xAxis: {
  axisLabel: {
    interval: 0, //x轴文字全部显示
    formatter: function(params) {
      let newParamsName = ''
      const paramsNameNumber = params.length // 获取文数总长度
      const provideNumber = 8 //控制每行的字段
      const rowNumber = Math.ceil(paramsNameNumber / provideNumber)
      if (paramsNameNumber > provideNumber) {
        for (let p = 0; p < rowNumber; p++) {
          const start = p * provideNumber
          const end = start + provideNumber
          const tempStr = p === rowNumber - 1 ? params.substring(start, paramsNameNumber) :
 params.substring(start, end) + '\n'
          newParamsName += tempStr
        }
      } else {
        newParamsName = params
      }
      return newParamsName
    },
  },
},