端口扫描实例

package Socket;

import java.io.IOException;
import java.net.Socket;

public class TestSocket {
?public static void main(String[] args) {
??// TODO Auto-generated method stub
??System.out.println("args是："+args.length);
?????? String host="localhost";
?????? if(args.length>0){
??? ??? host=args[0];
?????? }
?????? for(int i=1;i<=1024;i++){
??? ??? try {
???Socket s=new Socket(host,i);
???System.out.println("port"+i+"can use");
??
??} catch (IOException e) {
???
??}
?????? }
?????? System.out.println("Scanner over!");
?????? System.exit(0);
?}

}