Excel 使用 POI 生成折线图 - Java 示例

import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFChart; import org.apache.poi.hssf.usermodel.HSSFDrawing; import org.apache.poi.hssf.usermodel.HSSFClientAnchor; import org.apache.poi.hssf.usermodel.HSSFChart; import org.apache.poi.hssf.usermodel.HSSFChartTitle; import org.apache.poi.hssf.usermodel.HSSFLegend; import org.apache.poi.hssf.usermodel.HSSFChartLegend; import org.apache.poi.hssf.usermodel.HSSFAxis; import org.apache.poi.hssf.usermodel.HSSFCategoryAxis; import org.apache.poi.hssf.usermodel.HSSFValueAxis; import org.apache.poi.hssf.usermodel.HSSFLineChartData; import org.apache.poi.hssf.usermodel.HSSFLineChartData.Series; import org.apache.poi.hssf.usermodel.HSSFDataSources; import org.apache.poi.ss.usermodel.ChartTypes; import org.apache.poi.ss.usermodel.AxisPosition; import org.apache.poi.ss.usermodel.AxisCrosses;

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.xls');
        HSSFWorkbook workbook = new HSSFWorkbook(fileIn);
        HSSFSheet sheet1 = workbook.getSheet('P9');
        HSSFSheet sheet2 = workbook.getSheet('P10');
        HSSFSheet sheet3 = workbook.getSheet('P11');

        // 创建折线图
        HSSFDrawing drawing = sheet1.createDrawingPatriarch();
        HSSFClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 4, 1, 10, 20);
        HSSFChart chart = drawing.createChart(anchor);
        HSSFChartTitle title = chart.getTitle();
        title.setText('数据折线图');
        chart.setTitle(title);
        chart.setHasTitle(true);

        // 设置图例位置
        HSSFLegend legend = chart.getOrCreateLegend();
        legend.setPosition(HSSFChartLegend.BOTTOM);

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

        // 创建数据源
        HSSFDataSources xs1 = HSSFDataSources.fromNumericCellRange(sheet1, new CellRangeAddress(11, 86, 0, 0));
        HSSFDataSources ys1 = HSSFDataSources.fromNumericCellRange(sheet1, new CellRangeAddress(11, 86, 2, 2));
        HSSFDataSources xs2 = HSSFDataSources.fromNumericCellRange(sheet2, new CellRangeAddress(11, 139, 0, 0));
        HSSFDataSources ys2 = HSSFDataSources.fromNumericCellRange(sheet2, new CellRangeAddress(11, 139, 2, 2));
        HSSFDataSources xs3 = HSSFDataSources.fromNumericCellRange(sheet3, new CellRangeAddress(11, 159, 0, 0));
        HSSFDataSources ys3 = HSSFDataSources.fromNumericCellRange(sheet3, new CellRangeAddress(11, 159, 2, 2));

        // 添加数据系列
        HSSFLineChartData data = (HSSFLineChartData) chart.createData(ChartTypes.LINE, bottomAxis, leftAxis);
        Series series1 = data.addSeries(xs1, ys1);
        series1.setTitle('数据折线图1', null);
        Series series2 = data.addSeries(xs2, ys2);
        series2.setTitle('数据折线图2', null);
        Series series3 = 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();
    }
}

}