用jackson封装的JSON工具类

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;
    }
}