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							- // 将一个sheet转成最终的excel文件的blob对象,然后利用URL.createObjectURL下载
 
- function sheet2blob(sheet, sheetName) {
 
-     sheetName = sheetName || 'sheet1';
 
-     var workbook = {
 
-         SheetNames: [sheetName],
 
-         Sheets: {}
 
-     };
 
-     workbook.Sheets[sheetName] = sheet; // 生成excel的配置项
 
-     var wopts = {
 
-         bookType: 'xlsx', // 要生成的文件类型
 
-         bookSST: false, // 是否生成Shared String Table,官方解释是,如果开启生成速度会下降,但在低版本IOS设备上有更好的兼容性
 
-         type: 'binary'
 
-     };
 
-     var wbout = XLSX.write(workbook, wopts);
 
-     var blob = window.URL.createObjectURL(new Blob([s2ab(wbout)], {
 
-         type: "application/octet-stream"
 
-     }))
 
-     
 
-     // new Blob([s2ab(wbout)], {
 
-     //     type: "application/octet-stream"
 
-     // }); // 字符串转ArrayBuffer
 
-     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;
 
-     }
 
-     return blob;
 
- }
 
- function openDownloadDialog(url, saveName) {
 
-     if (typeof url == 'object' && url instanceof Blob) {
 
-         url = URL.createObjectURL(url); // 创建blob地址
 
-     }
 
-     var aLink = document.createElement('a');
 
-     aLink.href = url;
 
-     aLink.download = saveName || ''; // HTML5新增的属性,指定保存文件名,可以不要后缀,注意,file:///模式下不会生效
 
-     var event;
 
-     if (window.MouseEvent) event = new MouseEvent('click');
 
-     else {
 
-         event = document.createEvent('MouseEvents');
 
-         event.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
 
-     }
 
-     aLink.dispatchEvent(event);
 
- }
 
 
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