1. //测试ip+端口号是否可以连通
    2. public static boolean isHostConnectable(String host, int port) {
    3.     Socket socket = new Socket();
    4.     try {
    5.         socket.connect(new InetSocketAddress(host, port));
    6.     } catch (IOException e) {
    7.         e.printStackTrace();
    8.         return false;
    9.     } finally {
    10.         try {
    11.             socket.close();
    12.         } catch (IOException e) {
    13.             e.printStackTrace();
    14.         }
    15.     }
    16.     return true;
    17. }
    1. //测试ip+超时时间是否可以连接通
    2. public static boolean isHostReachable(String host, Integer timeOut) {
    3.     try {
    4.         return InetAddress.getByName(host).isReachable(timeOut);
    5.     } catch (UnknownHostException e) {
    6.         e.printStackTrace();
    7.     } catch (IOException e) {
    8.         e.printStackTrace();
    9.     }
    10.     return false;
    11. }