title: 'no multipart boundary was found' exception while uploading file using jQuery Ajax
body: <p>Here is my jQuery Snippet</p>
  
  <pre><code>$("#uploadForm").submit(function (e) {
      $.ajax({
          url: 'uploadExcel',
          data: $('#uploadForm').serialize(),
          cache: false,
          contentType: 'multipart/form-data',
          processData: false,
          type: 'POST',
          success: function (data) {
              alert(data);
          }
      });
  </code></pre>
  
  <p>while uploading the file i get the following error</p>
  
  <pre><code>org.apache.commons.fileupload.FileUploadException: the request was rejected because no multipart boundary was found
      at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.&lt;init&gt;(FileUploadBase.java:931)
      at org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:331)
      at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:349)
      at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:126)
      at com.obs.controller.ExcelUploadController.doPost(ExcelUploadController.java:36)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
  </code></pre>
  
  <p>What is the reason ?  How it can be overcome ?</p>