Convert JSON from one format to another JSON format in java

I have to covert a specific JSON response and covert to some other format

For E.g. My input JSON is like

JSON1

[ { "propertyId":10081, "roomId":0, "startDate":"2018-01-29T00:00:00", "endDate":"2018-01-30T00:00:00", "priority":1, "message":"Test it", "id":158, "dateModifiedUtc":null }, { "propertyId":10081, "roomId":10021855, "startDate":"2018-01-29T00:00:00", "endDate":"2018-01-30T00:00:00", "priority":2, "message":"Check how it works", "id":159, "dateModifiedUtc":null }, { "propertyId":10081, "roomId":10021855, "startDate":"2018-01-29T00:00:00", "endDate":"2018-01-30T00:00:00", "priority":2, "message":"Check how it works", "id":160, "dateModifiedUtc":null } ] 

I need to replace some values for roomId and then convert json to below format and send it to some other endpoint

JSON2

{ "sitenotification":[ { "roomid":"10601", "priority":1, "startdate":"2017-08-10T15:50:52+03:00", "enddate":"2017-08-15T15:50:52+03:00", "sitemessage":"test" }, { "roomid":"10601", "priority":1, "startdate":"2017-08-10T15:50:52+03:00", "enddate":"2017-08-15T15:50:52+03:00", "customermessage":"test 2" } ] } 

I tried doing this in couple of ways like Deserialization using jackson and mapping it to specific class like below

@JsonIgnoreProperties(ignoreUnknown = true) public class FatNotificationsAttributesDataModel { @JsonProperty("propertyId") public int propertyId; @JsonProperty("roomId") public int roomId; @JsonProperty("startDate") public String startDate; @JsonProperty("endDate") public String endDate; @JsonProperty("priority") public int priority; @JsonProperty("message") public String message; @JsonProperty("id") public int id; @JsonProperty("dateModifiedUtc") public String dateModifiedUtc; } 

and then again serialising it using a different class

@JsonSerialize(using = CustomSerializer.class) public class FinalDataModel { public int roomId; public String startDate; public String endDate; public int priority; public String message; } 

But somehow the conversion is not working. Do we have any better way to achieve this?

2 Answers

Use Jolt Convertor. Simplest, and esiest way to convert any JSON to any other JSON format.

You can achieve that by using JSONObject and JSONArray

//Create a JSON array with your json string JSONArray array = new JSONArray(jsonString); JSONArray newArray = new JSONArray(); //loop on your JSONArray elements for (i=0, i<array.size(),i++) { //Get each separate object into a JSONObject JSONObject obj = array.getJSONObject(i); //let say you want to modify id for example obj.put("id", 12345); //push the modifyed object into your new array newArray.put(obj); } //transform the array into a string String json = newArray.toString();