A simple C++11 json parser. 用C++11实现的json解析器。
SimpleJSON is a lightweight json library written in C++.It surpports basic operations including reading and writting json documents.
SimpleJSON是一个轻量的由C++实现的json解析库。支持读写json文件等基本操作。
SimpleJSON mainly used for learning and communicating C++ programming and algorithm.It cannot ensure reliability in formal application yet.
SimpleJSON主要用来学习交流C++编程和算法。暂不能保证正式用途下的可靠性。
A C++11 compiler.
Add the C++ files in ./simple_jsonto your project like your other source files.
直接将 ./simple_json目录下的文件加入你的工程目录，按照自己的需求去编译即可。
#include <iostream>
#include <string>
#include <fstream>
#include <json.hpp>
using namespace std;
using namespace sjson;
int main()
{
ifstream ifs("/home/lpy/SimpleJSON/out1.json");
Json json(ifs); // construct json parser using input file stream
if (json.succeed())
{
string json_ptr;
json.toString(json_ptr, true); // get json string
cout << json_ptr << endl;
JsonNode& root = json.getRoot(); // get the root object
int id = root["id"].as_int(); // get the integer value of item named "id" in root object
cout << "id = " << id << endl;
root["id"] = 567; // set the value
id = root["id"].as_int();
cout << "id = " << id << endl;
string layer = root["friend"]["layers"][1].as_string(); // get the string value from array
cout << layer << endl;
root["friend"]["layers"][1] = "relu"; // set the value
json.toString(json_ptr, true);
cout << json_ptr << endl;
root["friend"]["layers"].clear(); // clear array
json.toString(json_ptr, true);
cout << json_ptr << endl;
root["author"] = "lpy"; // add an item named "author" and set the value
json.toString(json_ptr, true);
cout << json_ptr << endl;
if (root["optimizers"].set_array(3)) // add an array named "optimizers" and size is 3
{
json.toString(json_ptr, true);
cout << json_ptr << endl;
}
root["optimizers"][0] = "GradDescent";
root["optimizers"][1] = "Momentumn";
root["optimizers"][2] = "AdaGrad";
json.toString(json_ptr, true);
cout << json_ptr << endl;
json.save("/home/lpy/SimpleJSON/out2.json", true); // save as json file
}
return 0;
}The code above just shows part of operations.See the source code to learn more!