private void loginAction(){
		//1.ȡjkź
	 	String jkStr=jta_jkNum.getText().trim();
		int jkNum=Integer.parseInt(jkStr);
		String pwd=jta_pwd.getText();
		 //2.Ϸ
		if(conn.conn2Server()){//Ϸ
			//3.½
			if(conn.loginServer(jkNum, pwd)){
				//4.ʾ //½ɹˣҪص½
				MainUIJavaKe mainUI=new MainUIJavaKe(jkNum);
				mainUI.showMainUI();
				conn.start();//5.߳
				//6.ûӸ,ΪϢ
				conn.addMsgListener(mainUI);
				jf_login.dispose();//رյ½
			}else{
				conn.closeMe();
				JOptionPane.showMessageDialog(jf_login, "½ʧ,ȷʺȷ!");
			}
		}else{
			conn.closeMe();
		JOptionPane.showMessageDialog(jf_login, "ʧ,ȷϷ,IPͶ˿ȷ!");
		}
	}