java怎么通过Socket向C++拿数据

Question

Answer 1

java socket 方式发送请求到指定主机（C程序客户端 为服务端），然后进入接受数据； 服务端等待请求，得到请求后进行相应；（要统一数据编码）
import java.net.*;
import java.io.*;
public class MyConnection2
{
public static void main(String[] args) throws Exception
{
Socket socket = new Socket("www.ptpress.com.cn", 80);
// 向服务端程序发送数据
OutputStream ops = socket.getOutputStream();

OutputStreamWriter opsw = new OutputStreamWriter(ops);
BufferedWriter bw = new BufferedWriter(opsw);

bw.write("hello world\r\n\r\n");
bw.flush();

// 从服务端程序接收数据
InputStream ips = socket.getInputStream();
InputStreamReader ipsr = new InputStreamReader(ips);
BufferedReader br = new BufferedReader(ipsr);
String s = "";    
while((s = br.readLine()) != null)
  System.out.println(s);    
socket.close();

}
}

C 客户端
#include

#include

#include

#include

#include

#include

#include

#include

#define MYPORT 3490 /*定义用户连接端口*/

#define BACKLOG 10 /*多少等待连接控制*/

main()

{

　　int sockfd, new_fd; /* listen on sock_fd, new connection on new_fd */

　　struct sockaddr_in my_addr; /* my address information */

　　struct sockaddr_in their_addr; /* connector's address information */

　　int sin_size;

　　if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {

　　perror("socket");

　　exit(1);

　　}

　　my_addr.sin_family = AF_INET; /* host byte order */

　　my_addr.sin_port = htons(MYPORT); /* short, network byte order */

　　my_addr.sin_addr.s_addr = INADDR_ANY; /* auto-fill with my IP */

　　bzero(&(my_addr.sin_zero),; /* zero the rest of the struct */

　　if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr))== -1) {

　　perror("bind");

　　exit(1);

　　}

　　if (listen(sockfd, BACKLOG) == -1) {

　　perror("listen");

　　exit(1);

　　}

　　while(1) { /* main accept() loop */

　　sin_size = sizeof(struct sockaddr_in);

　　if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size)) == -1) {

　　perror("accept");

　　continue;

　　}

　　printf("server: got connection from %s\n", \

　　inet_ntoa(their_addr.sin_addr));

　　if (!fork()) { /* this is the child process */

　　if (send(new_fd, "Hello, world!\n", 14, 0) == -1)

　　perror("send");

　　close(new_fd);

　　exit(0);

　　}

　　close(new_fd); /* parent doesn't need this */

　　while(waitpid(-1,NULL,WNOHANG) > 0); /* clean up child processes */

}

}