使用Apache POI库在Excel中创建折线图

折线图;

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 ExcelChartExample {

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.xls");
        XSSFWorkbook workbook = new XSSFWorkbook(fileIn);
        XSSFSheet sheet1 = workbook.getSheet("P9");
        XSSFSheet sheet2 = workbook.getSheet("P10");
        XSSFSheet sheet3 = workbook.getSheet("P11");

        // 创建折线图
        XSSFDrawing drawing = sheet1.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> xs1 = XDDFDataSourcesFactory.fromNumericCellRange(sheet1, new CellRangeAddress(11, 86, 0, 0));
        XDDFNumericalDataSource<Double> ys1 = XDDFDataSourcesFactory.fromNumericCellRange(sheet1, new CellRangeAddress(11, 86, 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));
        XDDFNumericalDataSource<Double> xs3 = XDDFDataSourcesFactory.fromNumericCellRange(sheet3, new CellRangeAddress(11, 159, 0, 0));
        XDDFNumericalDataSource<Double> ys3 = XDDFDataSourcesFactory.fromNumericCellRange(sheet3, new CellRangeAddress(11, 159, 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("数据折线图1", null);
        XDDFLineChartData.Series series2 = (XDDFLineChartData.Series) data.addSeries(xs2, ys2);
        series2.setTitle("数据折线图2", null);
        XDDFLineChartData.Series series3 = (XDDFLineChartData.Series) data.addSeries(xs3, ys3);
        series3.setTitle("数据折线图3", 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.xls");
        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();
    }
}

}