Gson的使用-4

简单自定义序列化

public class User {
    private static final String APPLICATION_USER = "USER";
    private String name;
    private int age;
    public class UserData{
        private int id;
        private String name;
}
}

JsonSerializer<User.UserData> jsonSerializer = new JsonSerializer<User.UserData>() {
            @Override
            public JsonElement serialize(User.UserData src, Type typeOfSrc, JsonSerializationContext context) {
                JsonObject jsonObject = new JsonObject();
                jsonObject.addProperty("id",src.getId());
                return jsonObject;
            }
        };
        GsonBuilder gsonBuilder = new GsonBuilder();
        gsonBuilder.registerTypeAdapter(User.class,jsonSerializer);

简单自定义反序列化

JsonDeserializer<User.UserData> jsonDeserializer = new JsonDeserializer<User.UserData>() {
            @Override
            public User.UserData deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
                int id = json.getAsInt();
                return 
            }
        }
        GsonBuilder gsonBuilder = new GsonBuilder();
        gsonBuilder.registerTypeAdapter(User.class,jsonderializer);

jsonAdapter()注解；

自定义序列化和反序列化的过程

public class MerchantListSerializer implements JsonSerializer<List<Merchant>> {  
    @Override
    public JsonElement serialize(List<Merchant> src, Type typeOfSrc, JsonSerializationContext context) {
        JsonArray jsonMerchant = new JsonArray();

        for (Merchant merchant : src) {
            jsonMerchant.add("" + merchant.getId());
        }

        return jsonMerchant;
    }
}

public class UserSubscriptionAnnotation {  
    String name;
    String email;
    int age;
    boolean isDeveloper;

    // new!
    @JsonAdapter(MerchantListSerializer.class)
    List<Merchant> merchantList;
}