poi实现docx转pdf

要实现docx转pdf，可以使用Apache POI和Apache PDFBox两个库。具体步骤如下：

1. 使用POI读取docx文件内容

XWPFDocument document = new XWPFDocument(new FileInputStream("example.docx"));

2. 将docx内容写入PDF文件

PDDocument pdfDoc = new PDDocument();
PDFont font = PDType1Font.HELVETICA_BOLD;
PDPage page = new PDPage();
pdfDoc.addPage(page);
PDPageContentStream contentStream = new PDPageContentStream(pdfDoc, page);
contentStream.beginText();
contentStream.setFont(font, 12);
for (XWPFParagraph paragraph : document.getParagraphs()) {
    for (XWPFRun run : paragraph.getRuns()) {
        String text = run.getText(0);
        contentStream.showText(text);
    }
}
contentStream.endText();
contentStream.close();

3. 保存PDF文件

pdfDoc.save("example.pdf");
pdfDoc.close();

完整代码示例：

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import org.apache.poi.xwpf.usermodel.XWPFRun;

public class DocxToPdf {
    public static void main(String[] args) throws IOException {

        // Read docx file
        XWPFDocument document = new XWPFDocument(new FileInputStream("example.docx"));

        // Write pdf file
        PDDocument pdfDoc = new PDDocument();
        PDFont font = PDType1Font.HELVETICA_BOLD;
        PDPage page = new PDPage();
        pdfDoc.addPage(page);
        PDPageContentStream contentStream = new PDPageContentStream(pdfDoc, page);
        contentStream.beginText();
        contentStream.setFont(font, 12);
        for (XWPFParagraph paragraph : document.getParagraphs()) {
            for (XWPFRun run : paragraph.getRuns()) {
                String text = run.getText(0);
                contentStream.showText(text);
            }
        }
        contentStream.endText();
        contentStream.close();

        // Save pdf file
        pdfDoc.save("example.pdf");
        pdfDoc.close();
    }
}