java通信中C客户端的TCP服务器
我有c中的服务器和java中的客户端，但它不起作用。
1.运行服务器，服务器等待客户端
2.运行客户端 – 客户端发送字符串
3.服务器获取第一个字符并增加它并发送给客户端//我期待这个但是
服务器得到一些错误的char
4.client获取字符并将其写在屏幕上//期待这个，但客户端失败了
例外：
Exception in thread "main" java.net.SocketException: Connection reset at java.net.SocketInputStream.read(SocketInputStream.java:168) at java.io.ObjectInputStream$PeekInputStream.read(ObjectInputStream.java:2266) at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2279) at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2750) at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:780) at java.io.ObjectInputStream.(ObjectInputStream.java:280) at clientTCP.main(clientTCP.java:19) 5）客户端应该结束并且服务器继续运行//但是客户端在上一个exception之后停止运行
有谁知道问题出在哪里？ 服务器，客户端使用TCP协议。
服务器：
#include #include #include #include #include #include #include #include #include int main() { int server_sockfd, client_sockfd; int server_len, client_len; struct sockaddr_in server_address; struct sockaddr_in client_address; server_sockfd = socket( AF_INET, SOCK_STREAM, 0 ); server_address.sin_family = AF_INET; server_address.sin_addr.s_addr = inet_addr( "127.0.0.1" ); server_address.sin_port = htons( 10000 ); server_len = sizeof( server_address ); if( bind( server_sockfd, ( struct sockaddr *)&server_address, server_len ) != 0 ) { perror("oops: server-tcp-single"); exit( 1 ); } listen( server_sockfd, 5 ); signal( SIGCHLD, SIG_IGN ); while( 1 ) { char ch; printf( "server wait...\n" ); client_len = sizeof( client_address ); client_sockfd = accept( server_sockfd, ( struct sockaddr *)&client_address, &client_len ); printf( "Client connected \n" ); if( fork() == 0 ) { read( client_sockfd, &ch, 1 ); printf( "Client send = %c\n", ch ); ch++; sleep( 5 ); printf( "Server send = %c\n", ch ); write( client_sockfd, &ch, 1 ); close( client_sockfd ); exit (0 ); } else close( client_sockfd ); } }
java中的客户端：
import java.io.*; import java.net.*; class clientTCP { public static void main(String argv[]) throws Exception { String sentence; String modifiedSentence; Socket socket = new Socket("127.0.0.1", 10000); InetAddress adresa = socket.getInetAddress(); //address System.out.print("Connecting on : "+adresa.getHostAddress()+" with hostname : "+adresa.getHostName()+"\n" ); ObjectOutputStream oos = new ObjectOutputStream(socket.getOutputStream()); oos.writeObject("HalloXXXX"); ObjectInputStream ois = new ObjectInputStream(socket.getInputStream()); String message = (String) ois.readObject(); System.out.println("Message Received: " + message); ois.close(); oos.close(); socket.close(); } }
您只能将ObjectOutputStream与其他Java程序一起使用，这些Java程序也使用ObjectInputStream来读取它。 很难想象一个支持Java序列化格式的C程序。
如果你想写文本我建议你使用PrintWriter / BufferedReader或更好的解决方案是使用BufferedOutputStream并做你自己的编码（所以你看到所有的错误。
你应该在writeObject（）方法之后使用oos.flush（）。