使用Apache POI创建Excel折线图教程

import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xddf.usermodel.chart.*;
import org.apache.poi.xssf.usermodel.*;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class ExcelChartExample01 {

    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 sheet = workbook.getSheet('P9');

            // 创建折线图
            XSSFDrawing drawing = sheet.createDrawingPatriarch();
            XSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 4, 1, 10, 20);
            XSSFChart chart = drawing.createChart(anchor);
            chart.setTitleText('数据折线图');
            chart.setTitleOverlay(false);

            // 设置图例位置
            chart.getOrAddLegend().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> xs = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(11, 85, 0, 0));
            XDDFNumericalDataSource<Double> ys = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(11, 85, 2, 2));

            // 添加数据系列
            XDDFLineChartData data = (XDDFLineChartData) chart.createData(ChartTypes.LINE, bottomAxis, leftAxis);
            XDDFLineChartData.Series series = (XDDFLineChartData.Series) data.addSeries(xs, ys);
            series.setTitle('数据折线图', null);

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

            // 保存Excel文件
            FileOutputStream fileOut = new FileOutputStream('巴新EDEVU水库数据处理表.xlsx');
            workbook.write(fileOut);
            fileOut.close();

            System.out.println('折线图已创建并保存到Excel文件中。');

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