通过Vue实现Excel文件的上传和预览功能

npm install xlsx

<template>
  <div>
    <h2>Excel 文件预览</h2>
    <input type="file" @change="handleFileUpload" accept=".xlsx, .xls" />
    <div v-if="error">{{ error }}</div>
    <table v-if="excelData.length">
      <thead>
        <tr>
          <th v-for="(header, index) in excelData[0]" :key="index">{{ header }}</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="(row, rowIndex) in excelData.slice(1)" :key="rowIndex">
          <td v-for="(cell, cellIndex) in row" :key="cellIndex">{{ cell }}</td>
        </tr>
      </tbody>
    </table>
  </div>
</template>

<script>
import * as XLSX from "xlsx";

export default {
  data() {
    return {
      excelData: [], // 存储 Excel 数据
      error: null // 存储错误信息
    };
  },
  methods: {
    handleFileUpload(event) {
      const file = event.target.files[0];
      if (!file) {
        this.error = "请上传一个有效的文件";
        return;
      }

      const fileExtension = file.name.split('.').pop().toLowerCase();
      if (['xlsx', 'xls'].indexOf(fileExtension) === -1) {
        this.error = "不支持的文件格式，请上传 .xlsx 或 .xls 文件";
        return;
      }

      this.error = null; // 清除错误信息
      const reader = new FileReader();
      reader.onload = (e) => {
        try {
          const data = new Uint8Array(e.target.result);
          const workbook = XLSX.read(data, { type: "array" });
          const firstSheetName = workbook.SheetNames[0];
          const worksheet = workbook.Sheets[firstSheetName];
          const jsonData = XLSX.utils.sheet_to_json(worksheet, { header: 1 });
          this.excelData = jsonData;
        } catch (error) {
          this.error = "解析文件失败，请检查文件内容是否正确";
        }
      };
      reader.readAsArrayBuffer(file);
    }
  }
};
</script>

<template>
  <div>
    <h2>Excel 文件预览</h2>
    <input type="file" @change="handleFileUpload" accept=".xlsx, .xls" />
    <div v-if="error">{{ error }}</div>
    <table v-if="excelData.length">
      <thead>
        <tr>
          <th v-for="(header, index) in excelData[0]" :key="index">{{ header }}</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="(row, rowIndex) in paginatedData" :key="rowIndex">
          <td v-for="(cell, cellIndex) in row" :key="cellIndex">{{ cell }}</td>
        </tr>
      </tbody>
    </table>
    <div v-if="totalPages > 1">
      <button @click="prevPage" :disabled="currentPage === 1">上一页</button>
      <button @click="nextPage" :disabled="currentPage === totalPages">下一页</button>
    </div>
  </div>
</template>

<script>
import * as XLSX from "xlsx";

export default {
  data() {
    return {
      excelData: [],
      currentPage: 1,
      pageSize: 10,
      error: null
    };
  },
  computed: {
    totalPages() {
      return Math.ceil((this.excelData.length - 1) / this.pageSize);
    },
    paginatedData() {
      const start = (this.currentPage - 1) * this.pageSize + 1;
      const end = start + this.pageSize;
      return this.excelData.slice(start, end);
    }
  },
  methods: {
    handleFileUpload(event) {
      const file = event.target.files[0];
      if (!file) {
        this.error = "请上传一个有效的文件";
        return;
      }

      const fileExtension = file.name.split('.').pop().toLowerCase();
      if (['xlsx', 'xls'].indexOf(fileExtension) === -1) {
        this.error = "不支持的文件格式，请上传 .xlsx 或 .xls 文件";
        return;
      }

      this.error = null;
      const reader = new FileReader();
      reader.onload = (e) => {
        try {
          const data = new Uint8Array(e.target.result);
          const workbook = XLSX.read(data, { type: "array" });
          const firstSheetName = workbook.SheetNames[0];
          const worksheet = workbook.Sheets[firstSheetName];
          const jsonData = XLSX.utils.sheet_to_json(worksheet, { header: 1 });
          this.excelData = jsonData;
          this.currentPage = 1; // 重置分页
        } catch (error) {
          this.error = "解析文件失败，请检查文件内容是否正确";
        }
      };
      reader.readAsArrayBuffer(file);
    },
    nextPage() {
      if (this.currentPage < this.totalPages) {
        this.currentPage++;
      }
    },
    prevPage() {
      if (this.currentPage > 1) {
        this.currentPage--;
      }
    }
  }
};
</script>

<select v-if="workbook.SheetNames.length" v-model="selectedSheet" @change="loadSheet">
  <option v-for="(sheet, index) in workbook.SheetNames" :key="index" :value="sheet">{{ sheet }}</option>
</select>