public void testWordToPDF(HttpServletResponse response) throws Exception {        String FILE_NAME = "E:\\1111.docx";        InputStream inputStream = new FileInputStream(FILE_NAME);        InputStream is = DocxToPdf.docToPdf(inputStream);        InputStream aa = PdfWaterMark.addWaterMark(is, "admin", 10);        //将XWPFDocument文件变为MultipartFile        String reportName = "企业123";        MultipartFile multipartFile = inputStreamToCommonsMultipartFile(aa, reportName + ".pdf");　　　　        String fileName = multipartFile.getOriginalFilename();        File file = new File("E:\\"+fileName);        OutputStream out = null;        try{            //获取文件流,以文件流的方式输出到新文件            out = new FileOutputStream(file);            byte[] ss = multipartFile.getBytes();            for(int i = 0; i < ss.length; i++){                out.write(ss[i]);            }        }catch(IOException e){            e.printStackTrace();        }finally {            if (out != null){                try {                    out.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }    }

/**     *     * @param is 输入流     * @return     */    public static InputStream docToPdf(InputStream is) {        try {            WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.load(is);            Mapper fontMapper = new IdentityPlusMapper();            if(PhysicalFonts.get("SimSun") == null){                PhysicalFonts.addPhysicalFonts("SimSun", WordUtils.class.getResource("/simsun.ttc"));            }            fontMapper.put("隶书", PhysicalFonts.get("LiSu"));            fontMapper.put("宋体", PhysicalFonts.get("SimSun"));            fontMapper.put("微软雅黑", PhysicalFonts.get("Microsoft Yahei"));            fontMapper.put("黑体", PhysicalFonts.get("SimHei"));            fontMapper.put("楷体", PhysicalFonts.get("KaiTi"));            fontMapper.put("新宋体", PhysicalFonts.get("NSimSun"));            fontMapper.put("仿宋", PhysicalFonts.get("FangSong"));            fontMapper.put("幼圆", PhysicalFonts.get("YouYuan"));            fontMapper.put("方正小标宋简体", PhysicalFonts.get("SimHei"));            fontMapper.put("仿宋_GB2312", PhysicalFonts.get("SimHei"));            wordMLPackage.setFontMapper(fontMapper);            FastByteArrayOutputStream os = new FastByteArrayOutputStream();            FOSettings foSettings = Docx4J.createFOSettings();            foSettings.setWmlPackage(wordMLPackage);            Docx4J.toFO(foSettings, os, Docx4J.FLAG_EXPORT_PREFER_XSL);            return os.getInputStream();        } catch (Exception e) {            log.error("word转pdf失败==", e);            throw new RuntimeException("word转pdf失败");        }    }

/**     * pdf生成水印     * @param is    字节输入流     * @param WaterMarkContent  水印文案     * @param numberOfPage      每页需要插入的条数     * @throws Exception     */    public static InputStream addWaterMark(InputStream is, String WaterMarkContent, int numberOfPage)throws Exception {        PdfReader reader = new PdfReader(is);        FastByteArrayOutputStream os = new FastByteArrayOutputStream();        PdfStamper stamper = new PdfStamper(reader, os);        PdfGState gs = new PdfGState();        //设置字体        BaseFont font =  BaseFont.createFont("STSong-Light","UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);        // 设置透明度        gs.setFillOpacity(0.4f);        int total = reader.getNumberOfPages() + 1;        PdfContentByte content;        for (int i = 1; i < total; i++) {            content = stamper.getOverContent(i);            content.beginText();            content.setGState(gs);            //水印颜色            content.setColorFill(BaseColor.LIGHT_GRAY);            //水印字体样式和大小            content.setFontAndSize(font, 35);            //插入水印  循环每页插入的条数            for (int j = 0; j < numberOfPage; j++) {                content.showTextAligned(Element.ALIGN_CENTER, WaterMarkContent, 300, 200 * (j + 1), 30);            }            content.endText();        }        stamper.close();        return os.getInputStream();    }

<!--word 转 pdf -->        <dependency>            <groupId>org.docx4j</groupId>            <artifactId>docx4j</artifactId>            <version>${docx4j.version}</version>        </dependency>        <dependency>            <groupId>org.docx4j</groupId>            <artifactId>docx4j-export-fo</artifactId>            <version>${export.fo.version}</version>        </dependency>

参考链接:
https://blog.csdn.net/qq_26772309/article/details/127018051