Question

我有一个哈希图的哈希图，该哈希图需要序列化（Map ），目前仅处理Strings。当前使用gson对其进行序列化。

{cb9b4b3d-8d2e-41b2-9a21-1657dbd14f58 = {tz：“ eeee” dis：“ aaaa” geoAddr：“ cccc，dddd” id：@ cb9b4b3d-8d2e-41b2-9a21-1657dbd14f58 geoState：“ dddd”区域：1000ft²geoCity：“ cccc” bbbb}}

Gson gson = new GsonBuilder().create();
String string = gson.toJson(map);

但是似乎通过添加以下中间键值对和哈希码来改变整体结构。

{“ cb9b4b3d-8d2e-41b2-9a21-1657dbd14f58”：{“ map”：{“ tz”：{“ val”：“ eeee”}，“ dis”：{“ val”：“ aaaa”}， “ geoAddr”：{“ val”：“ cccc，dddd”}，“ id”：{“ val”：“ cb9b4b3d-8d2e-41b2-9a21-1657dbd14f58”}，“ geoState”：{“ val”：“ dddd” }，“ area”：{“ val”：1000.0，“ unit”：“ft²”}，“ geoCity”：{“ val”：“ cccc”}，“ bbbb”：{}}，“ hashCode”：0} }

将其反序列化回Map时，最终会得到额外的键值对。

Gson gson = new Gson();
Type listType = new TypeToken<Map<String, Map>>()
{
}.getType();
map = gson.fromJson(string, listType);

{cb9b4b3d-8d2e-41b2-9a21-1657dbd14f58 = {map = {tz = {val = eeee}，dis = {val = aaaa}，geoAddr = {val = cccc，dddd}，id = {val = cb9b4b3d -8d2e-41b2-9a21-1657dbd14f58}，geoState = {val = dddd}，area = {val = 1000.0，unit =ft²}，geoCity = {val = cccc}，bbbb = {}}，hashCode = 0.0}} < / p>

有没有一种方法可以反序列化为原来的结构。我使用的第三方库不了解此反序列化的Map。

Answer 1

这对我有用（gson 2.8）：

public static void main(String[] args) {
    String json = "{"
        + "  \"cb9b4b3d-8d2e-41b2-9a21-1657dbd14f58\": {"
        + "    \"tz\": \"eeee\","
        + "    \"dis\": \"aaaa\","
        + "    \"geoAddr\": \"cccc\","
        + "    \"id\": \"cb9b4b3d-8d2e-41b2-9a21-1657dbd14f58\","
        + "    \"geoState\": \"dddd\","
        + "    \"area\": 1000,"
        + "    \"geoCity\": \"cccc\""
        + "  }"
        + "}";

    Gson gson = new GsonBuilder().setPrettyPrinting().create();
    Map<String, Map<String, Object>> map = gson.fromJson(json, new TypeToken<Map<String, Map<String, Object>>>(){}.getType());
    System.out.println("Map.toString() is:");
    System.out.println(map);
    String serialisedMap = gson.toJson(map);
    System.out.println("Map to json is:");
    System.out.println(serialisedMap);
}

打印：

Map.toString() is:
{cb9b4b3d-8d2e-41b2-9a21-1657dbd14f58={tz=eeee, dis=aaaa, geoAddr=cccc, id=cb9b4b3d-8d2e-41b2-9a21-1657dbd14f58, geoState=dddd, area=1000.0, geoCity=cccc}}
Map to json is:
{
  "cb9b4b3d-8d2e-41b2-9a21-1657dbd14f58": {
    "tz": "eeee",
    "dis": "aaaa",
    "geoAddr": "cccc",
    "id": "cb9b4b3d-8d2e-41b2-9a21-1657dbd14f58",
    "geoState": "dddd",
    "area": 1000.0,
    "geoCity": "cccc"
  }
}

Hashmap的Gson序列化

1 个答案: