Take a look at my library, internally use Specifications. It might be right for you. Through this library your controller will be able to receive requests like this:

curl -X GET \
  'https://myexampledomain.com/persons?
  firstName=Biagio
  &lastName_startsWith=Toz
  &birthDate_gte=19910101
  &country_in=IT,FR,DE
  &address_eq=Via Roma 1,Via Milano/,1,20 West/,34th Street
  &company.name_in=Microsoft,Apple,Google
  &company.employees_between=500,5000'

or:

curl -X POST -H "Content-type: application/json" -d '{   "filter" : {
      "operator": "and", // the first filter must contain a root operator: AND, OR or NOT
      "filters" : [
        {
          "operator": "eq",
          "key": "firstName",
          "value": "Biagio"
        },
        {
          "operator": "or",
          "filters": [
            {
              "operator": "startsWith",
              "key": "lastName",
              "value": "Toz",
              "options": {
                "ignoreCase": true
              }
            },
            {
              "operator": "endsWith",
              "key": "lastName",
              "value": "ZZI",
              "options": {
                "ignoreCase": true,
                "trim" : true
              }
            }
          ]
        },
        {
          "operator": "in",
          "key": "company.name",
          "values": ["Microsoft", "Apple", "Google"]
        },
        {
          "operator": "or",
          "filters": [
            {
              "operator": "gte",
              "key": "birthDate",
              "value": "19910101"
            },
            {
              "operator": "lte",
              "key": "birthDate",
              "value": "20010101"
            }
          ]
        },
        {
          "operator": "between",
          "key" : "company.employees",
          "values": [500, 5000],
          "options": {
            "negate": true
          }
        }
      ]   },   "options": {
    "pageSize": 10,
    "pageOffset": 0,
    "sortKey": "birthDate",
    "sortDesc": false   }    }' 'https://myexampledomain.com/persons'