Java 中的服务器和客户端连接
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Server & Client Connection in Java
提问by Bucks
Here is an sample TCP/IP Server and Client programms
这是一个示例 TCP/IP 服务器和客户端程序
TCPServer
TCP服务器
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
TCP客户端
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();
}
}
In that Client i need to send text hi to Server. Onces the server reads that text Hi from Client side it display Client Id with Text is Active now
在该客户端中，我需要向服务器发送文本 hi。一旦服务器从客户端读取文本 Hi，它就会显示带有文本的客户端 ID 现在处于活动状态
采纳答案by CloudyMarble
Use the socket.getInetAddress()to get an InetAddressobject including the IP address then call the InetAddress.getHostAddress()to get it as a string.
使用socket.getInetAddress()获取包含 IP 地址的InetAddress对象，然后调用InetAddress.getHostAddress()以将其作为字符串获取。
