使用Apache POI将带有偏移量的页码添加到docx

XWPFDocument document = new XWPFDocument();

XWPFParagraph paragraph = document.createParagraph();
XWPFRun run = paragraph.createRun();
run.setText("Hello, World!");

// 创建自定义的CTAbstractNum对象
CTAbstractNum abstractNum = CTAbstractNum.Factory.newInstance();
// 设置页码格式和偏移量
// ...

// 创建CTPageNumber对象并关联CTAbstractNum对象
CTPageNumber pageNumber = CTPageNumber.Factory.newInstance();
pageNumber.setAbstractNumId(BigInteger.valueOf(0));
pageNumber.setNumberStart(BigInteger.valueOf(1));

// 将CTPageNumber对象添加到文档的页眉或页脚中
XWPFHeaderFooterPolicy headerFooterPolicy = document.getHeaderFooterPolicy();
if (headerFooterPolicy == null) {
    headerFooterPolicy = document.createHeaderFooterPolicy();
}
XWPFHeader header = headerFooterPolicy.createHeader(XWPFHeaderFooterPolicy.DEFAULT);
XWPFParagraph headerParagraph = header.createParagraph();
CTP ctp = headerParagraph.getCTP();
ctp.addNewFldSimple().setPgNum(pageNumber);

FileOutputStream outputStream = new FileOutputStream("output.docx");
document.write(outputStream);
outputStream.close();