用PDFbox绘制饼图

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.pdmodel.graphics.color.PDColor;
import org.apache.pdfbox.pdmodel.graphics.color.PDDeviceRGB;
import org.apache.pdfbox.pdmodel.graphics.state.PDExtendedGraphicsState;

import java.io.IOException;

public class PieChartExample {
    public static void main(String[] args) throws IOException {
        // 创建一个新的PDF文档
        PDDocument document = new PDDocument();
        PDPage page = new PDPage(PDRectangle.A4);
        document.addPage(page);

        // 创建内容流
        PDPageContentStream contentStream = new PDPageContentStream(document, page);

        // 设置绘图参数
        float x = 100;
        float y = 400;
        float radius = 100;
        float[] angles = {90, 150, 120}; // 各部分的角度
        PDColor[] colors = {
                new PDColor(new float[]{1, 0, 0}, PDDeviceRGB.INSTANCE), // 红色
                new PDColor(new float[]{0, 1, 0}, PDDeviceRGB.INSTANCE), // 绿色
                new PDColor(new float[]{0, 0, 1}, PDDeviceRGB.INSTANCE)  // 蓝色
        };

        // 绘制饼图
        float startAngle = 0;
        for (int i = 0; i < angles.length; i++) {
            contentStream.setNonStrokingColor(colors[i]);
            contentStream.addArc(x, y, radius, radius, startAngle, angles[i]);
            contentStream.closeAndStroke();
            startAngle += angles[i];
        }

        // 关闭内容流
        contentStream.close();

        // 保存PDF文档
        document.save("pie_chart.pdf");
        document.close();
    }
}