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_tmap<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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