一、模板继承
目的是：减少代码的冗余
语法：
{% block classinfo %}{% endblock %}
具体步骤：
1、创建一个base.html文件，
2、把要显示的页面的内容写在这里面，也就是html要在浏览器显示的内容
3、在right里面写个盒子
{% block classinfo %}
{% endblock %}
在这里面写个空盒子，以后谁来扩展就在这个盒子里面添加相应的内容就行了
4、然后再创建一个.html文件，让这个继承base.html文件，
{% extends “base.html” %} #必须是在文件的第一行
在基板里面添加内容
{% block classinfo %}
<h2>首页</h2>
<h2>学生信息</h2>
<h3>{{ class_id }}班</h3>
{% endblock%}
5、也可以写好多盒子，
在left中写个盒子
{% block menu %}
<p>I see you you</p>
{% endblock %}
注意：
盒子里面可以有默认的内容，如果有默认的时候你不扩展就走默认的，如果你扩展了，就替换了，
那么不替换直接追加可以嘛？可以的，那就用下面的方式。
{% block.super %}
例如：
{% block menu %} {{ block.super }} <p>！！！</p> #先继承父类的，后插入数据{% endblock %}
1、模板继承围绕两点：继承和扩展
你有什么继承什么，
扩展的是盒子，
2、模板中设置的盒子越多越好，因为这样你想扩展的时候就容易了。我想扩展就扩展了。不扩展就不扩展了
3、为了更好的可读性，你也可以给你的 {% endblock %} 标签一个 名字 。例如：
{% block content %}
...
{% endblock content %}
4、如果你发现你自己在大量的模版中复制内容，那可能意味着你应该把内容移动到父模版中的一个 {% block %} 中。
最后，请注意你并不能在一个模版中定义多个相同名字的 block 标签。这个限制的存在是因为block标签的作用是“双向”的。这个意思是，block标签不仅提供了一个坑去填，它还在 _父模版_中定义了填坑的内容。如果在一个模版中有两个名字一样的 block 标签，模版的父模版将不知道使用哪个block的内容。
具体例子说明
urls.py
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^text/(\d+)', views.text),
]
views.py
from django.shortcuts import render,redirect# Create your views here.def text(request,class_id):
# 班级变量
print(class_id) #拿到的是你在路径里输入的几就是几
# 数据库查询
return render(request, "text.html", {"class_id": class_id})
templaite / base.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" href="/static/bootstrap-3.3.7-dist/css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" >
<title>Title</title>
<style>
.right {
height: 400px;
background-color: silver;
}
</style>
</head>
<body>
{#导航条#}
<nav class="navbar navbar-primary 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="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >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="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Link <span class="sr-only">(current)</span></a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Link</a></li>
<li class="dropdown">
<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" 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="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Action</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Another action</a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Something else here</a></li>
<li role="separator" class="divider"></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Separated link</a></li>
<li role="separator" class="divider"></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >One more separated link</a></li>
</ul>
</li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
{#内容#}
<div class="containers">
<div class="row">
<div class="col-md-11 col-lg-offset-1">
{# 左侧#}
<div class="left col-md-3">
{% block menu %}
<div class="list-group">
<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="list-group-item active">
学生班级
</a>
<a href="/text/6" rel="external nofollow" class="list-group-item">s6</a>
<a href="/text/7" rel="external nofollow" class="list-group-item">s7</a>
<a href="/text/8" rel="external nofollow" class="list-group-item">s8</a>
<a href="/text/9" rel="external nofollow" class="list-group-item">s9</a>
</div>
{% endblock %}
</div>
{# 右侧#}
<div class="right col-md-8">
{# 定义一个盒子#}
{% block classinfo %} {% endblock %}
</div>
</div>
</div>
</div>
{#底部#}</body>
</html>
template /text.py 继承上面的文件
{% extends "base.html" %}
{% block classinfo %}
<h1>学生信息</h1>
<h3>{{ class_id }}班级</h3>
{% endblock %}
{#追加#}
{% block menu %}
{{ block.super }}
<a href="" rel="external nofollow" >学生信息</a>
{% endblock %}
二、静态文件配置
我们自己导入的一些包就叫做静态文件
1、在全局中先创建一个static的包，
2、在static里面导入我们的bootstrap，还是jquery等
3、然后在settings.py中加上一些配置
STATIC_URL = '/static/' #这个配置就相当于下面配置的别名,如果这里的名字修改了就按照这里的名字去导入
STATICFILES_DIRS = [
os.path.join(BASE_DIR,"static") #E:\day68\static 找到static路径
]
4、导入css,js,jquery
<link rel = "stysheet",href= "/static/index.css/"> <link rel="stylesheet" href="/static/bootstrap-3.3.7-dist/css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" >
