向JFreeChart SVG添加标题

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.jfree.chart.ChartUtilities;

import java.awt.Font;
import java.io.File;
import java.io.IOException;

public class JFreeChartExample {
    public static void main(String[] args) {
        // 创建数据集
        PieDataset dataset = createDataset();

        // 创建JFreeChart对象
        JFreeChart chart = createChart(dataset);

        // 创建标题对象
        TextTitle title = new TextTitle("Pie Chart", new Font("Arial", Font.BOLD, 18));

        // 将标题添加到JFreeChart对象
        chart.addSubtitle(title);

        // 保存为SVG文件
        try {
            ChartUtilities.writeChartAsSVG(new File("chart.svg"), chart, 500, 300);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static PieDataset createDataset() {
        DefaultPieDataset dataset = new DefaultPieDataset();
        dataset.setValue("Category 1", 50);
        dataset.setValue("Category 2", 30);
        dataset.setValue("Category 3", 20);
        return dataset;
    }

    private static JFreeChart createChart(PieDataset dataset) {
        JFreeChart chart = ChartFactory.createPieChart(
                "Pie Chart Demo",  // chart title
                dataset,           // data
                true,              // include legend
                true,
                false
        );
        return chart;
    }
}