echarts设置柱状图数值在顶部，并且添加百分比，且为0时不显示

在series --> label 中添加属性 fromatter

position: 'top'在顶部显示

 

option = {
    legend: {
        itemWidth: 15,
        itemHeight: 4,
        fontSize: 12,
        data: ['同比', '环比'],
        right: 55,
        top: 10,
        orient: 'vertical',

    },
    tooltip: {},
    // 设置图标距离上下左右的距离
    grid: {
        top: 75,
        left: 10,
        right: 50,
        'auto',
        height:'auto'
    },
    xAxis: {

        type: 'category',
        //x轴文字配置
        axisLabel: {
            show: true,
            inside: false,
            // align:'left',
            margin: 20,
            textStyle: {
                color: '#1a1a1a',
                fontSize: '14'
            }
        },
        axisTick: {
            show: false
        }, //去掉x轴刻度线
        data: [],
        axisLine: {
            show: true,
            length: 2,
            lineStyle: {
                color: "#B5B2B5"
            },
        }
    },
    yAxis: {
        //y轴不显示
        show: false,
        inverse: false, //是否反向坐标
        axisLine: {
            show: false,
        },
        // y轴刻度不显示
        axisLabel: {
            formatter: function () {
                return "";
            }
        },
        splitLine: {
            show: false
        },
        splitArea: {
            show: false
        }
    },
    series: [{
            name: '同比',
            type: 'bar',
            barGap: '50%',
            barCategoryGap: '20%',
            barWidth: '15%',
            // stack: 'one',
            data: [],
            itemStyle: {
                normal: {
                    label: {
                        show: true, //开启显示
                        position: 'top', //在上方显示
                        formatter: function (val) {
                            if (val.value !== 0) {
                              return val.value+'%';
                            }  else {
                              return '';
                            }
                          },
                        textStyle: { //数值样式
                            color: '#1a1a1a',
                            fontSize: 12
                        }
                    },
                    barBorderRadius: 100,
                    color: new echarts.graphic.LinearGradient(
                        0, 1, 0, 0,
                        [{
                                offset: 0,
                                color: '#f89741'

                            },
                            {
                                offset: 1,
                                color: '#fa6206'
                            }
                        ]
                    )
                }
            },
        }, {
            name: '环比',
            type: 'bar',
            barGap: '50%',
            barWidth: '15%',
            barCategoryGap: '20%',
            data: [],
            itemStyle: {
                normal: {
                    label: {
                        show: true, //开启显示
                        position: 'top', //在上方显
                        formatter: function (val) {
                            if (val.value !== 0) {
                              return val.value+'%';
                            } else {
                              return '';
                            }
                          },
                        textStyle: { //数值样式
                            color: '#1a1a1a',
                            fontSize: 12
                        }
                    },
                    barBorderRadius: 100,
                    color: new echarts.graphic.LinearGradient(
                        0, 1, 0, 0,
                        [{
                                offset: 0,
                                color: '#42d3f7'
                                // color: '#0c7be3'


                            },
                            {
                                offset: 1,
                                //  color: '#42d3f7'
                                color: '#0c7be3'
                            }
                        ]
                    )
                }
            },
        },

    ]
};