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echarts将展示全天的数据,如一天的电费,一个停车场一天的饱和度等问题
项目场景：
我们的项目是通过ai识别停车场的停车数,来展示此停车场全天的饱和度,如下
问题描述
后台接口给的数据,就是这种,返回所有有停车数量的时间段,但是我们的x轴要求展示全天的数据,并且可伸缩刻度展示具体时间的停车情况
[ {time:'2023-10-27 08:20:20',carSaturation:100,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 09:20:20',carSaturation:60,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 10:20:20',carSaturation:20,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 10:25:20',carSaturation:50,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 10:50:20',carSaturation:70,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 11:10:20',carSaturation:20,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 11:20:20',carSaturation:90,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 11:40:20',carSaturation:0,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 12:50:20',carSaturation:20,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 13:50:20',carSaturation:80,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 14:50:20',carSaturation:30,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 15:50:20',carSaturation:110,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 16:50:20',carSaturation:70,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, ]- 1
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自己定义x轴时就会导致x轴与y轴数据关联不上,出现如下的情况
解决方案：
将拿到的数据进行转化,转换为如下格式,才能正常渲染
第一步:将时间转换为时间戳并转为数组项格式dataH.forEach((item,i) => { // 将时间转换为时间戳 item.time = new Date(item.time).getTime() let arr = Object.values(item) arr.pop() xAxisD = arr seriesD.push(xAxisD); });- 1
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第二步:xAxis的属性axisLabel设置格式化显示时间的属性,注意安装插件moment,设置min和max最大和最小值,不然就只展示有数据的时间轴,如下图
代码如下axisLabel: { // 格式化x轴显示 formatter: function(value, index) { // 如果时间是 23:59:59 , 格式化为 24:00 if (value === new Date(moment().endOf('day').format('YYYY-MM-DD HH:mm:ss')).getTime()) { return moment(value).format("24:00"); } else { // 其他的时间返回格式化 00:00 return moment(value).format("HH:mm"); } } }, interval: 3600 * 2 * 1000, // 设置x轴分隔间隔，我使用的是毫秒时间戳间隔两小时，如使用秒时间戳不需要x1000 min: function (value) { // 设置x轴最小值，为当天00:00:00时时间戳 // 若想要将time改为x轴数据最小值,则var time = moment(value.min).format('YYYY-MM-DD HH:mm:ss'); var time = moment().startOf('day').format('YYYY-MM-DD HH:mm:ss'); return new Date(time).getTime(); }, max: function (value) { // 设置x轴最大值，为当天23:59:59时时间戳 // 若想要将time改为x轴数据最大值,则var time = moment(value.max).format('YYYY-MM-DD HH:mm:ss'); var time = moment().endOf('day').format('YYYY-MM-DD HH:mm:ss'); return new Date(time).getTime(); }- 1
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第三步:设置时间轴的缩放及曲线不同值得不同颜色展示dataZoom: { type: 'inside', //放大缩小x轴数值 },- 1
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区间值是0-125visualMap: { show:false, pieces: [{ gt: 0, lte: 25, color: '#87E5FF' }, { gt: 25, lte: 50, color: '#FAFF6F' }, { gt: 50, lte: 100, color: '#FF9921' }, { gt: 100, lte: 125, color: '#F83F3F' }] },- 1
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具体的代码如下
<template> <div class="echartBox"> <div class="echartT3" id="echart" >div> div> template> <script> import moment from 'moment'; import { formatTime } from "@/utils/index.js"; export default { data() { return { }; }, props:{ historyData:{ type:Array, default:[] }, }, mounted() { this.initEchart(); }, watch:{ //观察option的变化 option: { handler(newVal, oldVal) { //数据自动刷新，必然需要一个监听机制告诉Echarts重新设置数据 if (this.myChart) { if (newVal) { this.myChart.setOption(newVal); } else { this.myChart.setOption(oldVal); } } else { this.initEchart(); } }, deep: true //对象内部属性的监听，关键。 } }, computed:{ option(){ // let dataH = this.historyData;//后台数据 let dataH =[ {time:'2023-10-27 08:20:20',carSaturation:100,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 09:20:20',carSaturation:60,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 10:20:20',carSaturation:20,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 10:25:20',carSaturation:50,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 10:50:20',carSaturation:70,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 11:10:20',carSaturation:20,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 11:20:20',carSaturation:90,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 11:40:20',carSaturation:0,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 12:50:20',carSaturation:20,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 13:50:20',carSaturation:80,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 14:50:20',carSaturation:30,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 15:50:20',carSaturation:110,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, {time:'2023-10-27 16:50:20',carSaturation:70,analysisImg:require('@/assets/AIRecognition/aiPhoto.png')}, ] let xAxisD=[]; let seriesD=[]; dataH.forEach((item,i) => { // 将时间转换为时间戳 item.time = new Date(item.time).getTime() let arr = Object.values(item) arr.pop() xAxisD = arr seriesD.push(xAxisD); }); return { tooltip: { trigger: 'item', borderRadius: 8,//边框圆角 backgroundColor: 'rgba(11, 66, 131, 1)',//背景颜色（此时为默认色） borderColor: 'rgba(11, 66, 131, 1)', formatter: function(params) { var res = formatTime(params.data[0])+' '+'停车饱和度:'+params.data[1]+'%'+'
'; //电厂名称 dataH.forEach(ite=>{ if(ite.time == params.data[0]){ res+=""; } }) return res; }, textStyle:{color:'#ffff',align:'center',fontSize: 18,} }, grid: { top: '30%', left: '2%', right: '3%', bottom: '8%', containLabel: true }, xAxis: { axisLine: { lineStyle: { color: 'rgba(255, 255, 255, 0.8)', width: 1, } }, boundaryGap: true, show: true, type: "time", // 这里使用时间轴模式 axisLabel: { showMaxLabel:true,//是否显示x轴的最大值 textStyle: { color: 'rgba(255, 255, 255, 0.4)' }, // 格式化x轴显示 formatter: function(value, index) { // 如果时间是 23:59:59 , 格式化为 24:00 // if (value === new Date(moment().endOf('day').format('YYYY-MM-DD HH:mm:ss')).getTime()) { // return moment(value).format("24:00"); // } let time = moment(value).format('YYYY-MM-DD') if (value === new Date(time+' 23:59:59').getTime()) { return moment(value).format("24:00"); }else { // 其他的时间返回格式化 00:00 return moment(value).format("HH:mm"); } } }, interval: 3600 * 2 * 1000, // 设置x轴分隔间隔，我使用的是毫秒时间戳间隔两小时，如使用秒时间戳不需要x1000 min: function (value) { // 设置x轴最小值，为当天00:00:00时时间戳 // 若想要将time改为x轴数据最小值,则var time = moment(value.min).format('YYYY-MM-DD HH:mm:ss'); //var time = moment().startOf('day').format('YYYY-MM-DD HH:mm:ss'); //return new Date(time).getTime(); //以上传入其他时间就展示不出来图表 let time = moment(value.min!='NaN'?value.min:new Date().getTime()).format('YYYY-MM-DD') return new Date(time+' 00:00:00').getTime(); }, max: function (value) { // 设置x轴最大值，为当天23:59:59时时间戳 // 若想要将time改为x轴数据最大值,则var time = moment(value.max).format('YYYY-MM-DD HH:mm:ss'); //var time = moment().endOf('day').format('YYYY-MM-DD HH:mm:ss'); //return new Date(time).getTime(); let time = moment(value.max!='NaN'?value.max:new Date().getTime()).format('YYYY-MM-DD') return new Date(time+' 23:59:59').getTime(); } }, dataZoom: { type: 'inside', //放大缩小x轴数值 }, yAxis: { name:'饱和度（%）', type:'value', nameTextStyle: { color: "#fff", nameLocation: "start", }, min:0, //y轴的最小值 max:125, //y轴最大值 interval:25, //值之间的间隔 type: 'value', splitLine :{ lineStyle:{ type:'dashed',//虚线 color: 'rgba(255, 255, 255, 0.4)' }, show: true //隐藏 }, axisLabel: { textStyle: { color: 'rgba(255, 255, 255, 0.4)' } }, }, visualMap: { show:false, pieces: [{ gt: 0, lte: 25, color: '#87E5FF' }, { gt: 25, lte: 50, color: '#FAFF6F' }, { gt: 50, lte: 100, color: '#FF9921' }, { gt: 100, lte: 125, color: '#F83F3F' }] }, series: [ { data:seriesD, type: 'line', smooth: false,//折线是直线还是曲线 legend:{ show:false, }, }, ], } } }, methods: { initEchart(){ this.myChart = this.$echarts.init(document.getElementById('echart')); this.myChart.setOption(this.option); }, } }; script> <style scoped lang="scss"> .echartT3 { height: 130px; width: 100%; } style>
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引入及使用请参考博客echart的数据渲染，option不刷新问题
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- 原文地址：https://blog.csdn.net/Coco_998/article/details/134076051
