vue中使用excel單個/批量導出表格數據

在後臺管理系統中使用excel導出表格數據很常見，下面簡單看下其實現過程👇👇👇

$\color{#FF7256}{安裝依賴}$

 npm install -S file-saver xlsx
 
 npm install -D script-loader

$\color{#FF7256}{引入文件}$

• 在src目錄下新建一個文件夾(excel)引入Blod.js和Export2Excel.js,如下圖所示：
  

• 文件鏈接:鏈接: https://pan.baidu.com/s/1TrUAciotF228a8EaTWu49Q 提取碼: 5gv8

  如果以上鍊接打不開，在博文最後有貼Blod.js和Export2Excel.js文件的內容。

$\color{#FF7256}{實現}$

• $\color{#00CED1}{單個導出}$

  • 按鈕

    <v-btn small color="info" @click="exportsExcel(props.item)">導出</v-btn>
    

  • exportsExcel()

    exportsExcel(item) {  //item是點擊“導出”按鈕傳的參數
      require.ensure([], () => {
        const { exportJsonToExcel ,formatJson} = require("../../execl/Export2Excel"); //這裏必須使用絕對路徑
        // 導出的表頭名
        const tHeader = ["姓名", "年齡"];
        // 導出的表頭字段名
        const filterVal = ["name", "age"];
        const list = [];
        list.push({
          name: item.name,
          age: item.age
        });
        const data = formatJson(filterVal, list);
        exportJsonToExcel(tHeader, data, "用戶信息"); // 第三個參數導出的表格名稱（根據需要自己命名）
      });
    }
    

  • 效果圖

• $\color{#00CED1}{批量導出}$

  • 按鈕

    <v-btn color="primary" @click="batchExport">批量導出</v-btn>
    

  • batchExport()

    batchExport() {
      require.ensure([], () => {
        const {
          exportJsonToExcel,
          formatJson
        } = require("../../execl/Export2Excel");   //引入Export2Excel文件中的方法
        // excel表中要顯示的標題頭
        const tHeader = ["姓名", "年齡"];
        // 導出的表頭字段名
        const filterVal = ["name", "age"];
        let newList = []; 
    
    	//判斷有沒有選擇要導出的用戶信息
        if (this.selected.length === 0) {    //this.selected是table中v-model綁的值
          this.snackbar = true;
          this.titleTip = "未選擇用戶";
          this.color = "error";
          return false;
        }
        this.selected.map(item => {
          newList.push({
            name: item.name,
            age: item.age
          });
        });
        const data = formatJson(filterVal, newList);
        exportJsonToExcel(tHeader, data, "用戶信息");
      });
    }
    

  • 效果圖

vue中使用excel單個/批量導出表格數據大概就實現啦，下面貼一下上面用到的資料。👇👇👇

補充

• Blod.js

  (function (view) {
    "use strict";
  
    view.URL = view.URL || view.webkitURL;
  
    if (view.Blob && view.URL) {
      try {
        new Blob;
        return;
      } catch (e) {}
    }
  
    // Internally we use a BlobBuilder implementation to base Blob off of
    // in order to support older browsers that only have BlobBuilder
    var BlobBuilder = view.BlobBuilder || view.WebKitBlobBuilder || view.MozBlobBuilder || (function (view) {
      var
        get_class = function (object) {
          return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1];
        },
        FakeBlobBuilder = function BlobBuilder() {
          this.data = [];
        },
        FakeBlob = function Blob(data, type, encoding) {
          this.data = data;
          this.size = data.length;
          this.type = type;
          this.encoding = encoding;
        },
        FBB_proto = FakeBlobBuilder.prototype,
        FB_proto = FakeBlob.prototype,
        FileReaderSync = view.FileReaderSync,
        FileException = function (type) {
          this.code = this[this.name = type];
        },
        file_ex_codes = (
          "NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR " +
          "NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR"
        ).split(" "),
        file_ex_code = file_ex_codes.length,
        real_URL = view.URL || view.webkitURL || view,
        real_create_object_URL = real_URL.createObjectURL,
        real_revoke_object_URL = real_URL.revokeObjectURL,
        URL = real_URL,
        btoa = view.btoa,
        atob = view.atob
  
        ,
        ArrayBuffer = view.ArrayBuffer,
        Uint8Array = view.Uint8Array;
      FakeBlob.fake = FB_proto.fake = true;
      while (file_ex_code--) {
        FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;
      }
      if (!real_URL.createObjectURL) {
        URL = view.URL = {};
      }
      URL.createObjectURL = function (blob) {
        var
          type = blob.type,
          data_URI_header;
        if (type === null) {
          type = "application/octet-stream";
        }
        if (blob instanceof FakeBlob) {
          data_URI_header = "data:" + type;
          if (blob.encoding === "base64") {
            return data_URI_header + ";base64," + blob.data;
          } else if (blob.encoding === "URI") {
            return data_URI_header + "," + decodeURIComponent(blob.data);
          }
          if (btoa) {
            return data_URI_header + ";base64," + btoa(blob.data);
          } else {
            return data_URI_header + "," + encodeURIComponent(blob.data);
          }
        } else if (real_create_object_URL) {
          return real_create_object_URL.call(real_URL, blob);
        }
      };
      URL.revokeObjectURL = function (object_URL) {
        if (object_URL.substring(0, 5) !== "data:" && real_revoke_object_URL) {
          real_revoke_object_URL.call(real_URL, object_URL);
        }
      };
      FBB_proto.append = function (data /*, endings*/ ) {
        var bb = this.data;
        // decode data to a binary string
        if (Uint8Array && (data instanceof ArrayBuffer || data instanceof Uint8Array)) {
          var
            str = "",
            buf = new Uint8Array(data),
            i = 0,
            buf_len = buf.length;
          for (; i < buf_len; i++) {
            str += String.fromCharCode(buf[i]);
          }
          bb.push(str);
        } else if (get_class(data) === "Blob" || get_class(data) === "File") {
          if (FileReaderSync) {
            var fr = new FileReaderSync;
            bb.push(fr.readAsBinaryString(data));
          } else {
            // async FileReader won't work as BlobBuilder is sync
            throw new FileException("NOT_READABLE_ERR");
          }
        } else if (data instanceof FakeBlob) {
          if (data.encoding === "base64" && atob) {
            bb.push(atob(data.data));
          } else if (data.encoding === "URI") {
            bb.push(decodeURIComponent(data.data));
          } else if (data.encoding === "raw") {
            bb.push(data.data);
          }
        } else {
          if (typeof data !== "string") {
            data += ""; // convert unsupported types to strings
          }
          // decode UTF-16 to binary string
          bb.push(unescape(encodeURIComponent(data)));
        }
      };
      FBB_proto.getBlob = function (type) {
        if (!arguments.length) {
          type = null;
        }
        return new FakeBlob(this.data.join(""), type, "raw");
      };
      FBB_proto.toString = function () {
        return "[object BlobBuilder]";
      };
      FB_proto.slice = function (start, end, type) {
        var args = arguments.length;
        if (args < 3) {
          type = null;
        }
        return new FakeBlob(
          this.data.slice(start, args > 1 ? end : this.data.length), type, this.encoding
        );
      };
      FB_proto.toString = function () {
        return "[object Blob]";
      };
      FB_proto.close = function () {
        this.size = this.data.length = 0;
      };
      return FakeBlobBuilder;
    }(view));
  
    view.Blob = function Blob(blobParts, options) {
      var type = options ? (options.type || "") : "";
      var builder = new BlobBuilder();
      if (blobParts) {
        for (var i = 0, len = blobParts.length; i < len; i++) {
          builder.append(blobParts[i]);
        }
      }
      return builder.getBlob(type);
    };
  }(typeof self !== "undefined" && self || typeof window !== "undefined" && window || this.content || this));
  

• Export2Excel.js

  /* eslint-disable */
  require('script-loader!file-saver');
  require('./Blod');
  require('script-loader!xlsx/dist/xlsx.core.min');
  
  function generateArray(table) {
    var out = [];
    var rows = table.querySelectorAll('tr');
    var ranges = [];
    for (var R = 0; R < rows.length; ++R) {
      var outRow = [];
      var row = rows[R];
      var columns = row.querySelectorAll('td');
      for (var C = 0; C < columns.length; ++C) {
        var cell = columns[C];
        var colspan = cell.getAttribute('colspan');
        var rowspan = cell.getAttribute('rowspan');
        var cellValue = cell.innerText;
        if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue;
  
        //Skip ranges
        ranges.forEach(function (range) {
          if (R >= range.s.r && R <= range.e.r && outRow.length >= range.s.c && outRow.length <= range.e.c) {
            for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);
          }
        });
  
        //Handle Row Span
        if (rowspan || colspan) {
          rowspan = rowspan || 1;
          colspan = colspan || 1;
          ranges.push({
            s: {
              r: R,
              c: outRow.length
            },
            e: {
              r: R + rowspan - 1,
              c: outRow.length + colspan - 1
            }
          });
        };
  
        //Handle Value
        outRow.push(cellValue !== "" ? cellValue : null);
  
        //Handle Colspan
        if (colspan)
          for (var k = 0; k < colspan - 1; ++k) outRow.push(null);
      }
      out.push(outRow);
    }
    return [out, ranges];
  };
  
  function datenum(v, date1904) {
    if (date1904) v += 1462;
    var epoch = Date.parse(v);
    return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
  }
  
  function sheet_from_array_of_arrays(data, opts) {
    var ws = {};
    var range = {
      s: {
        c: 10000000,
        r: 10000000
      },
      e: {
        c: 0,
        r: 0
      }
    };
    for (var R = 0; R != data.length; ++R) {
      for (var C = 0; C != data[R].length; ++C) {
        if (range.s.r > R) range.s.r = R;
        if (range.s.c > C) range.s.c = C;
        if (range.e.r < R) range.e.r = R;
        if (range.e.c < C) range.e.c = C;
        var cell = {
          v: data[R][C]
        };
        if (cell.v == null) continue;
        var cell_ref = XLSX.utils.encode_cell({
          c: C,
          r: R
        });
  
        if (typeof cell.v === 'number') cell.t = 'n';
        else if (typeof cell.v === 'boolean') cell.t = 'b';
        else if (cell.v instanceof Date) {
          cell.t = 'n';
          cell.z = XLSX.SSF._table[14];
          cell.v = datenum(cell.v);
        } else cell.t = 's';
  
        ws[cell_ref] = cell;
      }
    }
    if (range.s.c < 10000000) ws['!ref'] = XLSX.utils.encode_range(range);
    return ws;
  }
  
  function Workbook() {
    if (!(this instanceof Workbook)) return new Workbook();
    this.SheetNames = [];
    this.Sheets = {};
  }
  
  function s2ab(s) {
    var buf = new ArrayBuffer(s.length);
    var view = new Uint8Array(buf);
    for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
    return buf;
  }
  
  export function export_table_to_excel(id) {
    var theTable = document.getElementById(id);
    console.log('a')
    var oo = generateArray(theTable);
    var ranges = oo[1];
  
    /* original data */
    var data = oo[0];
    var ws_name = "SheetJS";
    console.log(data);
  
    var wb = new Workbook(),
      ws = sheet_from_array_of_arrays(data);
  
    /* add ranges to worksheet */
    // ws['!cols'] = ['apple', 'banan'];
    ws['!merges'] = ranges;
  
    /* add worksheet to workbook */
    wb.SheetNames.push(ws_name);
    wb.Sheets[ws_name] = ws;
  
    var wbout = XLSX.write(wb, {
      bookType: 'xlsx',
      bookSST: false,
      type: 'binary'
    });
  
    saveAs(new Blob([s2ab(wbout)], {
      type: "application/octet-stream"
    }), "test.xlsx")
  }
  
  export function formatJson(filterVal, jsonData) {
    return jsonData.map(v => filterVal.map(j => {
      if (v[j]) {
        if (j === 'timestamp') {
          return parseTime(v[j])
        } else {
          return v[j]
        }
      } else {
        return ""
      }
    }))
  };
  export function exportJsonToExcel(th, jsonData, defaultTitle) {
  
    /* original data */
  
    var data = jsonData;
    data.unshift(th);
    var ws_name = "SheetJS";
  
    var wb = new Workbook(),
      ws = sheet_from_array_of_arrays(data);
  
  
    /* add worksheet to workbook */
    wb.SheetNames.push(ws_name);
    wb.Sheets[ws_name] = ws;
  
    var wbout = XLSX.write(wb, {
      bookType: 'xlsx',
      bookSST: false,
      type: 'binary'
    });
    var title = defaultTitle || '列表'
    saveAs(new Blob([s2ab(wbout)], {
      type: "application/octet-stream"
    }), title + ".xlsx")
  }