报表增加导出功能

jshERP-web/src/utils/util.js

@@ -1,6 +1,6 @@
 import * as api from '@/api/api'
 import { isURL } from '@/utils/validate'
-import Vue from 'vue'
+import XLSX from 'xlsx'
 
 export function timeFix() {
   const time = new Date()
@@ -540,6 +540,35 @@ export function getNowFormatDateTime() {
   return currentdate;
 }
 
+/**
+ * js获取当前时间， 格式“MMddHHMMSS”
+ */
+export function getNowFormatStr() {
+  var date = new Date();
+  var month = date.getMonth() + 1;
+  var strDate = date.getDate();
+  var strHours = date.getHours();
+  var strMinutes = date.getMinutes();
+  var strSeconds = date.getSeconds();
+  if (month >= 1 && month <= 9) {
+    month = "0" + month;
+  }
+  if (strDate >= 0 && strDate <= 9) {
+    strDate = "0" + strDate;
+  }
+  if (strHours >= 0 && strHours <= 9) {
+    strHours = "0" + strHours;
+  }
+  if (strMinutes >= 0 && strMinutes <= 9) {
+    strMinutes = "0" + strMinutes;
+  }
+  if (strSeconds >= 0 && strSeconds <= 9) {
+    strSeconds = "0" + strSeconds;
+  }
+  var currentdate = month + strDate + strHours + strMinutes + strSeconds;
+  return currentdate;
+}
+
 /**
  * JS中根据指定值删除数组中的元素
  * @param arrylist
@@ -570,4 +599,58 @@ export function changeListFmtMinus(arr) {
     }
   }
   return newArr;
+}
+
+/**
+ 通用的打开下载对话框方法，没有测试过具体兼容性
+ @param url 下载地址，也可以是一个blob对象，必选
+ @param saveName 保存文件名，可选
+ */
+export function openDownloadDialog (url, saveName) {
+  if (typeof url === 'object' && url instanceof Blob) {
+    url = URL.createObjectURL(url) // 创建blob地址
+  }
+  let aLink = document.createElement('a')
+  aLink.href = url
+  saveName = saveName + '_' + getNowFormatStr() + '.xlsx'
+  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
+  let 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)
+}
+
+/**
+ * 将一个sheet转成最终的excel文件的blob对象，然后利用URL.createObjectURL下载
+ * @param sheet
+ * @param sheetName
+ * @returns {Blob}
+ */
+export function sheet2blob (aoa, sheetName) {
+  let sheet = XLSX.utils.aoa_to_sheet(aoa)
+  sheetName = sheetName || 'sheet1'
+  let workbook = {
+    SheetNames: [sheetName],
+    Sheets: {}
+  }
+  workbook.Sheets[sheetName] = sheet
+  // 生成excel的配置项
+  let 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'
+  }
+  let wbout = XLSX.write(workbook, wopts)
+  let blob = new Blob([s2ab(wbout)], { type: 'application/octet-stream' })
+  // 字符串转ArrayBuffer
+  function s2ab (s) {
+    let buf = new ArrayBuffer(s.length)
+    let view = new Uint8Array(buf)
+    for (let i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF
+    return buf
+  }
+  return blob
 }