How to use elementUI+Springboot to implement the excel export function

Steps

Dependency package

First, we need to introduce the vue dependency package
I use this

npm install xlsx@^0.16.0
npm install file-saver@^2.0.2

Among themxlsx The function of the dependency is: to process the data into an excel workbook
file-saverThe function of the dependency is: to save and export the file

element table

Here, the table tag of elemenetUI is actually used to obtain the data. Therefore, we need to add a selector to the table.
In my project, I added an id ：exportExcel

<el-table :data="tableData" id="exportExcel" border ></el-table>

tableData is a custom variable that receives data from the backend

Introduce the package

Then, when you need to write the export The function page is introduced
The details are as follows:

import XLSX from "xlsx";
import FileSaver from "file-saver";

Writing method

In the following code, there is a

var xlxsParam = { raw: true };

The function of this is not to process the data
The main purpose is to prevent data such as dates from being processed, resulting in display errors

    // 导出
    exportExcelData() {
      var xlxsParam = { raw: true };
      // 从表中生成工作簿
      var wb = XLSX.utils.table_to_book(
        document.querySelector("#exportExcel"),
        xlxsParam
      );
      // 获取二进制字符串作为输出
      var wbOut = XLSX.write(wb, {
        bookType: "xlsx",
        bookSST: true,
        type: "array",
      });
      try {
        FileSaver.saveAs(
          // Blob 对象表示一个不可变、原始数据的类文件对象
          // Blob 表示的不一定是js的原生格式数据
          // File 接口基于Blob,
          // 返回一个新创建的Blob对象,其内容由参数中给定的数组串联
          new Blob([wbOut], { type: "application/octet-stream" }),
          // 导出文件名称
          "文件名称.xlsx"
        );
      } catch (e) {
      // 捕捉报错
        if (typeof console != "undefined") {
          console.log(e, wbOut);
        }
      }
      // 将结果返回出来，导出文件
      return wbOut;
    },

Complete example

The complete example is as follows:

<!--页面-->
<template>
  <div>
  <!--导出按钮-->
  <el-button type="primary" @click="exportExcelData()">导出</el-button>
  <!--table数据-->
      <el-table :data="tableData" id="exportExcel" border >
      <el-table-column
        label="字段1"
        type="字段名称"
        align="center"
      ></el-table-column>
      <el-table-column
        prop="字段2"
        label="字段名称"
        align="center"
      ></el-table-column>
    </el-table>
  </div>
<template>
<!--逻辑-->
<script>
// 引入依赖
import FileSaver from "file-saver";
import XLSX from "xlsx";
export default {
  name: "newStaffRecord",
  data() {
    return {
      tableData: [], // 接收的后端数据变量
    };
  },
  methods: {
	    // 导出
    exportExcelData() {
      var xlxsParam = { raw: true };
      // 从表中生成工作簿
      var wb = XLSX.utils.table_to_book(
        document.querySelector("#exportExcel"),
        xlxsParam
      );
      // 获取二进制字符串作为输出
      var wbOut = XLSX.write(wb, {
        bookType: "xlsx",
        bookSST: true,
        type: "array",
      });
      try {
        FileSaver.saveAs(
          // Blob 对象表示一个不可变、原始数据的类文件对象
          // Blob 表示的不一定是js的原生格式数据
          // File 接口基于Blob,
          // 返回一个新创建的Blob对象,其内容由参数中给定的数组串联
          new Blob([wbOut], { type: "application/octet-stream" }),
          // 导出文件名称
          "新人培训记录.xlsx"
        );
      } catch (e) {
        if (typeof console != "undefined") {
          console.log(e, wbOut);
        }
      }
      return wbOut;
    },
	}
}
</script>

Final export result

In my project, I need to implement a query and import function for newbie training records, so the final interface style is like this

The actual exported result is:

To maintain privacy, I have removed the name data

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