[fasterxml]json 도구 류

/**
 * json    
 * 

 * Created by xlch at 2018/6/26
 */
public class JsonUtil {


    private JsonUtil() {

    }

    private static final Logger LOGGER = LoggerFactory.getLogger(JsonUtil.class);

    private static final ObjectMapper mapper = new ObjectMapper();


    static {
        //           null   ：   
        mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        //                 ：  
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        //        
        mapper.setPropertyNamingStrategy(PropertyNamingStrategy.LOWER_CAMEL_CASE);

    }


    public  static  T json2Object(String source, Class classType) {
        try {
            return mapper.readValue(source, classType);
        } catch (IOException e) {
            LOGGER.debug("exception is ", e);
            throw new VastioException("json     ");
        }
    }

    public static  List json2ObjectList(String source, Class classType) {
        JavaType javaType = mapper.getTypeFactory().constructParametricType(List.class, classType);
        try {
            return mapper.readValue(source, javaType);
        } catch (IOException e) {
            LOGGER.debug("exception is ", e);
            throw new VastioException("json list     ");
        }
    }

    public static  String objects2Json(T source) {
        try {
            return mapper.writeValueAsString(source);
        } catch (JsonProcessingException e) {
            LOGGER.debug("exception is {}", e);
            throw new VastioException("json     ");
        }
    }
}