使用Apache POI创建Excel折线图

package 折线图;

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

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

public class ExcelChartExample {

    public static void main(String[] args) {
        try {
            // 创建工作簿和工作表
            Workbook workbook = new XSSFWorkbook();
            Sheet sheet = workbook.createSheet('折线图');

            // 创建数据行和列
            Row row = sheet.createRow(0);
            row.createCell(0).setCellValue('X');
            row.createCell(1).setCellValue('Y');

            // 填充数据
            for (int i = 1; i <= 10; i++) {
                row = sheet.createRow(i);
                row.createCell(0).setCellValue(i);
                row.createCell(1).setCellValue(i * i);
            }

            // 创建折线图
            Drawing<?> drawing = sheet.createDrawingPatriarch();
            ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 4, 1, 10, 20);
            Chart 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
            LineChartData data = chart.getChartDataFactory().createLineChartData();
            ChartAxis bottomAxis = chart.getChartAxisFactory().createCategoryAxis(AxisPosition.BOTTOM);
            ChartAxis leftAxis = chart.getChartAxisFactory().createValueAxis(AxisPosition.LEFT);
            leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);

            // 创建数据源
            ChartDataSource<Number> xs = DataSources.fromNumericCellRange(sheet, new CellRangeAddress(1, 10, 0, 0));
            ChartDataSource<Number> ys = DataSources.fromNumericCellRange(sheet, new CellRangeAddress(1, 10, 1, 1));

            // 添加数据系列
            LineChartSeries series = data.addSeries(xs, ys);
            series.setTitle('数据折线图');

            // 绘制图表
            chart.plot(data, bottomAxis, leftAxis);

            // 保存Excel文件
            FileOutputStream fileOut = new FileOutputStream('output.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();
        }
    }
}