使用Afreechart和itextg将lineChart添加到Pdf文件

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.data.category.DefaultCategoryDataset;
import com.itextpdf.text.Document;
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfWriter;
import java.io.FileOutputStream;

public class LineChartToPdf {
    public static void main(String[] args) {
        // 创建lineChart的数据集
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.addValue(1, "Series 1", "Category 1");
        dataset.addValue(2, "Series 1", "Category 2");
        dataset.addValue(3, "Series 1", "Category 3");
        
        // 创建lineChart
        JFreeChart lineChart = ChartFactory.createLineChart(
                "Line Chart", "Category", "Value", dataset);
        
        // 创建PDF文件
        Document document = new Document();
        try {
            PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("output.pdf"));
            document.open();
            
            // 添加lineChart到PDF文件
            PdfContentByte contentByte = writer.getDirectContent();
            int width = 500;
            int height = 300;
            String chartPath = "lineChart.png";
            ChartUtilities.saveChartAsPNG(new File(chartPath), lineChart, width, height);
            Image chartImage = Image.getInstance(chartPath);
            chartImage.setAbsolutePosition(100, 500);
            chartImage.scaleToFit(400, 250);
            contentByte.addImage(chartImage);
            
            document.close();
            System.out.println("PDF file created successfully.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}