1、客户端：

#include "json//json.h"

#include

#pragma comment(lib, "WS2_32.lib")

#pragma comment(lib, "json_vc71_libmtd.lib")

int main()

{

Json::Value val;

Json::StyledWriter style_write;

val["name"] = "xiaoli" ;

WSADATA wsaData;

SOCKET SendSocket;

sockaddr_in RecvAddr;

int Port = 27015;

//初始化Socket

WSAStartup(MAKEWORD(2, 2), &wsaData);

//创建Socket对象

SendSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

//设置服务器地址

RecvAddr.sin_family = AF_INET;

RecvAddr.sin_port = htons(Port);

RecvAddr.sin_addr.s_addr = inet_addr("127.0.0.1");

std::string SendBuf = style_write.write(val);

//向服务器发送数据

sendto(SendSocket, SendBuf.c_str(), SendBuf.size(), 0, (SOCKADDR*)&RecvAddr, sizeof(RecvAddr));

closesocket(SendSocket);

WSACleanup();

getchar();

return 0;

}

2、服务器端：

#include

#include

#include "json/json.h"

#pragma comment(lib, "WS2_32.lib")

#pragma comment(lib, "json_vc71_libmtd.lib")

int main()

{

//初始化socket

WSADATA wsaData;

WSAStartup(MAKEWORD(2,2), &wsaData);

//创建socket

SOCKET RecvSocket;

RecvSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

//设置服务器地址

sockaddr_in RecvAddr;

int Port = 27015;

RecvAddr.sin_family = AF_INET;

RecvAddr.sin_port = htons(Port);

RecvAddr.sin_addr.s_addr = htonl(INADDR_ANY);

//绑定socket

bind(RecvSocket, (SOCKADDR*)&RecvAddr, sizeof(RecvAddr));

char RecvBuf[1024];

int BufLen = 1024;

sockaddr_in SenderAddr;

int SendAddrSize = sizeof(SenderAddr);

recvfrom(RecvSocket, RecvBuf, BufLen, 0, (SOCKADDR*)&SenderAddr, &SendAddrSize);

std::string strName;

Json::Value val;

Json::Reader reader;

if (reader.parse(RecvBuf, val))

{

strName = val["name"].asString();

}

std::cout << strName << std::endl;

closesocket(RecvSocket);

WSACleanup();

getchar();

return 0;

}

3、成功结果：