excel转数据

最近找了个vue的Excel数据读取的案例，初次创作，勿喷

安装依赖

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

引入js文件

  import blob from \'./../excel/Blob\'
  import ex from \'./../excel/Export2Excel\'

添加HTML标签

    <input id=\"upload\" type=\"file\" @change=\"importfxx(this)\" accept=\".csv, application/vnd.open formats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel\" />

添加转换函数

methods:{
          importfxx(obj) {
        // npm install -D  -loader
        // npm install -S file-saver xlsx
        // import blob from \'./../excel/Blob\'
        // import ex from \'./../excel/Export2Excel\'
        // <input id=\"upload\" type=\"file\" @change=\"importfxx(this)\" accept=\".csv, application/vnd.open formats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel\" />

        let _this = this;
        this.file = event.currentTarget.files[0];// 通过DOM取文件数据
        var rABS = false; //是否将文件读取为二进制字符串
        var f = this.file;

        var reader = new FileReader();
        //if (!FileReader.prototype.readAsBinaryString) {
        FileReader.prototype.readAsBinaryString = function(f) {
          var binary = \"\";
          var rABS = false; //是否将文件读取为二进制字符串
          var pt = this;
          var wb; //读取完成的数据
          var outdata;
          var reader = new FileReader();
          reader.  = function(e) {
            var bytes = new Uint8Array(reader.result);
            var length = bytes.byteLength;
            for (var i = 0; i < length; i++) {
              binary += String.fromCharCode(bytes[i]);
            }
            var XLSX = require(\"xlsx\");
            if (rABS) {
              wb = XLSX.read(btoa(fixdata(binary)), {
                //手动转化
                type: \" 64\"
              });
            } else {
              wb = XLSX.read(binary, {
                type: \"binary\"
              });
            }
            outdata = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]); //outdata就是你想要的东西
            console.log(outdata)
          };
          reader.readAsArrayBuffer(f);
        };
        if (rABS) {
          reader.readAsArrayBuffer(f);
        } else {
          reader.readAsBinaryString(f);
        }
      },

}

blob.js文件代码如下

(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   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( ) {
                    return  .prototype.toString.call( ).match(/^\\[ \\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_ _URL = real_URL.create URL
                , real_revoke_ _URL = real_URL.revoke URL
                , 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.create URL) {
                URL = view.URL = {};
            }
            URL.create URL = 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 === \" 64\") {
                        return data_URI_header + \"; 64,\" + blob.data;
                    } else if (blob.encoding === \"URI\") {
                        return data_URI_header + \",\" + decodeURIComponent(blob.data);
                    } if (btoa) {
                        return data_URI_header + \"; 64,\" + btoa(blob.data);
                    } else {
                        return data_URI_header + \",\" + encodeURIComponent(blob.data);
                    }
                } else if (real_create_ _URL) {
                    return real_create_ _URL.call(real_URL, blob);
                }
            };
            URL.revoke URL = function( _URL) {
                if ( _URL.substring(0, 5) !== \"data:\" && real_revoke_ _URL) {
                    real_revoke_ _URL.call(real_URL,  _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 === \" 64\" && 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 \"[  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 \"[  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代码如下

require(\' -loader!file-saver\');
require(\'./Blob\');
require(\' -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\")
}

function formatJson(jsonData) {
    console.log(jsonData)
}
export function export_json_to_excel(th, jsonData, default ) {

    /* 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   = default  || \'列表\'
    saveAs(new Blob([s2ab(wbout)], {type: \"application/octet-stream\"}),   + \".xlsx\")
}

效果图如下

Excel文件：

选择Excel文件

转换结果：