arcgis for js开发之路径分析

//方法封装
function routeplan(x1, x2, y1, y2, barrierPathArray, isDraw, callback) {
    require([
        "esri/symbol/SimpleLineSymbol",
        "esri/Color",
        "esri/tasks/RouteTask",
        "esri/tasks/FreatureSet",
        "esri/tasks/RouteParameters"
    ], function () {
        var routeServerUrl = url;//对应道路图层的服务图层
        var routeGraphicLayer = new GraphicLayer(map, layerName);
        routeGraphicLayer.clear();//每规划一次删除对应图层
        var map = map;
        var wkid = 5555;
        //起点
        var ptStart = new esri.geometry.Point(parseFloat(x1), parseFloat(y1), new esri.SpatialReference({ wkid: wkid }));
        //终点
        var ptEnd = new esri.geometry.Point(parseFloat(x2), parseFloat(y2), new esri.SpatialReference({ wkid: wkid }));
        var startPtGra = new esri.Graphic(ptStart);
        var endPtGra = new esri.Graphic(ptEnd);
        //设置路径样式
        var routeSymbol = new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color([1, 2, 3, 1], 5));//说明：rgb透明度，线宽
        //起点、终点尾部样式
        var routeSymbolDef = new esri.symbol.SimpleLineSymbol(new esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color([2, 3, 4, 5], 2));
        var routeTask = new esri.tasks.RouteTask(routeServerUrl);
        var routeParams = new esri.tasks.routeParameters();
        //设置参数
        routeParams.outSpatialReference = { wkid: wkid };
        routeParams.retuenDirection = true;
        routeParams.directionsLengthUnits = esri.Units.METERS;
        routeParams.stops = new esri.tasks.FeatureSet();
        routeParams.stops.features.push(startPtGra);
        routeParams.stops.features.push(endPtGra)
        route = JSON.stringify(barrierPathArray);
        var temp = jQuery.parseJSON(route);
        var array = [];
        $.each(temp, function (i, v) {
            var point = [v[0], item[1]];
            array.push(point);
        });
        //设置路障参数
        if (array.length > 0) {
            var barrierRoute = new esri.geometry.Polyline(new esri.SpatialReference({ wkid: wkid }));
            var barriersGraphic = new esri.Graphic(barrierRoute);
            routeParams.PolylineBarriers = new esri.tasks.FeatureSet();
            routeParams.PolylineBarriers.features.push(barriersGraphic);
        }
        if (routeParams.stops.features.length == 0) {
            alert("参数不全，无法分析");
            return;
        }
        routeTask.solve(routeParams,function(solveResult){
            if(callback){
                callback(solveResult);
            }
            var routeResults=solveResult.routeResults;
            var res=routeResults.length;
            if9(isDraw=="false"){
                return;
            }
            if(res>0){
                for(var i=0;i<res;i++){
                    var graphicroute=routeResults[i];
                    var graphic=graphicroute.route;
                    graphic.setSymbol(routeSymbol);
                    routeGraphicLayer.add(graphic);
                    //连接路线起点、终点、对应的定位起点、终点
                    var paths=graphic.geometry.paths[0];
                    var routeStr=paths[0];
                    var routeEnd=paths[paths.length-1];
                    var routeStrline=new esri.geometry.Polyline([[x1,y1],routeStr],new esri.SpatialReference({wkid:wkid}));
                    var routeEndline=new esri.geometry.Polyline([[x2,y2],routeEnd],new esri.SpatialReference({wkid:wkid}));
                    var strlinegraphic=new esri.Graphic(routeStrline,routeSymbolDef);
                    var endlinegraphic=new esri.Graphic(routeEndline,routeSymbolDef);
                    routeGraphicLayer.add(strlinegraphic);
                    routeGraphicLayer.add(endlinegraphic);
                }
            }
            else{
                alert("结果为空");
            }
        },function(errpr){
            alert(errpr);
        });      
}