第一次用这个软件,怎么导出Excel。网上找的一个方法有点不会用。

Question

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));

这是Export2Excel.js

/* eslint-disable */
require('script-loader!file-saver');
require('script-loader!@/wlw/src/ExportFile');//这里是文件路径
import XLSX from 'xlsx/types'

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);
  var oo = generateArray(theTable);
  var ranges = oo[1];

  /* original data */
  var data = oo[0];
  var ws_name = "SheetJS";

  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 export_json_to_excel(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);

  /*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
      };
    }
  }))
  /*以第一行为初始值*/
  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 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")
}

Answer 1

1. 有个简单的案例：
   
   js 实现json导出excel表格_js jsonexcel_美酒没故事°的博客-CSDN博客 安装xlsx插件_js jsonexcel https://blog.csdn.net/qq_42618566/article/details/107253501

2. 或者

<!doctype html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport"
            content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        <script src="https://unpkg.com/xlsx/dist/xlsx.full.min.js"></script>
        <title>json to excel</title>
    </head>
    <body>
        <button onclick="toExcel()">导出</button>
 
        <script>
            function toExcel() {
                const excel = XLSX.utils.book_new();
                const demo = [{
                        "IMEI(设备编号)": "86482351421321111",
                        设备名称: "饭少吃",
                        设备类型: "空开",
                        设备型号: "ML-200",
                        NB卡号: "32113213",
                        批次号: "11113333111",
                        出厂编号: "4213231231215431",
                        出厂日期是发哈是开放的粉红色: "2020-01-22 12:44:10",
                        产品标识: "7665323144642124",
                        设备密钥: "cc76w454321a2674j3g65",
                    },
                    {
                        "IMEI(设备编号)": "86482351422131231321111",
                        设备名称: "上点饭",
                        设备类型: "电能表",
                        设备型号: "ML-2100",
                        NB卡号: "323213",
                        批次号: "111133763433444441153531",
                        出厂编号: "215431",
                        出厂日期是发哈是开放的粉红色: "2020-01-22 12:44:10",
                        产品标识: "7665323144642124",
                        设备密钥: "cc76w45432142312312312312312312a2674j3g65",
                    },
                    {
                        "IMEI(设备编号)": "1231321111",
                        设备名称: "粉丝地方撒",
                        设备类型: "空开",
                        设备型号: "ML-200",
                        NB卡号: "3213213213",
                        批次号: "1111333344444111",
                        出厂编号: "21543881",
                        出厂日期是发哈是开放的粉红色: "2020-01-22 12:44:10",
                        产品标识: "766534642124",
                        设备密钥: "cc76w45432142312312312a2674j3g65",
                    },
                ];
 
                let data = XLSX.utils.json_to_sheet(demo, {
                    // origin: "A2", // 设置插入位置
                });
                // 表头的样式
                data["A1"].s = {
                    font: {
                        bold: true,
                    },
                    alignment: {
                        horizontal: "center",
                        vertical: "center",
                    },
                };
 
 
 
                // 合并单元格     s: 起始位置,   e: 结束位置,   r: 行,   c: 列
                // data["!merges"] = [{ s: { r: 0, c: 0 }, e: { r: 0, c: 10 } }];
                //  设置列宽
                // data["!cols"] = [{ wch: 50 }, { wch: 20 }, { wch: 40 }];
 
                // 1.所有表头的宽度
                const headsWidth = Object.keys(demo[0]).map((value) => {
                    if (/.*[\u4e00-\u9fa5]+.*$/.test(value)) {
                        return parseFloat(value.toString().length * 2.1);
                    } else {
                        return parseFloat(value.toString().length * 1.1)
                    }
                });
                // console.log("所有表头的宽度：", headsWidth);
 
                // 2.所有表体值的宽度
                const rowsWidth = demo.map((item) => {
                    // 每行数据中值的宽度
                    const maxValue = Object.values(item).map((value, index) => {
                        let valueWidth;
                        if (/.*[\u4e00-\u9fa5]+.*$/.test(value)) {
                            valueWidth = parseFloat(value.toString().length * 2.1);
                        } else {
                            valueWidth = parseFloat(value.toString().length * 1.1);
                        }
                        // console.log("每行数据中值的宽度：", valueWidth);
 
                        // 对比出表头和表体值的最大数
                        return Math.max(valueWidth, headsWidth[index]);
                    });
                    // console.log("本行值中最大宽度：", maxValue);
                    return maxValue;
                })
                // console.log("每行数据对比出的最大宽度：", rowsWidth);
 
                // 3.对比每列最大值
                let aotuWidth = []
                rowsWidth.map((row, index) => {
                    let maxWidth = [];
                    row.map((value, i) => {
                        if (index === 0) {
                            maxWidth.push({
                                wch: value
                            });
                        } else {
                            maxWidth.push({
                                wch: Math.max(value, aotuWidth[i].wch)
                            })
                        }
                    })
                    console.log("最大值：", maxWidth);
                    aotuWidth = maxWidth;
                });
                // console.log("每列最大宽度：", aotuWidth);
 
                // 4.给excel设置自适应宽度
                data["!cols"] = aotuWidth;
 
 
 
 
 
                XLSX.utils.book_append_sheet(excel, data);
                XLSX.writeFile(excel, "空开填写模板.xlsx");
            }
        </script>
    </body>
</html>