之前使用dom4j转换，依赖office；
 网上还有Apache poi和itextpdf方式，尝试后发现复杂word，比如包含表格曲线等支持性不好。
 最后发现 LibreOffice：不依赖office，免费，可跨平台
参考链接：
https://developer.aliyun.com/article/1629006

https://blog.csdn.net/u013984781/article/details/144430991

1、下载LibreOffice

https://zh-cn.libreoffice.org/download/libreoffice/

2、代码

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;public class WordToPdfConverter {//LibreOffice的安装路径（如果环境变量已经配置，则不需要此路径）private static final String LIBREOFFICE_PATH = "/path/to/libreoffice"; //例如： "/usr/bin/libreoffice" 或 "C:\\Program Files\\LibreOffice\\program\\soffice.exe"public static void main(String[] args) {String inputFilePath = "path/to/your/input.docx";String outputFilePath = "path/to/your/output.pdf";convertWordToPdf(inputFilePath, outputFilePath);}public static void convertWordToPdf(String inputFilePath, String outputFilePath) {File inputFile = new File(inputFilePath);File outputFile = new File(outputFilePath);if (!inputFile.exists()) {System.err.println("Input file does not exist: " + inputFilePath);return;}// 构建LibreOffice命令行指令StringBuilder command = new StringBuilder();if (LIBREOFFICE_PATH != null && !LIBREOFFICE_PATH.isEmpty()) {command.append(LIBREOFFICE_PATH).append(" --headless ");} else {command.append("soffice --headless ");}command.append("--convert-to pdf ").append("--outdir ").append(outputFile.getParent()).append(" ").append(inputFilePath);try {// 执行系统命令Process process = Runtime.getRuntime().exec(command.toString());// 读取命令执行的输出和错误流（可选）BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));String line;while ((line = reader.readLine()) != null) {System.out.println(line);}BufferedReader errorReader = new BufferedReader(new InputStreamReader(process.getErrorStream()));while ((line = errorReader.readLine()) != null) {System.err.println(line);}// 等待进程结束int exitCode = process.waitFor();if (exitCode == 0) {System.out.println("Conversion successful: " + outputFilePath);} else {System.err.println("Conversion failed with exit code: " + exitCode);}} catch (IOException | InterruptedException e) {e.printStackTrace();}}
}