Java 使用 Apache POI 生成 Excel 折线图并插入 Word 文档

import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.util.Units;
import org.apache.poi.xddf.usermodel.chart.*;
import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import org.apache.poi.xwpf.usermodel.XWPFRun;

import java.io.*;

public class WordChartExample {

    public static void main(String[] args) {
        try {
            // 读取Excel文件
            FileInputStream fileIn = new FileInputStream('巴新EDEVU水库数据处理表.xlsx');
            XSSFWorkbook workbook = new XSSFWorkbook(fileIn);
            XSSFSheet sheet1 = workbook.getSheet('P9');
            XSSFSheet sheet2 = workbook.getSheet('P10');

            // 创建折线图
            XDDFChart chart = createChart(sheet1, sheet2);

            // 创建Word文档
            XWPFDocument document = new XWPFDocument();

            // 添加折线图到文档
            addChartToDocument(document, chart);

            // 保存Word文档
            FileOutputStream fileOut = new FileOutputStream('温度.docx');
            document.write(fileOut);
            fileOut.close();

            System.out.println('折线图已创建并保存到Word文档中。');

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static XDDFChart createChart(XSSFSheet sheet1, XSSFSheet sheet2) {
        // 创建折线图
        XSSFWorkbook workbook = sheet1.getWorkbook();
        XSSFDrawing drawing = sheet2.createDrawingPatriarch();
        XSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 3, 9, 9, 19);
        XSSFChart chart = drawing.createChart(anchor);
        chart.setTitleText('数据折线图');
        chart.setTitleOverlay(false);

        // 设置图例位置
        XDDFChartLegend legend = chart.getOrAddLegend();
        legend.setPosition(LegendPosition.BOTTOM);

        // 创建数据系列
        XDDFCategoryAxis bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
        XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
        leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);

        // 创建数据源
        XDDFNumericalDataSource<Double> xs1 = XDDFDataSourcesFactory.fromNumericCellRange(sheet1, new CellRangeAddress(11, 85, 0, 0));
        XDDFNumericalDataSource<Double> ys1 = XDDFDataSourcesFactory.fromNumericCellRange(sheet1, new CellRangeAddress(11, 85, 2, 2));
        XDDFNumericalDataSource<Double> xs2 = XDDFDataSourcesFactory.fromNumericCellRange(sheet2, new CellRangeAddress(11, 139, 0, 0));
        XDDFNumericalDataSource<Double> ys2 = XDDFDataSourcesFactory.fromNumericCellRange(sheet2, new CellRangeAddress(11, 139, 2, 2));

        // 添加数据系列
        XDDFLineChartData data = (XDDFLineChartData) chart.createData(ChartTypes.LINE, bottomAxis, leftAxis);
        XDDFLineChartData.Series series1 = (XDDFLineChartData.Series) data.addSeries(xs1, ys1);
        series1.setTitle('P9数据折线图', null);
        XDDFLineChartData.Series series2 = (XDDFLineChartData.Series) data.addSeries(xs2, ys2);
        series2.setTitle('P10数据折线图', null);

        // 绘制图表
        chart.plot(data);

        return chart;
    }

    private static void addChartToDocument(XWPFDocument document, XDDFChart chart) throws IOException {
        // 创建一个空白段落
        XWPFParagraph paragraph = document.createParagraph();

        // 创建一个新的图表段落
        XWPFRun run = paragraph.createRun();
        run.addBreak();
        run.setText('数据折线图');
        run.addBreak();

        // 创建图表图片
        ByteArrayOutputStream chartOut = new ByteArrayOutputStream();
        chart.write(chartOut); // 使用 chart.write(OutputStream) 方法
        chartOut.close();

        // 将图表图片插入到Word文档中
        XWPFRun chartRun = paragraph.createRun();
        chartRun.addPicture(new ByteArrayInputStream(chartOut.toByteArray()), XWPFDocument.PICTURE_TYPE_PNG, 'chart.png', Units.toEMU(500), Units.toEMU(300));
    }
}