实现图例效果

获取最大值方法：

    maxSecond(array) {let max = Number.MIN_SAFE_INTEGER;for (let i = 0; i < array.length; i++) {const secondElement = parseInt(array[i][1]);if (secondElement > max) {max = secondElement;}}return max;},

 获取最大值索引：

    maxSecondIndex(array) {let max = Number.MIN_SAFE_INTEGER;let maxIndex = -1;for (let i = 0; i < array.length; i++) {const secondElement = parseInt(array[i][1]);if (secondElement > max) {max = secondElement;maxIndex = i;}}return maxIndex;},

获取最小值方法：

    minSecond(array) {let min = Number.MAX_SAFE_INTEGER;for (let i = 0; i < array.length; i++) {const secondElement = parseInt(array[i][1]);if (secondElement < min) {min = secondElement;}}return min;},

获取最小值索引：

    minSecondIndex(array) {let min = Number.MAX_SAFE_INTEGER;let minIndex = -1;for (let i = 0; i < array.length; i++) {const secondElement = parseInt(array[i][1]);if (secondElement < min) {min = secondElement;minIndex = i;}}return minIndex;},

    // 按类型柱状图1setLine1(data) {var newData = []data.forEach(thisData => {var td =[]td.push(thisData.recordDate)td.push(thisData.totalCount)newData.push(td)})const max = this.maxSecond(newData)const maxIndex = this.maxSecondIndex(newData)const min = this.minSecond(newData)const minIndex = this.minSecondIndex(newData)var option3;option3 =  {title: {text: '操作票数量'},tooltip: {trigger: 'axis'},legend: {data: ['数量']},calculable: true,xAxis: {type: 'category',boundaryGap: false,},yAxis: {type: 'value'},series: [{name: '操作票',data: newData,markPoint: {data: [{ name: 'Max', value: max, xAxis: maxIndex, yAxis: max },{ name: 'Min', value: min, xAxis: minIndex, yAxis: min }],label: {show: true,color: '#fff', // 修改字体颜色为红色fontSize:17}},type: 'bar',symbol: 'none',  //取消折点圆圈smooth: true,  //折线平滑itemStyle: {color: new echarts.graphic.LinearGradient(0, 0, 0, 1,[{offset: 0, color: '#0cbd9a'}, // 渐变起始处的颜色：淡蓝色{offset: 1, color: '#29bf71'} // 渐变结束处的颜色：浅蓝色])},// 提示框展示配置tooltip: {// 提示框展示的内容valueFormatter: function (value) {return value + "张";},},}]};if (this.dataEchart == null || this.dataEchart == '' || this.dataEchart == undefined) {this.dataEchart = echarts.init(this.$refs.dataEchart1, 'macarons')}this.dataEchart.clear()this.dataEchart.setOption(option3,true)},

根据代码自己将值替换即可实现上面图的效果