做足彩推荐赚钱的网站品牌营销是什么

核心是这个类 MapTypeAdapter。

好像是如果字段的类型 定义为Object ,就会出现 int类型变double类型

public class GsonUtil {/*** 实现格式化的时间字符串转时间对象*/private static final String DATEFORMAT_default = "yyyy-MM-dd HH:mm:ss";/*** 使用默认的gson对象进行反序列化** @param json* @param typeToken* @return*/public static <T> T fromJsonDefault(String json, TypeToken<T> typeToken) {Gson gson = new Gson();return gson.fromJson(json, typeToken.getType());}/*** json字符串转list或者map** @param json* @param typeToken* @return*/public static <T> T fromJson(String json, TypeToken<T> typeToken) {Gson gson = new GsonBuilder()/*** 重写map的反序列化*/.registerTypeAdapter(new TypeToken<Map<String, Object>>() {}.getType(), new MapTypeAdapter()).create();return gson.fromJson(json, typeToken.getType());}/*** json字符串转bean对象** @param json* @param cls* @return*/public static <T> T fromJson(String json, Class<T> cls) {Gson gson = new GsonBuilder().setDateFormat(DATEFORMAT_default).create();return gson.fromJson(json, cls);}/*** 对象转json** @param obj* @param format* @return*/public static String toJson(Object obj, boolean format) {GsonBuilder gsonBuilder = new GsonBuilder();/*** 设置默认时间格式*/gsonBuilder.setDateFormat(DATEFORMAT_default);/*** 添加格式化设置*/if (format) {gsonBuilder.setPrettyPrinting();}Gson gson = gsonBuilder.create();return gson.toJson(obj);}public static class MapTypeAdapter extends TypeAdapter<Object> {@Overridepublic Object read(JsonReader in) throws IOException {JsonToken token = in.peek();switch (token) {case BEGIN_ARRAY:List<Object> list = new ArrayList<Object>();in.beginArray();while (in.hasNext()) {list.add(read(in));}in.endArray();return list;case BEGIN_OBJECT:Map<String, Object> map = new LinkedTreeMap<String, Object>();in.beginObject();while (in.hasNext()) {map.put(in.nextName(), read(in));}in.endObject();return map;case STRING:return in.nextString();case NUMBER:/*** 改写数字的处理逻辑，将数字值分为整型与浮点型。*/double dbNum = in.nextDouble();// 数字超过long的最大值，返回浮点类型if (dbNum > Long.MAX_VALUE) {return dbNum;}// 判断数字是否为整数值long lngNum = (long) dbNum;if (dbNum == lngNum) {return lngNum;} else {return dbNum;}case BOOLEAN:return in.nextBoolean();case NULL:in.nextNull();return null;default:throw new IllegalStateException();}}@Overridepublic void write(JsonWriter out, Object value) throws IOException {// 序列化无需实现}}