Tag: gson

Serialize and Deserialize Joda Time in Gson

register a TypeAdapter with GSON to wrap the use of a Joda preconfigured Formatters :

    public static Gson gsonDateTime() {
    Gson gson = new GsonBuilder()
            .registerTypeAdapter(DateTime.class, new JsonSerializer<DateTime>() {
                @Override
                public JsonElement serialize(DateTime json, Type typeOfSrc, JsonSerializationContext context) {
                    return new JsonPrimitive(ISODateTimeFormat.dateTime().print(json));
                }
            })
            .registerTypeAdapter(DateTime.class, new JsonDeserializer<DateTime>() {
                @Override
                public DateTime deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
                    DateTime dt = ISODateTimeFormat.dateTime().parseDateTime(json.getAsString());
                    return dt;
                }
            })
            .create();
    return gson;
}

References
https://stackoverflow.com/questions/14996663/is-there-a-standard-implementation-for-a-gson-joda-time-serialiser

Configure gson in Spring using GsonHttpMessageConverter [deprecated]

WebMvcConfigurerAdapter is deprecated. As of Spring 5.0 do this, so this is not working any more and we should use Force Spring Boot to use Gson instead of Jackson

Excluding jackson from classpath

@SpringBootApplication
@EnableAutoConfiguration(exclude = { JacksonAutoConfiguration.class })
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

Using java config

@Configuration
@EnableWebMvc
public class Application extends WebMvcConfigurerAdapter {

    @Override
    public void configureMessageConverters(List<HttpMessageConverter < ? >> converters) {
        GsonHttpMessageConverter gsonHttpMessageConverter = new GsonHttpMessageConverter();
        converters.add(gsonHttpMessageConverter);
    }
}

References
https://www.leveluplunch.com/java/tutorials/023-configure-integrate-gson-spring-boot/