我写完了一个客户端/服务器套接字通信程序,运行良好。现在我正在尝试弄清楚如何制作它,以便我可以同时与服务器建立多个客户端连接。我环顾四周,似乎有不止几种不同的方法可以做到这一点。所以我来这里向你们寻求帮助/建议。
我的服务器:
public class Server {
private ServerSocket serverSocket = null;
private Socket clientSocket = null;
public Server() {
try {
serverSocket = new ServerSocket(7003);
} catch (IOException e) {
System.err.println("Could not listen on port: 7003");
System.exit(1);
}
try {
clientSocket = serverSocket.accept();
} catch (IOException e) {
System.err.println("Accept failed");
System.exit(1);
}
}
public void startServer() throws IOException {
PrintWriter output = new PrintWriter(clientSocket.getOutputStream(), true);
BufferedReader input = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
String inputLine, outputLine;
outputLine = "Connected to Server";
output.println(outputLine);
while ((inputLine = input.readLine()) != null) {
// This just determines users input and server ruturns output based on that
outputLine = this.getServerOutput(inputLine);
output.println(outputLine);
if (outputLine.equals("Bye"))
break;
}
output.close();
input.close();
clientSocket.close();
serverSocket.close();
}
}
我需要让我的构造函数创建线程并startServer()
或者是我的运行方法?
你应该使用ExecutorService
。您的客户请求处理将是run()
of a Runnable
每次接受后你可以打电话ExecutorService.submit(runnableTask)
异步服务客户端。
使用 ExecutorService 的示例。
public class MyServer {
private static MyServer server;
private ServerSocket serverSocket;
/**
* This executor service has 10 threads.
* So it means your server can process max 10 concurrent requests.
*/
private ExecutorService executorService = Executors.newFixedThreadPool(10);
public static void main(String[] args) throws IOException {
server = new MyServer();
server.runServer();
}
private void runServer() {
int serverPort = 8085;
try {
System.out.println("Starting Server");
serverSocket = new ServerSocket(serverPort);
while(true) {
System.out.println("Waiting for request");
try {
Socket s = serverSocket.accept();
System.out.println("Processing request");
executorService.submit(new ServiceRequest(s));
} catch(IOException ioe) {
System.out.println("Error accepting connection");
ioe.printStackTrace();
}
}
}catch(IOException e) {
System.out.println("Error starting Server on "+serverPort);
e.printStackTrace();
}
}
//Call the method when you want to stop your server
private void stopServer() {
//Stop the executor service.
executorService.shutdownNow();
try {
//Stop accepting requests.
serverSocket.close();
} catch (IOException e) {
System.out.println("Error in server shutdown");
e.printStackTrace();
}
System.exit(0);
}
class ServiceRequest implements Runnable {
private Socket socket;
public ServiceRequest(Socket connection) {
this.socket = connection;
}
public void run() {
//Do your logic here. You have the `socket` available to read/write data.
//Make sure to close
try {
socket.close();
}catch(IOException ioe) {
System.out.println("Error closing client connection");
}
}
}
}
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