将行添加到表中后，无法更改。docx文件中的行文本

Question

下面的代码有问题：

XWPFTable table = <get table somehow>;
CTRow firstRow = table.getRow(0).getCtRow();

for (int i = 0; i < data.getRowCount(); i++) {
    CTRow ctRow = (CTRow) firstRow.copy();
    XWPFTableRow row = new XWPFTableRow(ctRow, table);
    XWPFRun[] cellRuns = row.getTableCells()
            .stream()
            .map(c -> c.getParagraphs().get(0))
            .map(p -> p.getRuns().isEmpty() ? p.createRun() : p.getRuns().get(0))
            .toArray(XWPFRun[]::new);
    for (int j = 0; j < cellRuns.length; j++) {
        cellRuns[j].setText(data.getValueAt(i, j).toString(), 0);
    }
    table.addRow(row);
}


table.getRow(1).getTableCells()
.get(0).getParagraphs()
.get(0).getRuns()
.get(0).setText("FooBar", 0); //change text in some added row

此代码多次复制表的第一行，然后从data复制值。工作非常好（除了文本样式），除了最后一个操作符，它应该改变一些添加的表格行中的文本。此外，“foobar”字符串甚至不会出现在创建的WORD文档的document.xml中。我没有从debug中看到任何线索，因为table.addrow（row）；操作符似乎只是将row指针复制到它的内部行列表。此外，我在更改已存在的行时也没有遇到问题。你知道为什么会这样吗？

Answer 1

若要重现此问题，请在source.docx中设置第一个表，该表至少有两行。

然后运行以下代码：

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

import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTRow;

public class WordInsertTableRow {

 static XWPFTableRow insertNewTableRow(XWPFTableRow sourceTableRow, int pos) throws Exception {
  XWPFTable table = sourceTableRow.getTable();
  CTRow newCTRrow = CTRow.Factory.parse(sourceTableRow.getCtRow().newInputStream());
  XWPFTableRow tableRow = new XWPFTableRow(newCTRrow, table);
  table.addRow(tableRow, pos);
  return tableRow;
 }

 static void commitTableRows(XWPFTable table) {
  int rowNr = 0;
  for (XWPFTableRow tableRow : table.getRows()) {
   table.getCTTbl().setTrArray(rowNr++, tableRow.getCtRow());
  }
 }

 public static void main(String[] args) throws Exception {

  XWPFDocument doc = new XWPFDocument(new FileInputStream("source.docx"));
  boolean weMustCommitTableRows = false;

  XWPFTable table = doc.getTableArray(0);

  // insert new row, which is a copy of row 2, as new row 3:
  XWPFTableRow sourceTableRow = table.getRow(1);
  XWPFTableRow newRow3 = insertNewTableRow(sourceTableRow, 2);

  // now changing something in that new row:
  int i = 1;
  for (XWPFTableCell cell : newRow3.getTableCells()) {
   for (XWPFParagraph paragraph : cell.getParagraphs()) {
    for (XWPFRun run : paragraph.getRuns()) {
     run.setText("New row 3 run " + i++, 0);
    }
   }
  }
System.out.println(newRow3.getCtRow()); // was changed
System.out.println(table.getRow(2).getCtRow()); // even this is changed
System.out.println(table.getCTTbl().getTrArray(2)); // but this was not changed, why not?
  weMustCommitTableRows = true;

  if (weMustCommitTableRows) commitTableRows(table); // now it is changed

  FileOutputStream out = new FileOutputStream("result.docx");
  doc.write(out);
  out.close();
  doc.close();

 }
}

此代码创建第二行的副本，并将其作为表中的第三行插入。然后它确实在新的第三排改变了一些东西。