柱状图

描述:当前是关于Echarts图表中的 柱状图 示例。
 
               var liftMonthDtoList=[
      {month:1,thisYear:30,lastYear:33},
      {month:2,thisYear:32,lastYear:38},
      {month:3,thisYear:31,lastYear:30},
      {month:4,thisYear:30,lastYear:36},
   ]
   var data=[],year=[],lastYear=[];
   liftMonthDtoList.forEach((item) => {
      data.push(item.month + "月");
      year.push(Number(item.thisYear).toFixed(2));
      lastYear.push(Number(item.lastYear).toFixed(2));
    })
    option = {
      backgroundColor: '#000',
      tooltip: {
        trigger: 'axis',
        axisPointer: {
          type: 'shadow'
        }
      },
      grid: {
        top: '14%',
        right: '3%',
        left: '7%',
        bottom: '20%'
      },
      legend: {
        top: '-3%',
        itemWidth: 10,
        itemHeight: 10,
        textStyle: {
          color: "#ffffff",
          fontSize: 15
        },
        data: ['用水量', '去年同期'],

      },
      xAxis: [{
        type: 'category',
        data: data,
        axisLine: {
          lineStyle: {
            color: 'rgba(255,255,255,1)'
          }
        },
        axisLabel: {
          margin: 10,
          color: '#e2e9ff',
        },
      }],
      yAxis: [{
        name: '万m³',
        boundaryGap: ['0%', '20%'],
        nameTextStyle: {
          verticalAlign: 'middle',
          align: "right"
        },
        axisLabel: {
          formatter: '{value}',
          color: '#e2e9ff',
        },
        axisLine: {
          show: false,
          lineStyle: {
            color: 'rgba(255,255,255,1)'
          }
        },
        splitLine: {
          lineStyle: {
            color: 'rgba(255,255,255,0.12)'
          }
        }
      }],
      series: [{
        name: "用水量",
        type: 'bar',
        data: year,
        barWidth: '12px',
        itemStyle: {
          color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
            offset: 0,
            color: 'rgba(4, 187, 255, 1)' // 0% 处的颜色
          }, {
            offset: 1,
            color: 'rgba(4, 187, 255, 1)' // 100% 处的颜色
          }], false),
          borderRadius: [5, 5, 0, 0],
          shadowColor: 'rgba(0,160,221,1)',
          shadowBlur: 4,
        }
      }, {
        name: "去年同期",
        type: 'bar',
        data: lastYear,
        barWidth: '12px',
        itemStyle: {
          color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
            offset: 0,
            color: 'rgba(250, 201, 87, 1)' // 0% 处的颜色
          }, {
            offset: 1,
            color: 'rgba(250, 201, 87, 1)' // 100% 处的颜色
          }], false),
          borderRadius: [5, 5, 0, 0],
          shadowColor: 'rgba(0,160,221,1)',
          shadowBlur: 4,
        }
      }]
    };