GSON 간단 사용 예

멤버의 경우 private, public 구분 없고, set,get 메쏘드 불필요.

 

1. Serialize

class Model {

    private String id = "111";

    private String name = "model";

    private String type;

};

 

Gson gson = new Gson();

Model model = new Model();

String jsonString = gson.toJson( model );

 

result)

{"id":"111","name":"model"}

 

 

2. 값이 null인 녀석도 표시

Gson gson = new GsonBuilder().serializeNulls().create();

Model model = new Model();

String jsonString = gson.toJson( model );

 

result)

{"id":"111","name":"model","type":null}

 

3. 이너 클래스 : static 클래스만 사용가능

class Model {

    private String id = "111";

    private String name = "model";

    private String type;

    private Item   item = new Item();

    

    public static class Item {

        String title = "제목";

        String msg;

    };

};

 

result)

{"id":"111","name":"model","type":null,"item":{"title":"제목","msg":null}}

 

 

4. 오브젝트 배열

class Model {

    private String id = "111";

    private String name = "model";

    private String type;

    public ArrayList<Item> list = new ArrayList<Item>();

    

    public static class Item {

        String title = "제목";

        String msg;

    };

};

 

Model mode = new Model();

mode.list.add( new Item() );

mode.list.add( new Item() );

 

retuls)

{"id":"111","name":"model","type":null,"list":[{"title":"제목","msg":null},{"title":"제목","msg":null}]}

 

5. Generic type

class Model<T> {

    private String id = "111";

    private String name = "model";

    private T type;

};

 

Type modelType = new TypeToken<Model<String>>() {}.getType();

gson.toJson( model, modelType );

 

 

기타 등등..

 

-_-;;