vue中使用echarts，导入JSON数据画图

1、将.json文件放置在与index.html同一目录下

2、编写vue界面，在script中加载json文件

3、在script中加载处理json数据

4、用处理后的数据画图

vue界面代码如下：

<script>
import * as echarts from "echarts"  //引入echarts核心模块

export default {
  mounted () {
    this.fetchDataFromLocalFile();
  },
  methods: {
    fetchDataFromLocalFile () {
      fetch('./data.json')  //data.json需要放在与index.html（/public）放在同一目录下
       .then(response=>response.json())
       .then(data=>{
        const consumptionData = data[0].data
            .sort((a, b) => a.finalTotalAmount - b.finalTotalAmount)
            .slice(0, 5)     
            .map(item => ({  //对数组中的每个 item 执行一个函数。这个函数返回一个新的对象，该对象包含两个属性：
              province: item.provinceName, // 提取省份名称
              amount: item.finalTotalAmount // 提取消费金额
            }))
          console.log(consumptionData) // 在控制台打印处理后的消费数据
       
      var myChart = echarts.init(document.getElementById('main'));

      // 指定图表的配置项和数据
      const option = {
            title: {
              text: '2020年消费额最低的5个省份',
              left: 'center'
            },
            xAxis: {
              type: 'category',
              data: consumptionData.map(item => item.province) // 设置x轴的数据为省份名称
            },
            yAxis: {
              type: 'value',
              axisLabel: {
                fontSize: 8 // 设置y轴标签的字号大小为8px
              }
            },
            series: [{
              data: consumptionData.map(item => item.amount), // 设置柱状图的数据为消费金额
              type: 'bar', // 设置图表类型为柱状图
              label: {
                show: true, // 显示标签
                position: 'top' // 标签显示在柱状图的顶部
              }
            },
            {
              data: consumptionData.map(item => item.amount), // 设置柱状图的数据为消费金额
              type: 'line', // 设置图表类型为柱状图
              label: {
                show: true, // 显示标签
                position: 'top' // 标签显示在柱状图的顶部
              }
            }]
          };
        myChart.setOption(option);// 将图表的配置应用到图表上
        })
    }
  },
  
}
</script>


<template>
  <div id="main" style="width: 1000px;height: 400px;"></div>
</template>

data数据为：

[
  {
    "msg": "操作成功",
    "code": 200,
    "data": [
      {
        "outTradeNo": "762726941436512",
        "finalTotalAmount": 784432.0,
        "provinceName": "广东",
        "regionName": "华东",
        "userName": "西门清",
        "id": 78444
      },
      {
        "outTradeNo": "122515318746846",
        "finalTotalAmount": 207260.0,
        "provinceName": "贵州",
        "regionName": "滕成",
        "userName": "滕成",
        "id": 78445
      },
      {
        "outTradeNo": "189377665987296",
        "finalTotalAmount": 240486.0,
        "provinceName": "澳门",
        "regionName": "西南",
        "userName": "尉迟莉",
        "id": 78446
      },
      {
        "outTradeNo": "727564233416679",
        "finalTotalAmount": 62997.0,
        "provinceName": "山东",
        "regionName": "华东",
        "userName": "庞茂",
        "id": 78447
      },
      {
        "outTradeNo": "712939938964818",
        "finalTotalAmount": 509385.0,
        "provinceName": "湖北",
        "regionName": "华中",
        "userName": "司马言若",
        "id": 78448
      },
      {
        "outTradeNo": "366811414371877",
        "finalTotalAmount": 40392.0,
        "provinceName": "吉林",
        "regionName": "华中",
        "userName": "卫娅琦",
        "id": 78449
      },
      {
        "outTradeNo": "625397617582265",
        "finalTotalAmount": 333611.0,
        "provinceName": "云南",
        "regionName": "东北",
        "userName": "司马真",
        "id": 78450
      },
      {
        "outTradeNo": "245924562386116",
        "finalTotalAmount": 273301.0,
        "provinceName": "新疆",
        "regionName": "华南",
        "userName": "朱贵",
        "id": 78451
      },
      {
        "outTradeNo": "5621398864121127",
        "finalTotalAmount": 147177.0,
        "provinceName": "西北",
        "regionName": "西南",
        "userName": "宇文娅",
        "id": 78452
      },
      {
        "outTradeNo": "346272442916713",
        "finalTotalAmount": 197594.0,
        "provinceName": "重庆",
        "regionName": "西北",
        "userName": "岑清飞",
        "id": 78453
      },
      {
        "outTradeNo": "583479347648972",
        "finalTotalAmount": 60418.0,
        "provinceName": "湖南",
        "regionName": "重庆",
        "userName": "广东",
        "id": 78454
      }
    ]
  }
]