我使用tomcat 9、java、bootstrap开发一个在线论坛。突然导航不起作用，我尝试了一些东西但没有运气。在 chrome 网络检查器选项卡中，一切似乎都很好。
<!DOCTYPE html>
<html>
<head>
<link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet">
<link href="static/css/myCss.css" rel="stylesheet">
<meta charset="UTF-8">
<link href="static/css/bootstrap.min.css" rel="stylesheet" media="screen">
<link href="static/css/customIndex.css" rel="stylesheet">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="static/css/bootstrap-responsive.css" rel="stylesheet">
<title>Index</title>
</head>
<body>
<nav class="navbar navbar-default">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target=".navbar-collapse" aria-expanded="false">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
</div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li class="active"><a href="./index.jsp">Index</a></li>
<li><a …我想知道是否可以ListView在 a 中具有固定高度的垂直方向SingleChildScrollView，并且当垂直方向没有更多内容时，ListView滚动将应用于整个屏幕（SingleChildScrollView）
像这样的东西：
SingleChildScrollView(
child: Column(
children: [
// some widgets ....
Container(
constraints: BoxConstraints(maxHeight: 200),
child: ListView.builder(
// other settings
scrollDirection: Axis.vertical,
),
)
]
)
)