Excel图表教程：使用POI库创建折线图

import org.apache.poi.ss.usermodel.*; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.apache.poi.xssf.usermodel.XSSFDrawing; import org.apache.poi.xssf.usermodel.XSSFChart; import org.apache.poi.xssf.usermodel.XSSFClientAnchor; import org.apache.poi.xssf.usermodel.XSSFLineChartData; import org.apache.poi.xssf.usermodel.XSSFLineChartData.Series; import org.apache.poi.xssf.usermodel.XSSFLineChart; import org.apache.poi.xssf.usermodel.XSSFChartLegend; import org.apache.poi.xssf.usermodel.XSSFChartAxis; import org.apache.poi.xssf.usermodel.XSSFValueAxis; import org.apache.poi.xssf.usermodel.XSSFCategoryAxis; import org.apache.poi.xssf.usermodel.XSSFChartFactory; import org.apache.poi.xssf.usermodel.XSSFChartTypes; import org.apache.poi.xssf.usermodel.XSSFDataSources; import org.apache.poi.xssf.usermodel.XSSFDataSources.ChartDataSource; import org.apache.poi.xddf.usermodel.chart.AxisCrosses; import org.apache.poi.xddf.usermodel.chart.AxisPosition; import org.apache.poi.xddf.usermodel.chart.LegendPosition;

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');
        Workbook workbook = new XSSFWorkbook(fileIn);
        Sheet sheet = workbook.getSheet('P9');

        // 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);
        ChartLegend legend = chart.getOrCreateLegend();
        legend.setPosition(LegendPosition.BOTTOM);

        // 创建数据系列
        ChartAxis bottomAxis = chart.getChartAxisFactory().createCategoryAxis(AxisPosition.BOTTOM);
        ValueAxis leftAxis = chart.getChartAxisFactory().createValueAxis(AxisPosition.LEFT);
        leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);

        // 创建数据源
        ChartDataSource<Number> xs = DataSources.fromNumericCellRange(sheet, new CellRangeAddress(11, 85, 0, 0));
        ChartDataSource<Number> ys = DataSources.fromNumericCellRange(sheet, new CellRangeAddress(11, 85, 2, 2));

        // 添加数据系列
        LineChartData data = chart.getChartDataFactory().createLineChartData();
        Series series = data.addSeries(xs, ys);
        series.setTitle('数据折线图');

        // 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();
    }
}

}