如何使用Apache POI在Word文件中创建小节、小节和小节？

import org.apache.poi.xwpf.usermodel.*;

import java.io.FileOutputStream;
import java.io.IOException;

public class WordSectionsExample {
    public static void main(String[] args) throws IOException {
        // 创建一个新的Word文档
        XWPFDocument document = new XWPFDocument();

        // 创建第一个小节
        XWPFParagraph section1Paragraph = document.createParagraph();
        XWPFRun section1Run = section1Paragraph.createRun();
        section1Run.setText("Section 1");

        // 创建第一个小节的子节
        XWPFParagraph subSection1Paragraph = document.createParagraph();
        subSection1Paragraph.setIndentationFirstLine(400); // 设置首行缩进
        XWPFRun subSection1Run = subSection1Paragraph.createRun();
        subSection1Run.setText("Sub-section 1.1");

        // 创建第二个子节
        XWPFParagraph subSection2Paragraph = document.createParagraph();
        subSection2Paragraph.setIndentationFirstLine(400); // 设置首行缩进
        XWPFRun subSection2Run = subSection2Paragraph.createRun();
        subSection2Run.setText("Sub-section 1.2");

        // 创建第二个小节
        XWPFParagraph section2Paragraph = document.createParagraph();
        XWPFRun section2Run = section2Paragraph.createRun();
        section2Run.setText("Section 2");

        // 保存文档到文件
        try (FileOutputStream out = new FileOutputStream("sections_example.docx")) {
            document.write(out);
        }

        // 关闭文档
        document.close();
    }
}