title: Java mutlipart/formdata in `hash format` querying
body: <p>Ruby, PHP, Node, .NET, all can consume mutipart/formdata's hash format, e.g. (name => value):</p>
  
  <pre><code>user[name] =&gt; foo
  user[id] =&gt; 10
  user[account][id] = 10
  user[account][status] = true
  user[array][0] = 1
  user[array][1] = 2
  </code></pre>
  
  <p>for example in Rails I'd query it like:</p>
  
  <pre><code>params[:user] #=&gt; Hash {name: foo, id: 10}
  params[:user][:name] #=&gt; will return 10
  params[:user][:array] #=&gt; will return [1,2]
  </code></pre>
  
  <p>Is same achievable in Java (or maybe there's a library for this)?</p>
  
  <p>EDIT:
  To explain what I mean by the hash format:
  <a href="http://docs.cloudmailin.com/http_post_formats/multipart/#envelope" rel="nofollow noreferrer">link</a></p>