java 从面向连接（TCP）客户端/服务器的服务器套接字读取客户端套接字上的字节数据包？
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Read the packets of bytes on client socket from server socket for connection oriented (TCP) client/server?
提问by user441507
i m creating connection oriented server/client(TCP) socket.i have created whole server socket and i have written packet on server socket successfully and i have created client socket also but i m not be able to read packet so please give me the idea about read the packet(code or example) on client socket and tell clearly that can i read a packet on client socket or not if no then what should use in place of client and server socket
我正在创建面向连接的服务器/客户端（TCP）套接字。我已经创建了整个服务器套接字，我已经成功地在服务器套接字上写入了数据包，我也创建了客户端套接字，但我无法读取数据包，所以请给我关于读取的想法客户端套接字上的数据包（代码或示例）并清楚地告诉我是否可以在客户端套接字上读取数据包，如果没有，那么应该使用什么来代替客户端和服务器套接字
回答by Jon Skeet
You don't generally read a packet at a time - you read from the InputStreamreturned by Socket.getInputStream(). You should almost certainly be treating the connection as a stream, rather than even attempting to handle individual packets.
您通常不会一次读取一个数据包 - 您从InputStream返回的Socket.getInputStream(). 您几乎肯定应该将连接视为流，而不是尝试处理单个数据包。
If you still run into problems, it would really help if you could post some code to show how you're connecting the socket etc.
如果您仍然遇到问题，如果您可以发布一些代码来显示您如何连接套接字等，那将非常有帮助。
回答by Sanchit
I had to implement such a thing for my networking course in college.
我不得不在大学的网络课程中实现这样的东西。
Here's an excerpt from the book
这是本书的摘录
TCPServer.java
TCPServer.java
import java.io.*;
import java.net.*;
class TCPServer
{
public static void main(String argv[]) throws Exception
{
String clientSentence;
String capitalizedSentence;
ServerSocket welcomeSocket = new ServerSocket(6789);
while(true)
{
Socket connectionSocket = welcomeSocket.accept();
BufferedReader inFromClient =
new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
DataOutputStream outToClient = new DataOutputStream(connectionSocket.getOutputStream());
clientSentence = inFromClient.readLine();
System.out.println("Received: " + clientSentence);
capitalizedSentence = clientSentence.toUpperCase() + '\n';
outToClient.writeBytes(capitalizedSentence);
}
}
}
TCPClient.java
客户端程序
import java.io.*;
import java.net.*;
class TCPClient
{
public static void main(String argv[]) throws Exception
{
String sentence;
String modifiedSentence;
BufferedReader inFromUser = new BufferedReader( new InputStreamReader(System.in));
Socket clientSocket = new Socket("localhost", 6789);
DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
sentence = inFromUser.readLine();
outToServer.writeBytes(sentence + '\n');
modifiedSentence = inFromServer.readLine();
System.out.println("FROM SERVER: " + modifiedSentence);
clientSocket.close();
}
}
Hopefully this will be sufficient to figure out what you did wrong. Good luck!
希望这足以找出你做错了什么。祝你好运！
