如何使用java生成 Excel 股票图？

要使用Java生成Excel股票图，可以使用POI库来操作Excel文件，使用JFreeChart库来生成股票图。

首先，确保已经添加了以下依赖库：

• Apache POI
• JFreeChart
• JCommon

下面是一个简单的示例代码，用于生成一个包含股票图的Excel文件：

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtils;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.CandlestickRenderer;
import org.jfree.data.xy.DefaultHighLowDataset;

import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;

public class ExcelStockChart {
    public static void main(String[] args) throws IOException {
        // 创建一个新的Excel工作簿
        Workbook workbook = new XSSFWorkbook();
        Sheet sheet = workbook.createSheet("Stock Data");

        // 创建股票数据，这里的数据是示例数据，实际应用中需要替换成真实的股票数据
        Object[][] stockData = {
                {new Date(119, 0, 1), 100.0, 105.0, 95.0, 98.0},
                {new Date(119, 0, 2), 95.0, 110.0, 92.0, 105.0},
                {new Date(119, 0, 3), 105.0, 120.0, 100.0, 110.0},
                {new Date(119, 0, 4), 110.0, 115.0, 105.0, 112.0},
                {new Date(119, 0, 5), 112.0, 118.0, 108.0, 115.0}
        };

        // 创建股票数据集
        DefaultHighLowDataset dataset = new DefaultHighLowDataset(
                "Stock Data",
                stockData.length,
                new String[]{"Date", "Open", "High", "Low", "Close"},
                stockData
        );

        // 创建股票图
        JFreeChart chart = ChartFactory.createCandlestickChart(
                "Stock Chart",
                "Date",
                "Value",
                dataset,
                false
        );

        // 设置股票图的属性
        XYPlot plot = (XYPlot) chart.getPlot();
        CandlestickRenderer renderer = (CandlestickRenderer) plot.getRenderer();
        renderer.setUseOutlinePaint(true);
        DateAxis dateAxis = (DateAxis) plot.getDomainAxis();
        dateAxis.setDateFormatOverride(new java.text.SimpleDateFormat("yyyy-MM-dd"));

        // 将股票图绘制到Excel文件中
        int width = 600;
        int height = 400;
        ChartUtils.writeChartAsPNG(new FileOutputStream("stock_chart.png"), chart, width, height);

        // 将PNG图像插入到Excel文件中
        Drawing<?> drawing = sheet.createDrawingPatriarch();
        ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 1, 10, 20);
        Picture picture = drawing.createPicture(anchor, workbook.addPicture(
                ChartUtils.encodeAsPNG(chart.createBufferedImage(width, height)), Workbook.PICTURE_TYPE_PNG
        ));
        picture.resize();

        // 保存Excel文件
        FileOutputStream fileOut = new FileOutputStream("stock_chart.xlsx");
        workbook.write(fileOut);
        fileOut.close();

        System.out.println("Excel股票图生成成功！");
    }
}

上述代码将生成一个包含股票图的Excel文件，并保存为"stock_chart.xlsx"。图表的数据可以根据实际情况进行修改，具体的图表设置可以根据需求进行调整。