cocos2d-x 3.2读取xml和json练习

读取和生成xml文件：

#include "tinyxml2/tinyxml2.h"using namespace tinyxml2;void HelloWorld::makeXml(const char* fileName){//写入路径std::string filePath = FileUtils::getInstance()->getWritablePath() + fileName;XMLDocument *pDoc = new XMLDocument();//头声明XMLDeclaration *pDecl = pDoc->NewDeclaration("xml=version=\"1.0\" encoding=\"UTF-8\"");pDoc->LinkEndChild(pDecl);//注释XMLComment *pCom = pDoc->NewComment("test xml");pDoc->LinkEndChild(pCom);XMLElement *plistEl = pDoc->NewElement("plist");plistEl->SetAttribute("version", "1.0");plistEl->SetAttribute("age", 10);pDoc->LinkEndChild(plistEl);XMLElement *dictEl = pDoc->NewElement("dict");plistEl->LinkEndChild(dictEl);XMLElement *keyEl = pDoc->NewElement("key");keyEl->LinkEndChild(pDoc->NewText("keyValue"));dictEl->LinkEndChild(keyEl);XMLElement *arrayEl = pDoc->NewElement("array");dictEl->LinkEndChild(arrayEl);for (int i = 0; i<2 ; i++){XMLElement *nameEl = pDoc->NewElement("name");nameEl->LinkEndChild(pDoc->NewText("array value"));arrayEl->LinkEndChild(nameEl);}pDoc->SaveFile(filePath.c_str());pDoc->Print();delete pDoc;}void HelloWorld::parseXml(const char* fileName){std::string filePath = FileUtils::getInstance()->getWritablePath() + fileName;XMLDocument *pDoc = new XMLDocument();XMLError errorID = pDoc->LoadFile(filePath.c_str());if (errorID != 0){return;}XMLElement *rootEl = pDoc->RootElement();const XMLAttribute *attribute = rootEl->FirstAttribute();while (attribute){CCLOG("name=%s, value = %s", attribute->Name(), attribute->Value());attribute = attribute->Next();}XMLElement *dictEl = rootEl->FirstChildElement("dict");XMLElement *keyEl = dictEl->FirstChildElement("key");if (keyEl){CCLOG("key el is = %s", keyEl->GetText());}XMLElement *arrayEl = keyEl->NextSiblingElement();XMLElement *childEl = arrayEl->FirstChildElement();while (childEl){CCLOG("child el is = %s", childEl->GetText());childEl = childEl->NextSiblingElement();}}

读取和生成json

#include "json/rapidjson.h"#include "json/document.h"#include "json/writer.h"#include "json/stringbuffer.h"

例子：

void ReadAndWriteJsonScene::readJson(){std::string name = "testJson.json";rapidjson::Document doc;if (!FileUtils::getInstance()->isFileExist(name)){CCLOG("file is not exist");return;}std::string data = FileUtils::getInstance()->getStringFromFile(name);doc.Parse<rapidjson::kParseDefaultFlags>(data.c_str());if (doc.HasParseError() || !doc.IsArray()){return;}for (auto i = 0; i<doc.Size(); i++){rapidjson::Value &v = doc[i];std::string name;int age;std::string sex;if (v.HasMember("name")){name = v["name"].GetString();auto len = v["name"].GetStringLength();CCLOG("name is %s, len is %d", name.c_str(), len);}}}void ReadAndWriteJsonScene::writeJson(){rapidjson::Document doc;doc.SetObject();rapidjson::Document::AllocatorType &allocator = doc.GetAllocator();rapidjson::Value arr(rapidjson::kArrayType);rapidjson::Value obj(rapidjson::kObjectType);obj.AddMember("int", 1, allocator);obj.AddMember("double", 2.0, allocator);obj.AddMember("bool", true, allocator);obj.AddMember("hello", "xxxxx", allocator);arr.PushBack(obj, allocator);doc.AddMember("strX", "jsonTest", allocator);doc.AddMember("arr", arr, allocator);rapidjson::StringBuffer buffer;rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);doc.Accept(writer);CCLOG("buffer string = %s", buffer.GetString());}

测试的json文件[{"name":"cl","age":27,"sex":"M"},{"name":"cbsss","age":25,"sex":"W"},{"name":"gx","age":25,"sex":"M"},{"name":"hxl","age":27,"sex":"W"}]