Jackson- How to process the request data passed as JSON (Netsed Json)?

Question

{
    "DistributionOrderId" : "Dist_id_1",
    "oLPN": 
    {
        "Allocation": 
        {
            "AID": "12345"      
        },
        "Allocation": 
        {
            "AID": "123456" ,
            "SerialNbr": "SRL001",
            "BatchNbr": "LOT001"
            "RevisionNbr": "RVNBR1"
        }
    },
    "oLPN": 
    {
        "Allocation": 
        {
            "AID": "12123"      
        }
        "Allocation": 
        {
            "AID": "12124"      
        }
    }
}

I have a JSON request passed from the vendor, How to store the values as Java POJO and use them further? Edit : Added attributes to JSON

wanglong · Answer 1 · 2021-03-25T07:58:08.210

0

json key can't repeat, and the repeat key with value will be discard. i have format your json text, may be it is like following expression:

{
    "DistributionOrderId" : "Dist_id_1",
    "oLPN": 
    [
      {
        "Allocation": 
          [
            {
              "AID": "123456" ,
              "SerialNbr": "SRL001",
              "BatchNbr": "LOT001",
              "RevisionNbr": "RVNBR1"
            },
            {
              "AID": "12345"
            }
          ] 
      },
      {
          "Allocation": 
          [
            {
                "AID": "12123"      
            },
            {
                "AID": "12124"      
            }
          ]
      }
    ]
}

and this struct match the java object is

class DistributionOrder{
  @JsonProperty("DistributionOrderId")
  String distributionOrderId;
  List<OLPN> oLPN;
}

class OLPN {
  @JsonProperty("Allocation")
  List<Allocation> allocation;
}

class Allocation{
  String AID;
  @JsonProperty("SerialNbr")
  String serialNbr;
  @JsonProperty("BatchNbr")
  String batchNbr;
  @JsonProperty("RevisionNbr")
  String revisionNbr;
}

edited Mar 25 '21 at 07:58

answered Mar 25 '21 at 06:41

wanglong

89
5

In my case I have multiple oLPN objects passed in the Json request, and also each olpn object will have mandatory weight and uom attribute. And each Allocation object will have optional "SerialNbr": "", "BatchNbr": "" “RevisionNbr”: “” attributes. What will be the correct JSON format in this case? – Harshith Rao Mar 25 '21 at 07:05
maybe you can send a example text with the most complex, json type can be expand, whatever you need @HarshithRao – wanglong Mar 25 '21 at 07:19
what you send means the oLPN and Allocation both array, and i would to say again: and json string can't hold same key name in same level. with what you need i have change my answer, if you also have question, just reply! @HarshithRao – wanglong Mar 25 '21 at 07:52
yes, i got it.. serialNbr,batchNbr,revisionNbr will not be passed always inside Allocation array. So in my Allocation POJO class, which json annotation should be used? ``` @JsonIgnoreProperties(ignoreUnknown = true) @JsonInclude(JsonInclude.Include.NON_NULL) public class Allocation { private String AID; private String SerialNbr; private String BatchNbr; private String RevisionNbr; ``` will above work? – Harshith Rao Mar 25 '21 at 09:37
if you want json text to pojo, the pojo must have all field that exists in json text, if you want pojo to json text, @JsonInclude(JsonInclude.Include.NON_NULL) can help filter the null value, just for use, if you understand, choose my answer, if not, just comment follow. – wanglong Mar 25 '21 at 09:44

score 0 · Answer 2 · answered Mar 25 '21 at 06:42

As you aren't using the usual camel case conventions common in jackson databinding I would suggest defining a java object with the appropriate annotations. The object is not currently valid json. If for example the json looks like this:

{
    "DistributionOrderId" : "Dist_id_1",
    "oLPN": [ ... ]
}

Where each oLPN in the array is an object like this:

{
    "Allocation": [{ "AID": ... }, { "AID": ... }, ... ]
}

You can write a class for distribution orders

public class DistributionOrder {
    @JsonProperty("DistributionOrderId") private String id;
    @JsonProperty("oLPN") private List<OLPN> olpn;
    // getters and setters
}

Then another for the OLPN object

public class OLPN {
    @JsonProperty("Allocation") private String allocation;
    @JsonProperty("AID") private String aid;
    // getters and setters
}

Then you can use an object mapper as appropriate. For example

ObjectMapper mapper = ... // get your object mapper from somewhere

DistributionOrder distributionOrder = mapper.readValue(raw, DistributionOrder.class);

Jackson- How to process the request data passed as JSON (Netsed Json)?

2 Answers2