默认展开ztree树形菜单

var setting = {
        view: {
            selectedMulti: false //按住ctrl是否可以多选
        },
        check: {
            enable: true
            , chkStyle: 'checkbox'
        },
        data: {
            simpleData: {
                enable: true
            }
        },
        async: {
            enable: true
            ,type:"post"
            ,url:commandExec.ztreeDftUrl
            ,dataFilter:function (treeId, parNode, jsonData) {
                return commandExec.replaceIcon(treeId, jsonData);
            }
        },
        callback: {
            //禁止节点被选中
            beforeClick:function () {
                return false;
            },
            onCheck:function (e, treeId, treeNode) {
                var treeNode = commandExec.onlyCheckedDevice(treeId,treeNode);
                commandExec.setDeviceBoxValue(treeNode);
            },
            onAsyncSuccess:function (e, treeId, treeNode, nodes) {
                if(JSON.parse(nodes).length>0){
 
                }else{
                    layer.alert("暂无数据！");
                    return;
                }
            }
        }
    };

/**
     * 跟换小图标
     * */
    commandExec.replaceIcon = function(treeId, jsonData){
        var treeObj = $.fn.zTree.getZTreeObj(treeId);
        if(jsonData.length>0){
            if(jsonData){
                for(var i in jsonData){
                    var node = jsonData[i];
                    if(String(node.id).indexOf("tower") >= 0){
                        node.icon =  Electric.ctxPath+"/static/img/icon-tower.png";
                        //展开
                        node.open = true;
                    }else if(String(node.id).indexOf("org") >= 0){
                        node.icon = Electric.ctxPath+"/static/img/icon-company.png";
                        node.open = true;
                    }else if(String(node.id).indexOf("line") >= 0){
                        node.icon = Electric.ctxPath+"/static/img/icon-line.png";
                        node.open = true;
                    }else if(String(node.id).indexOf("device") >= 0){
                        node.icon = Electric.ctxPath+"/static/img/icon-device.png";
                    }
                }
            }
        }
        return jsonData;
    };

//展开选中节点
var expandCheckedNode = function(){
   //获取所有选中状态的节点
   var checkedNodes = zTreeObj.getCheckedNodes(true);
   for(var i in checkedNodes){
       var checkedParAll = getParsAll(checkedNodes[i]);
      for(var j in checkedParAll){
          zTreeObj.expandNode(checkedParAll[j],true,false);
      }
   }
};