Java Apache POI 创建 Excel 折线图教程

本教程将演示如何使用 Java Apache POI 库在 Excel 文件中创建折线图。

准备工作

在开始之前，请确保你已经设置好以下内容：

• 安装 Java: 确保你的系统上安装了 Java 开发环境。* 添加 Apache POI 库: 将 Apache POI 库添加到你的项目中。你可以下载 JAR 文件并手动添加到你的项目构建路径中，或者使用 Maven 或 Gradle 等构建工具管理依赖项。

代码示例javaimport 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); // 修改后的代码

        // 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();        }