一、说明
我在这里得到的只是一个简单的定义string和Int种类,其他数据类型可以被替换向上。
两、头文件
class JsonReadUtils { public: static JsonReadUtils* getInstance(); const std::string getStringFromeFile(const std::string &fileName); const std::string getStringFromeJson(const std::string jsonStr,const std::string key); const std::string getStringFromeJson(const std::string jsonStr,const std::string key1,const std::string key2); int getIntFromeJson(const std::string jsonStr,const std::string key); int getIntFromeJson(const std::string jsonStr,const std::string key1,const std::string key2); unsigned getSizeFromeJsonArr(const std::string jsonArr); JsonReadUtils(); private: ~JsonReadUtils(void); };
三、源文件
#include "JsonUtils.h" #define RETURN_IF(cond,p) if((cond)) return (p) static JsonReadUtils* mUtils = nullptr; JsonReadUtils::JsonReadUtils() { } JsonReadUtils::~JsonReadUtils(void) { CC_SAFE_DELETE(mUtils); } JsonReadUtils* JsonReadUtils::getInstance() { if (NULL==mUtils) { mUtils = new JsonReadUtils(); } return mUtils; } const std::string JsonReadUtils::getStringFromeFile( const std::string &fileName) { const std::string mstr = cocos2d::FileUtils::getInstance()->getStringFromFile(fileName); return mstr; } const std::string JsonReadUtils::getStringFromeJson( const std::string jsonStr,const std::string key ) { rapidjson::Document _mDoc; std::string mstr = jsonStr; RETURN_IF(NULL==mstr.c_str()||!mstr.compare(""),""); _mDoc.Parse<rapidjson::kParseDefaultFlags>(mstr.c_str()); RETURN_IF(_mDoc.HasParseError()||!_mDoc.IsObject()||!_mDoc.HasMember(key.c_str()),""); const rapidjson::Value &pArr = _mDoc[key.c_str()]; RETURN_IF(!pArr.IsString(),""); const std::string mm = pArr.GetString(); return mm; } const std::string JsonReadUtils::getStringFromeJson( const std::string jsonStr,const std::string key1,const std::string key2 ) { rapidjson::Document _mDoc; std::string mstr = jsonStr; RETURN_IF(NULL==mstr.c_str()||!mstr.compare(""),""); _mDoc.Parse<rapidjson::kParseDefaultFlags>(mstr.c_str()); RETURN_IF(_mDoc.HasParseError()||!_mDoc.IsObject()||!_mDoc.HasMember(key1.c_str()),""); const rapidjson::Value &pArr = _mDoc[key1.c_str()]; RETURN_IF(!pArr.IsObject(),""); const rapidjson::Value &p = pArr[key2.c_str()]; RETURN_IF(!p.IsString(),""); const std::string vvv =p.GetString(); return vvv; } int JsonReadUtils::getIntFromeJson( const std::string jsonStr,const std::string key ) { rapidjson::Document _mDoc; std::string mstr = jsonStr; RETURN_IF(NULL==mstr.c_str()||!mstr.compare(""),NULL); _mDoc.Parse<rapidjson::kParseDefaultFlags>(mstr.c_str()); RETURN_IF(_mDoc.HasParseError()||!_mDoc.IsObject()||!_mDoc.HasMember(key.c_str()),NULL); const rapidjson::Value &pArr = _mDoc[key.c_str()]; RETURN_IF(!pArr.IsInt(),NULL); int mm = pArr.GetInt(); return mm; } int JsonReadUtils::getIntFromeJson( const std::string jsonStr,const std::string key1,const std::string key2 ) { rapidjson::Document _mDoc; std::string mstr = jsonStr; RETURN_IF(NULL==mstr.c_str()||!mstr.compare(""),NULL); _mDoc.Parse<rapidjson::kParseDefaultFlags>(mstr.c_str()); RETURN_IF(_mDoc.HasParseError()||!_mDoc.IsObject()||!_mDoc.HasMember(key1.c_str()),NULL); const rapidjson::Value &pArr = _mDoc[key1.c_str()]; RETURN_IF(!pArr.IsObject(),NULL); const rapidjson::Value &p = pArr[key2.c_str()]; RETURN_IF(!p.IsInt(),NULL); int vvv =p.GetInt(); return vvv; } unsigned JsonReadUtils::getSizeFromeJsonArr( const std::string jsonArr ) { rapidjson::Document _mDoc; std::string mstr = jsonArr; RETURN_IF(NULL==mstr.c_str()||!mstr.compare(""),NULL); _mDoc.Parse<rapidjson::kParseDefaultFlags>(mstr.c_str()); RETURN_IF(_mDoc.HasParseError()||!_mDoc.IsObject(),NULL); const rapidjson::Value &mValue = _mDoc; RETURN_IF(!mValue.IsArray(),NULL); unsigned count = 0; unsigned mm = mValue.Capacity(); return mm; }
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