引入依赖包

 <dependencies>
    
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>2.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.59</version>
        </dependency>
        
        

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.10.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>3.10.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.10.1</version>
        </dependency>
        <dependency>
            <groupId>fr.opensagres.xdocreport</groupId>
            <artifactId>org.apache.poi.xwpf.converter.core</artifactId>
            <version>1.0.6</version>
        </dependency>
        <dependency>
            <groupId>fr.opensagres.xdocreport</groupId>
            <artifactId>org.apache.poi.xwpf.converter.pdf</artifactId>
            <version>1.0.6</version>
        </dependency>
        <dependency>
            <groupId>fr.opensagres.xdocreport</groupId>
            <artifactId>fr.opensagres.xdocreport.itext.extension</artifactId>
            <version>2.0.1</version>
        </dependency>
    </dependencies>

测试代码

 package com.hjyang.doc.convert.pdf.doc.conver;

import org.apache.poi.xwpf.converter.pdf.PdfConverter;
import org.apache.poi.xwpf.converter.pdf.PdfOptions;
import org.apache.poi.xwpf.usermodel.XWPFDocument;

import java.io.*;

public class TestDoc2Pdf {

    public static void wordToPdf(String docFile,String pdfFile) throws IOException {
        XWPFDocument document;
        InputStream doc = new FileInputStream(docFile);
        document = new XWPFDocument(doc);
        PdfOptions options = PdfOptions.create();
        OutputStream out = new FileOutputStream(pdfFile);
        PdfConverter.getInstance().convert(document, out, options);
        doc.close();
        out.close();
    }

    public static void main(String[] args) {
        try {
             wordToPdf("D:/word2pdfFile/123.docx", "D:/word2pdfFile/123.pdf");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

测试样式

说明：
（1）支持中文，不需要字体转化；
（2）样式保存较好。