I have JSON data like that:
[ {
"data": "data",
"what": "what2",
"when": 1392046352,
"id": 13,
"tags": "checkid:testcheckid, target:server.id.test, id:testid"
}, {
"data": "Test",
"what": "Test",
"when": 1395350977,
"id": 5,
"tags": "checkid:testcheckid, target:server.id.test, id:testid"
} ]
I have a Java class and I want to convert this JSON to a list of instances of my class. I found how to convert a single object, but not a list.
With Jackson you would do something like:
String jsonStr = "...";
ObjectReader reader = new ObjectMapper().reader();
List<Map<String, Object>> objs = reader.readValue(jsonStr);
Map<String, Object> myFirstObj = objs.get(0);
myFirstObj.get("data");
myFirstObj.get("what");
// and so on
Or even better you can create a pojo and do:
String jsonStr = "...";
ObjectMapper mapper = new ObjectMapper();
List<MyPojo> myObjs = mapper.readValue(jsonStr, new TypeReference<List<MyPojo>>() {});
MyPojo myPojo = myObjs.get(0);
myPojo.getData();
myPojo.getWhat();
// and so on
JsonNode if values can be anything
JsonNode ;) It can model any JSON value.get() methods are defined on JsonNode after all (note also the .path() methods)There are several libraries out there that will parse JSON, such as GSon and Jackson. If the functionality isn't provided out-of-box, you can write a custom deserializer that will do what you need.
I don't really understand your problem, if you already have and object just create a list (ArrayList for example) and add them.
ArrayList<YourObject> list = new ArrayList<YourObject>();
list.add(yourObject);
