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C++中rapidjson组装map和数组array的代码示例

时间：2021-07-27 12:15     来源/作者：stpeace

rapidjson组装map和数组array的代码示例

直接上码：

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#include <iostream>
#include <map>
// 请自己下载开源的rapidjson
#include "rapidjson/prettywriter.h"
#include "rapidjson/rapidjson.h"
#include "rapidjson/document.h"
#include "rapidjson/stringbuffer.h"
#include "rapidjson/writer.h"
#include "rapidjson/memorystream.h"
#include <sys/types.h>
#include <vector>
using namespace std;
using rapidjson::Document;
using rapidjson::StringBuffer;
using rapidjson::Writer;
using namespace rapidjson;
// 注意int和uint64_t
map<string, uint64_t> g_mChildInt;
map<string, string> g_mChildString;
string formJson(const map<string, int> &mInt, const map<string, string> &mString,
     const string &strChild="", const map<string, uint64_t> &mChildInt=g_mChildInt, const map<string, string> &mChildString=g_mChildString,
     const string &strChild2="", const map<string, uint64_t> &mChildInt2=g_mChildInt, const map<string, string> &mChildString2=g_mChildString)
{
 Document document;
  Document::AllocatorType& allocator = document.GetAllocator();
  Value root(kObjectType);
  Value key(kStringType);
  Value value(kStringType);
 // 当前级别
 for(map<string, int>::const_iterator it = mInt.begin(); it != mInt.end(); ++it)
 {
 key.SetString(it->first.c_str(), allocator);
   root.AddMember(key, it->second, allocator);
 }
 for(map<string, string>::const_iterator it = mString.begin(); it != mString.end(); ++it)
 {
 key.SetString(it->first.c_str(), allocator);
   value.SetString(it->second.c_str(), allocator);
   root.AddMember(key, value, allocator);
 }
 // 孩子级别
 if(!strChild.empty())
 {
 Value child(kObjectType);
 for(map<string, uint64_t>::const_iterator it = mChildInt.begin(); it != mChildInt.end(); ++it)
 {
  key.SetString(it->first.c_str(), allocator);
   child.AddMember(key, it->second, allocator);
 }
 for(map<string, string>::const_iterator it = mChildString.begin(); it != mChildString.end(); ++it)
 {
  key.SetString(it->first.c_str(), allocator);
   value.SetString(it->second.c_str(), allocator);
   child.AddMember(key, value, allocator);
 }
 key.SetString(strChild.c_str(), allocator);
 root.AddMember(key, child, allocator);
 }
 // 孩子级别
 if(!strChild2.empty())
 {
 Value child(kObjectType);
 for(map<string, uint64_t>::const_iterator it = mChildInt2.begin(); it != mChildInt2.end(); ++it)
 {
  key.SetString(it->first.c_str(), allocator);
   child.AddMember(key, it->second, allocator);
 }
 for(map<string, string>::const_iterator it = mChildString2.begin(); it != mChildString2.end(); ++it)
 {
  key.SetString(it->first.c_str(), allocator);
   value.SetString(it->second.c_str(), allocator);
   child.AddMember(key, value, allocator);
 }
 key.SetString(strChild2.c_str(), allocator);
 root.AddMember(key, child, allocator);
 }
  StringBuffer buffer;
  Writer<StringBuffer> writer(buffer);
  root.Accept(writer);
  return buffer.GetString();
}
string formJsonWithArray(const map<string, int> &mInt, const map<string, string> &mString,
  const string &strChild1, const map<string, uint64_t> &mChildInt, const map<string, string> &mChildString,
     string &strChild2, vector<map<string, uint64_t> >&mVecChildInt, vector<map<string, string> >&mVecChildString)
{
 Document document;
  Document::AllocatorType& allocator = document.GetAllocator();
  Value root(kObjectType);
  Value key(kStringType);
  Value value(kStringType);
 // 当前级别
 for(map<string, int>::const_iterator it = mInt.begin(); it != mInt.end(); ++it)
 {
 key.SetString(it->first.c_str(), allocator);
   root.AddMember(key, it->second, allocator);
 }
 for(map<string, string>::const_iterator it = mString.begin(); it != mString.end(); ++it)
 {
 key.SetString(it->first.c_str(), allocator);
   value.SetString(it->second.c_str(), allocator);
   root.AddMember(key, value, allocator);
 }
 // 孩子级别
 if(!strChild1.empty())
 {
 Value child(kObjectType);
 for(map<string, uint64_t>::const_iterator it = mChildInt.begin(); it != mChildInt.end(); ++it)
 {
  key.SetString(it->first.c_str(), allocator);
   child.AddMember(key, it->second, allocator);
 }
 for(map<string, string>::const_iterator it = mChildString.begin(); it != mChildString.end(); ++it)
 {
  key.SetString(it->first.c_str(), allocator);
   value.SetString(it->second.c_str(), allocator);
   child.AddMember(key, value, allocator);
 }
 key.SetString(strChild1.c_str(), allocator);
 root.AddMember(key, child, allocator);
 }
 // 孩子级别
 unsigned int uiSize1 = mVecChildInt.size();
 unsigned int uiSize2 = mVecChildString.size();
 if(!strChild2.empty() && uiSize1 == uiSize2)
 {
 Value array(rapidjson::kArrayType);
 for(unsigned int i = 0; i < uiSize1; ++i)
 {
  Value child(kObjectType);
  for(map<string, uint64_t>::iterator it = mVecChildInt[i].begin(); it != mVecChildInt[i].end(); ++it)
  {
  key.SetString(it->first.c_str(), allocator);
    child.AddMember(key, it->second, allocator);
  }
  for(map<string, string>::iterator it = mVecChildString[i].begin(); it != mVecChildString[i].end(); ++it)
  {
  key.SetString(it->first.c_str(), allocator);
    value.SetString(it->second.c_str(), allocator);
    child.AddMember(key, value, allocator);
  }
  array.PushBack(child, allocator);
 }
 key.SetString(strChild2.c_str(), allocator);
 root.AddMember(key, array, allocator);
 }
  StringBuffer buffer;
  Writer<StringBuffer> writer(buffer);
  root.Accept(writer);
  return buffer.GetString();
}
void test1()
{
 map<string, int> mInt;
 map<string, string> mString;
 mInt["code"] = 0;
 mString["msg"] = "ok";
 string strChild1 = "xxx";
 map<string, uint64_t> mChildInt1;
 map<string, string> mChildString1;
 mChildInt1["key"] = 729;
 mChildString1["kk"] = "vv";
 string strChild2 = "yyy";
 map<string, uint64_t> mChildInt2;
 map<string, string> mChildString2;
 mChildInt2["key"] = 730;
 mChildString2["kkk"] = "vvv";
 string s = formJson(mInt, mString, strChild1, mChildInt1, mChildString1,strChild2, mChildInt2, mChildString2);
 cout << s << endl;
}
void test2()
{
 map<string, int> mInt;
 map<string, string> mString;
 mInt["code"] = 0;
 mString["msg"] = "ok";
 string strChild1 = "xxx";
 map<string, uint64_t> mChildInt;
 map<string, string> mChildString;
 mChildString["kk"] = "vv";
 mChildInt["key"] = 729;
 string strChild2 = "data";
 vector<map<string, uint64_t> >mVecChildInt;
 vector<map<string, string> >mVecChildString;
 {
 map<string, uint64_t> mChildInt;
 map<string, string> mChildString;
 mChildInt["id"] = 1;
 mChildString["path"] = "pa";
 mChildString["sha"] = "sh";
 mVecChildInt.push_back(mChildInt);
 mVecChildString.push_back(mChildString);
 }
 {
 map<string, uint64_t> mChildInt;
 map<string, string> mChildString;
 mChildInt["id"] = 2;
 mChildString["path"] = "pa";
 mChildString["sha"] = "sh";
 mVecChildInt.push_back(mChildInt);
 mVecChildString.push_back(mChildString);
 }
 string s = formJsonWithArray(mInt, mString, strChild1, mChildInt, mChildString, strChild2, mVecChildInt, mVecChildString);
 cout << s << endl;
}
int main(int argc, char *argv[])
{
 test1();
 test2();
 return 0;
}

结果：

{"code":0,"msg":"ok","xxx":{"key":729,"kk":"vv"},"yyy":{"key":730,"kkk":"vvv"}}
{"code":0,"msg":"ok","xxx":{"key":729,"kk":"vv"},"data":[{"id":1,"path":"pa","sha":"sh"},{"id":2,"path":"pa","sha":"sh"}]}

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标签：
C++ array Map rapidjson 

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