c++做socket客户端,java做socket服务器的问题

Q446512799 2019-04-03 05:01:26

现在使用c++写的socket客户端通信
java代码写的socket服务端

现在是Java服务端收到了c++客户端的消息，且做了返回，但c++客户端接收一直失败
同样用c++写的socket服务端，客户端是能正常接收的

c++代码如下：



	const int BUF_SIZE = 10240;



	int nNetTimeout = 1000;//1秒



	WSADATA wsd; //WSADATA变量

	SOCKET sHost; //服务器套接字

	SOCKADDR_IN servAddr; //服务器地址

	char buf[BUF_SIZE]; //接收数据缓冲区

	static char bufRecv[BUF_SIZE];

	char log[1024 + 1];



	char ip[32 + 1];



	cout << (char*)info.c_str() << endl;



	char *sendbuf = (char*)info.c_str();

	string recvbuf;



	int retVal; //返回值

				//初始化套结字动态库

	if (WSAStartup(MAKEWORD(2, 2), &wsd) != 0)

	{

		cout << "WSAStartup failed!" << endl;

		return recvbuf;

	}



	//创建套接字

	sHost = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

	if (INVALID_SOCKET == sHost)

	{

		cout << "socket failed!" << endl;

		WSACleanup();//释放套接字资源

		return  recvbuf;

	}

	//发送时限

	setsockopt(sHost, SOL_SOCKET, SO_SNDTIMEO, (char *)&nNetTimeout, sizeof(int));

	//接收时限

	setsockopt(sHost, SOL_SOCKET, SO_RCVTIMEO, (char *)&nNetTimeout, sizeof(int));



	char hostname[256];

	gethostname(hostname, sizeof(hostname));

	HOSTENT* host = gethostbyname(hostname);

	strcpy_s(ip, inet_ntoa(*(in_addr*)*host->h_addr_list));



	//设置服务器地址

	servAddr.sin_family = AF_INET;

	servAddr.sin_addr.s_addr = inet_addr(ip);

	servAddr.sin_port = htons((short)8000);

	int nServAddlen = sizeof(servAddr);



	//连接服务器

	retVal = connect(sHost, (LPSOCKADDR)&servAddr, sizeof(servAddr));

	if (SOCKET_ERROR == retVal)

	{

		cout << "connect failed!" << endl;

		closesocket(sHost); //关闭套接字

		WSACleanup(); //释放套接字资源

		recvbuf = "conn err";

		return recvbuf;

	}

	cout << "connect ok!" << endl;

	//向服务器发送数据

	ZeroMemory(buf, BUF_SIZE);



	cout << "send msg is:" << sendbuf << endl;

	retVal = send(sHost, sendbuf, strlen(sendbuf), 0);

	if (SOCKET_ERROR == retVal)

	{

		cout << "send failed!" << endl;

		closesocket(sHost); //关闭套接字

		WSACleanup(); //释放套接字资源

		recvbuf = "send err";

		return recvbuf;

	}



	cout << "send ok!" << endl;



	ZeroMemory(bufRecv, BUF_SIZE);



	retVal = recv(sHost, bufRecv, BUF_SIZE, 0);

	if (retVal < 0)

	{

		cout << "recv err" << endl;

	}

	//退出

	closesocket(sHost); //关闭套接字

	WSACleanup(); //释放套接字资源

	recvbuf = bufRecv;



	cout << "recv msg is " << bufRecv << endl;



	return recvbuf;

java服务端代码：



ServerSocket serversocket = new ServerSocket(8000);

		System.out.println("listen 8000");

		Socket socket = serversocket.accept();

		System.out.println("have client connect");

		InputStream inp = socket.getInputStream();

		InputStreamReader isr = new InputStreamReader(inp);

		BufferedReader bfr = new BufferedReader(isr);

		

		String info = null;

		while ((info = bfr.readLine())!=null) {

			System.out.println("recv msg is:"+info);

		}

		socket.shutdownInput();

		

		OutputStream ots = socket.getOutputStream();

		PrintWriter pw = new PrintWriter(ots);

		pw.write("ni hao ya!!!!!");

		pw.flush();

		

		System.out.println("have send client msg");

		

		pw.close();

		ots.close();

		bfr.close();

		isr.close();

		inp.close();

		socket.close();

		serversocket.close();