vue+element导出excel并通过xlsx-style修改样式

导入插件

npm install --save xlsx
npm install -S file-saver
npm install -D script-loader
npm install --save xlsx-style(修改表格样式要下载)
或者
cnpm install --save xlsx file-saver
npm install --save xlsx-style(修改表格样式要下载)

我上面的失败了 于是用了下面的这种

（如果安装了npm install --save xlsx-style会报错:
This relative module was not found: ./cptable in/node_modules/[email protected]@xlsx-style/dist/cpexcel.js）

可以直接修改源代码:
在\node_modules\xlsx-style\dist\cpexcel.js 807行；
将var cpt = require(’./cpt’ + ‘able’);
改成var cpt = cptable;

创建js文件

Blob.js

/* eslint-disable */
/*  Blob.js
 * A Blob implementation.
 * 2014-05-27
 *
 * By Eli Grey, http://eligrey.com
 * By Devin Samarin, https://github.com/eboyjr
 * License: X11/MIT
 *   See LICENSE.md
 */

/*global self, unescape */
/*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,
 plusplus: true */

/*! @source http://purl.eligrey.com/github/Blob.js/blob/master/Blob.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

//Export2Excel.js
/* eslint-disable */
require('script-loader!file-saver');
require('./Blob.js');//转二进制用  这边要写你的blob的实际地址
require('script-loader!xlsx/dist/xlsx.core.min');
import XLSX from 'xlsx-style'
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")
}

function formatJson (jsonData) {
  console.log(jsonData)
}
export function export_json_to_excel ({
  title,//标题
  multiHeader = [],
  header,//表头 格式:[[],[]]多级菜单，从下往上
  data,//格式后的数据
  filename,//表名
  merges = [],//需要合并的单元格 格式:[[],[]]
  autoWidth = true,
  bookType = 'xlsx'
} = {}) {
  /* original data */
  //判断是否有表名、没有则赋予固定表名
  filename = filename || 'excel-list'
  //获取所有数据
  data = [...data]
  //添加表头进数据最上层
  header.forEach(element => {
    data.unshift(element);
  });
  //添加标题进数据最上层  在表头之上
  data.unshift(title);
  //判断multiHeader是否有值(原作为标题后修改的值)
  for (let i = multiHeader.length - 1; i > -1; i--) {
    data.unshift(multiHeader[i])
  }

  var ws_name = "SheetJS";
  var wb = new Workbook(),
    //将data转化格式 用于接下来动态宽度
    ws = sheet_from_array_of_arrays(data);

  //合并单元格
  if (merges.length > 0) {
    if (!ws['!merges']) ws['!merges'] = [];
    merges.forEach(a => {
      a.forEach(item => {
        ws['!merges'].push(XLSX.utils.decode_range(item))
      })
    })
  }
  //动态设置宽度
  if (autoWidth) {
    /*设置worksheet每列的最大宽度*/
    const colWidth = data.map(row => row.map(val => {
      /*先判断是否为null/undefined*/
      if (val == null) {
        return {
          'wch': 10
        };
      }
      /*再判断是否为中文*/
      else if (val.toString().charCodeAt(0) > 255) {
        return {
          'wch': val.toString().length * 2
        };
      } else {
        return {
          'wch': val.toString().length
        };
      }
    }))
    //判断合并单元格中是否有同行合并，有则将其长度设为0
    if (merges.length > 0) {
      if (!ws['!merges']) ws['!merges'] = [];
      merges.forEach(a => {
        a.forEach(item => {
          let q = item.split(':')
          let w1 = q[0].substring(0, 1)
          let e1 = q[0].substring(1, 2)
          let w2 = q[1].substring(0, 1)
          let e2 = q[1].substring(1, 2)
          if (e1 == e2) {
            let abc = {
              "A": 0, "B": 1, "C": 2, "D": 3, "E": 4, "F": 5, "G": 6, "H": 7, "I": 8, "J": 9,
              "K": 10, "L": 11, "M": 12, "N": 13, "O": 14, "P": 15, "Q": 16, "R": 17, "S": 18, "T": 19, "U": 20,
              "V": 21, "W": 22, "X": 23, "Y": 24, "Z": 25
            };
            if (abc[w1] > abc[w2]) {
              let jh = w1
              w1 = w2
              w2 = jh
            }
            for (let i = abc[w1]; i <= abc[w2]; i++) {
              colWidth[e1 - 1][i]['wch'] = 0;
            }
          }
        })
      })
    }
    /*以第一行为初始值 判断对应每一列的最大长度*/
    let result = colWidth[0];
    for (let i = 1; i < colWidth.length; i++) {
      for (let j = 0; j < colWidth[i].length; j++) {
        if (result[j]['wch'] < colWidth[i][j]['wch']) {
          result[j]['wch'] = colWidth[i][j]['wch'];
        }
      }
    }
    ws['!cols'] = result;
  }

  /* add worksheet to workbook */
  wb.SheetNames.push(ws_name);
  wb.Sheets[ws_name] = ws;
  var dataInfo = wb.Sheets[wb.SheetNames[0]];

  const borderAll = {  //单元格外侧框线
    top: {
      style: 'thin'
    },
    bottom: {
      style: 'thin'
    },
    left: {
      style: 'thin'
    },
    right: {
      style: 'thin'
    }
  };
  //给所以单元格加上边框
  for (var i in dataInfo) {
    if (i == '!ref' || i == '!merges' || i == '!cols' || i == 'A1') {

    } else {
      dataInfo[i + ''].s = {
        border: borderAll,
        //居中属性
        alignment: {
          horizontal: "center",
          vertical: "center"
        },
      }
    }
  }

  // 去掉标题边框
  let arr = ["A1", "B1", "C1", "D1", "E1", "F1", "G1", "H1", "I1", "J1", "K1", "L1", "M1", "N1", "O1", "P1", "Q1", "R1", "S1", "T1", "U1", "V1", "W1", "X1", "Y1", "Z1"];
  arr.some(function (v) {
    // let a = merges[0].split(':')
    let a = merges[0][0].split(':')
    if (v == a[1]) {
      dataInfo[v].s = {}
      return true;
    } else {
      dataInfo[v].s = {}
    }
  })

  //设置主标题样式
  dataInfo["A1"].s = {
    font: {
      name: '宋体',
      sz: 18,
      color: { rgb: "ff0000" },
      bold: true,
      italic: false,
      underline: false
    },
    alignment: {
      horizontal: "center",
      vertical: "center"
    },
    // fill: {
    //   fgColor: {rgb: "008000"},
    // },
  };

  // console.log(merges)
  // console.log(dataInfo)


  var wbout = XLSX.write(wb, {
    bookType: bookType,
    bookSST: false,
    type: 'binary'
  });
  saveAs(new Blob([s2ab(wbout)], {
    type: "application/octet-stream"
  }), `${filename}.${bookType}`);
};

导出方法

exportExcel () {
      require.ensure([], () => {
        const { export_json_to_excel } = require('../excel/Export2Excel');//注意这个Export2Excel路径
        const tHeader = [['拌合机名称', '录入时间', '材料名称', '使用部位', "0.075", "0.15", "0.3",
          "0.6", "1.18", "2.36", "4.75", "9.5", "13.2", "16", "19", "26.5", "31.5", "37.5", "53"],
        ['拌合机名称', '录入时间', '材料名称', '使用部位', "筛孔通过率", "0.15", "0.3",
          "0.6", "1.18", "2.36", "4.75", "9.5", "13.2", "16", "19", "26.5", "31.5", "37.5", "53"]];
        // 上面设置Excel的表格第一行的标题 格式为[[],[]]单行就输入[[]]
        const title = ['沥青筛分实验录入', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
          '', '', '', '']//标题 长度要标题长度一致
        const filterVal = ['bhjmc', 'lrsj', 'clmc', 'sgbw', 'sktgl-0', 'sktgl-1', 'sktgl-2',
          'sktgl-3', 'sktgl-4', 'sktgl-5', 'sktgl-6', 'sktgl-7', 'sktgl-8', 'sktgl-9',
          'sktgl-10', 'sktgl-11', 'sktgl-12', 'sktgl-13', 'sktgl-14']; // tableData里对象的属性key值 就是对应的属性名
        const list = this.tableData;  //把要导出的数据tableData存到list
        const data = this.formatJson(filterVal, list);
        data.map(item => {
          // console.log(item)
          item.map((i, index) => {
            if (!i) {
              item[index] = ''
            }
          })
        })
        const merges = [["A1:S1"], ["E2:S2"], ["A2:A3"], ["B2:B3"], ["C2:C3"], ["D2:D3"]] //合并单元格 格式[[],[]]
        export_json_to_excel({
          title: title,
          header: tHeader,
          data,
          merges,
          filename: '筛分录入',
          autoWidth: true,
          bookType: 'xlsx'
        });
      })
    },
    formatJson (filterVal, jsonData) {
      return jsonData.map(v => filterVal.map(j => v[j]))
    },

excel表

借鉴https://www.cnblogs.com/yinxingen/p/11052184.html