Apache POI 生成 Excel 折线图 - Java 代码示例

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);
        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<Number> xs = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 10, 0, 0));
        XDDFNumericalDataSource<Number> ys = XDDFDataSourcesFactory.fromNumericCellRange(sheet, new CellRangeAddress(1, 10, 1, 1));

        // 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('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();
    }
}

}