对于基本面板，将类.panel添加到<div>元素。这样，将.panel-default类添加到此元素。
您可以尝试运行以下代码以实现面板默认类
<!DOCTYPE html> <html> <head> <title>Bootstrap Example</title> <link href = "/bootstrap/css/bootstrap.min.css" rel = "stylesheet"> <script src = "/scripts/jquery.min.js"></script> <script src = "/bootstrap/js/bootstrap.min.js"></script> </head> <body> <div class = "panel panel-default"> <div class = "panel-body"> This is demo text in a panel. </div> </div> </body> </html>