如何在jsp中使用JFreeChart显示折线图？

   <groupId>org.jfree</groupId>
   <artifactId>jfreechart</artifactId>
   <version>1.5.3</version>
</dependency>

<%!
private byte[] createLineChart() throws IOException {
    // 创建一个折线图的数据集
    DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    dataset.addValue(10.0, "Series 1", "Category 1");
    dataset.addValue(20.0, "Series 1", "Category 2");
    dataset.addValue(30.0, "Series 1", "Category 3");
    dataset.addValue(40.0, "Series 1", "Category 4");

    // 创建一个折线图
    JFreeChart chart = ChartFactory.createLineChart("Line Chart", "Category", "Value", dataset);

    // 将图像输出到字节数组中
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    ChartUtilities.writeChartAsPNG(out, chart, 600, 400);
    return out.toByteArray();
}
%>

<img src="data:image/png;base64,<%= Base64.getEncoder().encodeToString(createLineChart()) %>" alt="Line Chart" />