vue脚手架引入echars5.0报错“export ‘default‘ (imported as ‘echarts‘) was not found in ‘echarts‘

vue脚手架引入echars5.0报错"export 'default' (imported as 'echarts') was not found in 'echarts'

错误的引入方法：

import echarts from 'echarts'

解决办法：

第一种方法：

import * as echarts from 'echarts';

第二种方法：

let echarts = require('echarts');