rapidjson對於json的序列化與反序列化
阿新 • • 發佈：2019-02-20
ica reg int arp 版權 carp 車輛 tint 生成
轉載：
https://blog.csdn.net/qq849635649/article/details/52678822
#include "rapidjson/stringbuffer.h"
#include "rapidjson/writer.h"
#include <iostream>
#include <string>
using namespace std;
void Serialize_1()
{
rapidjson::StringBuffer strBuf;
rapidjson::Writer<rapidjson::StringBuffer> writer(strBuf);
writer.StartObject();
//1. 整數類型
writer.Key("Int");
writer.Int(1);
//2. 浮點類型
writer.Key("Double");
writer.Double(12.0000001);
//3. 字符串類型
writer.Key("String");
writer.String("This is a string");
//4. 結構體類型
writer.Key("Object");
writer.StartObject();
writer.Key("name");
writer.String("qq849635649");
writer.Key("age");
writer.Int(25);
writer.EndObject();
//5. 數組類型
//5.1 整型數組
writer.Key("IntArray");
writer.StartArray();
//順序寫入即可
writer.Int(10);
writer.Int(20);
writer.Int(30);
writer.EndArray();
//5.2 浮點型數組
writer.Key("DoubleArray");
writer.StartArray();
for(int i = 1; i < 4; i++)
{
writer.Double(i * 1.0);
}
writer.EndArray();
//5.3 字符串數組
writer.Key("StringArray");
writer.StartArray();
writer.String("one");
writer.String("two");
writer.String("three");
writer.EndArray();
//5.4 混合型數組
//這說明了，一個json數組內容是不限制類型的
writer.Key("MixedArray");
writer.StartArray();
writer.String("one");
writer.Int(50);
writer.Bool(false);
writer.Double(12.005);
writer.EndArray();
//5.5 結構體數組
writer.Key("People");
writer.StartArray();
for(int i = 0; i < 3; i++)
{
writer.StartObject();
writer.Key("name");
writer.String("qq849635649");
writer.Key("age");
writer.Int(i * 10);
writer.Key("sex");
writer.Bool((i % 2) == 0);
writer.EndObject();
}
writer.EndArray();
writer.EndObject();
string data = strBuf.GetString();
cout << data << endl;
}
---------------------
作者：奮鬥-少年
來源：CSDN
原文：https://blog.csdn.net/qq849635649/article/details/52678822
版權聲明：本文為博主原創文章，轉載請附上博文鏈接！
解析：
void parse() {
//創建解析對象
rapidjson::Document doc;
//首先進行解析，沒有解析錯誤才能進行具體字段的解析
if(!doc.Parse(data.data()).HasParseError())
{
//1. 解析整數
if(doc.HasMember("Int") && doc["Int"].IsInt())
{
cout << "Int = " << doc["Int"].GetInt() << endl;
}
//2. 解析浮點型
if(doc.HasMember("Double") && doc["Double"].IsDouble())
{
cout << "Double = " << doc["Double"].GetDouble() << endl;
}
//3. 解析字符串
if(doc.HasMember("String") && doc["String"].IsString())
{
cout << "String = " << doc["String"].GetString() << endl;
}
//4. 解析結構體
if(doc.HasMember("Object") && doc["Object"].IsObject())
{
const rapidjson::Value& object = doc["Object"];
if(object.HasMember("name") && object["name"].IsString())
{
cout << "Object.name = " << object["name"].GetString() << endl;
}
if(object.HasMember("age") && object["age"].IsInt())
{
cout << "Object.age = " << object["age"].GetInt() << endl;
}
}
//5. 解析數組類型
//5.1 整型數組類型
if(doc.HasMember("IntArray") && doc["IntArray"].IsArray())
{
//5.1.1 將字段轉換成為rapidjson::Value類型
const rapidjson::Value& array = doc["IntArray"];
//5.1.2 獲取數組長度
size_t len = array.Size();
//5.1.3 根據下標遍歷，註意將元素轉換為相應類型，即需要調用GetInt()
for(size_t i = 0; i < len; i++)
{
cout << "IntArray[" << i << "] = " << array[i].GetInt() << endl;
}
}
//5.2 浮點型數組類型
if(doc.HasMember("DoubleArray") && doc["DoubleArray"].IsArray())
{
const rapidjson::Value& array = doc["DoubleArray"];
size_t len = array.Size();
for(size_t i = 0; i < len; i++)
{
//為防止類型不匹配，一般會添加類型校驗
if(array[i].IsDouble())
{
cout << "DoubleArray[" << i << "] = " << array[i].GetDouble() << endl;
}
}
}
//5.3 字符串數組類型
if(doc.HasMember("StringArray") && doc["StringArray"].IsArray())
{
const rapidjson::Value& array = doc["StringArray"];
size_t len = array.Size();
for(size_t i = 0; i < len; i++)
{
//為防止類型不匹配，一般會添加類型校驗
if(array[i].IsString())
{
cout << "StringArray[" << i << "] = " << array[i].GetString() << endl;
}
}
}
//5.4 混合型
if(doc.HasMember("MixedArray") && doc["MixedArray"].IsArray())
{
const rapidjson::Value& array = doc["MixedArray"];
size_t len = array.Size();
for(size_t i = 0; i < len; i++)
{
//為防止類型不匹配，一般會添加類型校驗
if(array[i].IsString())
{
cout << "MixedArray[" << i << "] = " << array[i].GetString() << endl;
}
else if(array[i].IsBool())
{
cout << "MixedArray[" << i << "] = " << array[i].GetBool() << endl;
}
else if(array[i].IsInt())
{
cout << "MixedArray[" << i << "] = " << array[i].GetInt() << endl;
}
else if(array[i].IsDouble())
{
cout << "MixedArray[" << i << "] = " << array[i].GetDouble() << endl;
}
}
}
//5.5 結構體數組類型
if(doc.HasMember("People") && doc["People"].IsArray())
{
const rapidjson::Value& array = doc["People"];
size_t len = array.Size();
for(size_t i = 0; i < len; i++)
{
const rapidjson::Value& object = array[i];
//為防止類型不匹配，一般會添加類型校驗
if(object.IsObject())
{
cout << "ObjectArray[" << i << "]: ";
if(object.HasMember("name") && object["name"].IsString())
{
cout << "name=" << object["name"].GetString();
}
if(object.HasMember("age") && object["age"].IsInt())
{
cout << ", age=" << object["age"].GetInt();
}
if(object.HasMember("sex") && object["sex"].IsBool())
{
cout << ", sex=" << (object["sex"].GetBool() ? "男" : "女") << endl;
}
}
}
}
}
/**
* 最後註意：因為rapidjson不會做安全校驗，所以要自己做安全校驗，以int整型為例
* “if(object.HasMember("age") && object["age"].IsInt()) {}”
* 這句校驗很重要，既要校驗有該子段，也要校驗類型正確，否則會引發程序崩潰
*/
}
---------------------
作者：奮鬥-少年
來源：CSDN
原文：https://blog.csdn.net/qq849635649/article/details/52678822
版權聲明：本文為博主原創文章，轉載請附上博文鏈接！
順便貼一下我自己的使用：
int Alg_VIR_application::saveAdnTransWhiteBoxTestInfo(sApplicationInput &applicationInput, sWhiteBoxTestInfo &whiteBoxTestInfo, std::string jsonTestInfo)
{
#ifdef SAVE_WHITE_BOX_TEST_INFO
if (!applicationInput.paramWhiteBoxTestOpenFlag)
return PROCESS_SUCCESS;
std::vector<cv::Point> vecPtShift = applicationInput.vecPtShift;
//將公共的信息從applicationInput中獲取並塞入至whiteBoxTestInfo中
whiteBoxTestInfo.recPlateNum = applicationInput.regPlateNum;
whiteBoxTestInfo.objLocation = applicationInput.car_location_res.objLocation;
whiteBoxTestInfo.vvPoliceManDetectionOutput = applicationInput.vvPoliceManDetectionOutput;
int CountobjLoc = MIN(whiteBoxTestInfo.objLocation.size(), vecPtShift.size());
int CountPoliceManDetection = MIN(whiteBoxTestInfo.vvPoliceManDetectionOutput.size(), vecPtShift.size());
int CountTrifficLight = MIN(whiteBoxTestInfo.ARLTestInfo.TrifficLight.objects.size(), vecPtShift.size());
//與違法類型相關的信息，在前面進行app內進行處理的時候已經塞值進去了，因此現在whiteBoxTestInfo中已經是全的值，可以進行json的轉換了
rapidjson::StringBuffer strBuf;
rapidjson::Writer<rapidjson::StringBuffer> writer(strBuf);
writer.StartObject();
//4. 結構體類型
writer.Key("recPlateNum");
writer.String(whiteBoxTestInfo.recPlateNum.c_str());
//5.5 結構體數組，寫目標車輛的位置
writer.Key("vvObjectLoc");
writer.StartObject();
for(int j = 0; j < CountobjLoc; j++)
{
writer.Key(("objectLocation" + std::to_string(j)).c_str());
writer.StartArray();
writer.Int(whiteBoxTestInfo.objLocation[j].x + vecPtShift[j].x);
writer.Int(whiteBoxTestInfo.objLocation[j].y + vecPtShift[j].y);
writer.Int(whiteBoxTestInfo.objLocation[j].width);
writer.Int(whiteBoxTestInfo.objLocation[j].height);
writer.EndArray();
}
writer.EndObject();
//5.5 結構體數組，寫交警的位置
writer.Key("vvPoliceManDetectionOutput");
writer.StartObject();
for(int i = 0; i < CountPoliceManDetection; i++)
{
writer.Key(("PoliceManDetection" + std::to_string(i)).c_str());
writer.StartArray();
for(int j = 0; j < whiteBoxTestInfo.vvPoliceManDetectionOutput[i].size(); j++)
{
if ( whiteBoxTestInfo.vvPoliceManDetectionOutput[i][j].policeStatus == PCLPolice)
{
writer.Int(whiteBoxTestInfo.vvPoliceManDetectionOutput[i][j].pedestrianLoc.x + vecPtShift[i].x);
writer.Int(whiteBoxTestInfo.vvPoliceManDetectionOutput[i][j].pedestrianLoc.y + vecPtShift[i].y);
writer.Int(whiteBoxTestInfo.vvPoliceManDetectionOutput[i][j].pedestrianLoc.width);
writer.Int(whiteBoxTestInfo.vvPoliceManDetectionOutput[i][j].pedestrianLoc.height);
}
}
writer.EndArray();
}
writer.EndObject();
//寫紅綠燈返回的結構體
writer.Key("sARLTestInfo");
writer.StartObject();
{
writer.Key("SingleTrifficLightState");
writer.StartObject();
if (whiteBoxTestInfo.ARLTestInfo.TrifficLight.objects.size() > 0)
{
for(int i = 0; i < CountTrifficLight; i++)
{
writer.Key(("SingleTrifficLightState" + std::to_string(i)).c_str());
writer.StartArray();
for(int j = 0; j < whiteBoxTestInfo.ARLTestInfo.TrifficLight.objects[i].size(); j++)
{
writer.Int(whiteBoxTestInfo.ARLTestInfo.TrifficLight.objects[i][j].lightRect.x + vecPtShift[i].x);
writer.Int(whiteBoxTestInfo.ARLTestInfo.TrifficLight.objects[i][j].lightRect.y + vecPtShift[i].y);
writer.Int(whiteBoxTestInfo.ARLTestInfo.TrifficLight.objects[i][j].lightRect.width);
writer.Int(whiteBoxTestInfo.ARLTestInfo.TrifficLight.objects[i][j].lightRect.height);
writer.Int(whiteBoxTestInfo.ARLTestInfo.TrifficLight.objects[i][j].lightClass);
}
writer.EndArray();
}
}
writer.EndObject();
{
writer.Key("WholeTrifficLightState");
writer.StartArray();
writer.Int(whiteBoxTestInfo.ARLTestInfo.TrifficLight.trafficLightState.sLeftState);
writer.Int(whiteBoxTestInfo.ARLTestInfo.TrifficLight.trafficLightState.sStraightState);
writer.Int(whiteBoxTestInfo.ARLTestInfo.TrifficLight.trafficLightState.sRightState);
writer.EndArray();
}
}
writer.Key("LaneDircetion");
writer.Int(whiteBoxTestInfo.ARLTestInfo.LaneDircetion);
writer.Key("CarDirection");
writer.Int(whiteBoxTestInfo.ARLTestInfo.CarDirection);
writer.EndObject();
//寫逆行返回的結構體
writer.Key("sRRTestInfo");
writer.StartObject();
writer.Key("LaneDircetion");
writer.Int(whiteBoxTestInfo.RRTestInfo.LaneDircetion);
writer.Key("CarPose");
writer.Int(whiteBoxTestInfo.RRTestInfo.CarPose);
writer.Key("CarDirection");
writer.Int(whiteBoxTestInfo.RRTestInfo.CarDirection);
writer.Key("reverseLaneProportion");
writer.Double(whiteBoxTestInfo.RRTestInfo.reverseLaneProportion);
writer.Key("overStopLineProportion");
writer.Double(whiteBoxTestInfo.RRTestInfo.overStopLineProportion);
writer.EndObject();
//寫違反導向返回的結構體
writer.Key("sADTestInfo");
writer.StartObject();
writer.Key("LaneDircetion");
writer.Int(whiteBoxTestInfo.RRTestInfo.LaneDircetion);
writer.Key("CarPose");
writer.Int(whiteBoxTestInfo.RRTestInfo.CarPose);
writer.EndObject();
//寫壓線返回的結構體
writer.Key("sCLALTestInfo");
writer.StartObject();
writer.Key("CarBodyRate");
writer.Double(whiteBoxTestInfo.CLALTestInfo.CarBodyRate);
writer.EndObject();
writer.EndObject();
string json = strBuf.GetString();
std::ofstream fout;
std::string root_path = "/media/tmp/test/";
fout.open(root_path + "11111.json");
fout << json << std::endl;
fout.close();
#endif
}
生成的json如下：
{
"recPlateNum":"浙G7FQ66",
"vvObjectLoc":{
"objectLocation0":[
362,
641,
272,
252
],
"objectLocation1":[
2178,
475,
158,
152
],
"objectLocation2":[
146,
1340,
185,
73
]
},
"vvPoliceManDetectionOutput":{
"PoliceManDetection0":[
1114,
148,
18,
42,
1156,
148,
17,
40
],
"PoliceManDetection1":[
2813,
148,
17,
41,
2716,
139,
23,
34,
2850,
154,
19,
41
],
"PoliceManDetection2":[
1119,
1185,
18,
38,
1188,
1201,
19,
38
]
},
"sARLTestInfo":{
"SingleTrifficLightState":{
"SingleTrifficLightState0":[
633,
22,
38,
11,
2,
600,
22,
32,
12,
3
],
"SingleTrifficLightState1":[
2329,
22,
37,
12,
2,
2296,
21,
29,
13,
3
],
"SingleTrifficLightState2":[
633,
1057,
38,
12,
2,
598,
1057,
33,
13,
3
]
},
"WholeTrifficLightState":[
1,
1,
3
],
"LaneDircetion":99,
"CarDirection":3
},
"sRRTestInfo":{
"LaneDircetion":99,
"CarPose":99,
"CarDirection":9,
"reverseLaneProportion":0,
"overStopLineProportion":0
},
"sADTestInfo":{
"LaneDircetion":99,
"CarPose":99
},
"sCLALTestInfo":{
"CarBodyRate":0
}
}
rapidjson對於json的序列化與反序列化