非常簡單我想創建一個聊天室,接受多個客戶端,所有客戶端都可以分配自己的ID。每當他們輸入任何東西時,它都會發送給所有用戶。目前,我有一個回顯客戶端服務器,客戶端輸入內容並回顯。我的第一個問題是如何讓用戶給自己一個用戶名?顯然我需要一個接受名稱的變量,你推薦我把它放在什麼類中?我怎麼會得到這個名字本身像 if (theInput.equalsIgnoreCase("username" : "
「))簡單的java聊天室
然後,我需要做的是迴應客戶說什麼,所有的客戶端。我不知道如何做到這一點,所以任何意見雖然我在網上發現了一些教程和示例代碼,但是我不明白它,如果我不明白即使它工作正常,我也不習慣使用它。我的代碼: EchoClient
'// echo client
import java.util.Scanner;
import java.io.*;
import java.net.*;
public class EchoClient {
public static void main(String[] args) throws IOException {
Socket echoSocket = null;
//PrintWriter socketOut = null;
try {
echoSocket = new Socket("127.0.0.1", 4444); // connect to self at port 4444
System.out.println("Connected OK");
Scanner socketIn = new Scanner(echoSocket.getInputStream()); // set up input from socket
PrintWriter socketOut = new PrintWriter(echoSocket.getOutputStream(), true); // set up output to socket
Scanner kbdIn = new Scanner(System.in); // Scanner to pick up keyboard input
String serverResp = "";
String userInput = kbdIn.nextLine(); // get input from the user
while (true) {
socketOut.println(userInput); // send user input to the socket
serverResp = socketIn.nextLine(); // get the response from the socket
System.out.println("echoed back: " + serverResp); // print it out
if (serverResp.equals("Closing connection")) { break; } //break if we're done
userInput = kbdIn.nextLine(); // get next user input
}
socketOut.close();
kbdIn.close();
socketIn.close();
}
catch (ConnectException e) {
System.err.println("Could not connect to host");
System.exit(1);
}
catch (IOException e) {
System.err.println("Couldn't get I/O for connection");
System.exit(1);
}
echoSocket.close();
}
}」
EchoServer的
// multiple (threaded) server
import java.net.ServerSocket;
import java.net.Socket;
public class EchoServerMult {
public static void main(String[] args) throws Exception {
ServerSocket serverSocket = new ServerSocket(4444); // create server socket on this machine
System.err.println("Started server listening on port 4444");
while (true) { // as each connection is made, pass it to a thread
//new EchoThread(serverSocket.accept()).start(); // this is same as next 3 lines
Socket x = serverSocket.accept(); // block until next connection
EchoThread et = new EchoThread(x);
et.start();
System.err.println("Accepted connection from client");
}
}
}
EchoThread
// thread to handle one echo connection
import java.net.*;
import java.io.*;
import java.util.Scanner;
public class EchoThread extends Thread {
private Socket mySocket = null;
public EchoThread(Socket socket) { // constructor method
mySocket = socket;
}
public void run() {
try {
PrintWriter out = new PrintWriter(mySocket.getOutputStream(), true);
Scanner in = new Scanner(mySocket.getInputStream());
String inputLine;
while (true) {
inputLine = in.nextLine();
if (inputLine.equalsIgnoreCase("Bye")) {
out.println("Closing connection");
break;
} else {
out.println(inputLine);
}
}
out.close();
in.close();
mySocket.close();
} catch (Exception e) {
System.err.println("Connection reset"); // bad error (client died?)
}
}
}
嗨 - 1)我不確定這只是一個「有趣的實驗」,一項家庭作業......或者如果您真的想創建一個人們可以使用的聊天室。如果是後者,我強烈建議你考慮編寫一個Web應用程序:例如,使用Tomcat和.jsp。 2)問:「迴應客戶對所有客戶說的話?」答:爲每個客戶創建一些「列表」。至少需要a)用戶名和b)IP地址或套接字。 – paulsm4