我在 c 中有服务器,在 java 中有客户端,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将其递增并发送给客户端//我期待这个但是
服务器获取了一些错误的字符
4.客户端获取字符并将其写在屏幕上//期待这一点,但客户端失败并出现此
异常:
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.<init>(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异常之后关闭了
有人知道问题出在哪里吗?服务器,客户端使用TCP协议(protocol)。
服务器:
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <sys/un.h>
#include <unistd.h>
#include <netinet/in.h>
#include <unistd.h>
#include <signal.h>
#include <stdlib.h>
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 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();
}
}
最佳答案
您只能将 ObjectOutputStream 与其他也使用 ObjectInputStream 读取它的 Java 程序一起使用。很难想象一个 C 程序支持 Java 的序列化格式。
如果你想写文本,我建议你使用 PrintWriter/BufferedReader 或者更好的解决方案是使用 BufferedOutputStream 并进行你自己的编码(这样你会看到所有错误。
关于java - Java通信中C客户端中的TCP服务器,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8803581/