【技术】Spring Boot 将 Word 转换为 PDF 2.0 版本

之前写过一篇 Spring Boot 将 Word 转换为 PDF 的文章，但是有评论说导入依赖有问题，还存在依赖冲突的问题。索性再来一个完整版的代码，之前的完整版代码找不到了，又重新整理了一下，依赖导入和之前不太一样，代码写法类似。

1、导入依赖
核心依赖：

<!-- Apache POI -->
<dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>3.15</version>
</dependency><!-- PdfConverter -->
<dependency><groupId>fr.opensagres.xdocreport</groupId><artifactId>org.apache.poi.xwpf.converter.pdf</artifactId><version>1.0.6</version>
</dependency>

完整 pom.xml 文件

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.7.18</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.riu</groupId><artifactId>spring-boot-demo</artifactId><version>0.0.1-SNAPSHOT</version><name>spring-boot-demo</name><description>spring-boot-demo</description><properties><java.version>8</java.version></properties><dependencies><!-- Web 启动器 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!-- Thymeleaf 启动器 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency><!-- Apache POI --><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>3.15</version></dependency><!-- PdfConverter --><dependency><groupId>fr.opensagres.xdocreport</groupId><artifactId>org.apache.poi.xwpf.converter.pdf</artifactId><version>1.0.6</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build>
</project>

2、用于上传文件的页面

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title>
</head>
<body>
<form action="/w2p/convert" method="post" enctype="multipart/form-data"><input type="file" name="file"><input type="submit" value="转换"/>
</form>
[[${result}]]
</body>
</html>

3、控制层代码

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;@Controller
@RequestMapping("/w2p")
public class FileConversionController {/*** 跳转 w2p 页面，提交文件* @return*/@GetMappingpublic String w2p(){return "/w2p/w2p";}/*** 文件转换：word 装换为 PDF** @param file 源 word 文件* @return*/@PostMapping("/convert")public ResponseEntity<byte[]> convertWordToPdf(@RequestParam("file") MultipartFile file) {try {// 创建 word 临时文件对象File wordFile = File.createTempFile("word", ".docx");// 临时 word 文件写入磁盘file.transferTo(wordFile);// 建 pdf 临时文件对象File pdfFile = File.createTempFile("pdf", ".pdf");// 调用转换工具类WordToPdfConverter converter = new WordToPdfConverter();// 转换 PDFconverter.convertToPdf(wordFile, pdfFile);/* PDF 文件下载 */FileInputStream fis = new FileInputStream(pdfFile);byte[] bytes = new byte[fis.available()];fis.read(bytes);// 删除 word 临时文件wordFile.delete();fis.close();pdfFile.delete();// 设置下载的响应头信息HttpHeaders hh = new HttpHeaders();hh.setContentDispositionFormData("attachement", pdfFile.getName());return new ResponseEntity<byte[]>(bytes,  hh, HttpStatus.OK);/* PDF 文件下载 */} catch (IOException e) {e.printStackTrace();}return null;}
}

4、PDF 转换类

import org.apache.poi.xwpf.converter.pdf.PdfConverter;
import org.apache.poi.xwpf.usermodel.XWPFDocument;import java.io.*;public class WordToPdfConverter {public void convertToPdf(File wordFile, File pdfFile) throws IOException {InputStream inputStream = null;OutputStream outputStream = null;XWPFDocument document = null;try {// 文件输入流inputStream = new FileInputStream(wordFile);// 文件输出流outputStream = new FileOutputStream(pdfFile);document = new XWPFDocument(inputStream);PdfConverter.getInstance().convert(document, outputStream, null);} catch (IOException e){e.printStackTrace();} finally {// 释放资源document.close();outputStream.close();inputStream.close();}}
}