Echarts学习：Django快速集成Echarts

django快速使用echarts准备

1.在线定制下载echarts
https://echarts.apache.org/zh/builder.html

2.创建一个django项目或者在已有的项目

配置文件中确保数据库配置、static配置、与添加项目名到INSTALLED_APPS下。
配置静态文件目录static，目录下创建：css、img、js。
保存echarts.min.js到js目录下。
创建templates文件，html文件放到此目录。

快速静态测试

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>ECharts</title>
    <!-- 引入 echarts.js -->
    {% load static %}
    <script src="{% static '/js/echarts.min.js' %}"></script>
</head>
<body>
    <!-- 为ECharts准备一个具备大小（宽高）的Dom -->
    <div id="main" style=" 600px;height:400px;"></div>
    <script type="text/javascript">
        // 基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

        // 指定图表的配置项和数据
        var option = {
            title: {
                text: 'ECharts 入门示例'
            },
            tooltip: {},
            legend: {
                data:['销量']
            },
            xAxis: {
                data: ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"]
            },
            yAxis: {},
            series: [{
                name: '销量',
                type: 'bar',
                data: [5, 20, 36, 10, 10, 20]
            }]
        };

        // 使用刚指定的配置项和数据显示图表。
        myChart.setOption(option);
    </script>
</body>
</html>

test.html文件

from django.urls import path
from app.views import TestView

urlpatterns = [
    path('test/',TestView.as_view()),
]

urls文件

from django.shortcuts import render
from rest_framework.views import View
from rest_framework.response import Response


class TestView(View):
    def dispatch(self, request, *args, **kwargs):
        """
        请求到来之后，都要执行dispatch方法，dispatch方法根据请求方式不同触发 get/post/put等方法

        注意：APIView中的dispatch方法有好多好多的功能
        """
        return super().dispatch(request, *args, **kwargs)

    def get(self, request, *args, **kwargs):
        return render(request, "test.html")

    def post(self, request, *args, **kwargs):
        return Response('POST请求，响应内容')

    def put(self, request, *args, **kwargs):
        return Response('PUT请求，响应内容')

Views文件

访问url地址：

django获取数据库中的数据传递给echarts

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>ECharts</title>
    <!-- 引入 echarts.js -->
    {% load static %}
    <script src="{% static '/js/echarts.min.js' %}"></script>
</head>
<body>
    <div id="main" style=" 600px;height:400px;"></div>
    <script type="text/javascript">
    // 基于准备好的dom，初始化echarts实例
    console.log(name)
    var myChart = echarts.init(document.getElementById('main'));

    // 指定图表的配置项和数据
    var option = {
        title: {
            text: 'ECharts 入门示例'
        },
        tooltip: {},
        legend: {
            data: ['销量']
        },
        xAxis: {
            data: {{ name|safe }}
        },
        yAxis: {},
        series: [{
            name: '销量',
            type: 'bar',
            data:{{ data|safe }}
        }]
    };

    // 使用刚指定的配置项和数据显示图表。
    myChart.setOption(option);
    </script>
</body>
</html>

test1.html

from django.urls import path
from app.views import TestView1

urlpatterns = [
    path('test1/',TestView1.as_view()),
]

urls文件

from django.shortcuts import render
from rest_framework.views import View
from rest_framework.response import Response

class TestView1(View):
    def dispatch(self, request, *args, **kwargs):
        """
        请求到来之后，都要执行dispatch方法，dispatch方法根据请求方式不同触发 get/post/put等方法

        注意：APIView中的dispatch方法有好多好多的功能
        """
        return super().dispatch(request, *args, **kwargs)

    def get(self, request, *args, **kwargs):
        name = ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"]
        data = [56, 40, 54, 23, 12, 31]
        return render(request, "test1.html",{"name":name,"data":data})

    def post(self, request, *args, **kwargs):
        return Response('POST请求，响应内容')

    def put(self, request, *args, **kwargs):
        return Response('PUT请求，响应内容')

Views文件

注意：我在views文件中直接返回数据，在html模板中使用标签渲染，如果你需要使用ORM从数据库拿数据，可以做如下操作：

wheelsList = Wheel.objects.all()
name = list(Wheel.objects.values_list('name', flat=True))
data = list(Wheel.objects.values_list('trackid', flat=True))

访问url地址：

echarts异步更新数据

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <!-- 引入 jquery.js-->
    <script src="http://code.jquery.com/jquery-latest.js"></script>
    <!-- 引入 echarts.js -->
    {% load static %}
    <script src="{% static '/js/echarts.min.js' %}"></script>
</head>
<body>
    <div id="main" style=" 600px;height:400px;"></div>
    <script type="text/javascript">
    $(function () {
        var server_info;
        var myChart = echarts.init(document.getElementById('main'));
        var option = {
            title: {
                text: 'ECharts 入门示例'
            },
            tooltip: {},
            legend: {
                data:['销量']
            },
            xAxis: {
                data: {{ name  | safe }}
            },
            yAxis: {},
            series: [{
                name: '销量',
                type: 'bar',
                data: {{ data | safe }}
            }]
        };
        myChart.setOption(option, true);

        setInterval( function () {

                $.ajax({
                    type: 'GET',
                    url: '/test1_api/',
                    dataType: 'json',
                    success: function (arg) {
                        server_info = eval(arg);
                        option.xAxis.data =  server_info.name;
                        option.series[0].data = server_info.data;
                    }
                });
                    myChart.setOption(option, true);
                }, 2000);
         window.onresize = function () {
            myChart.resize();
        };
    });
    </script>
</body>
</html>

test2.html文件

from django.urls import path
from app.views import TestView,TestView1,TestView1api

urlpatterns = [
    path('test2/',TestView1.as_view()),
    path('test1_api/',TestView1api.as_view()),
]

urls文件

from django.shortcuts import render
from rest_framework.views import View
from rest_framework.response import Response
from django.http import HttpResponse


class TestView1(View):
    def dispatch(self, request, *args, **kwargs):
        """
        请求到来之后，都要执行dispatch方法，dispatch方法根据请求方式不同触发 get/post/put等方法

        注意：APIView中的dispatch方法有好多好多的功能
        """
        return super().dispatch(request, *args, **kwargs)

    def get(self, request, *args, **kwargs):
        name = ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"]
        data = [56, 40, 54, 23, 12, 31]
        return render(request, "test2.html",{"name":name,"data":data})

    def post(self, request, *args, **kwargs):
        return Response('POST请求，响应内容')

    def put(self, request, *args, **kwargs):
        return Response('PUT请求，响应内容')


count = 1
class TestView1api(View):
    def dispatch(self, request, *args, **kwargs):
        """
        请求到来之后，都要执行dispatch方法，dispatch方法根据请求方式不同触发 get/post/put等方法

        注意：APIView中的dispatch方法有好多好多的功能
        """
        return super().dispatch(request, *args, **kwargs)

    def get(self, request, *args, **kwargs):
        global count
        name = ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"]
        data = [56+count, 40+count, 54+count, 23+count, 12+count, 31+count]
        count = count + 1
        print(data)
        print(count)
        ret = {'name': name, 'data': data}
        return HttpResponse(json.dumps(ret))


    def post(self, request, *args, **kwargs):
        return Response('POST请求，响应内容')

    def put(self, request, *args, **kwargs):
        return Response('PUT请求，响应内容')

View文件

echarts异步加载+异步更新

在上个示例的基础上，修改test2.html如下：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <!-- 引入 jquery.js-->
    <script src="http://code.jquery.com/jquery-latest.js"></script>
    <!-- 引入 echarts.js -->
    {% load static %}
    <script src="{% static '/js/echarts.min.js' %}"></script>
</head>
<body>
    <div id="main" style=" 600px;height:400px;"></div>
    <script type="text/javascript">
    $(function () {
        var server_info;
        // 基于准备好的dom，初始化ECharts实例
        var myChart = echarts.init(document.getElementById('main'));
        // 指定图表的配置项和数据
        var option = {
            title: {
                text: 'ECharts 入门示例'
            },
            tooltip: {},
            legend: {
                data: ['销量']
            },
            xAxis: {
                data: []
            },
            yAxis: {},
            series: [{
                name: '销量',
                type: 'bar',
                data: []
            }]
        };
        myChart.setOption(option, true);
        // 异步加载json格式数据
        $.getJSON('http://127.0.0.1:8080/test1_api/', function (data) {
            myChart.setOption({
                xAxis: {
                    data: data.name
                },
                series: [{
                    // 根据名字对应到相应的系列
                    data: data.data
                }]
            });
        });
        // ajax异步更新json格式数据
        setInterval( function () {
                $.ajax({
                    type: 'GET',
                    url: '/test1_api/',
                    dataType: 'json',
                    success: function (arg) {
                        server_info = eval(arg);
                        option.xAxis.data =  server_info.name;
                        option.series[0].data = server_info.data;
                    }
                });
                    myChart.setOption(option, true);
                }, 2000);
         window.onresize = function () {
            myChart.resize();
         };

    });
    </script>
</body>
</html>

test2.html文件