[英]TCP threaded server/client
我正在尝试制作一个接受多个客户端的线程 TCP 服务器。 它只接受一位客户。 关于如何让服务器接受多个客户端的任何想法?
这是我到目前为止尝试过的:
我更改了服务器代码。 我同时运行了服务器和客户端,但似乎只有一个线程在工作。 我应该更改端口还是什么?
服务器代码:
package tcpecho;
import java.io.*;
import java.net.*;
class TCPserver implements Runnable {
private static String clientMSG;
private static String serverRespond;
private static ServerSocket MySocket=null;
private static Socket client;
private static Socket connectionSocket = null;
private BufferedReader inFromClient = null;
public TCPserver(Socket client){
TCPserver.client=client;}
public static void main(String[] args) {
try {
MySocket = new ServerSocket(6880);
System.out.println("TCP server is listining");
} catch (IOException e) {
System.err.println("TCP server is not listining : "+MySocket.getLocalPort());
}
try {
connectionSocket = MySocket.accept();
(new Thread(new TCPserver(connectionSocket))).start();
System.out.println("Is connected now : "+connectionSocket.getInetAddress());
} catch (IOException e) {
System.err.print("Accept failed");
}
}
public void socketProcess( )
{
try {
inFromClient = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
} catch (IOException e) {
System.err.println("Message from client is not reachable");
}
DataOutputStream outToClient = null;
try {
outToClient = new DataOutputStream(connectionSocket.getOutputStream());
} catch (IOException e) {
System.err.println("Message to client is not reachable");
}
try {
clientMSG = inFromClient.readLine();
} catch (IOException e) {
System.err.println("Message from client is not readable");
}
serverRespond = clientMSG +connectionSocket.getInetAddress()+ '\n';
try {
outToClient.writeBytes(serverRespond);
} catch (IOException e) {
System.err.println("Message to client is not out");
}
try {
MySocket.close();
} catch (IOException e1) {
System.err.println("Unable to close the socket");
}
}
@Override
public void run() {
socketProcess();
}
}
这是我的客户端代码:
package task3;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.Socket;
class Client {
public static void main(String argv[]) throws Exception {
String str;
String strFromServer;
BufferedReader inFromUser = new BufferedReader(new InputStreamReader(System.in));
Socket client = null;
// for(int i=0;i<10;i++){
int port = 6880;
try {
client = new Socket("192.168.56.1", port);
} catch (Exception e) {
System.err.println("Couldn't connect to the port" + port);
System.exit(1);
}
DataOutputStream outToServer = new DataOutputStream(client.getOutputStream());
BufferedReader inFromServer = new BufferedReader(new InputStreamReader(client.getInputStream()));
System.out.println("Write a message to the server :");
str = inFromUser.readLine();
outToServer.writeBytes(str + '\n');
strFromServer = inFromServer.readLine();
System.out.println("Respond from server: " + strFromServer);
client.close();
}
}
在你这样做之后
connectionSocket = MySocket.accept();
您需要将此connectionSocket
实例传递给一个新线程并在该线程上调用start
。
此外,将所有connectionSocket
处理逻辑移至 Thread 类的run
方法
(这个逻辑目前在上面提到的这一行之后的main
方法中)。
为了实现您自己的Thread
,您可以扩展Thread
或实现Runnable
。
检查此链接以获取更多详细信息: Java 线程
只是一个建议,如果您要始终向所有客户端打开多个线程,您可能需要查看使用非阻塞 io 的java.nio包。
这将允许您处理更多的连接。
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