下载地址：https://v3.bootcss.com/，下载Bootstrap3版本
下载之后把文件中不需要的文件都删掉
需要获取的样式代码，可以直接从这些地方找到，然后复制
一、HTML页面导入文件，因为Bootstrap要依赖于jquery，所以也要把jquery导进来
二、布局容器
Bootstrap需要为页面内容和栅格系统包裹一个.container容器。有两种：
一、 container 左边和右边留有空白的容器布局
二、 container-fluid 类似于100%宽度，占据全部视口的容器
三、栅格系统
系统会自动将一行分为12列
行(row),列(column)
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script> <link rel="stylesheet" href="bootstrap-3.3.7-dist/css/bootstrap.min.css"> <script src="bootstrap-3.3.7-dist/js/bootstrap.min.js"></script> </head> <body> <!--导航条样式--> <nav class="navbar navbar-inverse"> <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="#bs-example-navbar-collapse-1" 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> <a class="navbar-brand" href="#">Brand</a> </div> <!-- Collect the nav links, forms, and other content for toggling --> <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"> <ul class="nav navbar-nav"> <li class="active"><a href="#">Link <span class="sr-only">(current)</span></a></li> <li><a href="#">Link</a></li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a> <ul class="dropdown-menu"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li role="separator" class="divider"></li> <li><a href="#">Separated link</a></li> <li role="separator" class="divider"></li> <li><a href="#">One more separated link</a></li> </ul> </li> </ul> <form class="navbar-form navbar-left"> <div class="form-group"> <input type="text" class="form-control" placeholder="Search"> </div> <button type="submit" class="btn btn-default">Submit</button> </form> <ul class="nav navbar-nav navbar-right"> <li><a href="#">Link</a></li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a> <ul class="dropdown-menu"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li role="separator" class="divider"></li> <li><a href="#">Separated link</a></li> </ul> </li> </ul> </div><!-- /.navbar-collapse --> </div><!-- /.container-fluid --> </nav> <div class="container"> <div class="row"> <!--左侧框--> <div class="col-md-3"> <div class="list-group"> <a href="#" class="list-group-item active"> Cras justo odio </a> <a href="#" class="list-group-item">Dapibus ac facilisis in</a> <a href="#" class="list-group-item">Morbi leo risus</a> <a href="#" class="list-group-item">Porta ac consectetur ac</a> <a href="#" class="list-group-item">Vestibulum at eros</a> </div> </div> <!--右侧框--> <div class="col-md-9"> <div class="panel panel-primary"> <div class="panel-heading"> <h3 class="panel-title">图书管理系统 <span class="glyphicon glyphicon-book pull-right"></span> </h3> </div> <div class="panel-body"> <!--搜索框--> <div class="col-md-4"> <div class="input-group"> <input type="text" class="form-control" placeholder="搜索"> <span class="input-group-btn"> <button class="btn btn-primary" type="button">搜索</button> </span> </div><!-- /input-group --> </div> <!--按钮--> <button type="button" class="btn btn-success pull-right">新建</button> <br> <br> <br> <!--表格--> <table class=" table table-bordered table-hover table-striped"> <thead> <tr> <th>编号</th> <th>书名</th> <th>价格</th> <th>作者</th> <th class="text-center">操作</th> </tr> </thead> <tbody> <tr> <td>1</td> <td>三国演义</td> <td>199.99</td> <td>罗贯中</td> <td class="text-center"> <a href="" class="btn btn-primary btn-sm">编辑</a> <a href="" class="btn btn-danger btn-sm">删除</a> </td> </tr> <tr> <td>1</td> <td>三国演义</td> <td>199.99</td> <td>罗贯中</td> <td class="text-center"> <a href="" class="btn btn-primary btn-sm">编辑</a> <a href="" class="btn btn-danger btn-sm">删除</a> </td> </tr> </tbody> </table> <!--分页--> <div class="text-center"> <nav aria-label="Page navigation"> <ul class="pagination"> <li> <a href="#" aria-label="Previous"> <span aria-hidden="true">«</span> </a> </li> <li><a href="#">1</a></li> <li><a href="#">2</a></li> <li><a href="#">3</a></li> <li><a href="#">4</a></li> <li><a href="#">5</a></li> <li> <a href="#" aria-label="Next"> <span aria-hidden="true">»</span> </a> </li> </ul> </nav> </div> </div> </div> </div> </div> </div> </body> </html>
四、表格
table-bordered为表格和每个单元格增加边框
table-hover 为每一行对鼠标悬停状态做出相应
table-striped 给tbody内的每一行增加斑马条纹样式
