UE4自带一个XmlParser,可以很方便的实现Xml的读写。
1,在PublicDependencyModuleNames.AddRange中添加XmlParser。
2,include XmlParser.h
读写操作封装在了xmlobject 需要根据需求增加 修改
xmlobject.h
// Fill out your copyright notice in the Description page of Project Settings. #pragma once #include "CoreMinimal.h" #include <map> /** * */ struct NodeStruct { FString tag; FString content; NodeStruct(FString Tag,FString Content) { tag = Tag; content = Content; } }; class TESTJIGOU_API XmlFileObject { public: XmlFileObject(const FString &filePath, const FString &fileName,int NodeCount = 0,...); ~XmlFileObject(); public: class FXmlFile* m_File; class FXmlNode* m_RootNode; FString m_FilePath; FString m_FileName; bool loadFileSuccess; public: bool SetNode(const FString &tag, const FString &content); bool SetNode(const FString &tag, int content); bool SetNode(const FString &tag, float content); bool AddChild(const FString &ParentNodeTag,const FString& ChildNodeTag,const FString &ChildNodeContent); bool AddChild(FXmlNode* ParentNode, const FString& ChildNodeTag, const FString& ChildNodeContent); FXmlNode* GetNode(const FString& tag,const FString &content); FXmlNode* GetChildNode(FXmlNode* TargetNode, const FString& ChildTag); FXmlNode* GetChildNode(FXmlNode* TargetNode, const FString& ChildTag, const FString& ChildContent); const TCHAR* GetChildNodeContent(FXmlNode* TargetNode, const FString& ChildTag); const TCHAR* GetNodeContent(const FString &tag); private: void Save(); };
xmlobject.cpp
// Fill out your copyright notice in the Description page of Project Settings. #include "XmlFileObject.h" #include "XmlParser.h" #include "Engine.h" #include "stdarg.h" XmlFileObject::XmlFileObject(const FString &filePath, const FString &fileName,int NodeCount, ...) : m_FileName(fileName), m_FilePath(filePath) { m_File = new FXmlFile(filePath + fileName); if (m_File == nullptr) { GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Red, TEXT("打开Xml文件失败啦")); loadFileSuccess = false; } else { m_RootNode = m_File->GetRootNode(); if (m_RootNode == nullptr) { GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Red, TEXT("获取根节点失败啦")); const FString XmlRootNodeContent = "<RootNode> </RootNode>"; m_File = new FXmlFile(XmlRootNodeContent, EConstructMethod::ConstructFromBuffer); if (m_File == nullptr) { GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Red, TEXT("创建Xml文件失败啦")); loadFileSuccess = false; } else { GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Green, TEXT("创建Xml文件成功啦")); m_RootNode = m_File->GetRootNode(); if (NodeCount == 0) { GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Red, TEXT("没有创建默认Xml节点")); loadFileSuccess = true; } va_list arg_ptr; va_start(arg_ptr, NodeCount); for (int i = 0; i < NodeCount; i++) { auto node = va_arg(arg_ptr, NodeStruct); SetNode(node.tag, node.content); } va_end(arg_ptr); loadFileSuccess = true; this->Save(); } } else { loadFileSuccess = true; this->Save(); GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Green, TEXT("打开Xml文件成功啦")); } } } XmlFileObject::~XmlFileObject() { } void XmlFileObject::Save() { m_File->Save(m_FilePath + m_FileName); } bool XmlFileObject::SetNode(const FString &tag, const FString &content) { FXmlNode* FindNode = m_RootNode->FindChildNode(tag); if (FindNode == nullptr) { GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Red, TEXT("不存在该Node")); m_RootNode->AppendChildNode(tag, content); if (m_RootNode->FindChildNode(tag) == nullptr) { GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Green, TEXT("创建Node失败")); return false; } else { GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Green, TEXT("创建Node成功")); this->Save(); return true; } } else { FindNode->SetContent(content); GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Green, TEXT("设置Node成功")); this->Save(); return true; } } bool XmlFileObject::SetNode(const FString &tag, int content) { return this->SetNode(tag, FString::FromInt(content)); } bool XmlFileObject::SetNode(const FString &tag, float content) { return this->SetNode(tag, FString::SanitizeFloat(content)); } bool XmlFileObject::AddChild(const FString &ParentNodeTag, const FString& ChildNodeTag, const FString &ChildNodeContent) { auto ParentNode = m_RootNode->FindChildNode(ParentNodeTag); return this->AddChild(ParentNode, ChildNodeTag, ChildNodeContent); } bool XmlFileObject::AddChild(FXmlNode* ParentNode, const FString& ChildNodeTag, const FString& ChildNodeContent) { if (ParentNode == nullptr) { GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Red, TEXT("该节点不存在,无法给该节点添加子节点")); return false; } else { ParentNode->AppendChildNode(ChildNodeTag, ChildNodeContent); if (ParentNode->FindChildNode(ChildNodeTag) == nullptr) { GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Red, TEXT("子节点创建失败")); return false; } else { GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Green, TEXT("子节点创建成功")); this->Save(); return true; } } } FXmlNode* XmlFileObject::GetNode(const FString& tag, const FString &content) { // auto FindNodeList = m_RootNode->GetChildrenNodes(); // // for (auto node : FindNodeList) // { // if (node->GetContent().Equals(content) && node->GetTag().Equals(tag)) // { // return node; // } // } // return nullptr; return this->GetChildNode(m_RootNode, tag, content); } FXmlNode* XmlFileObject::GetChildNode(FXmlNode* TargetNode, const FString& ChildTag, const FString& ChildContent) { auto FindNodeList = TargetNode->GetChildrenNodes(); for (auto node : FindNodeList) { if (node->GetContent().Equals(ChildContent) && node->GetTag().Equals(ChildTag)) { return node; } } return nullptr; } FXmlNode* XmlFileObject::GetChildNode(FXmlNode* TargetNode, const FString& ChildTag) { auto FindNodeList = TargetNode->GetChildrenNodes(); for (auto node : FindNodeList) { if (node->GetTag().Equals(ChildTag)) { return node; } } return nullptr; } const TCHAR* XmlFileObject::GetChildNodeContent(FXmlNode* TargetNode, const FString& ChildTag) { const TCHAR* result = *(GetChildNode(TargetNode, ChildTag)->GetContent()); return result; } const TCHAR* XmlFileObject::GetNodeContent(const FString &tag) { FXmlNode* findNode = m_RootNode->FindChildNode(tag); if (findNode == nullptr) { GEngine->AddOnScreenDebugMessage(-1, 10.0f, FColor::Red, TEXT("查找该Node失败")); //错误代码2222 const TCHAR* tempChar = *FString("2222"); return tempChar; } else { const TCHAR* tempChar = *(findNode->GetContent()); return tempChar; } }