初始化树时,分别设置setting的对应属性
setting.edit.drag.isCopy = true;
setting.edit.drag.isMove = false;
$.fn.zTree.init($("#tptree"), setting2, result);
setting.edit.drag.isCopy = false;
setting.edit.drag.isMove = true;
$.fn.zTree.init($("#tptree2"), setting, result);