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如何用Java导出带图表的Word文档?
2023-06-14 13:16:13 深夜i     --     --
Java 导出 Word 图表

在实际开发中,我们经常需要将数据以图表的形式展示在Word文档中,并导出给用户。本文将介绍用Java如何实现这一功能。

首先,我们需要导入POI(对Microsoft Office格式文件操作的Java API)和Apache POI XWPF(Word文档扩展程序包)的jar包。接着,我们创建一个Word文档,插入一张图表并填充数据。

以下是示例代码:


import java.io.File;

import java.io.FileOutputStream;

import org.apache.poi.xwpf.usermodel.*;

import org.apache.xmlbeans.XmlCursor;

import org.apache.xmlbeans.XmlException;

import org.openxmlformats.schemas.drawingml.x2006.chart.*;

public class ExportToWordWithChart {

 public static void main(String[] args) {

  XWPFDocument document = new XWPFDocument();

  XWPFChart chart = document.createChart(15 * Units.EMU_PER_CENTIMETER, 10 * Units.EMU_PER_CENTIMETER);

  String[] categories = {"Java", "Python", "C++"};

  Integer[] values = 50;

  String chartTitle = "Programming Language Popularity";

  String seriesTitle = "Language";

  createPieChart(chart, chartTitle, seriesTitle, categories, values);

  saveDocument(document, "ExportToWordWithChart.docx");

  System.out.println("ExportToWordWithChart.docx has been created successfully.");

 }

 private static void createPieChart(XWPFChart chart, String chartTitle, String seriesTitle,

  String[] categories, Integer[] values) {

  chart.setTitleText(chartTitle);

  XDDFChartLegend legend = chart.getOrAddLegend();

  legend.setPosition(LegendPosition.TOP_RIGHT);

  XDDFDataSource categoryData = XDDFDataSourcesFactory.fromArray(categories);

  XDDFNumericalDataSource valueData = XDDFDataSourcesFactory.fromArray(values);

  XDDFChartData data = chart.createData(ChartTypes.PIE, null, null);

  data.setVaryColors(true);

  XDDFChartData.Series series = data.addSeries(categoryData, valueData);

  series.setTitle(seriesTitle, chart.setSheetTitle(seriesTitle, 0));

  chart.plot(data);

  XDDFPieChartData pie = (XDDFPieChartData) data;

  for (int i = 0; i < pie.getSeriesCount(); i++) {

   CTDPt dPt = pie.getSeries().get(i).getDPtList().get(0);

   CTSRgbColor color = CTSRgbColor.Factory.newInstance();

   color.setVal(new byte[] { (byte)255, (byte)0, (byte)0 });

   dPt.addNewSpPr().addNewSolidFill().addNewSrgbClr().set(color);

  }

  XmlCursor cursor = chart.getCTChart().getPlotArea().getChartElements().getGraphicFrameArray(0)

   .xgetChartElement().newCursor();

  while(cursor.hasNextToken()) {

   if(XmlCursor.TokenType.STARTELEMENT.equals(cursor.toNextToken())) {

    if(cursor.getName().getLocalPart().equals("chart")) {

     cursor.toParent();

     cursor.toEndToken();

     try {

      CTChart ctChart = CTChart.Factory.parse(cursor.getObject().newInputStream());

      ctChart.addNewAutoTitleDeleted().setVal(true);

      cursor.getObject().setValue(ctChart.xmlText());

     } catch (XmlException e) {

      System.err.println(e.getMessage());

     }

    }

   }

  }

 }

 private static void saveDocument(XWPFDocument document, String filename) {

  try {

   File file = new File(filename);

   FileOutputStream outputStream = new FileOutputStream(file);

   document.write(outputStream);

   outputStream.close();

   document.close();

  } catch (Exception e) {

   System.err.println(e.getMessage());

  }

 }

}

在上述代码中,我们定义了一个名为createPieChart()的方法,它接受参数包括:XWPFChart对象、图表标题、系列标题、分类(x轴)数据、数值(y轴)数据。该方法创建了一个饼图,并将它填充了数据。除此之外,还调用了saveDocument()方法保存生成的Word文档。

现在我们来看一下如何运行这个程序。首先,我们需要在classpath中添加POI和Apache POI XWPF的jar包,然后在命令行中运行如下命令:


javac ExportToWordWithChart.java

java ExportToWordWithChart

此时,程序将在当前目录下创建一个名为ExportToWordWithChart.docx的Word文档,并在控制台输出一条消息“ExportToWordWithChart.docx has been created successfully.”。

  
  

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