使用ajax完成python flask前端与后台数据的交互

一、前端页面中

html文件中：
{% extends 'base.html' %}
{% block scripts %}
    {{ super() }}
{#    <script src="http://echarts.baidu.com/dist/echarts.min.js"></script>#}
    <script src="{{ url_for('static', filename='js/jquery-1.7.1.min.js') }}"></script>
    <script src="{{ url_for('static', filename='js/echarts.min.js') }}"></script>

    <script type="text/javascript">
     $SCRIPT_ROOT = {{ request.script_root|tojson|safe }};
    </script>
    <script type="text/javascript">
         $(function() {
             //实现加法通过jquery
            $('.SUM').bind('click', function() {
              $.getJSON( '/_add_numbers', {
                a: $('input[name="a"]').val(),
                b: $('input[name="b"]').val()
              }, function(data) {
                $(".result").text(data.result);
              });
              return false;
            });
             //通过jquery获得flask路由里面的json数据
{#             $.getJSON('/_add_numbers',function(data){#}
{#                 $(".result").text(data.result);#}
{#             });#}
          });

    </script>
{% endblock %}

{% block content %}
    {{ super() }}
    <h1>jQuery Example</h1>
    <p><input type=text size=5 name=a> +
       <input type=text size=5 name=b> =
       <span class='result'>?</span>
    <p><a href=# class='SUM'>点击开始计算</a>


{% endblock %}

flask路由函数中

@check_info.route('/_add_numbers')
def add_numbers():
    a = request.args.get('a', 0, type=int)
    b = request.args.get('b', 0, type=int)
    tt=jsonify(result=a + b)
    return tt
@check_info.route('/weather',methods=['POST','GET'])
def weather():
    list = [1, 2, 3, 4, 5, 6]

    # return jsonify(month=[x for x in list])
    return render_template('jso.html')

二、直接从flask路由函数中获取json数据然后渲染在前端页面中

{% extends 'base.html' %}
{% block scripts %}
    {{ super() }}
{#    <script src="http://echarts.baidu.com/dist/echarts.min.js"></script>#}
    <script src="{{ url_for('static', filename='js/jquery-1.7.1.min.js') }}"></script>
    <script src="{{ url_for('static', filename='js/echarts.min.js') }}"></script>

    <script type="text/javascript">
     $SCRIPT_ROOT = {{ request.script_root|tojson|safe }};
    </script>
    <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并显示
        myChart.setOption ({
            title: {
                text: ''
            },
            tooltip: {},
            legend: {
                data:['销量']
            },
            xAxis: {
                data: []
            },
            yAxis: {},
            series: [{
                name: '销量',
                type: 'bar',
                data: [20,3,32,45,11,45]
            }]
        });
        //异步加载数据
        $(function(){
            $.get('/weather',function (data) {
                myChart.setOption({
                    title: {
                        text: '成绩预览'
                    },
                    xAxis: {
                        data:data.month
                    }
                });
            });
        });

    </script>
{% endblock %}

{% block content %}
    {{ super() }}
    <div class="container">
    {{ st }}
   <div id="main" style="width: 600px;height:400px;"></div>
    </div>


{% endblock %}

flask路由函数中

@check_info.route('/weather',methods=['POST','GET'])
def weather():
    list = [1, 2, 3, 4, 5, 6]
    return jsonify(month=[x for x in list])
@check_info.route('/ch')
def ch():
    return render_template('charts.html')