前端利用vue实现导入和导出功能详细代码

npm install xlsx

<template>
    <el-upload
    action="#"
    :before-upload="handleBeforeUpload"
    :on-success="handleSuccess">
    <el-button>导入Excel</el-button>
    </el-upload>
</template>

<script>
import XLSX from 'xlsx';

export default {
    methods: {
    handleBeforeUpload(file) {
        /* 在这里可以限制文件类型等 */
        const isExcel = file.type === 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
        if (!isExcel) {
        this.$message.error('请选择Excel文件！');
        return false;
        }
        /* 读取文件 */
        const reader = new FileReader();
        reader.onload = (e) => {
        const data = e.target.result;
        const workbook = XLSX.read(data, { type: 'binary' });
        /* 处理工作簿数据 */
        const sheetName = workbook.SheetNames[0];
        const sheetData = XLSX.utils.sheet_to_json(workbook.Sheets[sheetName], { header: 1 });
        console.log(sheetData);
        /* 进一步处理sheetData */
        };
        reader.readAsBinaryString(file.raw);
        return false; // 阻止默认上传行为
    },
    handleSuccess(response, file, fileList) {
        // 上传成功后的处理
    }
    }
}
</script>

function downloadCSV(data, filename) {
    const csvContent = 'data:text/csv;charset=utf-8,\uFEFF' + data.map(row => row.join(',')).join('\n');
    const encodedUri = encodeURI(csvContent);
    const link = document.createElement('a');
    link.setAttribute('href', encodedUri);
    link.setAttribute('download', filename);
    document.body.appendChild(link); // 需要添加到DOM中才能触发点击
    link.click();
}

<template>
    <el-button @click="exportToCSV">导出为CSV</el-button>
</template>

<script>
export default {
    data() {
    return {
        items: [/* 数据数组 */]
    };
    },
    methods: {
    exportToCSV() {
        const csvData = this.items.map(item => [
        item.field1,
        item.field2,
        // ...
        ]);
        downloadCSV(csvData, 'export.csv');
    }
    }
}
</script>

npm install xlsx

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

<script setup>
import { ref, onMounted } from 'vue';
import * as XLSX from 'xlsx';

const fileInput = ref(null);

// 处理文件选择事件
const handleFileChange = () => {
  const file = fileInput.value.files[0];
  if (!file) return;

  const reader = new FileReader();
  reader.onload = (e) => {
    const data = e.target.result;
    const workbook = XLSX.read(data, { type: 'binary' });
    const sheetName = workbook.SheetNames[0];
    const sheetData = XLSX.utils.sheet_to_json(workbook.Sheets[sheetName]);
    console.log(sheetData); // 处理导入的数据
  };
  reader.readAsBinaryString(file);
};

// 在组件挂载时添加键盘监听事件，以便用户可以通过快捷键触发文件选择
onMounted(() => {
  fileInput.value.addEventListener('keydown', (e) => {
    if (e.key === 'Enter') {
      fileInput.value.click();
    }
  });
});
</script>

<script setup>
import { ref } from 'vue';

const exportToCSV = (data, filename = 'export.csv') => {
  const csvContent = 'data:text/csv;charset=utf-8,\uFEFF' + data.map(e => e.join(',')).join('\n');
  const encodedUri = encodeURI(csvContent);
  const link = document.createElement('a');
  link.href = encodedUri;
  link.download = filename;
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
};
</script>

<template>
  <button @click="exportToCSV(dataForExport)">导出为CSV</button>
</template>

<script setup>
// 假设这是你要导出的数据
const dataForExport = [
  ['姓名', '年龄', '城市'],
  ['张三', 28, '北京'],
  ['李四', 32, '上海']
];

// 引入并使用上面定义的exportToCSV函数
import { exportToCSV } from './your-export-function-file';
</script>