Ext可选树,部分节点展不开

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Ext可选树,部分节点展不开5

组成树菜单的数据由后台加载，其可选，可展开，是否为叶子属性后台可控制，现在问题时，数据全部加载出来，不知为何，但有两个菜单不能展开？如图：

//加载数据的方法
/**
	 * 1.首先根据系统管理员加载菜单列表以及末级菜单下的功能列表
	 * 2.根据当前角色来选中（勾选）当前拥有的菜单和功能
	 */
	public ActionResult getFunTreeByRid(int adminRoleId,int currentRoleId) throws Exception
	{
		List<Menu> firstMList=new ArrayList<Menu>();
		List<Menu> secondMList=new ArrayList<Menu>();
		List<Functions> thirdMList=new ArrayList<Functions>();
		
		//一级菜单列表
		firstMList = menuDAO.listRoleMenu(adminRoleId,currentRoleId,"Y", "N");
		List<RolesTreeNode> menuTree=new ArrayList<RolesTreeNode>();
		for(int i=0;i<firstMList.size();i++)
		{
			Menu m1 = (Menu) firstMList.get(i);
			RolesTreeNode node = new RolesTreeNode(m1.getMenuName(),m1.getId().toString(),
					null,true,false,m1.isChecked());
			
			//二级级菜单列表
			secondMList = menuDAO.listSubRoleMenu(adminRoleId,currentRoleId,m1.getId(),"N", "Y");
			for(int j=0;j<secondMList.size();j++)
			{
				Menu m2 = (Menu) secondMList.get(j);
				RolesTreeNode node2 = new RolesTreeNode(m2.getMenuName(),m2.getId().toString(),
						null,true,false,m2.isChecked());
				
				//末级菜单下的功能(根据菜单id查询此菜单下的功能)
				thirdMList = functionsDAO.listFuncs(adminRoleId, currentRoleId, m2.getId());

				for (int k=0;k<thirdMList.size();k++) 

				{

					Functions f = (Functions) thirdMList.get(k);

					RolesTreeNode node3 = new RolesTreeNode(f.getFuncName(),f.getId().toString(),

							null,false,true,f.isChecked());

					

					node2.getChildren().add(node3);

				}

				node.getChildren().add(node2);

			}

			menuTree.add(node);

		}

		result.setMessage(ExtHelper.getJsonFromArray(menuTree));

		return result;

	}

//控制树节点的java类部分代码
private String text;
	private String iconCls;
	private String id;
	private boolean expanded;
	private boolean leaf;
	private boolean checked;
	private List<RolesTreeNode> children = new ArrayList<RolesTreeNode>();
	public RolesTreeNode() {}
	
	//树菜单文字，树菜单id，树菜单图标，是否展开，是否叶子，是否勾选
	public RolesTreeNode(String text,String id,String iconCls,boolean expanded,boolean leaf,boolean checked) {
		this.text = text;
		this.id = id;
		this.iconCls = iconCls;
		this.expanded = expanded;
		this.leaf = leaf;
		this.checked=checked;
	}

//ext树菜单代码
//功能列表设置--win
	var rolesTreeloader = new Ext.tree.TreeLoader({});//加载数节点
	var roles_tree = new XTreePanel({
    	iconCls: 'content',
    	title : '角色功能设置',	
    	id: 'tree-panel1',  	
		layout: 'fit',
        region:'west',  	
        rootVisible: false,
        lines: false,
        singleExpand: true,
        useArrows: true,
        loader : rolesTreeloader,
        root: new Ext.tree.AsyncTreeNode(),
        autoScroll: true,          
        split:true,
		margins: '2 0 2 5',
        width: 450,
        minSize: 530,
		collapsible: true,//,
		listeners: {
            'checkchange': function(node, checked){selParent(node, checked);selChild(node, checked);}
        }
    });