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前端页面
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <title>echarts示例</title>
- <script src="jquery.min.js"></script>
- <script type = "text/javascript" src = "echarts.min.js" ></script>
- </head>
-
- <body>
- <div id="main" style="width: 600px;height:400px;"></div>
- <script type="text/javascript">
- var myChart = echarts.init(document.getElementById('main'));
-
- // 初始化图表选项
- myChart.setOption({
- title: {
- text: 'ECharts 数据异步加载示例'
- },
- tooltip: {},
- legend: {
- data: ['销量']
- },
- xAxis: {
- data: []
- },
- yAxis: {},
- series: [{
- name: '销量',
- type: 'bar',
- data: []
- }]
- });
-
- function fetchData() {
- $.ajax({
- url: 'api/echarts/demo/', // 改为你的数据接口地址
- dataType: 'json',
- success: function(data) {
- // 假设返回的数据格式如下:
- // {
- // categories: ["衬衫", "羊毛衫", ...],
- // values: [5, 20, ...]
- // }
- myChart.setOption({
- xAxis: {
- data: data.categories
- },
- series: [{
- name: '销量',
- data: data.values
- }]
- });
- },
- error: function(xhr, type, errorThrown) {
- // 处理错误
- }
- });
- }
-
- // 设置定时器,定期更新数据
- setInterval(function () {
- fetchData(); // 调用获取数据的函数
- }, 5000); // 5000毫秒即5秒钟更新一次数据
- </script>
- </body>
- </html>
跨域问题,依然采用nginx代理。
后端代码
- from django.http import HttpResponse
- import json
-
- def EchartsDemo(request):
- data = {}
- categories = ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"]
- values = [50, 20, 36, 10, 10, 20]
- data['categories'] = categories
- data['values'] = values
- print("echerts=",data)
- return HttpResponse(json.dumps(data), content_type="application/json")
展示效果:
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