Object[] {"Greencard",27d},new Object[] {"Other",10d},new Object[] {"Utility Bills",16d},new Object[] {"Debit Cards",25d},};
try (XSSFWorkbook wb = new XSSFWorkbook()) {
XSSFSheet sheet = wb.createSheet("piechart");
final int NUM_OF_ROWS = data.length;
final int NUM_OF_COLUMNS = 2;
// create sheet data
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);
Object cellValue = data[rowIndex][colIndex];
if (cellValue instanceof String) {
cell.setCellValue((String)cellValue);
} else if (cellValue instanceof Double) {
cell.setCellValue((Double)cellValue);
}
}
}
// create drawing and anchor
XSSFDrawing drawing = sheet.createDrawingPatriarch();
XSSFClientAnchor anchor = drawing.createAnchor(0,3,1,9,15);
// create chart
XSSFChart chart = drawing.createChart(anchor);
chart.setTitleText("Identification");
chart.setTitleOverlay(false);
XDDFChartLegend legend = chart.getOrAddLegend();
legend.setPosition(LegendPosition.TOP_RIGHT);
XDDFDataSource<String> cat = XDDFDataSourcesFactory.fromStringCellRange(sheet,new CellRangeAddress(1,NUM_OF_ROWS - 1,0));
XDDFNumericalDataSource<Double> val = XDDFDataSourcesFactory.fromNumericCellRange(sheet,1));
XDDFChartData chartData = chart.createData(ChartTypes.PIE,null,null);
chartData.setVaryColors(true);
XDDFChartData.Series series = chartData.addSeries(cat,val);
chart.plot(chartData);
// add data labels
if (!chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).isSetDLbls())
chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).addNewDLbls();
chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
.addNewShowLegendKey().setVal(true);
chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
.addNewShowPercent().setVal(true);
chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
.addNewShowLeaderLines().setVal(true);
chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
.addNewShowVal().setVal(false);
chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
.addNewShowCatName().setVal(false);
chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
.addNewShowSerName().setVal(false);
chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDLbls()
.addNewShowBubbleSize().setVal(false);
// do not auto delete the title; is necessary for showing title in Calc
if (chart.getCTChart().getAutoTitleDeleted() == null) chart.getCTChart().addNewAutoTitleDeleted();
chart.getCTChart().getAutoTitleDeleted().setVal(false);
// data point colors; is necessary for showing data points in Calc
int pointCount = series.getCategoryData().getPointCount();
for (int p = 0; p < pointCount; p++) {
chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).addNewDPt().addNewIdx().setVal(p);
chart.getCTChart().getPlotArea().getPieChartArray(0).getSerArray(0).getDPtArray(p)
.addNewSpPr().addNewSolidFill().addNewSrgbClr().setVal(DefaultIndexedColorMap.getDefaultRGB(p+10));
}
// write the output to a file
try (FileOutputStream fileOut = new FileOutputStream("ooxml-pie-chart.xlsx")) {
wb.write(fileOut);
}
}
}
}
此代码已使用当前的apache poi 4.1.2
进行了测试,并且需要apache poi FAQ-N10025中提到的所有模式ooxml-schemas-1.4.jar
(较旧版本的较低版本)的完整jar。
结果:
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