Java - Jackson JSON Library and ObjectMapper.readValue -

i have following json data (patients.json):

{      "a" : {          "name" : "tom",          "age" : 12      },      "b" : {          "name" : "jim",          "age" : 54      }  } 

using jackson json library, how can following:

hashmap<string, ???> patients = objectmapper.readvalue(new file("patients.json"), ???);  string aname = patients.get("a").get("name"); int aname = patients.get("a").get("age"); 

you create class map patients to;

private static class patient {     @jsonproperty("name")     private string name;     @jsonproperty("age")     private int age;      public patient() { }      public string getname() {         return name;     }      public int getage() {         return age;     } } 

then read json via jackson

hashmap<string, patient> patients = objectmapper.readvalue(new file("patients.json"), new typereference<hashmap<string,patient>>() {}); patient patienta = patients.get("a"); string patientaname = patienta.getname(); int pateintaage = patienta.getage();