How do I create a complex json object in java?

Question

I'm trying to create this json object in java and struggling:

{     "notification": {         "message": "test",         "sound": "sounds/alarmsound.wav",         "target": {             "apps": [                 {                     "id": "app_id",                     "platforms": [                         "ios"                     ]                 }             ]         }     },     "access_token": "access_token" } 

Any assistance in how someone would create that in java would be appreciated!

Answer 1

If you really are looking into creating JSON objects, Jackson has all you want:

final JsonNodeFactory factory = JsonNodeFactory.instance;  final ObjectNode node = factory.objectNode();  final ObjectNode child = factory.objectNode(); // the child  child.put("message", "test");  // etc etc  // and then:  node.set("notification", child); // node.put(String, ObjectNode) has been deprecated 

The resulting node is an ObjectNode, which inherits JsonNode, which means you get all of JsonNode's niceties:

• a sensible .toString() representation;
• navigation capabilities (.get(), .path() -- GSON has no equivalent for that, in particular not .path(), since it cannot model a node that is missing);
• MissingNode to represent a node that isn't there, and NullNode to represent JSON null, all of which inherit JsonNode (GSON has no equivalent for that -- and all of JsonNode's navigation methods are also available on such nodes);
• and of course .equals()/.hashCode().