jquery fileupload ie9 notworking, jsp & java

javascript

$("input[name=attachFile]").fileupload({

url : '<c:url value="/myurl.do"/>',
datatype : 'json',
formData : {
k1 : "k1",
atchFileId : $("#atchFileId").val(),
fileType : fileType
},
done : function(e, data){
var def = data.result[0].body.innerHTML;
var dt = jQuery.parseJSON(def);
if(dt.message == 'success'){
alert('파일 업로드가 완료되었습니다.');
}else{
alert('파일 업로드가 실패하였습니다.\n관리자에게 문의해주세요.');
}
}
}).prop('disabled', !$.support.fileInput).parent().addClass($.support.fileInput ? undefined : 'disabled');

java 

@RequestMapping(value = "/myurl.do")
public void abc(MultipartHttpServletRequest request, HttpServletResponse response) throws IOException{

~

Map rtn= new HashMap<String, String>();

response.setContentType("text/html;charset=UTF-8");
response.setCharacterEncoding("UTF-8");
response.setHeader("Cache-Control", "no-chche");
response.setHeader("Content-type", "text/html");
response.setHeader("charset", "UTF-8");

PrintWriter outWriter=null;
Gson gson = new Gson();
outWriter = response.getWriter();
outWriter.print(gson.toJson(rtn));
outWriter.flush();

}