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<dependency>
      <groupId>com.itextpdf</groupId>
      <artifactId>itextpdf</artifactId>
      <version>5.5.13</version>
</dependency><br><br>
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.text.Document;
 
　　// is可以从MultipartFile file  file.getInputStream()获取
 
    public static void convertToPdf(InputStream is,String outputFile) {
        try {
            // 读取Word文档
            XWPFDocument document = new XWPFDocument(is);
            // 创建PDF文档
            Document pdfDoc = new Document();
            PdfWriter.getInstance(pdfDoc, new FileOutputStream(outputFile));
            // 开始写入PDF
            pdfDoc.open();
            for (XWPFParagraph paragraph : document.getParagraphs()) {
                pdfDoc.add(new Paragraph(paragraph.getText()));
            }
            // 关闭PDF文档
            pdfDoc.close();
            // 关闭输入流
            is.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }