java 如何判断是否可以ping通某个地址

/**

  * @description: 判断是否可以ping通某个地址,10s内ping5次均可ping通

  * @params: url网址或者IP，如：HdhCmsTestbaidu测试数据   220.181.38.148

  * @return:

  * @auther: WZH

  * @date: 2020/1/29 21:49

  */

public static boolean canPing(String url) {

     return ping(url, 5 , 10 );

}

public static boolean ping(String ipAddress, int pingTimes, int timeOut) {

     BufferedReader in = null ;

     Runtime r = Runtime.getRuntime();

     // 将要执行的ping命令,此命令是windows格式的命令

     String pingCommand = "ping " + ipAddress + " -n " + pingTimes + " -w " + timeOut;

     try {

         // 执行命令并获取输出

         System.out.println(pingCommand);

         Process p = r.exec(pingCommand);

         if (p == null ) {

             return false ;

         }

         // 逐行检查输出,计算类似出现=23ms TTL=62字样的次数

         in = new BufferedReader( new InputStreamReader(p.getInputStream()));

         int connectedCount = 0 ;

         String line;

         while ((line = in.readLine()) != null ) {

             connectedCount += getCheckResult(line);

         }

         // 如果出现类似=23ms TTL=62这样的字样,出现的次数=测试次数则返回真

         return connectedCount == pingTimes;

     } catch (Exception ex) {

         ex.printStackTrace();

         // 出现异常则返回假

         return false ;

     } finally {

         try {

             assert in != null ;

             in.close();

         } catch (IOException e) {

             e.printStackTrace();

         }

     }

}

private final static Pattern PATTERN= Pattern测试数据pile( "(\\d+ms)(\\s+)(TTL=\\d+)" , Pattern.CASE_INSENSITIVE);

private static int getCheckResult(String line) {

     //若line含有=18ms TTL=16字样,说明已经ping通,返回1,否則返回0.

     Matcher matcher = PATTERN.matcher(line);

     if (matcher.find()) {

         return 1 ;

     }

     return 0 ;

}

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.InetAddress;

import java.net.UnknownHostException;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class Ping {

     public static boolean ping(String ipAddress) throws Exception {

         int   timeOut =  3000 ;  //超时应该在3钞以上       

         boolean status = InetAddress.getByName(ipAddress).isReachable(timeOut);     // 当返回值是true时，说明host是可用的，false则不可。

         return status;

     }

     public static void ping02(String ipAddress) throws Exception {

         String line = null ;

         try {

             Process pro = Runtime.getRuntime().exec( "ping " + ipAddress);

             BufferedReader buf = new BufferedReader( new InputStreamReader(

                     pro.getInputStream()));

             while ((line = buf.readLine()) != null )

                 System.out.println(line);

         } catch (Exception ex) {

             System.out.println(ex.getMessage());

         }

     }

     public static boolean ping(String ipAddress, int pingTimes, int timeOut) { 

         BufferedReader in = null ; 

         Runtime r = Runtime.getRuntime();  // 将要执行的ping命令,此命令是windows格式的命令 

         String pingCommand = "ping " + ipAddress + " -n " + pingTimes    + " -w " + timeOut; 

         try {   // 执行命令并获取输出 

             System.out.println(pingCommand);  

             Process p = r.exec(pingCommand);  

             if (p == null ) {   

                 return false ;  

             }

             in = new BufferedReader( new InputStreamReader(p.getInputStream()));   // 逐行检查输出,计算类似出现=23ms TTL=62字样的次数 

             int connectedCount = 0 ;  

             String line = null ;  

             while ((line = in.readLine()) != null ) {   

                 connectedCount += getCheckResult(line);  

             }   // 如果出现类似=23ms TTL=62这样的字样,出现的次数=测试次数则返回真 

             return connectedCount == pingTimes; 

         } catch (Exception ex) {  

             ex.printStackTrace();   // 出现异常则返回假 

             return false ; 

         } finally {  

             try {   

                 in.close();  

             } catch (IOException e) {   

                 e.printStackTrace();  

             } 

         }

     }

     //若line含有=18ms TTL=16字样,说明已经ping通,返回1,否則返回0.

     private static int getCheckResult(String line) {  // System.out.println("控制台输出的结果为:"+line); 

         Pattern pattern = Pattern测试数据pile( "(\\d+ms)(\\s+)(TTL=\\d+)" ,    Pattern.CASE_INSENSITIVE); 

         Matcher matcher = pattern.matcher(line); 

         while (matcher.find()) {

             return 1 ;

         }

         return 0 ;

     }

     public static void main(String[] args) throws Exception {

         String ipAddress = "127.0.0.1" ;

         System.out.println(ping(ipAddress));

         ping02(ipAddress);

         System.out.println(ping(ipAddress, 5 , 5000 ));

     }

}