GSON封装Utils

public class GsonUtils {/**
     * 将Json数据解析成相应的映射对象
     *
     * @param jsonData
     * @param type
     * @param <T>
     * @return
     */
    public static <T> T parseJsonWithGson(String jsonData, Class<T> type) {T result = null;if (!TextUtils.isEmpty(jsonData)) {Gson gson = new GsonBuilder().create();try {result = gson.fromJson(jsonData, type);} catch (Exception e) {e.printStackTrace();} finally {if (gson != null) {gson = null;}}}return result;}/**
     * 将Json数组解析成相应的映射对象List
     *
     * @param jsonData
     * @param type
     * @param <T>
     * @return
     */
    public static <T> List<T> parseJsonArrayWithGson(String jsonData, Class<T> type) {List<T> result = null;if (!TextUtils.isEmpty(jsonData)) {Gson gson = new GsonBuilder().create();try {JsonParser parser = new JsonParser();JsonArray Jarray = parser.parse(jsonData).getAsJsonArray();if (Jarray != null) {result = new ArrayList<>();for (JsonElement obj : Jarray) {try {T cse = gson.fromJson(obj, type);result.add(cse);} catch (Exception e) {e.printStackTrace();}}}} catch (Exception e) {e.printStackTrace();} finally {if (gson != null) {gson = null;}}}return result;}/**
     * 将对象转换成Json
     *
     * @param entity
     * @param <T>
     * @return
     */
    public static <T> String toJsonWithSerializeNulls(T entity) {entity.getClass();Gson gson = new GsonBuilder().serializeNulls().create();String result = "";try {result = gson.toJson(entity);} catch (Exception e) {e.printStackTrace();} finally {if (gson != null) {gson = null;}}return result;}/**
     * 将list排除值为null的字段转换成Json数组
     *
     * @param list
     * @param <T>
     * @return
     */
    public static <T> String toJsonArrayWithSerializeNulls(List<T> list) {Gson gson = new GsonBuilder().serializeNulls().create();String result = "";try {result = gson.toJson(list);} catch (Exception e) {e.printStackTrace();} finally {if (gson != null) {gson = null;}}return result;}/**
     * 将list中将Expose注解的字段转换成Json数组
     *
     * @param list
     * @param <T>
     * @return
     */
    public static <T> String toJsonArrayWithExpose(List<T> list) {Gson gson = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create();String result = "";try {result = gson.toJson(list);} catch (Exception e) {e.printStackTrace();} finally {if (gson != null) {gson = null;}}return result;}}