Java 端口扫描器示例

 
/* ............... START ............... */
 
import java.net.*;
 
public class JavaPortScan {
 
    public static void main(String[] args) {
        for (int port = 1; port <= 65535; port++) {
            try {
                Socket socket = new Socket();
                socket.connect(new InetSocketAddress("localhost", port), 1000);
                socket.close();
                System.out.println("Port " + port + " is open");
            } catch (Exception ex) {
            }
        }
    }
}
 
/* ............... END ............... */

输出

Port 22 is open
Port 53 is open
Port 80 is open
Port 111 is open
Port 631 is open
Port 3306 is open
Port 48360 is open