<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>模态弹出窗的使用</title> <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css"> </head> <body> <!--下面是代码任务部分--> <!-- href触发模态弹出窗元素 --> <a data-toggle="modal" href="#mymodal-link" class="btn btn-primary">通过链接href属性触发</a> <!-- 模态弹出窗内容 --> <div class="modal" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel" aria-hidden="true" id="mymodal-link"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button> <h4 class="modal-title">模态弹出窗标题</h4> </div> <div class="modal-body"> <p>模态弹出窗主体内容</p> </div> <div class="modal-footer"> <button type="button" class="btn btn-default" data-dismiss="modal">关闭</button> <button type="button" class="btn btn-primary">保存</button> </div> </div> </div> </div> <!-- data-target触发模态弹出窗元素 --> <button class="btn btn-primary" type="button" data-toggle="modal" data-target="#mymodal-data">通过data-target触发</button> <!-- 模态弹出窗内容 --> <div class="modal" id="mymodal-data" tabindex="-1" role="dialog" aria-labelledby="mySmallModalLabel" aria-hidden="true"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button> <h4 class="modal-title">模态弹出窗标题</h4> </div> <div class="modal-body"> <p>模态弹出窗主体内容</p> </div> <div class="modal-footer"> <button type="button" class="btn btn-default" data-dismiss="modal">关闭</button> <button type="button" class="btn btn-primary">保存</button> </div> </div> </div> </div> <script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script> <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script> </body> </html>
把<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script> 中引入的网址maxcdn.bootstrapcdn.com换成libs.baidu.com就行了，其他的不用改。即用<script src="http://libs.baidu.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
以上回答都不对，经过我多次测试，终于找到了解决办法。主要原因是，引入的css和js库都不匹配。解决方法如下：
1，<link>标签用这一条：
<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css">
2，<script>标签用下面两条：
<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.js"></script>
<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
引用路径少了http:
按F12 看看控制台有没有报错。