UE开发随笔------json与struct互相转换(FJsonObjectConverter)

UStruct定义：

USTRUCT()
struct FHeartBeatMsg
{GENERATED_BODY()
public:UPROPERTY()FString pcCode = TEXT("");UPROPERTY()FString deviceType = TEXT("");UPROPERTY()FString messageType = TEXT("");UPROPERTY()FString content = TEXT("");
};

使用相应转换函数需要添加相关插件模块，Json、JsonUtilities：

		PrivateDependencyModuleNames.AddRange(new string[]{"CoreUObject","Engine","Json","JsonUtilities"});

一、json转换为struct

1、json字符串转换为struct

    //FString JsonStrFHeartBeatMsg sRecMsg;FJsonObjectConverter::JsonObjectStringToUStruct<FHeartBeatMsg>(JsonStr, &sRecMsg, 0, 0);

2、json object转换为struct

	FHeartBeatMsg sRecMsg;FJsonObjectConverter::JsonObjectToUStruct<FHeartBeatMsg>(RootObj.ToSharedRef(), &sRecMsg, 0, 0);

附加：json字符串转json object

	//FString JsonStrTSharedRef<TJsonReader<TCHAR>> JsonReader = TJsonReaderFactory<TCHAR>::Create(JsonStr);TSharedPtr<FJsonObject> RootObj = MakeShareable(new FJsonObject);if (!FJsonSerializer::Deserialize(JsonReader, RootObj)){return;}

二、struct转换为json字符串

	FHeartBeatMsg sHeartBeatMsg;sHeartBeatMsg.pcCode = TEXT("123");sHeartBeatMsg.content = TEXT("test");;FString ContentJsonString;bool bRet = FJsonObjectConverter::UStructToJsonObjectString(FHeartBeatMsg::StaticStruct(), &sHeartBeatMsg, ContentJsonString, 0, 0);if (!bRet){//UE_LOGreturn;}

注意字符串大小写

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