rapidjson代码封装类

rapidjson代码封装类

　　以下代码封装了rapidjson增删改查等基本操作:

 /************************************************************************/
 /*  CRJSONWrapper,简单封装rapidjson的一些操作 [6/22/2017 by whg]        */
 /*  部分代码待调试            [6/23/2017 by whg]                          */
 /************************************************************************/
 #pragma once
 #ifndef WHG_RJSON_WRAPPER
 #define WHG_RJSON_WRAPPER
 #include <iostream>
 #include <windows.h>
 #include <string>
 #include <fstream>
 #include "document.h"
 #include "writer.h"
 #include "stringbuffer.h"
 #include "filereadstream.h"
 #include "filewritestream.h"

 using namespace rapidjson;
 using namespace std;
 #define RJSON

 #ifndef RJSON_NEW_RETURN
 #define RJSON_NEW_RETURN(pt,classname,ret_val) \
     do{ pt = new classname;\
         if(pt == ) {return ret_val;}\
     } while ();
 #endif

 typedef Value::ConstMemberIterator RJSON_ValueMemberIter;
 typedef Value::ConstValueIterator  RJSON_ValueArrayIter;

 class CRJSONWrapper
 {
 public:
     /*    ReadJsonFromFile,本地目录读取json文件，返回读取状态
      *  ret：    操作状态
      *    in：    输入本地路径
      *    out：    输出rapidjson的doc
      */
     static bool ReadDocFromFile(__in const char* filepath,__out rapidjson::Document& doc)
     {
         std::ifstream infile(filepath);
         if (infile)
         {
             std::string str,temp;
             while (getline(infile,temp))
                 str += temp;
             infile.close();
             rapidjson::StringStream buf(str.c_str());
             doc.ParseStream(buf);
             return true;
         }
         return false;
     }
 #define RJSON_READ_DOC_FROM_FILE(filepath,doc) CRJSONWrapper::ReadDocFromFile(filepath,doc)

     /*    ReadJsonFromString,string读取json文件，返回读取状态
      *  ret：    操作状态
      *    in：    输入本地路径
      *    out：    输出rapidjson的doc
      */
     static bool ReadDocFromString(__in const std::string& strIn,__out rapidjson::Document& doc)
     {
         if (strIn.empty())
             return false;
         doc.Parse(strIn.c_str());
         return true;
     }
 #define RJSON_READ_DOC_FROM_STRING(strIn,doc) CRJSONWrapper::ReadDocFromString(strIn,doc)

     /*    WriteDocToString,doc转成string，返回操作状态
      *  ret：    操作状态
      *    in：    输入本地路径
      *    out：    输出rapidjson的doc
      */
     static bool WriteDocToFile(__in const rapidjson::Document& doc,__in const std::string& strFilePath)
     {
         StringBuffer buffer;
         rapidjson::Writer<StringBuffer> writer(buffer);
         doc.Accept(writer);
         std::string strJson(buffer.GetString(), buffer.GetSize());
         std::ofstream outfile;
         outfile.open(strFilePath.c_str());
         if (outfile.fail())
             return false;
         outfile << strJson;
         outfile.close();
         return true;
     }
 #define RJSON_WRITE_VALUE_TO_FILE(value,strFilePath) CRJSONWrapper::WriteDocToFile((Document&)value,strFilePath)

     /*    WriteDocToString,doc转成string，返回操作状态
      *  ret：    操作状态
      *    in：    输入本地路径
      *    out：    输出rapidjson的doc
      */
     static bool WriteDocToString(__in const rapidjson::Document& doc,__out std::string& strOut)
     {
         StringBuffer buffer;
         rapidjson::Writer<StringBuffer> writer(buffer);
         doc.Accept(writer);
         strOut = buffer.GetString();
         return true;
     }
 #define RJSON_WRITE_DOC_TO_STRING(value,strOut) CRJSONWrapper::WriteDocToString((Document&)value,strOut)

     // 定义document [6/23/2017 by whg]
 #define RJSON_DOC(doc)    rapidjson::Document doc;

     //  定义Value，type如kArrayType等[6/23/2017 by whg]
 #define RJSON_VALUE(value,valuetype) Value value(valuetype);

     //  从Document获取allocator[6/23/2017 by whg]
 #define RJSON_DOC_GET_ALLOC(doc,ALLOC) Document::AllocatorType& ALLOC = doc.GetAllocator();

     // 从VALUE中获取member的value [7/13/2017 by whg]
 #define RJSON_VALUE_GET_MEMBER_STRING(value,memName,memValue)    \
     if (value.IsObject())\
     {\
         if (value.HasMember(memName) && value[memName].IsInt())\
         {\
             int id = value[memName].GetInt();\
             char ch[]={};\
             sprintf_s(ch,"%d",id);\
             memValue = std::string(ch);\
         }\
         else if (value.HasMember(memName) && value[memName].IsString())\
         {\
             memValue = value[memName].GetString();\
         }\
     }

     // 从value中获取object对象[8/10/2017 by whg]
 #define RJSON_VALUE_GET_OBJECT_MEMBER(father,memName,child)    \
     if (father.IsObject())\
     {\
         if (father.HasMember(memName) && father[memName].IsObject())\
         {\
             child = father[memName];\
         }\
     }

     // 从value中获取array对象[8/10/2017 by whg]
 #define RJSON_VALUE_GET_ARRAY_MEMBER(father,memName,child)    \
     if (father.IsObject())\
     {\
         if (father.HasMember(memName) && father[memName].IsArray())\
         {\
             child = father[memName];\
         }\
     }

     /*    rapidjson-增操作*/
     // 为Document增加成员 [6/23/2017 by whg]
 #define RJSON_DOC_ADD_STRING_MEMBER(doc,strKEY,strVALUE) doc.AddMember(Value(strKEY, doc.GetAllocator()).Move(), Value(strVALUE, doc.GetAllocator()).Move(), doc.GetAllocator());

     // 为value增加成员 [6/23/2017 by whg]
 #define RJSON_VALUE_ADD_STRING_MEMBER(value,strKEY,strVALUE,ALLOC) value.AddMember(Value(strKEY, ALLOC).Move(), Value(strVALUE, ALLOC).Move(), ALLOC);

     // 为Document增加Value [6/23/2017 by whg]
 #define RJSON_DOC_ADD_VALUE(doc,strKEY,value) doc.AddMember(strKEY, value, doc.GetAllocator());

     // 为Value增加成员 [6/23/2017 by whg]
 #define RJSON_VALUE_ADD_STRING_MEMBER(value,strKEY,strVALUE,ALLOC) value.AddMember(Value(strKEY, ALLOC).Move(), Value(strVALUE, ALLOC).Move(), ALLOC);

     // 为Document增加Value [6/23/2017 by whg]
 #define RJSON_VALUE_ADD_VALUE(father,strKEY,child,ALLOC) father.AddMember(strKEY, child, ALLOC);

     // 为类型为Array的Value增加成员 [6/23/2017 by whg]
 #define RJSON_ARRAY_ADD_VALUE(array,value,ALLOC)    if(array.IsArray()){array.PushBack(value, ALLOC);}

     //  value的member迭代操作[6/23/2017 by whg]
 #define RJSON_ITER_MEMBER_BEGIN(value,mem_iter) for(RJSON_ValueMemberIter mem_iter=value.MemberBegin();mem_iter!=value.MemberEnd();mem_iter++)\
         {
 #define RJSON_ITER_MEMBER_END \
         }

     // 获取迭代器mem_iter的name，所有name都是string [6/23/2017 by whg]
 #define RJSON_ITER_MEMBER_GETNAME(mem_iter,strName) {strName = mem_iter->name.GetString();}

     // 获取迭代器mem_iter的value，所有name都是string [6/23/2017 by whg]
 #define RJSON_ITER_MEMBER_GETSTRVALUE(mem_iter,strValue) if(mem_iter->value.IsString()){\
         strValue = mem_iter->value.GetString();}

     //  数组value的iterator迭代操作[6/23/2017 by whg]
 #define RJSON_ITER_ARRAY_BEGIN(value,array_iter) for (RJSON_ValueArrayIter array_iter=value.Begin();array_iter!=value.End();array_iter++)\
         {
 #define RJSON_ITER_ARRAY_End\
         }

     // 根据数组项的name取出数组为string类型的值 [6/23/2017 by whg]
 #define RJSON_VALUE_GET_STRVALUE(value,strName,strValue) if (value.HasMember(strName) && value[strName].IsString()){\
         strValue = value[strName].GetString();}

     //  object删除member成员[6/23/2017 by whg]
 #define RJSON_REMOVE_MEMBER(value,strMemName) if (value.IsObject() && value.HasMember(std::string(strMemName).c_str())){\
     value.RemoveMember(std::string(strMemName).c_str());}

     /*    DeleteArrayItem,元素为object的array，删除含有指定name和value的对应object，返回操作状态
      *  ret：    操作状态
      *    in：    元素为object的array，member的name和value（string类型)，删除所有查找到的object还是删除第一次
      */
     //  未能实现删除所有相关元素，待测试[6/23/2017 by whg]
     static bool DeleteArrayItem(__in const rapidjson::Value& value,__in std::string strKey,__in std::string strValue,__in bool bOnlyFirst = true)
     {
         if (!value.IsArray())
             return false;
         //查找操作
         RJSON_ITER_ARRAY_BEGIN(value,iterObject)
         {
             RJSON_ITER_MEMBER_BEGIN((*iterObject),iterMem)
             {
                 string strname,strvalue;
                 RJSON_ITER_MEMBER_GETNAME(iterMem,strname);
                 RJSON_ITER_MEMBER_GETSTRVALUE(iterMem,strvalue);
                 //RJSON_DOC_REMOVE_MEMBER((*iter2),strname);
                 if (strname.compare(strKey) ==   && strvalue.compare(strValue) == )
                 {
                     Value& v = const_cast<Value&>(value);
                     if (iterObject != v.End()+)
                     {
                         iterObject = v.Erase(iterObject);
                     }
                     else
                         v.Erase(iterObject);

                     if (bOnlyFirst)
                         return true;
                     break;
                 }
             }
             RJSON_ITER_MEMBER_END
         }
         RJSON_ITER_ARRAY_End
             return true;
     }
 #define RJSON_ARRAY_REMOVE_OBJECT(value,strKey,strValue) CRJSONWrapper::DeleteArrayItem(value,strKey,strValue)
 };
 #endif

　　增删改查操作：

　　增操作的一个例子：

 　　std::string res;
     RJSON_DOC(doc);
     RJSON_DOC_GET_ALLOC(doc,alloc);
     doc.SetObject();
     RJSON_DOC_ADD_MEMBER(doc,"type","config");
     // 添加data节点 [8/8/2017 by whg]
     RJSON_VALUE(data,kObjectType);
     // data下添加music节点 [8/8/2017 by whg]
     RJSON_VALUE(music,kObjectType);
     RJSON_VALUE_ADD_MEMBER(music,"vo","",alloc);
     RJSON_VALUE_ADD_MEMBER(music,"si","",alloc);
     RJSON_VALUE_ADD_VALUE(data,"mu",music,alloc);
     // data下添加percent节点 [8/8/2017 by whg]
     RJSON_VALUE(percent,kObjectType);
     RJSON_VALUE_ADD_MEMBER(percent,"volume","",alloc);
     RJSON_VALUE_ADD_VALUE(data,"percent",percent,alloc);
     // data下添加audio节点 [8/8/2017 by whg]
     RJSON_VALUE(audio,kObjectType);
     RJSON_VALUE_ADD_MEMBER(audio,"volume","",alloc);
     RJSON_VALUE_ADD_VALUE(data,"audio",audio,alloc);
     // doc下添加sp_data节点 [8/8/2017 by whg]
     RJSON_DOC_ADD_VALUE(doc,"sp_data",data);
     RJSON_WRITE_DOC_TO_STRING(doc,res);