Office 2007 之后使用 XML 格式来存储文档数据，这个变化其实是非常不错的。如何操作这些XML生成文件呢？或许你还在使用 POI，也有可能你在使用已经放弃更新的 iText （只是doc已经放弃更新，PDF持续更新），但是我觉得，你可以选择使用 Docx4j，这是个不错的开源软件，国内很少使用而已。

下面就简单的使用 docx4j添加页码的代码做一个简单的介绍。

/*** 创建页脚（分页信息）*/public static void createFooter(WordprocessingMLPackage wordMLPackage) throws Exception {Relationship relationship = DocxUtil.createFootPart(wordMLPackage);DocxUtil.createFootReference(wordMLPackage, relationship);}/*** 创建页脚的组件*/public static Relationship createFootPart(WordprocessingMLPackage wordprocessingMLPackage)throws Exception {FooterPart footerPart = new FooterPart();Relationship rel = wordprocessingMLPackage.getMainDocumentPart().addTargetPart(footerPart);// After addTargetPart, so image can be added properlyfooterPart.setJaxbElement(createFooterPageNr());return rel;}/*** 创建页脚的组件*/public static void createFootReference(WordprocessingMLPackage wordprocessingMLPackage,Relationship relationship)throws InvalidFormatException {ObjectFactory factory = Context.getWmlObjectFactory();List<SectionWrapper> sections = wordprocessingMLPackage.getDocumentModel().getSections();SectPr sectPr = sections.get(sections.size() - 1).getSectPr();// There is always a section wrapper, but it might not contain a sectPrif (sectPr == null) {sectPr = factory.createSectPr();wordprocessingMLPackage.getMainDocumentPart().addObject(sectPr);sections.get(sections.size() - 1).setSectPr(sectPr);}// footer referencesFooterReference footerReference = factory.createFooterReference();footerReference.setId(relationship.getId());footerReference.setType(HdrFtrRef.DEFAULT);sectPr.getEGHdrFtrReferences().add(footerReference);}/*** 添加页脚，带有页码** @return 页脚对象*/public static Ftr createFooterPageNr() {ObjectFactory factory = Context.getWmlObjectFactory();Ftr ftr = factory.createFtr();P paragraph = factory.createP();RPr fontRPr = getRPr("宋体", "000000", "20", STHint.EAST_ASIA, false);R run = factory.createR();run.setRPr(fontRPr);paragraph.getContent().add(run);paragraph.getContent().add(getTextField("第"));paragraph.getContent().add(getFieldBegin());paragraph.getContent().add(getPageNumberField());paragraph.getContent().add(getFieldEnd());paragraph.getContent().add(getTextField("页"));paragraph.getContent().add(getTextField(" 总共"));paragraph.getContent().add(getFieldBegin());paragraph.getContent().add(getTotalPageNumberField());paragraph.getContent().add(getFieldEnd());paragraph.getContent().add(getTextField("页"));setCellContentStyle(paragraph, JcEnumeration.CENTER);ftr.getContent().add(paragraph);return ftr;}

生成 docx 文档，这个代码来自Git

    public static void main(String[] args) throws Exception {WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.createPackage();MainDocumentPart mdp = wordMLPackage.getMainDocumentPart();//        mdp.addParagraphOfText("hello world");
//      mdp.addParagraphOfText("welcome");mdp.addStyledParagraphOfText("Title","hello world");mdp.addStyledParagraphOfText("Subtitle","welcome");mdp.addParagraphOfText("today is good day . welcome all students come here.");ProtectDocument protection = new ProtectDocument(wordMLPackage);protection.restrictEditing(STDocProtect.READ_ONLY, "foobaa");DocxUtil.createFooter(wordMLPackage);String filename = System.getProperty("user.dir") + "/OUT_hello.docx";Docx4J.save(wordMLPackage, new java.io.File(filename), Docx4J.FLAG_SAVE_ZIP_FILE);System.out.println("Saved " + filename);}