JAVA实现WORD转PDF

要在Java中实现将Word文档转换为PDF，可以使用Apache POI和iText库。

首先，使用Apache POI读取Word文档内容并将其保存为临时文件：

FileInputStream fis = new FileInputStream("input.docx");
XWPFDocument document = new XWPFDocument(fis);
File tmpFile = File.createTempFile("word", ".docx");
FileOutputStream fos = new FileOutputStream(tmpFile);
document.write(fos);
fis.close();
fos.close();

然后，使用iText库将临时文件转换为PDF：

PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("output.pdf"));
writer.open();
PdfContentByte cb = writer.getDirectContent();
PdfImportedPage page;
document.open();
InputStream is = new FileInputStream(tmpFile);
XWPFDocument doc = new XWPFDocument(is);
List<XWPFParagraph> paragraphs = doc.getParagraphs();
for (XWPFParagraph para : paragraphs) {
    List<XWPFRun> runs = para.getRuns();
    for (XWPFRun run : runs) {
        String text = run.getText(0);
        if (text != null) {
            cb.beginText();
            cb.showText(text);
            cb.endText();
        }
    }
}
document.close();
writer.close();
is.close();

最后，删除临时文件：

tmpFile.delete();

完整的Java代码示例：

import java.io.*;
import java.util.*;
import org.apache.poi.xwpf.usermodel.*;
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;

public class WordToPdf {
    public static void main(String[] args) throws Exception {
        FileInputStream fis = new FileInputStream("input.docx");
        XWPFDocument document = new XWPFDocument(fis);

        File tmpFile = File.createTempFile("word", ".docx");
        FileOutputStream fos = new FileOutputStream(tmpFile);
        document.write(fos);
        fis.close();
        fos.close();

        Document pdfDoc = new Document();
        PdfWriter writer = PdfWriter.getInstance(pdfDoc, new FileOutputStream("output.pdf"));
        writer.open();
        pdfDoc.open();
        PdfContentByte cb = writer.getDirectContent();
        PdfImportedPage page;

        InputStream is = new FileInputStream(tmpFile);
        XWPFDocument doc = new XWPFDocument(is);
        List<XWPFParagraph> paragraphs = doc.getParagraphs();
        for (XWPFParagraph para : paragraphs) {
            List<XWPFRun> runs = para.getRuns();
            for (XWPFRun run : runs) {
                String text = run.getText(0);
                if (text != null) {
                    cb.beginText();
                    cb.showText(text);
                    cb.endText();
                }
            }
        }

        pdfDoc.close();
        writer.close();
        is.close();

        tmpFile.delete();
    }
}