1.效果图

2.html

<div class="biao" id="biao1"></div>

2.js

关键：
color: ['#2db7f5', '#ff6600', '#921AFF', '#c32441', '#FF00FF', '#FF8EFF', '#53FF53', '#F9F900', '#00FFFF'],//关键:自定义图例文字颜色

在legend中添加data,将数据处理成如下格式
legend: {
        x: 'center',
        y: 'top',
        itemGap: 15,//间距
        itemWidth: 10,
        itemHeight: 6,
        data:[
            {name:'铝',textStyle:{color:'#2db7f5'}},
            {name:'铁',textStyle:{color:'#ff6600'}}, 
        ]
    },

var myChart1 = echarts.init(document.getElementById('biao1'));
var option = {
    tooltip: {
        trigger: 'axis',
        axisPointer: {   
            lineStyle: {
                color: '#66B3FF'
            }
        },
    },
    color: ['#2db7f5', '#ff6600', '#921AFF', '#c32441', '#FF00FF', '#FF8EFF', '#53FF53', '#F9F900', '#00FFFF'],//关键:自定义图例文字颜色
    legend: {
        x: 'center',
        y: 'top',
        itemGap: 15,//间距
        itemWidth: 10,
        itemHeight: 6,
        textStyle: { //图例文字的样式
            fontSize: nowSize(12)
        },
    },
    series: {
        type: 'line',
        avoidLabelOverlap: true,
        label: {

        },
        symbol: 'circle',     //设定为实心点
        symbolSize: 10,   //设定实心点的大小
    },
    grid: {
        // top:'15%',
        left: '3%',
        right: '4%',
        bottom: '3%',
        containLabel: true
    },
    xAxis: {
        type: 'category',
        boundaryGap: false,
        axisLine: {
            lineStyle: {
                color: '#97CBFF',
                width: 1,
            }
        },
        axisLabel: {
            textStyle: {
                color: '#ffffff',
                fontSize: nowSize(15)
            },
        }
    },
    yAxis: {
        type: 'value',
        axisLine: {
            lineStyle: {
                // color: '#97CBFF',
                color: '#ffffff',
                width: 0,
            }
        },
        splitLine: {
            lineStyle: {
                color: '#66B3FF',
                width: 1,
                opacity: 0.5
            }
        }
    },
};
// 使用刚指定的配置项和数据显示图表。
myChart1.setOption(option);
function biao1 () {
    $.ajax({
        url: 'http://ckt.ck9696.com/api/domesticStatistical/totalUnitPriceToDay',
        // url: 'http://192.168.0.41:8001/api/domesticStatistical/totalUnitPriceToDay',
        type: 'get',
        dataType: 'json',
        contentType: 'application/json',
        async: true,
        success: function (data) {
            // x轴数据
              
            // var data1 = data.data[0].dates.splice(24)
            var data1 = data.data[0].dates
            var data2 = []
            var colors = ['#2db7f5', '#ff6600', '#921AFF', '#c32441', '#FF00FF', '#FF8EFF', '#53FF53', '#F9F900', '#00FFFF', '#FF8EFF','#2db7f5', '#ff6600', '#921AFF', '#c32441', '#FF00FF', '#FF8EFF', '#53FF53', '#F9F900', '#00FFFF', '#FF8EFF','#2db7f5', '#ff6600', '#921AFF', '#c32441', '#FF00FF', '#FF8EFF', '#53FF53', '#F9F900', '#00FFFF', '#FF8EFF']
            var data3 = []
            // i =1时进行取值
            for (var i = 1; i < data.data.length; i++) {
                var obj = {}
                obj.name = data.data[i].typeName
                // 图例文字颜色
                var Style = {}
                Style.color = colors[i - 1]
                obj.textStyle = Style
                // console.log(obj,'obj');  数据格式为{name:'小组1',textStyle:{color:'red'}} 名值对的形式
                data2.push(obj)
                // var data2 = data2.slice(0, 12)
                // data.data[i].typeName
                var cnt = {}
                cnt.name = data.data[i].typeName
                cnt.type = 'line'
                cnt.smooth = true
                // 过滤数组元素中为0的数据(法一)
                // if(data.data[i].children[i] !== 0){
                //     for (let index = 0; index < data.data[i].children.length; index++) {
                //         const element = data.data[i].children[index];
                //         console.log(element,'element');
                //         if(element !==0){
                //             cnt.data = data.data[i].children
                //             console.log(cnt.data,'cnt.data');
                //             if(cnt.data){
                //                 data3.push(cnt)
                //             }
                //         }
                //     }
                // }
                // 过滤数组元素中为0的数据(法二)
                if (data.data[i].children[i] !== 0) {
                    data.data[i].children =  data.data[i].children.filter(function(value,index){
                        return value !==0
                    })      
                            cnt.data = data.data[i].children
                            if(cnt.data.length == 7){
                                data3.push(cnt)
                            }
                            
                }
            }
            myChart1.setOption({
                legend: {
                    data: data2
                },
                xAxis: {
                    data: data1
                },
                series: data3
            });
        }

    });
}