Gson日期問題處理和解決爲null問題

GsonBuilder gb = new GsonBuilder();
	gb.setDateFormat("yyyy-MM-dd HH:mm");
	gb.registerTypeAdapter(Date.class, new JsonDeserializer<Date>() {
		DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm");
		@Override
		public Date deserialize(final JsonElement json, final Type typeOfT, final JsonDeserializationContext context) throws JsonParseException {
			try {
				return df.parse(json.getAsString());
			} catch (ParseException e) {
				return null;
			}
		}
	});

	gb.registerTypeAdapter(Long.class, new JsonDeserializer<Long>() {
		@Override
		public Long deserialize(final JsonElement json, final Type typeOfT, final JsonDeserializationContext context) throws JsonParseException {
			if (json.isJsonNull() || json.getAsString().length() == 0) {
				return null;
			}
			try {
				return json.getAsLong();
			} catch (NumberFormatException e) {
				return null;
			}
		}
	});

	gb.registerTypeAdapter(Integer.class, new JsonDeserializer<Integer>() {
		@Override
		public Integer deserialize(final JsonElement json, final Type typeOfT, final JsonDeserializationContext context)
				throws JsonParseException {
			if (json.isJsonNull() || json.getAsString().length() == 0) {
				return null;
			}

			try {
				return json.getAsInt();
			} catch (NumberFormatException e) {
				return null;
			}
		}
	});

	gson = gb.create();
}