Echarts+ajax实现一个简单折线图

简介: Echarts+ajax实现一个简单折线图
<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
        <script src="https://cdn.bootcss.com/echarts/4.2.1-rc1/echarts.min.js" type="text/javascript"></script>
    </head>
    <body>
        <!-- 为ECharts准备一个具备大小(宽高)的Dom -->
        <div id="main" class="col-md-12  col-sm-12 col-xs-12" style="height: 400px;"></div>
        <script>
            // 折线图
            $.ajax({
                url: "test.json",
                data: {},
                type: 'GET',
                success: function(data) {
                    console.log(JSON.stringify(data))
                    hrFun(data.echatX, data.echatY);
                },
            });
            // 心率
            var hrChart = echarts.init(document.getElementById("main"));
            function hrFun(x_data, y_data) {
                hrChart.setOption({
                    color: ['#3398DB'],
                    tooltip: {
                        trigger: 'axis',
                        axisPointer: { // 坐标轴指示器,坐标轴触发有效
                            type: 'shadow' // 默认为直线,可选为:'line' | 'shadow'
                        }
                    },
                    legend: {
                        data: ['心率值']
                    },
                    grid: {
                        left: '3%',
                        right: '20%',
                        bottom: '20%',
                        containLabel: true
                    },
                    xAxis: [{
                        type: 'category',
                        data: x_data,
                    }],
                    yAxis: [{ // 纵轴标尺固定
                        type: 'value',
                        scale: true,
                        name: '心率值',
                        min : 0, // 就是这两个 最小值
                        max : 'dataMax', // 最大值
                        splitNumber: 20,
                        boundaryGap: [0.2, 0.2]
                    }],
                    series: [{
                        name: '心率',
                        type: 'line',
                        data: y_data
                    }]
                }, true);
            }
        </script>
    </body>
</html>

json数据

{
    "echatX": ["2020-11-18 00:08:36", "2020-11-18 00:18:42", "2020-11-18 00:28:46", "2020-11-18 00:38:33",
        "2020-11-18 00:48:43", "2020-11-18 00:58:36", "2020-11-18 01:08:40", "2020-11-18 01:18:36", "2020-11-18 01:28:42",
        "2020-11-18 01:38:39", "2020-11-18 01:48:45", "2020-11-18 01:58:35", "2020-11-18 02:08:34", "2020-11-18 02:18:32",
        "2020-11-18 02:28:38", "2020-11-18 02:38:37", "2020-11-18 02:48:44", "2020-11-18 02:58:49", "2020-11-18 03:08:38",
        "2020-11-18 03:18:42", "2020-11-18 03:28:35", "2020-11-18 03:38:44", "2020-11-18 03:48:35", "2020-11-18 03:58:50",
        "2020-11-18 04:08:40", "2020-11-18 04:18:46", "2020-11-18 04:28:48", "2020-11-18 04:38:46", "2020-11-18 04:48:35",
        "2020-11-18 04:58:46", "2020-11-18 05:08:38", "2020-11-18 05:18:34", "2020-11-18 05:28:46", "2020-11-18 05:38:35",
        "2020-11-18 05:48:41", "2020-11-18 05:58:38", "2020-11-18 06:08:41", "2020-11-18 06:18:49", "2020-11-18 06:28:46",
        "2020-11-18 06:38:43", "2020-11-18 06:48:40", "2020-11-18 06:58:47", "2020-11-18 07:08:36", "2020-11-18 07:18:35",
        "2020-11-18 07:28:51", "2020-11-18 07:38:45", "2020-11-18 07:48:39", "2020-11-18 07:58:42", "2020-11-18 08:08:51",
        "2020-11-18 08:18:37", "2020-11-18 08:28:43", "2020-11-18 08:38:46", "2020-11-18 08:48:54", "2020-11-18 08:58:52",
        "2020-11-18 09:08:51", "2020-11-18 09:18:36", "2020-11-18 09:28:41", "2020-11-18 09:38:42", "2020-11-18 09:48:48",
        "2020-11-18 09:58:52", "2020-11-18 10:08:48", "2020-11-18 10:18:38", "2020-11-18 10:28:49", "2020-11-18 10:38:44",
        "2020-11-18 10:48:37", "2020-11-18 11:08:49", "2020-11-18 11:18:49"
    ],
    "echatY": [80, 112, 90, 91, 104, 99, 107, 106, 121, 105, 106, 109, 102, 79, 81, 64, 70, 89, 108, 86, 62, 60, 74, 71,
        112, 89, 81, 117, 90, 62, 90, 100, 99, 104, 103, 93, 113, 114, 74, 86, 115, 80, 119, 113, 96, 104, 111, 98, 93, 101,
        93, 101, 60, 78, 79, 93, 69, 98, 124, 104, 108, 100, 104, 74, 100, 102, 75
    ],
    "echatY2": []
}

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