使用jsoncpp解析json文件

{
    "name" : "雄霸天下",
    "no_camp" : 0,
	"save_state" : 1,
    "state_locked" : 1,
    "default_state" : 3,
    "recover_state" : 1,
	
	"relive" : 
	{
            "type" : "11",
            "relive_item" : 200000016,
			"state": [100],
			"camp_relive":
			[
				{
					"posX": 4615,
					"posY": 2245
				},
				{
					"posX": 2910,
					"posY": 6378
				},
				{
					"posX": 813,
					"posY": 3589
				}
			]
    }
}

json文件如上，如何配置jsoncpp可以查看配置jsoncpp.

其中一般键名可以直接解析，如no_camp键名对应键值为0；

可以用int no_camp = root["no_camp"].asInt();来解析。

复杂数组可以参考如下代码：

#include<string.h>
#include<json/json.h>
#include<iostream>
#include<fstream>
using namespace std;
void ReadFileJson();
int main()
{
	ReadFileJson();
	return 0;
}
void ReadFileJson()
{
	Json::Value root;//定义根节点
	Json::Reader reader;
	ifstream in("C:\\Users\\57273\\Desktop\\s70301.json", ios::binary);//输入json文件的绝对路径
	if (!in.is_open())
	{
		cout << "文件打开错误"<<endl;
		return;
	}
	/*
	//s70301.json内容如下
	{
    "name" : "雄霸天下",
    "no_camp" : 0,
	"save_state" : 1,
    "state_locked" : 1,
    "default_state" : 3,
    "recover_state" : 1,
	
	"relive" : 
	{
            "type" : "11",
            "relive_item" : 200000016,
			"state": [100],
			"camp_relive":
			[
				{
					"posX": 4615,
					"posY": 2245
				},
				{
					"posX": 2910,
					"posY": 6378
				},
				{
					"posX": 813,
					"posY": 3589
				}
			]
    }
}
*/
	if (reader.parse(in, root))
	{
		string name = root["name"].asString();//普通键值解析
		int no_camp = root["no_camp"].asInt();
		int save_state = root["save_state"].asInt();
		int state_locked = root["state_locked"].asInt();
		int default_state = root["default_state"].asInt();
		int recover_state = root["recover_state"].asInt();
		cout << "name 是  " << name << endl;
		cout << "no_camp is  " << no_camp << endl;
		cout << "save_state is  " << save_state << endl;
		cout << "state_locked is  " << state_locked << endl;
		cout << "default_state is  " << default_state << endl;
		cout << "recover_state is  " << recover_state << endl;
		//string str ="雄霸天下";
		//cout << str << endl;
		string relive_type = root["relive"]["type"].asString();
		int  relive_relive_item = root["relive"]["relive_item"].asInt();
		cout << "relive_type is  " << relive_type << endl;
		cout << "relive_camp_item is  " << relive_relive_item << endl;
		int sz = root["relive"]["state"].size();
		for (int i = 0; i < sz; i++)//简单数组解析
		{
			int state = root["relive"]["state"][i].asInt();
			cout<<"state is" << state;
		}
		cout <<  endl;
		int size = root["relive"]["camp_relive"].size();
		for (int i = 0; i < size; i++)//复杂数组解析
		{
			int posx = root["relive"]["camp_relive"][i]["posX"].asInt();
			int posy = root["relive"]["camp_relive"][i]["posY"].asInt();
			//cout << posx << endl;

			cout << "posx is  " << posx << "    posy is  " << posy << endl;
		}
	}
}

输出结果为：

其中，name键对应 的中文键值“雄霸天下”出现乱码，原因是json的编码方式和vs的编码方式不同，暂未有详细解决方案，后续解决后会写出来。