再考虑远些，甚至还可以给表格头部手动添加一些排序链接，通过传递排序表格的相应参数，让它们能刷新页面。
Taking it a step further, you could even add the sorting links into the table headers manually and have them refresh the page, passing variables to re-sort the table accordingly.
Content-disposition 头部告诉浏览器该电子表格应该被存储为文件，并推荐一个名称，本例中是 pivot.xml。
The Content-disposition header tells the browser that this spreadsheet should be stored as a file and recommends a name, in this case pivot.xml.
Content - type头部告诉浏览器，脚本在导出一个Excel电子表格。
The Content-type header tells the browser that the script is exporting an Excel spreadsheet.
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