1、依赖,或者直接下载aspose-words-15.8.0-jdk16-Java文档类资源-CSDN下载亲测可用更多下载资源、学习资料请访问CSDN下载频道.https://download.csdn.net/download/weixin_44364444/85500059，通过（project Structrue——Modeules——右边的Dependecies）把包引进来。通过这种方式引入aspose-words,pom中就无需引入

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>wordToPdf</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>3.0.7.RELEASE</version>
        </dependency>
    </dependencies>

</project>

2、证书 resource根目录下 license.xml

<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>8bfe198c-7f0c-4ef8-8ff0-acc3237bf0d7</SerialNumber>
    </Data>
    <Signature>
        sNLLKGMUdF0r8O1kKilWAGdgfs2BvJb/2Xp8p5iuDVfZXmhppo+d0Ran1P9TKdjV4ABwAgKXxJ3jcQTqE/2IRfqwnPf8itN8aFZlV3TJPYeD3yWE7IT55Gz6EijUpC7aKeoohTb4w2fpox58wWoF3SNp6sK6jDfiAUGEHYJ9pjU=
    </Signature>
</License>

3、工具类

package com.xxh;

import com.aspose.words.Document;
import com.aspose.words.License;
import com.aspose.words.SaveFormat;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * @author xxh
 * @date 2022/5/30 14:05
 */
public class Word2PdfAsposeUtil {

    /**
     *
     * @return
     */
    public static boolean getLicense() {
        boolean result = false;
        InputStream is = null;
        try {
            Resource resource = new ClassPathResource("license.xml");
            is = resource.getInputStream();
            License aposeLic = new License();
            aposeLic.setLicense(is);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return result;
    }

    /**
     * @return boolean
     * @Param [inPath, outPath]
     **/
    public static boolean doc2pdf(String inPath, String outPath) {
        // 验证License 若不验证则转化出的pdf文档会有水印产生
        if (!getLicense()) {
            return false;
        }
        FileOutputStream os = null;
        try {
            long old = System.currentTimeMillis();
            // 新建一个空白pdf文档
            File file = new File(outPath);
            os = new FileOutputStream(file);
            // Address是将要被转化的word文档
            Document doc = new Document(inPath);
            // 全面支持DOC, DOCX, OOXML, RTF HTML, OpenDocument, PDF,
            doc.save(os, SaveFormat.PDF);
            // EPUB, XPS, SWF 相互转换
            long now = System.currentTimeMillis();
            // 转化用时
            System.out.println("pdf转换成功，共耗时：" + ((now - old) / 1000.0) + "秒");
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        } finally {
            if (os != null) {
                try {
                    os.flush();
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return true;
    }
}

4.测试类

import com.xxh.Word2PdfAsposeUtil;

import java.io.File;
import java.io.IOException;

/**
 * @author xxh
 * @date 2022/5/30 14:15
 */
public class Test {
    public static void main(String[] args) {
        String sourcePath="D:\\code\\wordToPdf\\src\\main\\resources\\Java知识点复习.docx";
        String distPath="D:\\code\\wordToPdf\\src\\main\\resources\\Java知识点复习temp.pdf";
        try {
            File file = new File(distPath);
            if(!file.exists()){
                file.createNewFile();
            }
            Word2PdfAsposeUtil.doc2pdf(sourcePath,distPath);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

效果如图：

后缀名加上.pdf就可以了。控制台红色部分出现的原因：由于aspose比较吃内存，操作大一点的文件就会堆溢出，所以请先设置好java虚拟机参数：-Xms1024m -Xmx1024m(参考值)