完整代码链接

JSON11基本用法如下：

	//JSON对象转json字符串
	json11::Json my_json = json11::Json::object{
		     //json11支持的数据类型
		   { "keystr","value1" },
		   { "keybool",false },
		   { "keyint",5 },
		   { "keydouble",5.5},
		   { "keyarr", json11::Json::array { 1, 2, 3,6,7 } },
		   { "keyobj", json11::Json::object{{"key_obj","key_obj_val"}}},
	};


	std::string json_str = my_json.dump();
	std::cout << "json_str: " << json_str << "\n";


	json11::Json json = json11::Json::array{ json11::Json::object { { "key", "val" } } };
	std::string str = json[0]["key"].string_value();
	std::cout << "str===>>>: " << str << "\n";
   
	//JSON字符串转对象
	//const std::string simple_test = R"( {"k1":"v1", "k2":42, "k3":["a",123,true,false,null]} )";
	const std::string simple_test = "{\"k1\":\"v1\", \"k2\":42, \"k3\":[\"a\",123,true,false,null]} ";
	std::string err;
	const auto json1 = json11::Json::parse(simple_test, err);
	std::cout << "k1: " << json1["k1"].string_value() << "\n";
	std::cout << "k3: " << json1["k3"].dump() << "\n";
	for (auto &k : json1["k3"].array_items())
	{
		std::cout << "    - " << k.dump() << "\n";
	}