像这样：

String json = "\"\\/Date(736032869080)\\/\"";
Gson gson = new GsonBuilder().registerTypeAdapter(Date.class, new NetDateTimeAdapter()).create();
System.out.println("Date=" + gson.fromJson(json, Date.class));

class NetDateTimeAdapter extends TypeAdapter<Date> {
    @Override
    public Date read(JsonReader reader) throws IOException {
        if (reader.peek() == JsonToken.NULL) {
            reader.nextNull();
            return null;
        }
        Date result = null;
        String str = reader.nextString();
        str = str.replaceAll("[^0-9]", "");
        if (!TextUtils.isEmpty(str)) {
            try {
                result = new Date(Long.parseLong(str));
            } catch (NumberFormatException e) {
            }
        }
        return result;
    }
    @Override
    public void write(JsonWriter writer, Date value) throws IOException {
        // Nah..
    }
}

或改用此示例，并遵循“使用WCF Microsoft JSON日期处理”一章。