写一下笔记，以便在以后工作中用到：

导包：

<!--word 转 pdf-->
<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>

编写测试类： 

/**
 * 通过documents4j 实现word转pdf
 *
 * @param sourcePath 源文件地址 如 /root/example.doc
 * @param targetPath 目标文件地址 如 /root/example.pdf
 */
public static void documents4jWordToPdf(String sourcePath, String targetPath) {
    File inputWord = new File(sourcePath);
    File outputFile = new File(targetPath);
    try {
        InputStream docxInputStream = new FileInputStream(inputWord);
        OutputStream outputStream = new FileOutputStream(outputFile);
        IConverter converter = LocalConverter.builder().build();
        converter.convert(docxInputStream)
                .as(DocumentType.DOCX)
                .to(outputStream)
                .as(DocumentType.PDF).execute();
        outputStream.close();
    } catch (Exception e) {
        // log.error("[documents4J] word转pdf失败:{}", e.toString());
        System.out.println("err");
    }
}

public static void main(String[] args) {
    String sourcePath = "D:\\新建文件夹\\蒋劲豪.docx";
    String targetPath = "D:\\新建文件夹\\蒋劲豪.pdf";
    documents4jWordToPdf(sourcePath, targetPath);
}

效果：