如何将JsonObject转换为JSON字符串? [英] How can I convert a JsonObject to a JSON String?
问题描述
我正在尝试将结构及其包含的数据转换为合法的JSON字符串.我在C ++中的虚幻引擎中工作.
I'm trying to convert a struct and the data it contains into a legitimate JSON String. I work in Unreal Engine in C++.
我要转换的结构:
USTRUCT()
struct DATALOGGING_API FGURaaSDataStruct
{
GENERATED_USTRUCT_BODY()
public:
UPROPERTY()
FString id_session = "test";
UPROPERTY()
TArray<FData> data;
};
在先前的结构中使用的结构:
Struct that is used in the previous struct:
USTRUCT()
struct DATALOGGING_API FData
{
GENERATED_USTRUCT_BODY()
public:
UPROPERTY()
FString data;
UPROPERTY()
FString tag1;
UPROPERTY()
FString tag2;
UPROPERTY()
FString tag3;
UPROPERTY()
FString tag4;
UPROPERTY()
TArray<FString> additional_tags;
UPROPERTY()
FString time;
};
当前方法:(JsonObject-UE4特定代码)
Current aproach: (JsonObject - UE4 specific code)
FGURaaSDataStruct tObj = FGURaaSDataStruct();
TSharedPtr<FJsonObject> jsonObject = FJsonObjectConverter::UStructToJsonObject<FGURaaSDataStruct>(tObj);
此处生成的JsonObject包含创建Json字符串所需的所有信息,理想情况下,我希望有一种简单的方法将此JsonObject转换为JSON字符串.
The JsonObject generated here contains all the information necessary to create a Json String, ideally I would like to have a simple way to convert this JsonObject into an JSON String.
推荐答案
这会将Json序列化为OutputString,然后您就可以随意执行任何操作.
This will serialize the Json to OutputString which you are then free to do whatever you want.
有关更多信息,请参见在虚幻引擎4中使用Json .
For more information, see Using Json in Unreal Engine 4.
void FStructToJsonString(FStructXXX _myStruct) {
TSharedPtr<FJsonObject> JsonObject = MakeShareable(new FJsonObject);
JsonObject->SetStringField("param1", _myStruct.param1);
JsonObject->SetStringField("param2", _myStruct.param2);
FString OutputString;
TSharedRef< TJsonWriter<> > Writer = TJsonWriterFactory<>::Create(&OutputString);
FJsonSerializer::Serialize(JsonObject.ToSharedRef(), Writer);
UE_LOG(LogTemp, Warning, TEXT("resulting jsonString -> %s"), *OutputString);
}
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