1.背景：

通过spire.doc.free将word转换成PDF时存在缺陷：只能获取前3页。获取全文另外需支付费用。

2.解决办法

使用documents4j，documents4j会保留原word文件中更多的样式，如修订模式下的差异化字体颜色、文档右侧修订记录等。

3.具体步骤

1.引入Pom

<dependency><groupId>com.documents4j</groupId><artifactId>documents4j-local</artifactId><version>1.0.3</version>
</dependency>
<dependency><groupId>com.documents4j</groupId><artifactId>documents4j-transformer-msoffice-word</artifactId><version>1.0.3</version>
</dependency>

2.  xml2pdf方法如下，xmlpath是xml文件地址，pdfPath是生成的pdf地址。

public void xml2pdf(String xmlPath,String pdfPath) throws IOException {// 参考：https://blog.csdn.net/ka3p06/article/details/125476270 通过documents4j实现InputStream docxInputStream = null;OutputStream outputStream = null;try {// 原word地址docxInputStream = new FileInputStream(xmlPath);// 转换后pdf生成地址outputStream = new FileOutputStream(pdfPath);IConverter converter = LocalConverter.builder().build();converter.convert(docxInputStream).as(DocumentType.XML).to(outputStream).as(DocumentType.PDF).execute();// 关闭converter.shutDown();// 关闭outputStream.close();// 关闭docxInputStream.close();} catch (Exception e) {System.out.println("[documents4J] word转pdf失败:" + e.toString());} finally {if (outputStream != null) {outputStream.close();}if (docxInputStream != null) {docxInputStream.close();}}}