Java测试IP和端口是否连通

public static boolean pingIp(String ip) throws UnknownHostException, IOException {//能ping通放回true 反之 false 超时时间 3000毫秒return InetAddress.getByName(ip).isReachable(5000);}public static boolean telnetport(String ip, Integer port) throws IOException {Socket connect = new Socket();boolean res = false;try {connect.connect(new InetSocketAddress(ip, port), 1000);//建立连接//能telnet通返回true，否则返回falseres = connect.isConnected();//通过现有方法查看连通状态} catch (IOException e) {e.printStackTrace();System.out.println("false");//当连不通时，直接抛异常，异常捕获即可} finally {try {connect.close();} catch (IOException e) {e.printStackTrace();System.out.println("false");}}return res;}