rapidjson读写方法总结

这个写的有些复杂，包含太多方法了。其实我真正在项目里用的是自己简化的版本，不过都是基于这个版本修改的。
.h 文件

//*******************************// Json Parse// Created by Simon on 10/29/2015//*******************************#ifndef _JSON_UTILS_H_#define  _JSON_UTILS_H_#include <iostream>#include <string>#include "json/rapidjson.h"#include "json/document.h"#include "json/writer.h"#include "json/stringbuffer.h"#include "json/prettywriter.h"#include "cocos2d.h"using namespace std;using namespace rapidjson;USING_NS_CC;// Basic Check;#define json_check_is_bool(value, strKey) (value.HasMember(strKey) && value[strKey].IsBool())#define json_check_is_string(value, strKey) (value.HasMember(strKey) && value[strKey].IsString())#define json_check_is_int32(value, strKey) (value.HasMember(strKey) && value[strKey].IsInt())#define json_check_is_uint32(value, strKey) (value.HasMember(strKey) && value[strKey].IsUint())#define json_check_is_int64(value, strKey) (value.HasMember(strKey) && value[strKey].IsInt64())#define json_check_is_uint64(value, strKey) (value.HasMember(strKey) && value[strKey].IsUint64())#define json_check_is_double(value, strKey) (value.HasMember(strKey) && value[strKey].IsDouble())#define json_check_is_number(value, strKey) (value.HasMember(strKey) && value[strKey].IsNumber())#define json_check_is_array(value, strKey) (value.HasMember(strKey) && value[strKey].IsArray())#define json_check_is_object(value, strKey) (value.HasMember(strKey) && value[strKey].IsObject())// Utils Method;#if (0)    // 1 Myself Debug Modeinline void String_Check_Null(string _String_, string _Method_) { if (_String_ == "") MessageBox(StringUtils::format("Has null string In %s", _Method_).c_str(), "HasParseError"); }inline void File_Not_Exist(const char* _File_, const char* _Method_) {MessageBox(StringUtils::format("CODE-ERROR %s Does Not Exist, then create this, Method = %s", _File_, _Method_).c_str(), "File does not exist");}#elseinline void String_Check_Null(string _String_, const char* _Method_) { if (_String_ == "") CCLOG(StringUtils::format("Has null string In %s, HasParseError", _Method_).c_str()); }inline void File_Not_Exist(const char* _File_, const char* _Method_) { CCLOG(StringUtils::format("CODE-ERROR %s Does Not Exist, then create this, Method = %s ", _File_, _Method_).c_str()); }inline void DefaultFile(string _File_) { CCLOG("Platform Default Path = %s", _File_.c_str()); }#endif// File Path;const string _USER_ = "user.json";const string _TEST_ = "test.json";const string REF_PATH = "data/";const int ENCRYPTION = 0;class JsonUtils : public Ref{private:JsonUtils();~JsonUtils();static JsonUtils* _self;map<std::string, rapidjson::Document*> _docBuffer;public:static JsonUtils* getInstance();void deleteInstance();//-----------UserData-Method-Begin-----------;// Type 1 : writable path, Type : 0 resource path;void loadJson(string filename, bool isWritable = true);void parseJson(string filename, string jsonBuffer);void writeJson(string filename);    void setValue(string filename, string key, rapidjson::Value& value, bool save = false);void saveJson(rapidjson::Document* doc, const std::string &fileName, bool prettyFlag = true, bool Asynchronous = false);    void saveJson(const std::string& filename, bool prettyFlag = true, bool Asynchronous = false);    void unloadJson(string filename);void setIntegerForKey(string key, int value, string filename, bool save = false);int getIntegerForKey(string key, string filename);    void setBooleanForKey(string key, bool value, string filename, bool save = false);bool getBooleanForKey(string key, string filename);    void setDoubleForKey(string key, float value, string filename, bool save = false);float getDoubleForKey(string key, string filename);    void setStringForKey(string key, string value, string filename, bool save = false);string getStringForKey(string key, string filename);rapidjson::Document* getDoc(string filename);    rapidjson::Value& getValue(string filename, string key);    void testCode();//--------------UserData-Method-End-------------};#endif  //_JSON_UTILS_H_//_EOF_/.--- ... --- -. ..- - .. .-.. ... .-.-.- ..../

.cpp文件

//*******************************// Json Parse// Created on 10/29/2015//*******************************#include "JsonUtils.h"JsonUtils* JsonUtils::_self = nullptr;JsonUtils::JsonUtils(){_docBuffer.clear();}JsonUtils::~JsonUtils(){}JsonUtils* JsonUtils::getInstance(){if (!_self){_self = new JsonUtils();}return _self;}void JsonUtils::deleteInstance(){if (_self){delete(_self);}_self = nullptr;}void JsonUtils::loadJson(string filename, bool isWritable){    string path = "";    if (isWritable){        path = FileUtils::getInstance()->getWritablePath().append(filename);assert(path!="");}else{        path = REF_PATH + filename;}if (!FileUtils::getInstance()->isFileExist(path)){        File_Not_Exist(filename.c_str(), "JsonUtils::loadJson");writeJson(filename);}string jsonBuffer = FileUtils::getInstance()->getStringFromFile(path);assert(jsonBuffer != "");parseJson(filename, jsonBuffer);}void JsonUtils::parseJson(string filename, string jsonBuffer){rapidjson::Document* doc = new rapidjson::Document();doc->Parse<rapidjson::kParseDefaultFlags>(jsonBuffer.c_str());assert(doc->IsObject());_docBuffer[filename] = doc;}void JsonUtils::writeJson(string filename){string value = filename + " data";rapidjson::Document* doc = new rapidjson::Document();rapidjson::Document::AllocatorType& allocator = doc->GetAllocator();doc->SetObject();doc->AddMember("description", StringRef(value.c_str()), allocator);saveJson(doc, filename);}void JsonUtils::setValue(string filename, string key, rapidjson::Value& value, bool save){rapidjson::Document* doc = _docBuffer[filename];rapidjson::Document::AllocatorType& allocator = doc->GetAllocator();assert(doc->IsObject());rapidjson::Value& var = *doc;if (doc->HasMember(key.c_str())){var[key.c_str()] = value;        if (save)            saveJson(doc, filename);}else{doc->AddMember(StringRef(key.c_str()), value, allocator);        saveJson(doc, filename);        string name = filename + ".json";        string jsonBuffer = FileUtils::getInstance()->getStringFromFile(FileUtils::getInstance()->getWritablePath().append(name));        assert(jsonBuffer != "");        parseJson(filename, jsonBuffer);}}void JsonUtils::saveJson(rapidjson::Document* doc, const std::string &fileName, bool prettyFlag, bool Asynchronous){StringBuffer buffer;buffer.Clear();if (prettyFlag){rapidjson::PrettyWriter<rapidjson::StringBuffer> writer(buffer);//writer.SetIndent(' ', 2);        doc->Accept(writer);}else{rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);doc->Accept(writer);}std::function<void(std::string, std::string)> saveHandler = [](std::string str, std::string fName){#if ENCRYPTIONstd::string tag = fName;for (int i = 0; i < str.size(); i++)str[i] ^= tag[i % tag.size()];#endif        std::string filepath = FileUtils::getInstance()->getWritablePath().append(fName);FILE *fp = fopen(filepath.c_str(), "wb");//fputs(str.c_str(), fp);fwrite(str.c_str(), 1, str.size(), fp);#if ENCRYPTIONstring tagStr = tag;for (int i = 0; i < tag.size(); i++)tagStr[i] ^= tag[tag.size() - 1 - i];fwrite(tagStr.c_str(), 1, tagStr.size(), fp);#endiffclose(fp);};if (Asynchronous){std::thread save(saveHandler, std::string(buffer.GetString(), buffer.GetSize()), fileName);save.detach();}else{saveHandler(std::string(buffer.GetString(), buffer.GetSize()), fileName);}}void JsonUtils::saveJson(const std::string& filename, bool prettyFlag /*= true*/, bool Asynchronous /*= false*/){    saveJson(_docBuffer[filename], filename, prettyFlag, Asynchronous);}void JsonUtils::unloadJson(string filename){map<string, rapidjson::Document*>::iterator iter;    iter = _docBuffer.find(filename);if (iter != _docBuffer.end()){_docBuffer.erase(iter);}}void JsonUtils::setIntegerForKey(string key, int value, string filename, bool save){rapidjson::Document* doc = _docBuffer[filename];rapidjson::Document::AllocatorType& allocator = doc->GetAllocator();if (json_check_is_int32((*doc), key.c_str())){(*doc)[key.c_str()].SetInt(value);        if (save)            saveJson(doc, filename);}else{doc->AddMember(StringRef(key.c_str()), value, allocator);        saveJson(doc, filename);        string name = filename + ".json";        string jsonBuffer = FileUtils::getInstance()->getStringFromFile(FileUtils::getInstance()->getWritablePath().append(name));        assert(jsonBuffer != "");        parseJson(filename, jsonBuffer);}}int JsonUtils::getIntegerForKey(string key, string filename){rapidjson::Document* doc = _docBuffer[filename];assert(doc);    if (json_check_is_int32((*doc), key.c_str())){return (*doc)[key.c_str()].GetInt();}return 0;}void JsonUtils::setBooleanForKey(string key, bool value, string filename, bool save){rapidjson::Document* doc = _docBuffer[filename];rapidjson::Document::AllocatorType& allocator = doc->GetAllocator();rapidjson::Value& var = *doc;if (json_check_is_bool(var, key.c_str())){var[key.c_str()].SetBool(value);        if (save)            saveJson(doc, filename);}else{doc->AddMember(StringRef(key.c_str()), value, allocator);        saveJson(doc, filename);        string name = filename + ".json";        string jsonBuffer = FileUtils::getInstance()->getStringFromFile(FileUtils::getInstance()->getWritablePath().append(name));        assert(jsonBuffer != "");        parseJson(filename, jsonBuffer);}}bool JsonUtils::getBooleanForKey(string key, string filename){if (_docBuffer[filename] && _docBuffer[filename]->HasMember(key.c_str())){return (*_docBuffer[filename])[key.c_str()].GetBool();}return false;}void JsonUtils::setDoubleForKey(string key, float value, string filename, bool save){rapidjson::Document* doc = _docBuffer[filename];rapidjson::Document::AllocatorType& allocator = doc->GetAllocator();rapidjson::Value& var = *doc;    string floatStr = __String::createWithFormat("%.2f", value)->getCString();    if (json_check_is_string(var, key.c_str())){        var[key.c_str()].SetString(StringRef(floatStr.c_str()), allocator);        if (save)            saveJson(doc, filename);}else{        doc->AddMember(StringRef(key.c_str()), StringRef(floatStr.c_str()), allocator);        saveJson(doc, filename);        string name = filename + ".json";        string jsonBuffer = FileUtils::getInstance()->getStringFromFile(FileUtils::getInstance()->getWritablePath().append(name));        assert(jsonBuffer != "");        parseJson(filename, jsonBuffer);}}float JsonUtils::getDoubleForKey(string key, string filename){if (_docBuffer[filename] && _docBuffer[filename]->HasMember(key.c_str())){return atof(((*_docBuffer[filename])[key.c_str()].GetString()));}return 0.0f;}void JsonUtils::setStringForKey(string key, string value, string filename, bool save){rapidjson::Document* doc = _docBuffer[filename];rapidjson::Document::AllocatorType& allocator = doc->GetAllocator();rapidjson::Value& var = *doc;if (json_check_is_string(var, key.c_str())){        var[key.c_str()].SetString(StringRef(value.c_str()), allocator);        if (save)            saveJson(doc, filename);}else{doc->AddMember(StringRef(key.c_str()), StringRef(value.c_str()), allocator);        saveJson(doc, filename);        string name = filename + ".json";        string jsonBuffer = FileUtils::getInstance()->getStringFromFile(FileUtils::getInstance()->getWritablePath().append(name));        assert(jsonBuffer != "");        parseJson(filename, jsonBuffer);}}std::string JsonUtils::getStringForKey(string key, string filename){if (_docBuffer[filename] && _docBuffer[filename]->HasMember(key.c_str())){return (*_docBuffer[filename])[key.c_str()].GetString();}return "";}rapidjson::Document* JsonUtils::getDoc(string filename){if (_docBuffer[filename]){return _docBuffer[filename];}    return nullptr;}rapidjson::Value& JsonUtils::getValue(string filename, string key){    if (_docBuffer[filename] && _docBuffer[filename]->HasMember(key.c_str()))    {        return (*_docBuffer[filename])[key.c_str()];    }}void JsonUtils::testCode(){    JsonUtils::getInstance()->loadJson(_USER_);    JsonUtils::getInstance()->loadJson(_TEST_);    int num = 100;    string key1 = "aaa";    string key2 = "bb";    string key3 = "c";    string key4 = "d";    JsonUtils::getInstance()->setIntegerForKey(key1, num, _USER_);    JsonUtils::getInstance()->setIntegerForKey(key1, num, _TEST_);    int temp = JsonUtils::getInstance()->getIntegerForKey(key1, _USER_);    int temp2 = JsonUtils::getInstance()->getIntegerForKey(key1, _TEST_);    CCLOG("%d  %d ", temp, temp2);    JsonUtils::getInstance()->setStringForKey(key4, "dddddddd", _USER_);    string temp9 = JsonUtils::getInstance()->getStringForKey(key4, _USER_);    CCLOG("%s", temp9.c_str());    JsonUtils::getInstance()->setStringForKey(key4, "ffffffff", _USER_);    string temo0 = JsonUtils::getInstance()->getStringForKey(key4, _USER_);    CCLOG("%s", temo0.c_str());    JsonUtils::getInstance()->setBooleanForKey(key2, true, _USER_);    JsonUtils::getInstance()->setBooleanForKey(key2, true, _TEST_);    bool temp32 = JsonUtils::getInstance()->getBooleanForKey(key2, _USER_);    bool temp3 = JsonUtils::getInstance()->getBooleanForKey(key2, _TEST_);        JsonUtils::getInstance()->setDoubleForKey(key3, 1.56f, _USER_);    double temp6 = JsonUtils::getInstance()->getDoubleForKey(key3, _USER_);    CCLOG("%f     ", temp6);    JsonUtils::getInstance()->saveJson(_USER_);    // Value Methods;    rapidjson::Value cache;    cache.SetInt(12220);    JsonUtils::getInstance()->setValue(_USER_, "qwer", cache);    cache.SetBool(false);    JsonUtils::getInstance()->setValue(_USER_, "bool", cache);    cache.SetDouble(1.9966f);    JsonUtils::getInstance()->setValue(_USER_, "float", cache);    cache.SetString("gggg");    JsonUtils::getInstance()->setValue(_USER_, "ConstString", cache);    string hello = "dd";    cache.SetString(StringRef(hello.c_str()));    JsonUtils::getInstance()->setValue(_USER_, "CopyString", cache);    rapidjson::Document* please = JsonUtils::getInstance()->getDoc(_USER_);    CCLOG("%s", (*please)["d"].GetString());    // Other Path Files;    JsonUtils::getInstance()->loadJson("data.json", false);    string data = JsonUtils::getInstance()->getStringForKey(key4, "data");    CCLOG("data from ref/data %s", data.c_str());}//_EOF_