VUE—axios请求Echarts折线图

1:安装echarts
cnpm install echarts --s
2：在需要用图表的地方引入
import echarts from 'echarts'
3.编写echarts.vue

<template>
    <div id="index">
        <div id="main" style="width: 100%;height: 400px;"></div>
    </div>
</template>
<script>
    import echarts from 'echarts'
    export default {
        name: 'index',
        data() {
            return {
                charts: '',
                opinionData: ["3", "2", "4", "4", "5"]
            }
        },
        methods: {
            drawLine(id) {
                this.charts = echarts.init(document.getElementById(id))
                this.charts.setOption({
                    tooltip: {
                        trigger: 'axis'
                    },
                    legend: {
                        data: ['近七日收益']
                    },
                    grid: {
                        left: '3%',
                        right: '4%',
                        bottom: '3%',
                        containLabel: true
                    },
                    toolbox: {
                        feature: {
                            saveAsImage: {}
                        }
                    },
                    xAxis: {
                        type: 'category',
                        boundaryGap: false,
                        data: ["1","2","3","4","5"]
                    },
                    yAxis: {
                        type: 'value'
                    },
                    series: [{
                        name: '近七日收益',
                        type: 'line',
                        stack: '总量',
                        data: this.opinionData
                    }]
                })
            }
        },
        mounted() {
            this.$nextTick(function() {
                this.drawLine('main')
            })
        }
    }
</script>

4.接口写在mock里面
首先在mock里面新建一个echarts.json

{
    "categories": [
        "1",
        "2",
        "3",
        "4",
        "5",
        "6",
        "7",
        "8",
        "9",
        "10",
        "11",
        "12"
    ],
    "data": [
        3,
        2,
        4,
        4,
        5
    ]
}

5：在build目录下找到webpack.dev.conf.js文件，编写以下代码

// mock code
const express = require('express')
const app = express()
const test = require('../mock/test.json') 
const echarts = require('../mock/echarts.json') 
const routes = express.Router()
app.use('/api', routes)
// 如果是post请求，那么将get改为post即可
devServer: {
 ...
 before(app){
 app.get('/api/test', (req, res) => {
  res.json(test)
 }),
 app.get('/api/echarts', (req, res) => {
  res.json(echarts)
 })
 }

6:浏览器输入http://localhost:8080/api/echarts
7.新代码

<template>
    <div id="index">
        <div id="main" style="width: 100%;height: 400px;"></div>
    </div>
</template>
<script>
import axios from "axios";
import echarts from 'echarts'
export default{
    name: "index",
    data() {
        return {
            charts: '',
            opinionData: []
        }
    },
    mounted() {
        this.getData();  
    },
    methods: {
        getData() {
            axios.get('http://localhost:8080/api/echarts').then(response => {
                console.log(response.data);
                this.opinionData =response.data.data;
                this.drawLine('main');
            }, response => {
                console.log("error");
            });
        },
        drawLine(id) {
            this.charts = echarts.init(document.getElementById(id))
            this.charts.setOption({
                tooltip: {
                    trigger: 'axis'
                },
                legend: {
                    data: ['近七日收益']
                },
                grid: {
                    left: '3%',
                    right: '4%',
                    bottom: '3%',
                    containLabel: true
                },

                toolbox: {
                    feature: {
                        saveAsImage: {}
                    }
                },
                xAxis: {
                    type: 'category',
                    boundaryGap: false,
                    data: ["1","2","3","4","5"]
                },
                yAxis: {
                    type: 'value'
                },
                series: [{
                    name: '近七日收益',
                    type: 'line',
                    stack: '总量',
                    data: this.opinionData
                }]
            })
        },
    }
}</script>