title: What is produce and consume in @Request Mapping
body: <p>I have the following line of code in my project.</p>
  
  <pre><code>@RequestMapping(value = UrlHandler.GET_AUTHENTICATION, 
      produces = {"application/json"}, 
      consumes = {"application/json"}, 
      method = RequestMethod.POST
  )
  </code></pre>
  
  <p>What is this <code>produces</code> and <code>consumes</code> meaning in the above lines. </p>