java - How to upload a File with hibernate-ogm and Mongodb? -

i have been able upload strings , dates mongodb, cannot figure out how file in there using webapp.

i'd rather not use gridfs, byte[] or blob (but if must use gridfs, then, must).

here have far:

index.jsp:

<form action="./fileuploadservlet" method="post">     <input type="text" name="subject"/><br>     <input type="date" name="docdate"/>     <%--todo: accept file db--%>     <input type="file" name="filecontent"/>      <input type="submit" value="submit"> </form> 

fileuploadservlet.java:

//imports...  @webservlet(name = "fileuploadservlet", urlpatterns = {"/fileuploadservlet"}) public class fileuploadservlet extends httpservlet {          throws servletexception, ioexception, exception {         response.setcontenttype("text/html;charset=utf-8");         printwriter out = response.getwriter();         try {             fileuploaddao fileuploaddao = new fileuploaddao();             fileuploadentity fileuploadentity = new fileuploadentity();  string subject = request.getparameter("subject");             string datestr = request.getparameter("docdate");             //todo: file contents             date date = new simpledateformat("yyyy-mm-dd").parse(datestr);             fileuploadentity.setsubject(subject);             fileuploadentity.setdocdate(date); //todo: set file contents             fileuploaddao.persistaction(fileuploadentity);             response.sendredirect("/jdc/index.jsp");         } {             out.close();         }     }  @override     protected void dopost(httpservletrequest request, httpservletresponse response)             throws servletexception, ioexception {         try {             processrequest(request, response);         } catch (exception ex) {             logger.getlogger(fileuploadservlet.class.getname()).log(level.severe, null, ex);         }     } } 

how file in there? tried

request.getparameter("filecontent"); request.getattribute("filecontent"); 

but did not work.

i able upload binary data database, i'm not sure how retrieve it. here have though:

add these lines processrequest method:

byte[] b = request.getparameter("filecontent").getbytes();   fileuploadentity.setfilecontent(b);