UE5 c++ 的文件操作（记录备忘）

函数库.h

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "Microsoft/AllowMicrosoftPlatformTypes.h"
#include "FileWriteAndRead.generated.h"

/**
 * 
 */
UCLASS()
class SPLINECPP_API UFileWriteAndRead : public UBlueprintFunctionLibrary
{
	GENERATED_BODY()

	UFUNCTION(BlueprintCallable,Category = "FileWriteAndRead")
	static FString ReadFromFile(FString Dir);

	UFUNCTION(BlueprintCallable,Category = "FileWriteAndRead")
	static void WriteToFile(FString FileName,FString content);

	UFUNCTION(BlueprintCallable,Category = "FileWriteAndRead")
	static TArray FindFiles(FString Patch,FString Filter,bool Files,bool Directory);

	UFUNCTION(BlueprintCallable,Category = "FileWriteAndRead")
	static bool MoveFileTo(FString To,FString From);

	UFUNCTION(BlueprintCallable,Category = "FileWriteAndRead")
	static bool DeleteFile(FString FilePath);

	UFUNCTION(BlueprintCallable,Category = "FileWriteAndRead")
	static void OpenFile(FString FilePath);

	UFUNCTION(BlueprintCallable,Category = "FileWriteAndRead")
	static void CreateDir(FString FilePath);

	UFUNCTION(BlueprintCallable,Category = "FileWriteAndRead")
	static void DeleteDic(FString FilePath);
	
};

函数库.cpp

// Fill out your copyright notice in the Description page of Project Settings.


#include "FileWriteAndRead.h"
#include "HAL/FileManagerGeneric.h"


FString UFileWriteAndRead::ReadFromFile(FString Dir)
{
	FString Result;
	FFileHelper::LoadFileToString(Result,*(FPaths::ProjectDir()+Dir));
	return Result;
}

void UFileWriteAndRead::WriteToFile(FString FileName, FString content)
{
	FFileHelper::SaveStringToFile(content,*(FPaths::ProjectDir()+FileName));
}

//查找文件或文件夹
TArray UFileWriteAndRead::FindFiles(FString Patch, FString Filter, bool Files, bool Directory)
{
	TArray FilePathList;
	FilePathList.Empty();
	FFileManagerGeneric::Get().FindFilesRecursive(FilePathList,*Patch,*Filter,Files,Directory);
	return FilePathList;
}

//移动文件到其他位置
bool UFileWriteAndRead::MoveFileTo(FString To, FString From)
{
	return IFileManager::Get().Move(*To,*From);
}

//删除文件
bool UFileWriteAndRead::DeleteFile(FString FilePath)
{
	return IFileManager::Get().Delete(*FilePath);
}

//打开文件
void UFileWriteAndRead::OpenFile(FString FilePath)
{
	FPlatformProcess::CreateProc(*(FPaths::ProjectDir()+FilePath),nullptr,true,false,false,nullptr,0,nullptr,nullptr);
}

//新建文件夹
void UFileWriteAndRead::CreateDir(FString FilePath)
{
	IPlatformFile& PlatformFile = FPlatformFileManager::Get().GetPlatformFile();
}

//删除文件夹
void UFileWriteAndRead::DeleteDic(FString FilePath)
{
	IPlatformFile& PlatformFile = FPlatformFileManager::Get().GetPlatformFile();
	PlatformFile.DeleteDirectory(*FilePath);
}