package hjp.smart4j.framework.util;

import com.fasterxml.jackson.databind.ObjectMapper;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * JSON 工具类

 */

public final class JsonUtil {

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

    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

    /**

     * 将POJO转为JSON

     */

    public static <T> String toJson(T obj) {

        String json;

        try {

            json = OBJECT_MAPPER.writeValueAsString(obj);

        } catch (Exception e) {

            LOGGER.error("convert POJO to JSON failure", e);

            throw new RuntimeException(e);

        }

        return json;

    }

    /**

     * 将JSON转为POJO

     */

    public static <T> T fromJson(String json, Class<T> type) {

        T pojo;

        try {

            pojo = OBJECT_MAPPER.readValue(json, type);

        } catch (Exception e) {

            LOGGER.error("convert JSON to POJO failure", e);

            throw new RuntimeException(e);

        }

        return pojo;

    }

}