arcgis 坐标数组渲染成线

Arcgis for js 3.19

条件：从数据库去坐标，渲染成线。

 var data = obj.data;
 var location = data.location;
 var arr = location.split(';');
 var lineArr = [];
//从数据库中拿到数据，获取lcoation，进行拆分。
 for(var i=0;i<=arr.length-1;i++)
 {
     var xy = arr[i];
     var points = xy.split(',');
     lineArr.push(points);
 }
//将坐标转换为数组的数组，格式[[x,y],[x,y],[x,y]]
 var sum1=parseFloat(0);
 var sum2=parseFloat(0);
 for(var i = 0; i < lineArr.length; i++){
     sum1 =sum1 + parseFloat(lineArr[i][0]);
     sum2 += parseFloat(lineArr[i][1]);
 }
 var mean1  = sum1 / lineArr.length;
 var mean2  = sum2 / lineArr.length;
//获取中心点坐标，比较蠢的方式
 var polylineJson = {
     "paths":lineArr,
     "spatialReference":{"wkid":4490}
 };
//塞入数据和坐标系
 var polyline = new esri.geometry.Polyline(polylineJson);
//新建图形geometry

var symbol = new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color([255,125,0]), 2);//线的样式

 var pt = new esri.geometry.Point([mean1,mean2],new esri.SpatialReference({ wkid: 4490 }));//中心坐标点

 map.infoWindow.hide();//隐藏上一个弹出框
 map.infoWindow.resize(320, 400);//设置弹出框大小
 var attr = {
     "name":data.name,
     "describe":data.describe,
     "status":data.status,
 };//塞数据

 clearTLayer('hlgc');//清除高亮

 var gcLayer = new esri.layers.GraphicsLayer({id:'hlgc'});
 map.addLayer(gcLayer);
 var g = new esri.Graphic(polyline, symbol,attr,null);
 gcLayer.add(g);
 map.infoWindow.setTitle(data.name);

 var contentHtm = getInfoTemplateContentChart(g);
 map.infoWindow.setContent(contentHtm);//弹出模板

 var  pl = g.geometry.getExtent().getCenter();
 map.centerAndZoom(pt,10);
 map.infoWindow.show(pt);
 gcLayer.clear();