java serialize object to json

1public class someClass {
2//your lcode and logic...
3ObjectMapper mapper = new ObjectMapper();
4SimpleModule module = new SimpleModule();
5module.addSerializer(MyAwesomeClass.class, new MyAwesomeSerializer());
6mapper.registerModule(module);
7
8jsonNode = mapper.convertValue(myAwesomeObject, JsonNode.class);
9//... your code and logic
10}
11  
12public class MyAwesomeSerializer extends StdSerializer<MyAwesomeClass> {
13
14    public MyAwesomeSerializer() {
15        super(MyAwesomeClass.class);
16    }
17
18    @Override
19    public void serialize(MyAwesomeClass myAwesomeClass, JsonGenerator jgen, SerializerProvider provider) throws IOException {
20        ObjectMapper mapper = new ObjectMapper();
21
22        jgen.writeStartObject();
23        jgen.writeStringField("name", myAwesomeClass.getName());
24        jgen.writeStringField("age", myAwesomeClass.getAge());
25
26          jgen.writeArrayFieldStart("hobbies");
27          for (Hobby hobby : myAwesomeClass.getHobbies()) {
28              jgen.writeObject(mapper.convertValue(hobby, JsonNode.class));
29          }
30          jgen.writeEndArray();
31      
32        jgen.writeEndObject();
33    }
34
35}