Question

当我尝试apache poi4.0的项目示例时，遇到创建条形图的问题，运行代码后，我打开xlsx文件，出现错误msg
Excel found unreadable content in 'xxx.xlsx'. Do you want to recover the contents of this workbook? If you trust the source of the workbook, click Yes.
点击yes，然后再获取一个味精
Excel was able to open the file by repairing or removing the unreadable content. Removed Part: /xl/drawings/drawing1.xml part (Drawing shape).
单击close，然后在excel中未添加任何图表，但数据正常。
然后我尝试使用lineChart和scatterChart示例，遇到同样的问题。
此错误的最可能原因是什么以及如何解决此问题？
提前致谢。：）

package org.apache.poi.xssf.usermodel.examples;

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.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.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 BarChart {

  public static void main(String[] args) throws IOException {
    try (XSSFWorkbook wb = new XSSFWorkbook()) {
      XSSFSheet sheet = wb.createSheet("barchart");
      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));
        }
      }

      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);

      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));

      XDDFChartData data = chart.createData(ChartTypes.BAR, bottomAxis, leftAxis);
      data.addSeries(xs, ys1);
      data.addSeries(xs, ys2);
      chart.plot(data);

      XDDFSolidFillProperties fill = new XDDFSolidFillProperties(XDDFColor.from(PresetColor.CHARTREUSE));
      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("ooxml-bar-chart.xlsx")) {
        wb.write(fileOut);
      }
    }
  }
}

Answer 1

新的XDDF代码缺少axIds中的barChart设置以及条形方向barDir的设置，它们可以是列的COL条形图或条形图。

在/xl/charts/chart1.xml中，这看起来像：

<c:barChart>
 <c:barDir val="bar"/>
 ...
 <c:axId val="0"/>
 <c:axId val="1"/>
</c:barChart>

用于条形图

和

<c:barChart>
 <c:barDir val="col"/>
 ...
 <c:axId val="0"/>
 <c:axId val="1"/>
</c:barChart>

用于柱形图。

添加：

...
      chart.plot(data);

      chart.getCTChart().getPlotArea().getBarChartArray(0).addNewBarDir().setVal(
       //org.openxmlformats.schemas.drawingml.x2006.chart.STBarDir.COL);
       org.openxmlformats.schemas.drawingml.x2006.chart.STBarDir.BAR);
      chart.getCTChart().getPlotArea().getBarChartArray(0).addNewAxId().setVal(bottomAxis.getId());
      chart.getCTChart().getPlotArea().getBarChartArray(0).addNewAxId().setVal(leftAxis.getId());
...

它至少会起作用。

轴设置还有其他问题。这就是为什么我说条形图创建（仅使用apache poi的高级类）尚未准备好的原因。

apache poi 4.0条形图示例不起作用

1 个答案: