Clever interaction between Vue and Excel: how to achieve batch filling and import of data

The clever interaction between Vue and Excel: How to realize batch filling and importing of data

Introduction:
Vue, as a popular JavaScript framework, is widely used in Web development. As a common spreadsheet software, Excel is widely used for data processing and analysis. This article will introduce how to realize clever interaction with Excel in Vue applications and realize batch filling and importing of data.

1. Excel data import

1.1 Implementation of Excel file reading function

First, we need to implement the Excel file reading function. The Vue framework does not directly support reading Excel files, but we can use the third-party library xlsx to achieve this function.

Install the xlsx library in the project:

npm install xlsx --save

Prepare the Excel file to be imported, and use the following code in the Vue component to implement the Excel file reading function:

<template>
  <div>
    <input type="file" @change="handleFileChange" />
  </div>
</template>

<script>
import XLSX from 'xlsx';

export default {
  methods: {
    handleFileChange(event) {
      const file = event.target.files[0];
      const reader = new FileReader();
      reader.onload = (e) => {
        const data = new Uint8Array(e.target.result);
        const workbook = XLSX.read(data, { type: 'array' });
        const worksheet = workbook.Sheets[workbook.SheetNames[0]];
        const jsonData = XLSX.utils.sheet_to_json(worksheet, { header: 1 });
        // 处理导入的jsonData
      };
      reader.readAsArrayBuffer(file);
    },
  },
};
</script>

In the above code, we trigger file selection through the change event of the input tag, and then read the file content through FileReader. Through the reading function of the XLSX library, we can convert the contents of the Excel file into data in JSON format to facilitate further processing.

1.2 Import data processing

In the above code, we convert the read Excel file content into jsonData. Next, we can process jsonData according to needs, such as storing the data in the database, displaying it on the page, etc.

The following is a simple example to display jsonData in a Vue component:

<template>
  <div>
    <table>
      <thead>
        <tr>
          <th v-for="header in headers" :key="header">{{header}}</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="(row, index) in jsonData" :key="index">
          <td v-for="(cell, columnIndex) in row" :key="columnIndex">{{cell}}</td>
        </tr>
      </tbody>
    </table>
  </div>
</template>

<script>
export default {
  data() {
    return {
      headers: [], // Excel文件的表头
      jsonData: [], // Excel文件读取的数据
    };
  },
  methods: {
    handleFileChange(event) {
      // ...
      const jsonData = XLSX.utils.sheet_to_json(worksheet, { header: 1 });
      this.headers = jsonData[0];
      this.jsonData = jsonData.slice(1);
    },
  },
};
</script>

In the above code, we use Vue's array loop instruction v-for to display the header and data.

2. Data batch filling

2.1 Prepare the Excel file template to be filled

In the data batch filling function, an Excel file template is usually prepared in advance, which contains Merge cells, formulas, formats, etc. This template can be created using Excel software and is available for download in the Vue application.

2.2 Implement Excel template download

Add a button in the Vue component and click the button to trigger the Excel template download function:

<template>
  <div>
    <button @click="downloadTemplate">下载Excel模板</button>
  </div>
</template>

<script>
import XLSX from 'xlsx';

export default {
  methods: {
    downloadTemplate() {
      const templateData = []; // Excel模板数据，可以通过数据处理来生成
      const worksheet = XLSX.utils.aoa_to_sheet(templateData);
      const workbook = XLSX.utils.book_new();
      XLSX.utils.book_append_sheet(workbook, worksheet, 'Sheet1');
      XLSX.writeFile(workbook, 'template.xlsx');
    },
  },
};
</script>

In the above code, we use Functions of the XLSX library to generate Excel templates. Through the downloadTemplate method, we can download the generated template locally.

2.3 Batch filling data

By reading the Excel file, we can obtain the data to be filled. Filling these data into Excel templates requires the use of related functions of the XLSX library.

The following is an example to implement the data batch filling function in the Vue component:

<template>
  <div>
    <input type="file" @change="handleFileChange" />
    <button @click="fillData">批量填充数据</button>
  </div>
</template>

<script>
import XLSX from 'xlsx';

export default {
  data() {
    return {
      templateData: [], // Excel模板数据
      jsonData: [], // 导入的数据
    };
  },
  methods: {
    handleFileChange(event) {
      // ...
    },
    fillData() {
      const workbook = XLSX.read(this.templateData, { type: 'array' });
      const worksheet = workbook.Sheets[workbook.SheetNames[0]];
      const jsonData = this.jsonData;
      // 批量填充数据的逻辑处理
      // ...
      const worksheetWithData = XLSX.utils.sheet_to_json(worksheet, { header: 1 });
      const worksheetWithDataArray = XLSX.utils.aoa_to_sheet(worksheetWithData);
      workbook.Sheets[workbook.SheetNames[0]] = worksheetWithDataArray;
      XLSX.writeFile(workbook, 'result.xlsx');
    },
  },
};
</script>

In the above code, we use the corresponding function of the XLSX library to fill data in the fillData method. Finally, the Excel file filled with data is exported through XLSX.writeFile.

Conclusion:
Through the clever interaction between Vue and Excel, we can implement batch filling and importing of data. In this article, we introduce how to use the third-party library xlsx to read and export Excel files, and how to fill data into Excel templates. Through these functions, we can process data more efficiently and improve work efficiency.

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