因為使用ajax匯出excel會出現問題，所以現在使用jquery.fileDownload.js外掛來解決匯出excel的問題

http://johnculviner.com/jquery-file-download-plugin-for-ajax-like-feature-rich-file-downloads/

在頁面引入jquery.fileDownload.js外掛

1、如下圖

<script type="text/javascript" src="${resource}/js/jquery.fileDownload.js"/></script>
<script type="text/javascript">

 $("#exportBtn").on("click",function(){
 $("#exportExcelModal").modal();  
 });
 $("#export_confirm").on("click",function(){
 var url="${path}/admin/information/student/export";
 $.fileDownload(url,{
data:{semesterId:$("#misSemester").val()},
successCallback: function (url) {
$("#exportExcelModal").modal("hide");
},
   failCallback: function (html, url) {
   alert("匯出失敗，未知的異常。");
   $("#exportExcelModal").modal("hide");
   }
});  
 });

2、如果要使回撥函式successCallback和failCallback起作用，還得在後臺程式碼中返回Cookie，如下圖

3、在後臺程式碼中設定Cookie，並返回Cookie的值

public void export(final HttpServletRequest request, HttpServletResponse response,final String semesterId) throws IOException, IllegalArgumentException, IllegalAccessException {
String fileName = "excel檔案";
response.reset();
response.setContentType("application/vnd.ms-excel;charset=utf-8");
response.setHeader("Content-Disposition", "attachment;filename=" + new String((fileName + ".xls").getBytes(), "iso-8859-1"));

        //在這裡加入設定Cookie   -------------
Cookie fileDownload=new Cookie("fileDownload", "true");
fileDownload.setPath("/");
response.addCookie(fileDownload);

      //------------------------------------
ServletOutputStream out = response.getOutputStream();
final HSSFWorkbook workbook = new HSSFWorkbook();
List<Future<Boolean>> resultList = new ArrayList<Future<Boolean>>();