1、创建license.xml文件

在项目某位置新建一个license.xml文件，并复制下面内容复制到文件里就可以了。

<License>
  <Data>
    <Products>
      <Product>Aspose.Total for Java</Product>
      <Product>Aspose.Words for Java</Product>
    </Products>
    <EditionType>Enterprise</EditionType>
    <SubscriptionExpiry>20991231</SubscriptionExpiry>
    <LicenseExpiry>20991231</LicenseExpiry>
    <SerialNumber>23dcc79f-44ec-4a23-be3a-03c1632404e9</SerialNumber>
  </Data>
  <Signature>0nRuwNEddXwLfXB7pw66G71MS93gW8mNzJ7vuh3Sf4VAEOBfpxtHLCotymv1PoeukxYe31K441Ivq0Pkvx1yZZG4O1KCv3Omdbs7uqzUB4xXHlOub4VsTODzDJ5MWHqlRCB1HHcGjlyT2sVGiovLt0Grvqw5+QXBuinoBY0suX0=</Signature>
</License>

    public static boolean getLicense() {
        boolean result = false;
        try {
            //这个地方xml文件的物理路径要写正确
            Resource resource = new ClassPathResource("license.xml");
            InputStream is = resource.getInputStream();
            License aposeLic = new License();
            aposeLic.setLicense(is);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    public static void doc2pdf(String inPath, String outPath) {
        if (!getLicense()) {
            return;
        }
        try {
            File file = new File(outPath);
            FileOutputStream os = new FileOutputStream(file);
            Document doc = new Document(inPath);
            doc.save(os, SaveFormat.DOCX);// 这里可以写你想要装换的类型：DOC, DOCX, PDF，HTML
        } catch (Exception e) {
            e.printStackTrace();
        }
    }