Apache POI Excel 折线图 - Java 代码示例

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 ExcelChartExample02 {

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
        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);

        // 创建'温度'工作表
        XSSFSheet sheet3 = workbook.createSheet('温度');

        // 将图表复制到'温度'工作表
        XSSFDrawing drawing2 = sheet3.createDrawingPatriarch();
        XSSFClientAnchor anchor2 = drawing2.createAnchor(0, 0, 0, 0, 0, 0, 10, 20);
        chart.plot(data, drawing2, anchor2);

        // 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();
    }
}

}

java: 无法将类 org.apache.poi.xddf.usermodel.chart.XDDFChart中的方法 plot应用到给定类型; 需要: org.apache.poi.xddf.usermodel.chart.XDDFChartData 找到: org.apache.poi.xddf.usermodel.chart.XDDFLineChartData,org.apache.poi.xssf.usermodel.XSSFDrawing,org.apache.poi.xssf.usermodel.XSSFClientAnchor 原因: 实际参数列表和形式参数列表长度不同 解决办法内容：根据错误提示，plot方法需要的参数类型是XDDFChartData，而实际传入的是XDDFLineChartData、XSSFDrawing和XSSFClientAnchor。这说明plot方法的参数传递有误。

要解决这个问题，可以尝试使用不同的plot方法，或者检查导入的包是否正确。可以参考官方文档或其他资源，查看plot方法的正确使用方式。