title: when i write a GET orPOST method with params...then call it,if some params isn't filled in,the params will be set as null,right?
body: <p>when i write a GET or PUT method with params...then call it,if some params don't fill in,the params will be set as null,right?
  such as</p>
  
  <pre><code>@POST
      @Path("/create")
      @Consumes(MediaType.TEXT_PLAIN)
      @Produces(MediaType.TEXT_PLAIN)
      @Override
      public String create( @QueryParam("meg")String megString, @QueryParam("name")String nameString) {
         TestUser testUser=new TestUser();
         testUser.setMeg(megString);
         testUser.setName(nameString);
         em.persist(testUser);
         em.flush();
         return testUser.getId().toString();
  
      }
  </code></pre>
  
  <p>then i post the url www.XXX.com/create?meg="asdas"
  the param name is not filled in ,will the value be null when it called?
  thanks!</p>