Python Django学习

1、下载

python -m pip install Django==3.0.8 -i https://pypi.tuna.tsinghua.edu.cn/simple

2、新建一个项目

python django-admin.py startproject FirstDjango

django-admin.py目录

可切换到自己想要的目录创建,否则创建出的项目和django-admin.py同级

创建完后的目录:

urls.py中可以配置访问的url

settings.py中可以配置基础信息

3、启动服务

python manage.py runserver 0.0.0.0:8090

0.0.0.0表示其他机器通过IP可以访问你的部署(同一局域网下或者使用服务器发布,需要能ping通)

127.0.0.1表示仅本机可以访问

8090为端口号

打开网页输入http://127.0.0.1:8090/即可访问

4、添加默认登录页

(1)创建请求路径的py文件

在urls.py同级目录下创建一个views.py文件

views.py内容

from django.shortcuts import render


def login(request):
    return render(request, 'login.html')

(2)创建静态资源文件夹

在manage.py同级目录下创建一个templates文件夹,在templates文件夹下创建css和js和img文件夹以及login.html文件

css和js以及img文件夹中放入bootstrap和jquery以及背景图片

login.html内容

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>登录</title>
    <link rel="stylesheet" href="/static/css/bootstrap.min.css">
    <script src="/static/js/jquery-1.11.3.min.js"></script>
</head>

<body background="/static/img/bk.jpg">
    <div style="width: 300px;margin-top: 30%;margin-left: 70%;">
        <div style="padding: 0px 0px 0px 0px;">
            <form class="bs-example bs-example-form" role="form">
                <div class="input-group">
                    <span class="input-group-addon">用户名</span>
                    <input type="text" class="form-control" placeholder="">
                </div>
                <br>
                <div class="input-group">
                    <span class="input-group-addon">密&ensp;&ensp;码</span>
                    <input type="password" class="form-control" placeholder="">
                </div>
            </form>
        </div>
        <div style="text-align: right;">
            <div class="btn-group">
                <button type="button" class="btn btn-default">注册</button>
                <button type="button" class="btn btn-default" id="login">登录</button>
            </div>
        </div>
    </div>
</body>
<script>
    $(function () {
        $('#login').click(function () {
            $(window).attr('location', 'back_data')
        })
    })
</script>

</html>

(3)在urls.py中添加代码

(4)在settings.py中添加代码

 

(5)访问127.0.0.1:8090

5、前端接受后台数据

views.py添加代码

from django.shortcuts import render


def login(request):
    return render(request, 'login.html')


def get_data(request):
    data = {'data': '普通数据',
            'data_list': ['列表数据1', '列表数据2', '列表数据3'],
            'data_dict': {'name': '李华', 'age': 20},
            'data_list_dict': [{'name': '小白', 'age': 21}, {'name': '袁华', 'age': 20}],
            }
    return render(request, 'background.html', data)

urls.py添加代码

在login.html同级添加background.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/static/css/bootstrap.min.css">
    <script src="/static/js/jquery-1.11.3.min.js"></script>


</head>

<body>
    <p>这是正常取key,获取的后台数据为:{{data}}</p>
    <p>这是列表的后台数据(所有):{{data_list}}</p>
    <p>这是列表的后台数据(取下标2):{{data_list.2}}</p>
    <p>这是字典的后台数据(所有):{{data_dict}}</p>
    <p>这是字典的后台数据(取key为name):{{data_dict.name}}</p>
    <p>这是字典的后台数据(取key为age):{{data_dict.age}}</p>
    <p>两者结合:{{data_list_dict.0.name}}</p>
    <p>两者结合:{{data_list_dict.1.age}}</p>
    <div style="width: 300px;">
        <table class="table table-bordered">
            <caption>遍历列表</caption>
            <thead>
            </thead>
            <tbody>
                <tr>
                    {% for i in data_list %}
                    <td>{{i}}</td>
                    {% endfor %}
                </tr>
            </tbody>
        </table>
    </div>
    <div style="width: 300px;">
        <table class="table table-bordered">
            <caption>遍历字典kyes</caption>
            <thead>
            </thead>
            <tbody>
                <tr>
                    {% for i in data_dict.keys %}
                    <td>{{ i }}</td>
                    {% endfor %}
                </tr>
            </tbody>
        </table>
    </div>
    <div style="width: 300px;">
        <table class="table table-bordered">
            <caption>遍历字典values</caption>
            <thead>
            </thead>
            <tbody>
                <tr>
                    {% for i in data_dict.values %}
                    <td>{{ i }}</td>
                    {% endfor %}
                </tr>
            </tbody>
        </table>
    </div>
    <div style="width: 300px;">
        <table class="table table-bordered">
            <caption>遍历字典items</caption>
            <thead>
            </thead>
            <tbody>
                <tr>
                    {% for i,j in data_dict.items %}
                    <td>{{ i }}----{{j}}</td>
                    {% endfor %}
                </tr>
            </tbody>
        </table>
    </div>
    <div style="width: 300px;">
        <table class="table table-bordered">
            <caption>遍历字典+列表</caption>
            <thead>
                <tr>
                    {% for i in data_list_dict.0.keys %}
                    <td>{{i}}</td>
                    {% endfor %}
                </tr>
            </thead>
            <tbody>
                {% for i in data_list_dict %}
                <tr>{% for j in i.values %}
                    <td>{{ j }}</td>
                    {% endfor %}</tr>
                {% endfor %}
            </tbody>
        </table>
    </div>
</body>

</html>

假设后台返回字典形式

data = {'data': '普通数据',
            'data_list': ['列表数据1', '列表数据2', '列表数据3'],
            'data_dict': {'name': '李华', 'age': 20},
            'data_list_dict': [{'name': '小白', 'age': 21}, {'name': '袁华', 'age': 20}],
            }

(1)正常取字典key

<p>这是正常取key,获取的后台数据为:{{data}}</p>

(2)字典中有列表

<p>这是列表的后台数据(所有):{{data_list}}</p>
<p>这是列表的后台数据(取下标2):{{data_list.2}}</p>

(3)字典中有字典

<p>这是字典的后台数据(所有):{{data_dict}}</p>
<p>这是字典的后台数据(取key为name):{{data_dict.name}}</p>
<p>这是字典的后台数据(取key为age):{{data_dict.age}}</p>

(4)字典中有列表,列表中有字典

<p>两者结合:{{data_list_dict.0.name}}</p>
<p>两者结合:{{data_list_dict.1.age}}</p>

(5)遍历列表

<div style="width: 300px;">
        <table class="table table-bordered">
            <caption>遍历列表</caption>
            <thead>
            </thead>
            <tbody>
                <tr>
                    {% for i in data_list %}
                    <td>{{i}}</td>
                    {% endfor %}
                </tr>
            </tbody>
        </table>
    </div>

(6)遍历字典

<div style="width: 300px;">
        <table class="table table-bordered">
            <caption>遍历字典kyes</caption>
            <thead>
            </thead>
            <tbody>
                <tr>
                    {% for i in data_dict.keys %}
                    <td>{{ i }}</td>
                    {% endfor %}
                </tr>
            </tbody>
        </table>
    </div>
    <div style="width: 300px;">
        <table class="table table-bordered">
            <caption>遍历字典values</caption>
            <thead>
            </thead>
            <tbody>
                <tr>
                    {% for i in data_dict.values %}
                    <td>{{ i }}</td>
                    {% endfor %}
                </tr>
            </tbody>
        </table>
    </div>
    <div style="width: 300px;">
        <table class="table table-bordered">
            <caption>遍历字典items</caption>
            <thead>
            </thead>
            <tbody>
                <tr>
                    {% for i,j in data_dict.items %}
                    <td>{{ i }}----{{j}}</td>
                    {% endfor %}
                </tr>
            </tbody>
        </table>
    </div>
    <div style="width: 300px;">
        <table class="table table-bordered">
            <caption>遍历字典+列表</caption>
            <thead>
                <tr>
                    {% for i in data_list_dict.0.keys %}
                    <td>{{i}}</td>
                    {% endfor %}
                </tr>
            </thead>
            <tbody>
                {% for i in data_list_dict %}
                <tr>{% for j in i.values %}
                    <td>{{ j }}</td>
                    {% endfor %}</tr>
                {% endfor %}
            </tbody>
        </table>
    </div>

运行

6、后台接收前端数据

GET方式

(1)在login.html同级添加form_commit.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="/static/css/bootstrap.min.css">
    <script src="/static/js/jquery-1.11.3.min.js"></script>
    <title>发送数据</title>
</head>

<body>
    <div style="width: 400px;">
        <form class="form-horizontal" role="form" action="/form_commit" method="GET">
            <div class="form-group">
                <label for="name" class="col-sm-2 control-label">姓名</label>
                <div class="col-sm-10">
                    <input type="text" class="form-control" name='name' id="name" placeholder="请输入姓名">
                </div>
            </div>
            <div class="form-group">
                <label for="age" class="col-sm-2 control-label">年龄</label>
                <div class="col-sm-10">
                    <input type="text" class="form-control" name="age" id="age" placeholder="请输入年龄">
                </div>
            </div>
            <div class="form-group">
                <div class="col-sm-offset-2 col-sm-10">
                    <button type="submit" class="btn btn-default">发送</button>
                </div>
            </div>
        </form>
    </div>
    <p>后台数据接收的姓名:{{name}}</p>
    <p>后台数据接收的年龄+10岁:{{age}}</p>
</body>

</html>

(2)urls.py添加代码

 (3)views.py添加代码

from django.shortcuts import render


def login(request):
    return render(request, 'login.html')


def get_data(request):
    data = {'data': '普通数据',
            'data_list': ['列表数据1', '列表数据2', '列表数据3'],
            'data_dict': {'name': '李华', 'age': 20},
            'data_list_dict': [{'name': '小白', 'age': 21}, {'name': '袁华', 'age': 20}],
            }
    return render(request, 'background.html', data)


def form_commit_html(request):
    return render(request, 'form_commit.html')


def form_commit(request):
    request.encoding = 'utf-8'
    data = dict()
    username = '未接受到前端数据'
    age = -10
    print(request.GET)
    if 'name' in request.GET and request.GET['name']:
        username = request.GET['name']
        print('name:{}'.format(username))
    if 'age' in request.GET and request.GET['age']:
        age = request.GET['age']
        print('age:{}'.format(age))
    data['name'] = username
    data['age'] = int(age) + 10
    return render(request, 'form_commit.html', data)

(4)运行

 POST方式

(1)form_commit.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="/static/css/bootstrap.min.css">
    <script src="/static/js/jquery-1.11.3.min.js"></script>
    <title>发送数据</title>
</head>

<body>
    <div style="width: 400px;">
        <form class="form-horizontal" role="form" action="/form_commit" method="GET">
            <div class="form-group">
                <label for="name" class="col-sm-2 control-label">姓名</label>
                <div class="col-sm-10">
                    <input type="text" class="form-control" name='name' id="name" placeholder="请输入姓名">
                </div>
            </div>
            <div class="form-group">
                <label for="age" class="col-sm-2 control-label">年龄</label>
                <div class="col-sm-10">
                    <input type="text" class="form-control" name="age" id="age" placeholder="请输入年龄">
                </div>
            </div>
            <div class="form-group">
                <div class="col-sm-offset-2 col-sm-10">
                    <button type="submit" class="btn btn-default">发送</button>
                </div>
            </div>
        </form>
    </div>
    <p>后台数据接收的姓名:{{name}}</p>
    <p>后台数据接收的年龄+10岁:{{age}}</p>
    <h2>POST方式</h2>
    <div style="width: 400px;">
        <form class="form-horizontal" role="form" action="/form_commit_post/" method="POST">
            {% csrf_token %}
            <div class="form-group">
                <label for="name" class="col-sm-2 control-label">姓名</label>
                <div class="col-sm-10">
                    <input type="text" class="form-control" name='name' id="name" placeholder="请输入姓名">
                </div>
            </div>
            <div class="form-group">
                <label for="age" class="col-sm-2 control-label">年龄</label>
                <div class="col-sm-10">
                    <input type="text" class="form-control" name="age" id="age" placeholder="请输入年龄">
                </div>
            </div>
            <div class="form-group">
                <div class="col-sm-offset-2 col-sm-10">
                    <button type="submit" class="btn btn-default">发送</button>
                </div>
            </div>
        </form>
    </div>
    <p>后台数据接收的姓名:{{name_post}}</p>
    <p>后台数据接收的年龄+10岁:{{age_post}}</p>
</body>

</html>

一定要加上 {% csrf_token %}否则403错误

(2)urls.py

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', views.login),
    path('back_data/', views.get_data),
    path('form_commit.html/', views.form_commit_html),
    path('form_commit/', views.form_commit),
    path('form_commit_post/', views.form_commit_post),
]

(3)views.py

def form_commit_post(request):
    username = '未接受到前端数据-post'
    age = -10
    if 'name' in request.POST and request.POST['name']:
        username = request.POST['name']
        print('name_post:{}'.format(username))
    if 'age' in request.POST and request.POST['age']:
        age = request.POST['age']
        print('age_post:{}'.format(age))
    data = dict()
    data['name_post'] = username
    data['age_post'] = int(age) + 10
    return render(request, 'form_commit.html', data)

(4)运行

posted @ 2020-07-27 15:40  南风丶轻语  阅读(261)  评论(0编辑  收藏  举报