1.在终端输入：npm install echarts  安装echarts组件

2.代码如下

<template>
  <div class="app-container">
    <!--根据条件查询-->
    <el-form
      :model="queryParams"
      ref="queryForm"
      :inline="true"
      label-width="85px"
    >
      <el-form-item label="创建日期" prop="createTime">
        <el-date-picker
          v-model="dateRange"
          style="width: 240px"
          value-format="yyyy-MM-dd"
          type="daterange"
          range-separator="-"
          start-placeholder="开始日期"
          end-placeholder="结束日期"
        ></el-date-picker>
      </el-form-item>
      <el-form-item>
        <el-button
          type="primary"
          icon="el-icon-search"
          size="mini"
          @click="handleQuery"
          >搜索</el-button
        >
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery"
          >重置</el-button
        >
      </el-form-item>
    </el-form>
    <!--列表-->
    <el-row>
      <el-col :span="12">
        <el-table
          v-loading="loading"
          :data="tableList"
          border
          max-height="350"
          show-summary
          :summary-method="getSummaries"
        >
          <el-table-column label="序号" align="center" type="index" width="50"/>
          <el-table-column label="名称" align="center" prop="name" />
          <el-table-column label="数量" align="center" prop="count" />
        </el-table>
        <pagination
          v-show="total > 0"
          :total="total"
          :page.sync="queryParams.pageNum"
          :limit.sync="queryParams.pageSize"
          @pagination="getList"
        />
      </el-col>
      <!--图表-->
      <el-col :span="12">
        <div
          class="grid-content bg-purple-light"
          style="border: 1px solid #e4e7eb"
        >
          <div
            :class="className"
            id="drawChart"
            :style="{ height: height, width: width }"
          ></div>
        </div>
      </el-col>
    </el-row>
  </div>
</template>

<script>
import {
  listProduct,
  listProductChart,
} from "@/api/report";
//导入echarts
import echarts from "echarts";
//设置图表大小
import resize from "@/views/dashboard/mixins/resize";
import { parse } from "@babel/parser";
export default {
  name: "ColumnarChart",
  mixins: [resize],
  props: {
    className: {
      type: String,
      default: "chart",
    },
    width: {
      type: String,
      default: "100%",
    },
    height: {
      type: String,
      default: "350px",
    },
    autoResize: {
      type: Boolean,
      default: true,
    },
  },
  data() {
    return {
      // 遮罩层
      loading: true, //如果请求数据改为true
      //日期范围
      dateRange: [],
      // 表格数据
      tableList: [],
      // 总条数
      total: 0,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
      },
    };
  },
  created() {
    this.getList();
  },
  mounted() {
    this.drawChart();
  },
  methods: {
    /** 搜索按钮操作 */
    handleQuery() {
      this.getList();
      this.drawChart();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.dateRange = [];
      this.resetForm("queryForm");
      this.handleQuery();
    },
    /** 查询列表 */
    getList() {
      this.loading = true;
      this.queryParams.createTimeFrom = "";
      this.queryParams.createTimeTo = "";
      if (null != this.dateRange && "" != this.dateRange) {
        this.queryParams.createTimeFrom = this.dateRange[0];
        this.queryParams.createTimeTo = this.dateRange[1];
      }
      listProduct(this.queryParams).then((response) => {
        this.tableList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },
    //列表总数合计
    getSummaries(param) {
      const { columns, data } = param;
      /* console.log(param)   */
      const sums = [];
      columns.forEach((column, index) => {
        if (index === 0) {
          sums[index] = "合计";
          return;
        }
        const values = data.map((item) => Number(item[column.property]));
        //this.closeList等等是后台返回的总的数据，然后取值到这里
        if (column.property === "count") {
          sums[index] = values
            .reduce((prev, curr) => {
              return prev + curr;
            }, 0)
            .toFixed(2);
        }
      });
      return sums;
    },
    drawChart() {
      this.queryParams.createTimeFrom = "";
      this.queryParams.createTimeTo = "";
      if (null != this.dateRange && "" != this.dateRange) {
        this.queryParams.createTimeFrom = this.dateRange[0];
        this.queryParams.createTimeTo = this.dateRange[1];
      }
      // 绘制图表
      listProductChart(this.queryParams).then((response) => {
        let myChart = echarts.init(document.getElementById("drawChart"));
        if (response.data) {
          myChart.setOption({
            title: {
              text: "数量",
              x: "center",
              textStyle: {
                //文字颜色
                //color: "#ccc",
                fontStyle: "normal",
                //字体大小
                fontSize: 15,
              },
            },
            tooltip: {},
            dataZoom: [
              {
                type: "slider", //图表下方的伸缩条
                show: true, //是否显示
                realtime: true, //拖动滚动条时是否动态的更新图表数据
                height: 15, //滚动条高度
                start: 0, //滚动条开始位置（共100等份）
                end: 30, //结束位置（共100等份）
              },
              {
                type: "inside", //鼠标滚轮
                realtime: true,
                //还有很多属性可以设置，详见文档
              },
            ],
            xAxis: {
              data: response.data.nameList,
            },
            yAxis: {},
            series: [
              {
                name: "退换货数量",
                type: "bar",
                data: response.data.countList,
                itemStyle: {
                  normal: {
                    color: "#5B9BD5",
                    label: {
                      show: true, //开启显示
                      position: "top", //在上方显示
                      textStyle: {
                        //数值样式
                        color: "gray",
                        fontSize: 11,
                      },
                    },
                  },
                },
                barWidth: 20, //柱图宽度
              },
            ],
          });
        } else {
          echarts.init(document.getElementById("drawChart")).dispose();//无数据则清空图表内容
        }
      });
    }
  }
};
</script>

3.页面结果