代码如下：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>ECharts</title>
<!-- <script src="http://echarts.baidu.com/dist/echarts.min.js"></script> -->
<script src="https://cdn.bootcss.com/echarts/4.0.2/echarts.js"></script>
<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
</head>
<body>
<!-- 为ECharts准备一个具备大小（宽高）的Dom -->
您选择了X轴的标签[<span id="xAxisTag"></span>],他的值为[<span id="barValue"></span>]
<input type="submit" name="" value="刷新" onclick="refreshBar()">
</br>
<div id="bar" style="width: 600px;height:400px;float:left;"></div>
<div id="pie" style="width: 600px;height:400px;float:left;"></div>
</body>
<script type="text/javascript">
function randGenerator(n, sum) {
//js生成n个和为固定sum的随机整数
//https://blog.csdn.net/smartcore/article/details/72934272
var aryRet = [];
var fSumTmp = sum;
var iAcc = 0;
for (var i = 0; i < (n -1); i++) {
var iTmp = Math.ceil(Math.random() * (fSumTmp / 2));
aryRet.push(iTmp);
fSumTmp -= iTmp;
iAcc += iTmp;
}
aryRet.push(sum-iAcc);
return aryRet;
}
function getSeriesData(){
//根据js方法本身的加载顺序，此方法需要定义在myChart前面
//此处可以通过后台生成数据，这样后台就无需返回整个option，只需要返回动态的数据部分即可
// $.ajax({
// type: ‘GET‘,
// url: "getSeriesData",
// cache: false,
// async : false,
// dataType: ‘json‘,
// success: function (result) {
// seriesdata = result;
// },
// error: function (result, XMLHttpRequest, textStatus, errorThrown) {
// // 状态码
// // console.log(XMLHttpRequest.status);
// // console.log(XMLHttpRequest.toLocaleString());
// // 状态
// // console.log(XMLHttpRequest.readyState);
// // 错误信息
// // console.log(textStatus);
// }
// });
//var n1 = Math.floor(Math.random()*500+1);
//var n2 = Math.floor(Math.random()*500+1);
//var n3 = Math.floor(Math.random()*500+1);
//var n4 = Math.floor(Math.random()*500+1);
//var n5 = Math.floor(Math.random()*500+1);
//var n6 = Math.floor(Math.random()*500+1);
//seriesdata = [n1, n2, n3, n4, n5, n6];
seriesdata = randGenerator(6, Math.floor(Math.random()*500+1));
return seriesdata;
}
function getxAxisData(){
//同样适用以ajax的方式从后台获取数据
xAxisData = ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"];
return xAxisData;
}
function getSaleOption(){
saleSeriesData = getSeriesData();
saleOption = {
title: {
text: ‘ECharts 入门示例‘
},
tooltip: {},
legend: {
data:[‘销量‘,"趋势"]
},
xAxis: {
// data: ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"],
data : getxAxisData(),
triggerEvent:true,
axisTick: {
alignWithLabel: true //坐标值是否在刻度中间
}
},
yAxis: {triggerEvent:true},
series: [{
name: ‘销量‘,
type: ‘bar‘,
//data: [n1, n2, n3, n4, n5, n6],
//data : seriesdata,
//data : getSeriesData(),
data : saleSeriesData,
itemStyle: {
normal: {
color: function(params) {
var colorList = [‘#2eddc1‘,‘#FCCE10‘,‘#E87C25‘,‘#277bbb‘,‘#E87fff‘,‘#277aaa‘];
//若返回的list长度不足，不足部分自动显示为最后一个颜色
return colorList[params.dataIndex]
},
label: {
show: true,
position: ‘top‘
}
}
}
},{
name: ‘趋势‘,
type: ‘line‘,
//data: getSeriesData(),
data : saleSeriesData,
smooth:false, //是否为曲线,默认为false
itemStyle:{
normal:{
lineStyle:{
width:1, // 虚线的宽度
type:‘dotted‘ //‘dotted‘虚线 ‘solid‘实线
}
}
}
}]
};
return saleOption;
}
function getSalePieOption(){
salePieOption = {
"legend":{
"orient":"vertical",
"left":"left"
},
"series":[
{
"data":[],
"center":[
"50%",
"60%"
],
//"name":"访问来源",
"itemStyle":{
"normal":{
"label":{
"formatter":"{b}\n{c}\n{d}%",
"show":true
}
},
"emphasis":{
"shadowOffsetX":0,
"shadowBlur":10,
"shadowColor":"rgba(0, 0, 0, 0.5)"
}
},
"radius":"55%",
"type":"pie"
}
],
"tooltip":{
"formatter":"{a} <br/>{b} : {c} ({d}%)",
"trigger":"item"
},
"title":{
//"subtext":"纯属虚构",
"x":"center",
"text":""
}
};
return salePieOption;
}
function refreshPieData(name, value){
data = randGenerator(7,value);
salePieOption.title.text = name;
salePieOption.title.subtext = "销售额:"+value;
salePieData =[
{
"name":"周一",
"value":data[0]
},
{
"name":"周二",
"value":data[1]
},
{
"name":"周三",
"value":data[2]
},
{
"name":"周四",
"value":data[3]
},
{
"name":"周五",
"value":data[4]
},
{
"name":"周六",
"value":data[5]
},
{
"name":"周日",
"value":data[6]
}
]
salePieOption.series[0].name = "销售比";
salePieOption.series[0].data = salePieData;
}
</script>
<script type="text/javascript">
// 基于准备好的dom，初始化echarts实例
var myBarChart = echarts.init(document.getElementById(‘bar‘));
// 指定图表的配置项和数据
var option = getSaleOption();
// 使用刚指定的配置项和数据显示图表。
myBarChart.setOption(option);
var myPieChart = echarts.init(document.getElementById(‘pie‘));
var salePieOption = getSalePieOption();
refreshPieData(option.xAxis.data[0], option.series[0].data[0]);
myPieChart.setOption(salePieOption);
myBarChart.on(‘click‘, function (params) {
//param具体包含的参数见 https://blog.csdn.net/allenjay11/article/details/76033232
updatePage(option.xAxis.data[params.dataIndex],params.value);
refreshPieData(option.xAxis.data[params.dataIndex],params.value);
myPieChart.setOption(salePieOption);
});
</script>
<script type="text/javascript">
function updatePage(tag, value){
var xAxisTag = $("#xAxisTag");
xAxisTag.html(tag);
var barValue = $("#barValue");
barValue.html(value);
};
function refreshBar(){
//局部刷新series内容
//此处没有用常用的刷新div等方法，而是直接改变了option的值，然后重新赋值给myChart
//简化方法，调用getSeriesData更新数据。
//option.series.data = getSeriesData();
saleSeriesData = getSeriesData();
option.series[0].data = saleSeriesData;
option.series[1].data = saleSeriesData;
myBarChart.setOption(option);
//清空饼状图
//salePieOption.title.text = "";
//salePieOption.series[0].data = "";
//salePieOption.series[0].name = "";
//myPieChart.setOption(salePieOption);
//刷新之后默认显示为柱状图的第一个对应的数据
refreshPieData(option.xAxis.data[0], option.series[0].data[0]);
myPieChart.setOption(salePieOption);
};
</script>
</html>
显示效果：
原文地址：https://www.cnblogs.com/huanghongbo/p/9060220.html
时间： 2024-10-29 19:06:44