c++读写json,JsonCpp配置

JsonCpp配置

windows  VS编辑器;

下载 Jsoncpp 源码 , 链接 : https://github.com/open-source-parsers/jsoncpp

python amalgamate.py。运行amalgamate.py文件;

之后应该会报以下错误:

c++读写json,JsonCpp配置_第1张图片

原因是因为 include文件下缺少version.h

创建version.h,内容如下:

 


// DO NOT EDIT. This file is generated by CMake from  "version" 
// and "version.h.in" files.
// Run CMake configure step to update it.
#ifndef JSON_VERSION_H_INCLUDED
# define JSON_VERSION_H_INCLUDED

# define JSONCPP_VERSION_STRING "0.6.0-dev"
# define JSONCPP_VERSION_MAJOR 0
# define JSONCPP_VERSION_MINOR 6
# define JSONCPP_VERSION_PATCH 0
# define JSONCPP_VERSION_QUALIFIER -dev
# define JSONCPP_VERSION_HEXA ((JSONCPP_VERSION_MAJOR << 24) | (JSONCPP_VERSION_MINOR << 16) | (JSONCPP_VERSION_PATCH << 8))

#endif // JSON_VERSION_H_INCLUDED

之后运行amalgamate.py会有个dist文件夹;

dist下有json文件夹和jsoncpp.cpp文件,将这两个复制到自己的项目中,注意#include路径;

项目属性->VC++目录->包含目录 将json项目的include路径包含进去;

JsonCpp简单读写json文件

#include 
#include 
#include "json/json.h"


void write_json() {

	ofstream out;
	out.open("D:\\test.txt");

	Json::Value root;
	Json::StyledWriter write;
	root["name"] = "person";
	root["age"] = 18;

	out << write.write(root);
	out.close();
}

void read_json() {

	ifstream in;
	in.open("D:\\test.txt");

	Json::Reader read;
	Json::Value root;

	if(read.parse(in,root)) {
		Json::Value name = root["name"].asString();
		Json::Value age = root["age"].asInt();
		cout << root << endl;
		cout << name << endl;
		cout << age << endl;
	}

}


int main(int argc, char* argv[]) {
	write_json();
	read_json();

	system("pause");
}

 

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