Echarts：环状图

效果图：
这里写图片描述
灰色为占比部分，蓝色未占比
源码如下：
需引入jquery.min.js和echarts.min.js
<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Echarts-环状百分比图</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="js/plugins/jquery.min.js"></script>
    <script src="js/echarts.min.js"></script>
</head>

<body>
    <div style="width: 500px;height:280px;" id="pie1">

    </div>
</body>
<script>
    PercentPie.prototype.init = function () {
        var _that = this;
        var option = {
            backgroundColor: _that.backgroundColor,
            color: _that.color,
            series: [{
                name: '来源',
                type: 'pie',
                radius: ['60%', '75%'],
                avoidLabelOverlap: false,
                hoverAnimation: false,
                label: {
                    normal: {
                        show: false,
                        position: 'center',
                        textStyle: {
                            fontSize: _that.fontSize,
                            fontWeight: 'bold'
                        },
                        formatter: '{b}\n{c}%'
                    }
                },
                data: [{
                        value: _that.value,
                        name: _that.name,
                        label: {
                            normal: {
                                show: true
                            }
                        }
                    },
                    {
                        value: 100 - _that.value,
                        name: ''
                    }
                ]
            }]
        };
        echarts.init(_that.domEle).setOption(option);
    };

    /* 全省蓄水占比 */
    var option1 = {
            value: 20, //百分比,必填
            name: '', //必填
            title: '',
            backgroundColor: null,
            color: ['#EAEAEA', '#6CAEE8'],
            fontSize: 16,
            domEle: document.getElementById("pie1") //必填
        },
        percentPie1 = new PercentPie(option1);
    percentPie1.init();

    function PercentPie(option) {
        this.backgroundColor = option.backgroundColor || '#fff';
        this.color = option.color || ['#EAEAEA', '#6CAEE8'];
        this.fontSize = option.fontSize || 12;
        this.domEle = option.domEle;
        this.value = option.value;
        this.name = option.name;
    }
</script>

</html>
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