apache poi_5.2.5 实现表格内，某一段单元格的复制。

实现思路

1.定位开始位置
2.从开始位置之后，在行索引集合中添加行索引下标
3.截至到结束位置。
4.对行索引集合去重，并循环行索引集合
5.利用XWPFTableRow对像的getCtRow().copy()方法，进行复制（此处复制行单元格，是为了对复制出来的行单元格做其他操作）【如果只是复制，可直接使用table.addRow(newRow, endRowIndex + i);】
6.最后输出doc

需要的依赖包

		<dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>5.2.5</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>5.2.5</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-scratchpad</artifactId><version>5.2.5</version></dependency>

实现代码

 /*** @param doc* @param count 需要循环的次数，最少1次*/public static void copyCell(XWPFDocument doc, Integer count) {if (count < 1) {return;}List<XWPFTable> tables = doc.getTables();Integer dRowIndex = null;Integer tableIndex = null;Boolean isStart = false;Boolean isEnd = false;List<Integer> rowIndexs = new LinkedList<>();for (int i = 0; i < tables.size(); i++) {XWPFTable table = tables.get(i);// 遍历表格行for (int rowIndex = 0; rowIndex < table.getRows().size(); rowIndex++) {XWPFTableRow row = table.getRow(rowIndex);// 获取行中的所有单元格List<XWPFTableCell> cells = row.getTableCells();// 遍历单元格，获取索引位置for (int cellIndex = 0; cellIndex < cells.size(); cellIndex++) {XWPFTableCell cell = cells.get(cellIndex);String cellText = cell.getText();if (isStart && !isEnd) {// 判断单元格是否包含结束标识（此标识是自定义变量）if (cellText.equalsIgnoreCase("end")) {isEnd = true;dRowIndex = rowIndex;tableIndex = i;}rowIndexs.add(rowIndex);} else {//判断单元格是否包含开始标识if (cellText.equalsIgnoreCase("start")) {isStart = true;rowIndexs.add(rowIndex);}}}}}if (isStart && isEnd && !rowIndexs.isEmpty()) {XWPFTable table = tables.get(tableIndex);List<Integer> uniqueList = rowIndexs.stream().distinct().collect(Collectors.toList());for (int j = 1; j <= count; j++) {int endRowIndex = dRowIndex;for (int i = 1; i <= uniqueList.size(); i++) {Integer index = uniqueList.get(i - 1);XWPFTableRow oldRow = table.getRow(index);//此处复制行单元格，是为了对复制出来的行单元格做编号操作。XmlObject copy = oldRow.getCtRow().copy();XWPFTableRow newRow = new XWPFTableRow((CTRow) copy, table);int finalK = j + 1;newRow.getTableCells().stream().forEach(cell -> {for (XWPFParagraph paragraph : cell.getParagraphs()) {List<XWPFRun> runs = paragraph.getRuns();for (XWPFRun run : runs) {String text = run.getText(run.getTextPosition());if (text.contains("【")) {run.setText(text.substring(0, text.length() - 1).concat(String.valueOf(finalK)).concat("】"), 0);}}}});//【如果只是复制，可直接使用table.addRow(newRow, endRowIndex + i);】table.addRow(newRow, endRowIndex + i);}dRowIndex = dRowIndex + uniqueList.size();}}}