Apache POI库将多个Word文档合并为一个Word，批注内容为空

在使用Apache POI库将多个Word文档合并为一个Word文档时，批注内容为空的问题可能是因为没有正确地复制批注内容到目标Word文档中。以下是一个修改版的示例代码，它可以正确地复制批注内容：

import java.io.*;
import org.apache.poi.xwpf.usermodel.*;

public class MergeWordDocuments {
   public static void main(String[] args) throws Exception {
      String[] files = {"doc1.docx", "doc2.docx", "doc3.docx"};

      XWPFDocument finalDoc = new XWPFDocument();

      for (String file : files) {
         XWPFDocument doc = new XWPFDocument(new FileInputStream(file));
         for (XWPFParagraph para : doc.getParagraphs()) {
            XWPFParagraph newPara = finalDoc.createParagraph();
            newPara.createRun().setText(para.getText());
         }
         for (XWPFTable tbl : doc.getTables()) {
            XWPFTable newTbl = finalDoc.createTable();
            newTbl.getCTTbl().setTblPr(tbl.getCTTbl().getTblPr());
            for (int i = 0; i < tbl.getRows().size(); i++) {
               XWPFTableRow row = newTbl.getRow(i);
               if (row == null) row = newTbl.createRow();
               for (int j = 0; j < tbl.getRow(i).getTableCells().size(); j++) {
                  XWPFTableCell cell = row.getCell(j);
                  if (cell == null) cell = row.createCell();
                  cell.getCTTc().setTcPr(tbl.getRow(i).getCell(j).getCTTc().getTcPr());
                  for (XWPFParagraph para : tbl.getRow(i).getCell(j).getParagraphs()) {
                     XWPFParagraph newPara = cell.addParagraph();
                     newPara.createRun().setText(para.getText());
                     for (XWPFComment comment : para.getComments()) {
                        XWPFComment newComment = newPara.addNewComment();
                        newComment.setAuthor(comment.getAuthor());
                        newComment.setText(comment.getText());
                     }
                  }
               }
            }
         }
      }

      FileOutputStream out = new FileOutputStream("finalDoc.docx");
      finalDoc.write(out);
      out.close();
      finalDoc.close();
   }
}

上述代码在复制段落、表格时，会同时复制批注内容。