export_Excel() {

        var listStudent = null;

        this.axios.get('api/exportStudentList').then((response) => {

          listStudent = response.data.list;

        })

                //↑ 是获取数据

        this.$confirm('确定要导出表格数据么？', '提示', {

          confirmButtonText: '确定',

          cancelButtonText: '取消',

          type: 'warning'

        }).then(() => {

          require.ensure([], () => {

            const {

              export_json_to_excel

            } = require('../vendor/Export2Excel')

            const tHeader = ['ID', '姓名', '年龄', '性别', '生日']

            const filterVal = ['id', 'name', 'age', 'sex', 'birthday']

            const list = listStudent

            const data = this.formatJson(filterVal, list)

            export_json_to_excel(tHeader, data, '商品管理列表')

          })

        }).catch(() => {})

      },

      formatJson(filterVal, jsonData) {

        return jsonData.map(v => filterVal.map(j => v[j]))

      }