gson json转换对象及对象对象转换为json帮助类

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import java.util.ArrayList;import java.util.List;import java.util.Map;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.google.gson.Gson;import com.google.gson.reflect.TypeToken;public class GsonUtil {    /**     * 日志     */    private static final Logger LOGGER = LoggerFactory.getLogger(GsonUtil.class);    /**     * 对象转换为json     *      * @param value     * @return     */    public static String createJsonString(Object value) {        Gson gson = new Gson();        String str = gson.toJson(value);//      LOGGER.info("转换JSON成功!!{}", str);        return str;    }    /**     * json 转换为对象     *      * @param jsonString     * @param cls     * @return     */    public static <T> T getPerson(String jsonString, Class<T> clazz) {        T t = null;        try {            Gson gson = new Gson();            t = gson.fromJson(jsonString, clazz);        } catch (Exception e) {            LOGGER.error("JSON转换成对象失败!!{}{}", jsonString, e);        }        return t;    }    /**     * json转换为List<Object>     * @param jsonString     * @param cls     * @return     */    public static <T> List<T> getPersons(String jsonString, Class<T> clazz) {        List<T> list = new ArrayList<T>();        try {            Gson gson = new Gson();            list = gson.fromJson(jsonString, new TypeToken<List<T>>() {}.getType());        } catch (Exception e) {            LOGGER.error("JSON转换成对象失败!!{}{}", jsonString, e);        }        return list;    }    /**     * json转换为List<Map<String, Object>>     * @param jsonString     * @return     */    public static List<Map<String, Object>> listKeyMaps(String jsonString) {        List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();        try {            Gson gson = new Gson();            list = gson.fromJson(jsonString, new TypeToken<List<Map<String, Object>>>() {            }.getType());        } catch (Exception e) {            LOGGER.error("JSON转换成对象失败!!{}{}", jsonString, e);        }        return list;    }    /**     * 将Map转化为Json     *      * @param map     * @return String     */    public static <T> String mapToJson(Map<String, T> map) {     Gson gson = new Gson();     String jsonStr = gson.toJson(map);     return jsonStr;    }}
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