我正在尝试在xlsx文件中创建2列的n条形图，如下所示。
但这让我感到困惑，无法理解org.openxmlformats.schemas.drawingml.x2006.chart中的类如何工作。
我已经尝试过了，但是生成文件没有得到我绘制的图表。
我有以下代码：
Drawing drawing = planilha.createDrawingPatriarch();
ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 5, 5, 15);
Chart chart = drawing.createChart(anchor);
CTChart ctChart = ((XSSFChart)chart).getCTChart();
CTPlotArea ctPlotArea = ctChart.getPlotArea();
CTBarChart ctBarChart = ctPlotArea.addNewBarChart();
CTBoolean ctBoolean = ctBarChart.addNewVaryColors();
ctBoolean.setVal(true);
ctBarChart.addNewBarDir().setVal(STBarDir.COL);
CellRangeAddress rangeAreas = new CellRangeAddress(1,3,1,1);
CellRangeAddress rangeTotais = new CellRangeAddress(1,3,5,5);
CTBarSer ctBarSer = ctBarChart.addNewSer();
CTSerTx ctSerTx = ctBarSer.addNewTx();
CTStrRef ctStrRef = ctSerTx.addNewStrRef();
ctStrRef.setF("Gráfico!"+rangeAreas.formatAsString());
CTNumDataSource ctNumDataSource = ctBarSer.addNewVal();
CTNumRef ctNumRef = ctNumDataSource.addNewNumRef();
ctNumRef.setF("Gráfico!"+rangeTotais.formatAsString());
//this code below I copied of an example and I don't know what is necessary
ctBarChart.addNewAxId().setVal(123456);
ctBarChart.addNewAxId().setVal(123457);
CTCatAx ctCatAx = ctPlotArea.addNewCatAx();
ctCatAx.addNewAxId().setVal(123456); //id of the cat axis
CTScaling ctScaling = ctCatAx.addNewScaling();
ctScaling.addNewOrientation().setVal(STOrientation.MIN_MAX);
ctCatAx.addNewDelete().setVal(false);
ctCatAx.addNewAxPos().setVal(STAxPos.B);
ctCatAx.addNewCrossAx().setVal(123457); //id of the val axis
ctCatAx.addNewTickLblPos().setVal(STTickLblPos.NEXT_TO);
CTValAx ctValAx = ctPlotArea.addNewValAx();
ctValAx.addNewAxId().setVal(123457); //id of the val axis
ctScaling = ctValAx.addNewScaling();
ctScaling.addNewOrientation().setVal(STOrientation.MIN_MAX);
ctValAx.addNewDelete().setVal(false);
ctValAx.addNewAxPos().setVal(STAxPos.L);
ctValAx.addNewCrossAx().setVal(123456); //id of the cat axis
ctValAx.addNewTickLblPos().setVal(STTickLblPos.NEXT_TO);
最佳答案
使用最后一个稳定版本apache poi 4.0.0，可以创建条形图，而无需使用底层的底层bean。为此，使用Package org.apache.poi.xddf.usermodel。
直到现在，XDDF的某些部分还是有问题的。所以我们需要修理一些东西。但是，尽管如此，我们应该使用这些类而不是底层的底层bean。
您的要求示例：
资源：
码：
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import org.apache.poi.ss.usermodel.WorkbookFactory;
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.AxisCrossBetween;
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 ExcelBarChartFromExistingData {
public static void main(String[] args) throws IOException {
try (XSSFWorkbook wb = (XSSFWorkbook)WorkbookFactory.create(new FileInputStream("Workbook.xlsx"))) {
XSSFSheet sheet = wb.getSheet("Sheet1");
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);
leftAxis.setCrossBetween(AxisCrossBetween.BETWEEN);
XDDFDataSource<String> xs = XDDFDataSourcesFactory.fromStringCellRange(sheet,
new CellRangeAddress(1, 3, 1, 1));
XDDFNumericalDataSource<Double> ys = XDDFDataSourcesFactory.fromNumericCellRange(sheet,
new CellRangeAddress(1, 3, 5, 5));
XDDFChartData data = chart.createData(ChartTypes.BAR, bottomAxis, leftAxis);
data.addSeries(xs, ys);
chart.plot(data);
//Since XDDF stuff is buggy until now, we need to repair something.
//repairing set the kind of bar char, either bar chart or column chart:
if (chart.getCTChart().getPlotArea().getBarChartArray(0).getBarDir() == null)
chart.getCTChart().getPlotArea().getBarChartArray(0).addNewBarDir();
chart.getCTChart().getPlotArea().getBarChartArray(0).getBarDir().setVal(
org.openxmlformats.schemas.drawingml.x2006.chart.STBarDir.COL);
//org.openxmlformats.schemas.drawingml.x2006.chart.STBarDir.BAR);
//repairing telling the axis Ids in bar chart:
if (chart.getCTChart().getPlotArea().getBarChartArray(0).getAxIdList().size() == 0) {
chart.getCTChart().getPlotArea().getBarChartArray(0).addNewAxId().setVal(bottomAxis.getId());
chart.getCTChart().getPlotArea().getBarChartArray(0).addNewAxId().setVal(leftAxis.getId());
}
//repairing no Tx when there is no title
if (chart.getCTChart().getPlotArea().getBarChartArray(0).getSerArray(0).getTx() != null)
chart.getCTChart().getPlotArea().getBarChartArray(0).getSerArray(0).unsetTx();
XDDFSolidFillProperties fill = new XDDFSolidFillProperties(XDDFColor.from(PresetColor.BLUE));
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("WorkbookNew.xlsx")) {
wb.write(fileOut);
}
}
}
}
结果：
要回答您的隐式问题，如何理解
org.openxmlformats.schemas.drawingml.x2006.chart中的类：为了了解这一点，我们需要了解
Excel如何存储其数据。 *.xlsx文件只是ZIP存档。因此，我们可以简单地解压缩它们并进行查看。在那里我们找到了
XML文件。例如，对于图表/xl/charts/chart1.xml。现在首先我们需要了解XML。然后，我们需要有关
org.openxmlformats.schemas.drawingml.x2006.chart软件包的信息。我们可以下载ooxml-schemas-1.4-sources.jar，然后执行javadoc。现在，我们为所有基础bean包含包API提供了org.openxmlformats.schemas.drawingml.x2006.chart文档。关于java - 使用apache poi和ooxml-schemas实现具有2列的条形图的最简单方法，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/53094418/