ECharts 环形饼图 动态获取json数据
效果图如下：
一.html部分
<div id="secondPieChart" style="width:100%; height:400px;"></div>
二.js部分
<script type="text/javascript">
function loadOneColumn() {
var myChart = echarts.init(document.getElementById(‘secondPieChart‘));
// 显示标题，图例和空的坐标轴
myChart.setOption({
color: [‘#ff7d27‘, ‘#47b73d‘, ‘#fcc36e‘, ‘#57a2fd‘, "#228b22"],//饼图颜色
title: {
text: ‘信息发布排行‘,
subtext: ‘纯属虚构‘,
x: ‘center‘
},
tooltip: {
trigger: ‘item‘,
formatter: "{a} <br/>{b} : {c} ({d}%)"
},
legend: {
orient: ‘vertical‘,
x: ‘left‘,
data: []
},
toolbox: {
show: true,
feature: {
mark: { show: true },
dataView: { show: true, readOnly: false },
magicType: {
show: true,
type: [‘pie‘, ‘funnel‘],
option: {
funnel: {
x: ‘25%‘,
width: ‘50%‘,
funnelAlign: ‘center‘,
max: 1548
}
}
},
restore: { show: true },
saveAsImage: { show: true }
}
},
calculable: true,
series: [{
name: ‘发布排行‘,
type: ‘pie‘,
radius: [‘50%‘, ‘70%‘], //设置环形的空间大小
itemStyle: {
normal: {
label: {
show: true
},
labelLine: {
show: false
}
},
emphasis: {
label: {
show: true,
position: ‘center‘,
textStyle: {
fontSize: ‘20‘,
fontWeight: ‘bold‘
}
}
}
},
data: []
}]
});
myChart.showLoading(); //数据加载完之前先显示一段简单的loading动画
var names = []; //类别数组（用于存放饼图的类别）
var brower = [];
$.ajax({
type: ‘get‘,
url: ‘json/chart/column/index_fbph.txt‘,//请求数据的地址
dataType: "json", //返回数据形式为json
success: function (result) {
//请求成功时执行该函数内容，result即为服务器返回的json对象
$.each(result.list, function (index, item) {
names.push(item.department); //挨个取出类别并填入类别数组
brower.push({
value: item.num,
name: item.department
});
});
myChart.hideLoading(); //隐藏加载动画
myChart.setOption({ //加载数据图表
legend: {
data: names
},
series: [{
data: brower
}]
});
},
error: function (errorMsg) {
//请求失败时执行该函数
alert("图表请求数据失败!");
myChart.hideLoading();
}
});
};
loadOneColumn();
</script>
三.json格式如下：
{"list":[{"department":"和平区","num":480},{"department":"河西区","num":380},{"department":"河东区","num":366},{"department":"河北区","num":320},{"department":"南开区","num":300}]}