title: Method returning JSON "empty:false" although this JSON has data
body: <p>I have java Spring Boot application. In console json have data in(but in wrong order?) and when i'm converting it to String i can get it, but JSONObject cannot be returned, POSTman showing {"empty":false}</p>
  
  <p>My controller
      package com.example.controller;</p>
  
  <pre><code>import java.util.List;
  
  import javax.servlet.http.HttpServletRequest;
  
  import org.json.JSONException;
  import org.json.JSONObject;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.RestController;
  
  import com.example.dao.SeriaDao;
  import com.example.model.Seria;
  
  
  @RestController
  public class WebController {
  
      @Autowired
      SeriaDao sed;
  
  
      @GetMapping("/tabelka")
      public List&lt;Seria&gt; showTable()
      {
          return sed.findAll();
      }
  
      @GetMapping("/pgTabelka")
      public JSONObject pgTable(HttpServletRequest request)
      {
          int draw = 0;
          int start = 0;
          int length = 10;
  
          JSONObject json = new JSONObject();
          if(request.getParameter("draw")!=null)
              draw = Integer.parseInt(request.getParameter("draw"));
          if(request.getParameter("start")!=null)
              start = Integer.parseInt(request.getParameter("start"));
          if(request.getParameter("length")!=null)
              length = Integer.parseInt(request.getParameter("length"));
          int totalRecords = sed.recordsTotal();
  
          List&lt;Seria&gt; serie = sed.findPart(start, length);
  
          try {
              json.put("draw", ++draw);
              json.put("recordsTotal", totalRecords);
              json.put("recordsFiltered", totalRecords);
              json.put("data", serie);
          } catch (JSONException e) {
              e.printStackTrace();
          }
          System.out.println(json);
  
          return json;
      }
  }
  </code></pre>
  
  <p>What i have to add and why i can't get json like i'm trying to get?</p>
  
  <p>PS. json returned in console:</p>
  
  <pre><code>{
    "recordsFiltered": 488,
    "data": [
      {
        "feed": "Macroeconomic_And_Major_Markets",
        "unit": "$ per Week",
        "file": "SMU48185800500000011.csv",
        "cassid": "1d2e556b-031e-4c6f-aec4-981c4e907324",
        "name": "Average Weekly Earnings of All Employees: Total Private in Corpus Christi, TX (MSA)",
        "createdate": "2016-10-15T23:38:49",
        "changedate": "2017-01-09T00:50:01",
        "id": 41,
        "datefrom": "2006-12-31",
        "categoryid": 3,
        "frequency": 5
      },
      {
        "feed": "Macroeconomic_And_Major_Markets",
        "unit": "Index 2015=100",
        "file": "CP0910CYM086NEST.csv",
        "cassid": "6df5b8d5-ec39-4860-930f-a8b355cce37a",
        "name": "Harmonized Index of Consumer Prices: Audio-Visual, Photographic, and Information Processing Equipment for Cyprus",
        "createdate": "2016-10-15T23:38:49",
        "changedate": "2017-02-16T11:35:04",
        "id": 42,
        "datefrom": "1995-12-31",
        "categoryid": 3,
        "frequency": 5
      },
      {
        "feed": "Macroeconomic_And_Major_Markets",
        "unit": "$ per Week",
        "file": "SMU48185800500000011A.csv",
        "cassid": "c3bad2a6-7ad5-4091-846b-f84e9b9f7b50",
        "name": "Average Weekly Earnings of All Employees: Total Private in Corpus Christi, TX (MSA)",
        "createdate": "2016-10-15T23:38:49",
        "changedate": "2017-02-16T11:32:01",
        "id": 43,
        "datefrom": "2006-12-31",
        "categoryid": 3,
        "frequency": 8
      },
      {
        "feed": "Macroeconomic_And_Major_Markets",
        "unit": "Index 2015=100",
        "file": "CP0910CZM086NEST.csv",
        "cassid": "84483d95-d914-45ab-a87a-8c063bfc6d0f",
        "name": "Harmonized Index of Consumer Prices: Audio-Visual, Photographic, and Information Processing Equipment for Czech Republic",
        "createdate": "2016-10-15T23:38:49",
        "changedate": "2017-02-16T11:35:04",
        "id": 44,
        "datefrom": "1999-11-30",
        "categoryid": 3,
        "frequency": 5
      },
      {
        "feed": "Macroeconomic_And_Major_Markets",
        "unit": "$ per Week",
        "file": "SMU41187000500000011SA.csv",
        "cassid": "285056e3-94ce-4266-98b4-ddf32602c0c2",
        "name": "Average Weekly Earnings of All Employees: Total Private in Corvallis, OR (MSA)",
        "createdate": "2016-10-15T23:38:49",
        "changedate": "2017-01-09T00:50:01",
        "id": 45,
        "datefrom": "2006-12-31",
        "categoryid": 3,
        "frequency": 5
      },
      {
        "feed": "Macroeconomic_And_Major_Markets",
        "unit": "Index 2015=100",
        "file": "CP0910DKM086NEST.csv",
        "cassid": "9798eadf-1503-48a5-91e3-cad5852db745",
        "name": "Harmonized Index of Consumer Prices: Audio-Visual, Photographic, and Information Processing Equipment for Denmark",
        "createdate": "2016-10-15T23:38:49",
        "changedate": "2017-02-16T11:35:04",
        "id": 46,
        "datefrom": "1995-12-31",
        "categoryid": 3,
        "frequency": 5
      },
      {
        "feed": "Macroeconomic_And_Major_Markets",
        "unit": "$ per Week",
        "file": "SMU41187000500000011.csv",
        "cassid": "d4b22376-2f84-404f-a175-c04ad8ced5a5",
        "name": "Average Weekly Earnings of All Employees: Total Private in Corvallis, OR (MSA)",
        "createdate": "2016-10-15T23:38:49",
        "changedate": "2017-01-09T00:50:01",
        "id": 47,
        "datefrom": "2006-12-31",
        "categoryid": 3,
        "frequency": 5
      },
      {
        "feed": "Macroeconomic_And_Major_Markets",
        "unit": "Index 2015=100",
        "file": "CP0910EEM086NEST.csv",
        "cassid": "72880ba0-722e-46bb-98f4-7d388d217c26",
        "name": "Harmonized Index of Consumer Prices: Audio-Visual, Photographic, and Information Processing Equipment for Estonia",
        "createdate": "2016-10-15T23:38:49",
        "changedate": "2017-02-16T11:35:04",
        "id": 48,
        "datefrom": "1995-12-31",
        "categoryid": 3,
        "frequency": 5
      },
      {
        "feed": "Macroeconomic_And_Major_Markets",
        "unit": "$ per Week",
        "file": "SMU41187000500000011A.csv",
        "cassid": "03fdf50e-9cd9-483b-aecf-1a0a9e93fa4d",
        "name": "Average Weekly Earnings of All Employees: Total Private in Corvallis, OR (MSA)",
        "createdate": "2016-10-15T23:38:49",
        "changedate": "2017-02-16T11:32:01",
        "id": 49,
        "datefrom": "2006-12-31",
        "categoryid": 3,
        "frequency": 8
      },
      {
        "feed": "Macroeconomic_And_Major_Markets",
        "unit": "Index 2005=100",
        "file": "CP0910EZ17M086NEST.csv",
        "cassid": "2943c0f2-ad55-4ec4-98d0-70db25deaefc",
        "name": "Harmonized Index of Consumer Prices: Audio-Visual, Photographic, and Information Processing Equipment for Euro area (17 countries) (DISCONTINUED)",
        "createdate": "2016-10-15T23:38:49",
        "changedate": "2017-02-16T11:35:04",
        "id": 50,
        "datefrom": "1995-12-31",
        "categoryid": 3,
        "frequency": 5
      }
    ],
    "draw": 1,
    "recordsTotal": 488
  }
  </code></pre>