使用Apache POI生成带柱状图的Word文档，创建成功却无法打开求助

我是Apache POI、Java及Web开发的新手，使用以下代码尝试生成包含柱状图的Word文档，程序提示创建成功，但生成的文档无法打开，恳请各位提供帮助。

import java.io.FileOutputStream;
import org.apache.poi.util.Units;
import org.apache.poi.xddf.usermodel.chart.*;
import org.apache.poi.xwpf.usermodel.*;

public class BarChart {
public static void main(String[] args) throws Exception {
     XWPFDocument doc = new XWPFDocument();

    // Create a paragraph
            XWPFParagraph paragraph = doc.createParagraph();
            XWPFRun run = paragraph.createRun();
            run.setText("Bar Chart Example:");

    // Create a severitychart
            XWPFChart categoryChart = doc.createChart(10 * Units.EMU_PER_CENTIMETER, 5 * Units.EMU_PER_CENTIMETER);

    // Create chart data source
            String[] categories = new String[]{"Critical", "High", "Medium","Low","Best Practice"};
            Double[] values = new Double[]{(double) 1,(double) 2,(double) 3,(double) 4,(double) 5};
            XDDFDataSource<String> categoryDataSource = XDDFDataSourcesFactory.fromArray(categories);
            XDDFNumericalDataSource<Double> valueDataSource = XDDFDataSourcesFactory.fromArray(values);
         
 // Create the category axis
         XDDFCategoryAxis categoryAxis = categoryChart.createCategoryAxis(AxisPosition.BOTTOM);
         XDDFValueAxis valueAxis = categoryChart.createValueAxis(AxisPosition.TOP);
 
         XDDFChartData data = categoryChart.createData(ChartTypes.BAR,  categoryAxis, valueAxis);
    
    //categoryChart.setTitleText("Evoke");
    XDDFChartData.Series series = data.addSeries(categoryDataSource, valueDataSource);
    //series.setTitle("Fruit Sales", null);

    // Plot the chart
    categoryChart.plot(data);
    
    // Save the document
    FileOutputStream out = new FileOutputStream("bar_chart_document.docx");
    doc.write(out);
    out.close();
    doc.close();

    System.out.println("chart created successfully!");
}
}

内容的提问来源于stack exchange，提问作者Bharath Naidu Yenumula