端口号的正则表达式java java检测端口号是否被占用

public static void main(String[] args) { 

 boolean flag=false; 

 flag=isPortAvailable(ReadPropertiesUtil.OpenOffice_PORT); 

 if(flag){ 

 System.out.println("未被占用"); 

 }else{ 

 System.out.println("已占有"); 

 } 

 } 

 /** 

 * 查看端口是否被占用 

 * @param port 

 * @return 

 */ 

 @SuppressWarnings("unused") 

 public static boolean isPortAvailable(int port) { 

 Socket s = new Socket(); 

 boolean flag=false; 

 String f=""; 

 List<String> ipList=new ArrayList<String>(); 

 try { 

 Enumeration<NetworkInterface> netInterfaces = NetworkInterface 

 .getNetworkInterfaces(); 

 while (netInterfaces.hasMoreElements()) { 

 NetworkInterface nif = netInterfaces.nextElement(); 

 Enumeration<InetAddress> iparray = nif.getInetAddresses(); 

 while (iparray.hasMoreElements()) { 

 ipList.add(iparray.nextElement().getHostAddress()); 

 } 

 } 


 for (int i = 0; i < ipList.size(); i++) { 

 flag=bindPort(ipList.get(i), port); 

 if(!flag){ 

 break; 

 } 

 } 


 if(flag){//未被占用 

 return true; 

 }else{//已被占用 

 return false; 

 } 

 } catch (Exception e) { 

 return false; 

 } 

 } 


 /** 

 * 查看是否能绑定ip端口 

 * @param host 

 * @param port 

 * @return 

 * @throws Exception 

 */ 

 @SuppressWarnings("finally") 

 private static Boolean bindPort(String host, int port) throws Exception { 

 boolean flag=false; 

 try { 

 Socket s = new Socket(); 

 s.bind(new InetSocketAddress(host, port)); 

 s.close(); 

 flag=true; 

 } catch (Exception e) { 

 flag=false; 

 e.printStackTrace(); 

 } finally{ 

 return flag; 

 } 

 }