使用echarts官方柱状图时，有些示例是没有展示每个柱子所代表的的数值的，所以需要自己进行设置一下。

• 官方柱状图排序示例代码如下：

option = {
    dataset: [{
        dimensions: ['name', 'age', 'profession', 'score', 'date'],
        source: [
            [' Hannah Krause ', 41, 'Engineer', 314, '2011-02-12'],
            ['Zhao Qian ', 20, 'Teacher', 351, '2011-03-01'],
            [' Jasmin Krause ', 52, 'Musician', 287, '2011-02-14'],
            ['Li Lei', 37, 'Teacher', 219, '2011-02-18'],
            [' Karle Neumann ', 25, 'Engineer', 253, '2011-04-02'],
            [' Adrian Groß', 19, 'Teacher', null, '2011-01-16'],
            ['Mia Neumann', 71, 'Engineer', 165, '2011-03-19'],
            [' Böhm Fuchs', 36, 'Musician', 318, '2011-02-24'],
            ['Han Meimei ', 67, 'Engineer', 366, '2011-03-12'],
        ]
    }, {
        transform: {
            type: 'sort',
            config: { dimension: 'score', order: 'desc' }
        }
    }],
    xAxis: {
        type: 'category',
        axisLabel: { interval: 0, rotate: 30 },
    },
    yAxis: {},
    series: {在这里插入代码片
        type: 'bar',
        encode: { x: 'name', y: 'score' },
        datasetIndex: 1
    }
};

• 想要添加柱子上方的数值只需要在 series 字段中添加如下内容即可：

series: {
	type: 'bar',
	encode: { x: 'name', y: 'score' },
	datasetIndex: 1,
	label: {
		normal: {
			show: true,
			position: 'top'
		},
		formatter: '{@value}'
	}
}

• position 字段可以自行修改，支持 top/bottom/left/right ，修改过后如下图：