js實現Excel檔案匯入匯出、利用 js-xlsx 實現 Excel 檔案匯入匯出-功能示例
阿新 • • 發佈：2018-12-29
1.匯入功能實現
下載js-xlsx到dist複製出xlsx.full.min.js引入到頁面中 然後通過FileReader物件讀取檔案利用js-xlsx轉成json資料
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <script src="http://oss.sheetjs.com/js-xlsx/xlsx.full.min.js"></script> </head> <body> <input type="file"onchange="importf(this)" /> <div id="demo"></div> <script> /* FileReader共有4種讀取方法： 1.readAsArrayBuffer(file)：將檔案讀取為ArrayBuffer。 2.readAsBinaryString(file)：將檔案讀取為二進位制字串 3.readAsDataURL(file)：將檔案讀取為Data URL 4.readAsText(file, [encoding])：將檔案讀取為文字，encoding預設值為'UTF-8' */ var wb;//讀取完成的資料 var rABS = false; //是否將檔案讀取為二進位制字串 function importf(obj) {//匯入 if(!obj.files) { return; } var f = obj.files[0]; var reader = new FileReader(); reader.onload = function(e) { var data = e.target.result; if(rABS) { wb = XLSX.read(btoa(fixdata(data)), {//手動轉化 type: 'base64' }); } else { wb = XLSX.read(data, { type: 'binary' }); } //wb.SheetNames[0]是獲取Sheets中第一個Sheet的名字 //wb.Sheets[Sheet名]獲取第一個Sheet的資料 document.getElementById("demo").innerHTML= JSON.stringify( XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]) ); }; if(rABS) { reader.readAsArrayBuffer(f); } else { reader.readAsBinaryString(f); } } function fixdata(data) { //檔案流轉BinaryString var o = "", l = 0, w = 10240; for(; l < data.byteLength / w; ++l) o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w, l * w + w))); o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w))); return o; } </script> </body> </html>
2.匯出功能的實現
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <script src="http://oss.sheetjs.com/js-xlsx/xlsx.full.min.js"></script> </head> <body> <button onclick="downloadExl(jsono)">匯出</button> <!-- 以下a標籤不需要內容 --> <a href="" download="這裡是下載的檔名.xlsx" id="hf"></a> <script> var jsono = [{ //測試資料 "保質期臨期預警(天)": "adventLifecycle", "商品標題": "title", "建議零售價": "defaultPrice", "高(cm)": "height", "商品描述": "Description", "保質期禁售(天)": "lockupLifecycle", "商品名稱": "skuName", "商品簡介": "brief", "寬(cm)": "width", "阿達": "asdz", "貨號": "goodsNo", "商品條碼": "skuNo", "商品品牌": "brand", "淨容積(cm^3)": "netVolume", "是否保質期管理": "isShelfLifeMgmt", "是否串號管理": "isSNMgmt", "商品顏色": "color", "尺碼": "size", "是否批次管理": "isBatchMgmt", "商品編號": "skuCode", "商品簡稱": "shortName", "毛重(g)": "grossWeight", "長(cm)": "length", "英文名稱": "englishName", "淨重(g)": "netWeight", "商品分類": "categoryId", "這裡超過了": 1111.0, "保質期(天)": "expDate" }]; var tmpDown; //匯出的二進位制物件 function downloadExl(json, type) { var tmpdata = json[0]; json.unshift({}); var keyMap = []; //獲取keys for (var k in tmpdata) { keyMap.push(k); json[0][k] = k; } var tmpdata = [];//用來儲存轉換好的json json.map((v, i) => keyMap.map((k, j) => Object.assign({}, { v: v[k], position: (j > 25 ? getCharCol(j) : String.fromCharCode(65 + j)) + (i + 1) }))).reduce((prev, next) => prev.concat(next)).forEach((v, i) => tmpdata[v.position] = { v: v.v }); var outputPos = Object.keys(tmpdata); //設定區域,比如表格從A1到D10 var tmpWB = { SheetNames: ['mySheet'], //儲存的表標題 Sheets: { 'mySheet': Object.assign({}, tmpdata, //內容 { '!ref': outputPos[0] + ':' + outputPos[outputPos.length - 1] //設定填充區域 }) } }; tmpDown = new Blob([s2ab(XLSX.write(tmpWB, {bookType: (type == undefined ? 'xlsx':type),bookSST: false, type: 'binary'}//這裡的資料是用來定義匯出的格式型別 ))], { type: "" }); //建立二進位制物件寫入轉換好的位元組流 var href = URL.createObjectURL(tmpDown); //建立物件超連結 document.getElementById("hf").href = href; //繫結a標籤 document.getElementById("hf").click(); //模擬點選實現下載 setTimeout(function() { //延時釋放 URL.revokeObjectURL(tmpDown); //用URL.revokeObjectURL()來釋放這個object URL }, 100); } function s2ab(s) { //字串轉字元流 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; } // 將指定的自然數轉換為26進製表示。對映關係：[0-25] -> [A-Z]。 function getCharCol(n) { let temCol = '', s = '', m = 0 while (n > 0) { m = n % 26 + 1 s = String.fromCharCode(m + 64) + s n = (n - m) / 26 } return s } </script> </body> </html>