JAVA判断ip、端口是否可连接

public static boolean isHostConnectable(String host, int port) {
		Socket socket = new Socket();
		try {
			socket.connect(new InetSocketAddress(host, port));
		} catch (IOException e) {
			e.printStackTrace();
			return false;
		} finally {
			try {
				socket.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return true;
	}

public static boolean isHostReachable(String host, Integer timeOut) {
		try {
			return InetAddress.getByName(host).isReachable(timeOut);
		} catch (UnknownHostException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return false;
	}