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vuejs导入excel(把excel表格解析成JSON数据)

219 ℃

今天做项目的时候需要通过element-ui做一个导入excel并解析成json数据,下面给大家介绍一下基本代码!

<template>
  <div class="app-container">
    <upload-excel-component
      :on-success="handleSuccess"
      :before-upload="beforeUpload"
    />
    <el-table
      :data="tableData"
      border
      highlight-current-row
      style="width: 100%;margin-top:20px;"
    >
      <el-table-column
        v-for="item of tableHeader"
        :key="item"
        :prop="item"
        :label="item"
      />
    </el-table>
  </div>
</template>

<script>
import uploadExcelComponent from "@/components/UploadExcel.vue";
export default {
  name: "UploadExcel",
  components: { uploadExcelComponent },
  data() {
    return {
      tableData: [],
      tableHeader: []
    };
  },
  methods: {
    beforeUpload(file) {
      const isLt1M = file.size / 1024 / 1024 < 1;
      if (isLt1M) {
        return true;
      }
      this.$message({
        message: "Please do not upload files larger than 1m in size.",
        type: "warning"
      });
      return false;
    },
    //成功后获取数据
    handleSuccess({ results, header }) {
      console.log("results=====", results);
      this.tableData = results;
      this.tableHeader = header;
    }
  }
};
</script>

把导入解析封装到UploadExcel里面

<template>
  <div>
    <input
      ref="excel-upload-input"
      class="excel-upload-input"
      type="file"
      accept=".xlsx, .xls"
      @change="handleClick"
    />
    <div
      class="drop"
      @drop="handleDrop"
      @dragover="handleDragover"
      @dragenter="handleDragover"
    >
      Drop excel file here or
      <el-button
        :loading="loading"
        style="margin-left:16px;"
        size="mini"
        type="primary"
        @click="handleUpload"
      >
        Browse
      </el-button>
    </div>
  </div>
</template>

<script>
import XLSX from "xlsx";
export default {
  props: {
    beforeUpload: Function, // eslint-disable-line
    onSuccess: Function // eslint-disable-line
  },
  data() {
    return {
      loading: false,
      excelData: {
        header: null,
        results: null
      }
    };
  },
  methods: {
    generateData({ header, results }) {
      this.excelData.header = header;
      this.excelData.results = results;
      this.onSuccess && this.onSuccess(this.excelData);
    },
    handleDrop(e) {
      e.stopPropagation();
      e.preventDefault();
      if (this.loading) return;
      const files = e.dataTransfer.files;
      if (files.length !== 1) {
        this.$message.error("Only support uploading one file!");
        return;
      }
      const rawFile = files[0]; // only use files[0]
      if (!this.isExcel(rawFile)) {
        this.$message.error(
          "Only supports upload .xlsx, .xls, .csv suffix files"
        );
        return false;
      }
      this.upload(rawFile);
      e.stopPropagation();
      e.preventDefault();
    },
    handleDragover(e) {
      e.stopPropagation();
      e.preventDefault();
      e.dataTransfer.dropEffect = "copy";
    },
    handleUpload() {
      this.$refs["excel-upload-input"].click();
    },
    handleClick(e) {
      const files = e.target.files;
      const rawFile = files[0]; // only use files[0]
      if (!rawFile) return;
      this.upload(rawFile);
    },
    upload(rawFile) {
      this.$refs["excel-upload-input"].value = null; // fix can't select the same excel
      if (!this.beforeUpload) {
        this.readerData(rawFile);
        return;
      }
      const before = this.beforeUpload(rawFile);
      if (before) {
        this.readerData(rawFile);
      }
    },
    readerData(rawFile) {
      this.loading = true;
      return new Promise((resolve, reject) => {
        const reader = new FileReader();
        reader.onload = e => {
          const data = e.target.result;
          const workbook = XLSX.read(data, { type: "array" });
          const firstSheetName = workbook.SheetNames[0];
          const worksheet = workbook.Sheets[firstSheetName];
          const header = this.getHeaderRow(worksheet);
          const results = XLSX.utils.sheet_to_json(worksheet);
          this.generateData({ header, results });
          this.loading = false;
          resolve();
        };
        reader.readAsArrayBuffer(rawFile);
      });
    },
    getHeaderRow(sheet) {
      const headers = [];
      const range = XLSX.utils.decode_range(sheet["!ref"]);
      let C;
      const R = range.s.r;
      /* start in the first row */
      for (C = range.s.c; C <= range.e.c; ++C) {
        /* walk every column in the range */
        const cell = sheet[XLSX.utils.encode_cell({ c: C, r: R })];
        /* find the cell in the first row */
        let hdr = "UNKNOWN " + C; // <-- replace with your desired default
        if (cell && cell.t) hdr = XLSX.utils.format_cell(cell);
        headers.push(hdr);
      }
      return headers;
    },
    isExcel(file) {
      return /\.(xlsx|xls|csv)$/.test(file.name);
    }
  }
};
</script>

<style scoped>
.excel-upload-input {
  display: none;
  z-index: -9999;
}
.drop {
  border: 2px dashed #bbb;
  width: 600px;
  height: 160px;
  line-height: 160px;
  margin: 0 auto;
  font-size: 24px;
  border-radius: 5px;
  text-align: center;
  color: #bbb;
  position: relative;
}
</style>

这样应该可以了!

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标签: excel, json数据, 表格解析

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