try {

        var arrs = $('#subjectClassID').val().split(",");

        var treeObj = $.fn.zTree.getZTreeObj("subjecttree");

        //checkNode(treeNode, checked, checkTypeFlag, callbackFlag)

        //treeNode(json):节点数据;checked(Boolean):勾选节点或取消勾选；checkTypeFlag(Boolean):父子节点勾选联动;callbackFlag(Boolean):事件回调函数

        for (var e in arrs) {

            treeObj.checkNode(treeObj.getNodeByParam("id", arrs[e], null), true, true,false);

        }

        zTreeOnCheck();//勾选ID集合后执行事件

    } catch (e) {

        alert(a.message);

    }