layui数据表格如何实现自动合并（代码）

var execRowspan = function(fieldName,index,flag){
 // 1为不冻结的情况，左侧列为冻结的情况
 let fixedNode = index=="1"?$(".layui-table-body")[index - 1]:(index=="3"?$(".layui-table-fixed-r"):$(".layui-table-fixed-l"));
 // 左侧导航栏不冻结的情况
 let child = $(fixedNode).find("td");
 let childFilterArr = [];
 // 获取data-field属性为fieldName的td
 for(let i = 0; i < child.length; i++){
 if(child[i].getAttribute("data-field") == fieldName){
 childFilterArr.push(child[i]);
 }
 }
 // 获取td的个数和种类
 let childFilterTextObj = {};
 for(let i = 0; i < childFilterArr.length; i++){
 let childText = flag?childFilterArr[i].innerHTML:childFilterArr[i].textContent;
 if(childFilterTextObj[childText] == undefined){
 childFilterTextObj[childText] = 1;
 }else{
 let num = childFilterTextObj[childText];
 childFilterTextObj[childText] = num*1 + 1;
 }
 }
 let canRowspan = true;
 let maxNum = 9999;
 for(let i = 0; i < childFilterArr.length; i++){
 maxNum = $(childFilterArr[i]).prev().attr("rowspan")&&fieldName!="8"?$(childFilterArr[i]).prev().attr("rowspan"):maxNum;
 let key = flag?childFilterArr[i].innerHTML:childFilterArr[i].textContent;
 let tdNum = childFilterTextObj[key];
 let curNum = maxNum<tdNum?maxNum:tdNum;
 let nextKey;

 for(let j =1;j<curNum&&(i+j<childFilterArr.length);j++){
 nextKey = flag?childFilterArr[i+j].innerHTML:childFilterArr[i+j].textContent;
 if(key!=nextKey&&curNum>1){
 canRowspan = true;
 curNum = j;
 }
 }
 if(canRowspan){
 childFilterArr[i].setAttribute("rowspan",curNum);
 if($(childFilterArr[i]).find("p.rowspan").length>0){//设置td内的p.rowspan高度适应合并后的高度
 $(childFilterArr[i]).find("p.rowspan").parent("p.layui-table-cell").addClass("rowspanParent");
 $(childFilterArr[i]).find("p.layui-table-cell")[0].style.height= curNum*38-10 +"px";
 }
 canRowspan = false;
 }else{
 childFilterArr[i].style.display = "none";
 }
 if(maxNum){
 maxNum--;
 }
 if(--childFilterTextObj[key]==0||maxNum==0||(nextKey!=undefined&&key!=nextKey)){
 canRowspan = true;
 }
 }
}
//合并数据表格行
var layuiRowspan = function(fieldNameTmp,index,flag){
 let fieldName = [];
 if(typeof fieldNameTmp == "string"){
 fieldName.push(fieldNameTmp);
 }else{
 fieldName = fieldName.concat(fieldNameTmp);
 }
 for(let i = 0;i<fieldName.length;i++){
 execRowspan(fieldName[i],index,flag);
 }
}

 <p class="box">
<table class="layui-table" id="test" lay-data="{page:true,limit:50}" lay-filter="test">
 <thead>
 <tr>
 <th lay-data="{field:'province', width:200}">省</th>
 <th lay-data="{field:'city', width:200}">市</th>
 <th lay-data="{field:'zone', width:200}">区</th>
 <th lay-data="{field:'username', width:200}">昵称</th>
 <th lay-data="{field:'joinTime', width:150}">加入时间</th>
 <th lay-data="{field:'sign', minWidth: 180}">签名</th>
 <th lay-data="{field:'8',align:'right'}">基本操作</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td>浙江</td>
 <td>杭州</td>
 <td>西湖区</td>
 <td>贤心1</td>
 <td>2016-11-28</td>
 <td>人生就像是一场修行 A</td>
 <td>
 <p class="layui-btn-group" style="overflow:visible;">
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="detail">按钮1</a>
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="edit">按钮2</a>
 </p>
 </td>
 </tr>
 <tr>
 <td>浙江</td>
 <td>这个</td>
 <td>西湖区</td>
 <td>贤心2</td>
 <td>2016-11-29</td>
 <td>人生就像是一场修行 B</td>
 <td>
 <p class="layui-btn-group" style="overflow:visible;">
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="detail">按钮1</a>
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="edit">按钮2</a>
 </p>
 </td>
 </tr>
 <tr>
 <td>浙江</td>
 <td>丽水</td>
 <td>莲都区</td>
 <td>贤心3</td>
 <td>2016-11-30</td>
 <td>人生就像是一场修行 C</td>
 <td>
 <p class="layui-btn-group" style="overflow:visible;">
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="detail">按钮1</a>
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="edit">按钮2</a>
 </p>
 </td>
 </tr>
 <tr>
 <td>浙江</td>
 <td>丽水</td>
 <td>莲都区</td>
 <td>贤心3</td>
 <td>2016-19-30</td>
 <td>人生就像是一场修行 C</td>
 <td>
 <p class="layui-btn-group" style="overflow:visible;">
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="detail">按钮1</a>
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="edit">按钮2</a>
 </p>
 </td>
 </tr>
 <tr>
 <td>浙江</td>
 <td>位置</td>
 <td>莲都区</td>
 <td>贤心3</td>
 <td>2016-11-30</td>
 <td>人生就像是一场修行 C</td>
 <td>
 <p class="layui-btn-group" style="overflow:visible;">
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="detail">按钮1</a>
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="edit">按钮2</a>
 </p>
 </td>
 </tr>
 <tr>
 <td>湖北</td>
 <td>位置</td>
 <td>莲都区</td>
 <td>贤心3</td>
 <td>2016-11-30</td>
 <td>人生就像是一场修行 C</td>
 <td>
 <p class="layui-btn-group" style="overflow:visible;">
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="detail">按钮1</a>
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="edit">按钮2</a>
 </p>
 </td>
 </tr>
 <tr>
 <td>湖北</td>
 <td>这个</td>
 <td>1区</td>
 <td>贤心3</td>
 <td>2016-11-30</td>
 <td>人生就像是一场修行 C</td>
 <td>
 <p class="layui-btn-group" style="overflow:visible;">
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="detail">按钮1</a>
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="edit">按钮2</a>
 </p>
 </td>
 </tr>
 <tr>
 <td>湖北</td>
 <td>这个</td>
 <td>1区</td>
 <td>贤心3</td>
 <td>2016-11-30</td>
 <td>人生就像是一场修行 C</td>
 <td>
 <p class="layui-btn-group" style="overflow:visible;">
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="detail">按钮1</a>
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="edit">按钮2</a>
 </p>
 </td>
 </tr>
 <tr>
 <td>湖北</td>
 <td>这个</td>
 <td>1区</td>
 <td>贤心3</td>
 <td>2016-11-30</td>
 <td>人生就像是一场修行 B</td>
 <td>
 <p class="layui-btn-group" style="overflow:visible;">
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="detail">按钮1</a>
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="edit">按钮2</a>
 </p>
 </td>
 </tr>
 <tr>
 <td>湖北</td>
 <td>这个</td>
 <td>1区</td>
 <td>贤心</td>
 <td>2016-11-30</td>
 <td>人生就像是一场修行 B</td>
 <td>
 <p class="layui-btn-group" style="overflow:visible;">
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="detail">按钮1</a>
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="edit">按钮2</a>
 </p>
 </td>
 </tr>
 <tr>
 <td>湖北</td>
 <td>这个</td>
 <td>1区</td>
 <td>贤心</td>
 <td>2016-11-30</td>
 <td>人生就像是一场修行 C</td>
 <td>
 <p class="layui-btn-group" style="overflow:visible;">
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="detail">按钮1</a>
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="edit">按钮2</a>
 </p>
 </td>
 </tr>
 <tr>
 <td>湖北</td>
 <td>这个</td>
 <td>1区</td>
 <td>贤心</td>
 <td>2016-11-30</td>
 <td>人生就像是一场修行 D</td>
 <td>
 <p class="layui-btn-group" style="overflow:visible;">
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="detail">按钮1</a>
 <a class="layui-btn layui-btn-primary layui-btn-xs" lay-event="edit">按钮2</a>
 </p>
 </td>
 </tr>
 </tbody>
</table>
 </p>

layui.use('table', function(){
 var table = layui.table;
 table.init('test',{done:function(res,curr,count){
 layuiRowspan('province',1);
 layuiRowspan(['city','zone','username','joinTime','sign'],1);//支持数组
 layuiRowspan("8",1,true);
 }
 });})