我正在尝试实现ServerSocket,但我根本无法理解如果关闭连接,为什么代码会被调用3次。这是我的代码:
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import static java.lang.System.out;
public class Main {
public static void main(String[] args) throws IOException {
int port = 8080;
ServerSocket serverSocket = new ServerSocket(port);
out.println("Listening ..");
while(true){
Socket socket = serverSocket.accept();
out.println("Connected" + socket.getLocalAddress());
new Thread(new MultiThreadServer(socket)).start();
}
}
}
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import static java.lang.System.out;
public class MultiThreadServer implements Runnable{
Socket clientSocket;
MultiThreadServer(Socket clientSocket){ this.clientSocket = clientSocket;};
@Override
public void run() {
try{
out.println("inside thread");
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(this.clientSocket.getInputStream()));
String request = bufferedReader.readLine();
out.println("request: " + request);
bufferedReader.close();
this.clientSocket.close(); //Without this line, the code is only called once
}catch(IOException e){
out.println(e);
}
}
}
因此,通过在clientSocket上调用close()方法将在“ while(true)”内部调用3次,而在不调用该方法的情况下,它将被调用一次。 这是带有socket.close()的日志:
Listening ..
Connected/0:0:0:0:0:0:0:1
inside thread
request: GET /tttes HTTP/1.1
Connected/0:0:0:0:0:0:0:1
inside thread
request: GET /tttes HTTP/1.1
Connected/0:0:0:0:0:0:0:1
inside thread
request: GET /tttes HTTP/1.1
这是没有socket.close()的日志:
Listening ..
Connected/0:0:0:0:0:0:0:1
inside thread
request: GET /tttes HTTP/1.1
答案 0 :(得分:0)
您的客户端更有可能正在等待来自服务器的数据,并且在先前的连接关闭之前不会尝试再次连接。这可以解释您看到的行为。
如果您有多个并发客户端,则一个连接不知道您不会为不相关的连接关闭该连接。