Spring Boot 如何将 Word 转换为 PDF

<dependencies>
  <!-- Apache POI -->
  <dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.1.2</version>
  </dependency>
  <!-- Apache PDFBox -->
  <dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox</artifactId>
    <version>2.0.25</version>
  </dependency>
</dependencies>

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 {
        try (InputStream in = new FileInputStream(wordFile);
             OutputStream out = new FileOutputStream(pdfFile)) {
            XWPFDocument document = new XWPFDocument(in);
            PdfConverter.getInstance().convert(document, out, null);
        }
    }
}

import org.springframework.stereotype.Service;
@Service
public class FileConversionService {
    private final WordToPdfConverter converter;
    public FileConversionService(WordToPdfConverter converter) {
        this.converter = converter;
    }
    public void convertWordToPdf(File wordFile, File pdfFile) throws IOException {
        converter.convertToPdf(wordFile, pdfFile);
    }
}

import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.io.IOException;
@RestController
public class FileConversionController {
    private final FileConversionService conversionService;
    public FileConversionController(FileConversionService conversionService) {
        this.conversionService = conversionService;
    }
    @PostMapping("/convert")
    public String convertWordToPdf(@RequestParam("file") MultipartFile file) {
        try {
            File wordFile = File.createTempFile("word", ".docx");
            file.transferTo(wordFile);
            File pdfFile = File.createTempFile("pdf", ".pdf");
            conversionService.convertWordToPdf(wordFile, pdfFile);
            // 返回PDF文件路径或其他相关信息
            return pdfFile.getAbsolutePath();
        } catch (IOException e) {
            e.printStackTrace();
            // 错误处理
            return "转换失败：" + e.getMessage();
        }
    }
}