我发现自己创建了一个选项菜单，其中我想放置一个下拉列表。我正在使用最新版本的 bootstrap，但是列表不显示选项。我想在 JSP 中使用它
下面是代码
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" crossorigin="anonymous">
</head>
<body class="bg-primary bg-opacity-75">
<header>
<div class="row align-items-center">
<div class="col">
<img class="img-fluid m-3" src="images/logo.jpg" style="max-height: 400px; max-height:100px"/><br>
</div>
</div>
<div class="row">
<div class="col">
<form action="SvMenu" method="GET">
<nav class="navbar navbar-expand-lg bg-body-tertiary" data-bs-theme="dark">
<div class="container-fluid justify-content-end">
<a class="navbar-brand" href="#">MENU DE OPCIONES</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav me-auto mb-2 mb-lg-0">
<li class="nav-item">
<a class="nav-link" aria-current="page" href="#">Inicio</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Modulo de facturas</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Modulo de clientes</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
Dropdown
</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">Action</a></li>
<li><a class="dropdown-item" href="#">Another action</a></li>
<li><a class="dropdown-item" href="#">Something else here</a></li>
</ul>
</li>
</ul>
</div>
</div>
</nav>
</form>
</div>
</div>
</header>
</body>
需要注意的是，我是按照引导页面的官方文档进行指导的。
谢谢
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz" crossorigin="anonymous"></script>
在head标签中添加js CDN。参考下面的代码。 块引用
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>JSP Page</title>
<link
href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"
rel="stylesheet"
integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN"
crossorigin="anonymous"
/>
<script
src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"
integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz"
crossorigin="anonymous"
></script>
</head>