poi-tl中，表格在word中动态生成且合并单元格

param.setColumns(Arrays.asList("征集稿详情", "意见单位", "修改建议", "修改理由", "是否采纳", "意见小结"));

File file = new File(path);
// 获取模板文件流
InputStream resourceAsStream = new FileInputStream(file);

//poi-tl 配置
ConfigureBuilder builder = Configure.builder();
builder.useSpringEL(false);
Map<String, Object> map = new HashMap<>();
//创建表格并动态写入表头
RowRenderData row0 = new RowRenderData();
for (int g = 0; g < param.getColumns().size(); g++) {
    CellRenderData cell_1 = Cells.of(new TextRenderData(param.getColumns().get(g))).create();
    row0.addCell(cell_1);
}
Tables.TableBuilder tableBuilder = Tables.of(row0);


//给表格装载数据
ServerTableData serverTableData = getServerTableData(param);
List<RowRenderData> serverDataList = serverTableData.getServerDataList();
List<Map<String, Object>> groupDataList = serverTableData.getGroupDataList();
Integer mergeColumn = serverTableData.getMergeColumn(); //合并第几列，一般是0列
for (RowRenderData qiankuan : serverTableData.getServerDataList()) {
    RowRenderData row = qiankuan;
    tableBuilder.addRow(row);
}

MergeCellRule.MergeCellRuleBuilder rule = MergeCellRule.builder();

//待需要合并的行的集合
Map<MergeCellRule.Grid, MergeCellRule.Grid> mergeMap = new HashMap<>();
// 处理合并---开始
for (int i = 0; i < serverDataList.size(); i++) {
    // 获取要合并的名称那一列数据 mergeColumn代表要合并的列，从0开始
    String typeNameData = serverDataList.get(i).getCells().get(0).getParagraphs().get(0).getContents().get(0).toString();
    for (int j = 0; j < groupDataList.size(); j++) {
        String typeNameTemplate = String.valueOf(groupDataList.get(j).get("typeName"));
        int listSize = Integer.parseInt(String.valueOf(groupDataList.get(j).get("listSize")));

        //合并征集稿对象合并
        if (typeNameTemplate.equals(typeNameData) && listSize > 1) {
            mergeMap.put(MergeCellRule.Grid.of(i + 1, 0), MergeCellRule.Grid.of(i + listSize, 0));
            groupDataList.remove(j);
            break;
        }
    }
}

//将需要的合并行集合放到map中
for (Map.Entry<MergeCellRule.Grid, MergeCellRule.Grid> entry : mergeMap.entrySet()) {
    MergeCellRule.Grid mapKey = entry.getKey();
    MergeCellRule.Grid mapValue = entry.getValue();
    rule.map(mapKey, mapValue);
}
// 处理合并---结束

 tableBuilder.mergeRule(rule.build());//开始合并
    map.put("oneTable", tableBuilder.create());
    XWPFTemplate template = XWPFTemplate.compile(Objects.requireNonNull(resourceAsStream), builder.build()).render(map);
    //输出网络流
    response.setCharacterEncoding("utf-8");
    response.setContentType("application/octet-stream");
    response.setHeader("Content-disposition", "attachment;fileName=" + URLEncoder.encode(param.getDraftTitle() +"."+ param.getType(), "utf-8"));
    // HttpServletResponse response
    OutputStream out = response.getOutputStream();
    BufferedOutputStream bos = new BufferedOutputStream(out);
    template.write(bos);
    bos.flush();
    out.flush();
    PoitlIOUtils.closeQuietlyMulti(template, bos, out);

private ServerTableData getServerTableData(ExportParam param) {
    ServerTableData serverTableData = new ServerTableData();
    List<RowRenderData> serverDataList = new ArrayList<>();
    
    for (int a = 0; a < param.getResult().size(); a++) {
        List<OpinionResultVo> listVos = param.getResult().get(a).getData();
        listVos.stream().forEach(x -> {
            RowRenderData serverData = new RowRenderData();
            param.getColumns().stream().forEach(e -> {

             CellRenderData cell_1 = Cells.of(new TextRenderData(columnName(e,                     x))).center().create();
            serverData.addCell(cell_1);

            });
            serverDataList.add(serverData);
        });

    }

    serverTableData.setServerDataList(serverDataList);

    List<Map<String, Object>> groupDataList = new ArrayList<>();
    for (int b = 0; b < param.getResult().size(); b++) {
        ExportExcelVo exportExcelVo = param.getResult().get(b);
        Map<String, Object> groupData1 = new HashMap<>();
        groupData1.put("typeName", exportExcelVo.getRule());
        groupData1.put("listSize", exportExcelVo.getData().size());
        groupDataList.add(groupData1);
    }
    serverTableData.setGroupDataList(groupDataList);
    serverTableData.setMergeColumn(0);
    serverTableData.setColumns(param.getColumns());
    return serverTableData;
}

word模板例子：