pingUtil

package unit;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class pingUtil {
     public static boolean ping(String ipAddress) throws Exception{  
            int timeOut=3000;  
            boolean status=InetAddress.getByName(ipAddress).isReachable(timeOut);   // 当返回值是true时，说明host是可用的  
            return status;  
        }  
          
        public static void ping02(String ipAddress){  
            String line=null;  
              
            try {  
                Process pro=Runtime.getRuntime().exec("ping "+ipAddress);  
                BufferedReader buf=new BufferedReader(new InputStreamReader(pro.getInputStream(),"utf-8"));  
                while((line=buf.readLine())!=null){  
                    System.out.println(line);  
                }  
            } catch (Exception e) {  
                System.out.println(e.getMessage());  
            }  
        }  
          
        public static boolean ping(String ipAddress,int pingTimes,int timeOut){  
            BufferedReader in=null;  
            Runtime r= Runtime.getRuntime();  
            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(),"utf-8"));  
                int connectedCount=0;  
                String line=null;  
                while((line=in.readLine())!=null){  
                    connectedCount += getCheckResult(line);  
                }//如果出现类似=20ms TTL=22这样的字符，出现的次数=测试次数 则返回真  
                return connectedCount == pingTimes;  
            } catch (Exception e) {  
                e.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){  
            Pattern pattern=Pattern.compile("(\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="www.qq.com";  
//            System.out.println(ping(ipAddress));  
            ping02(ipAddress);  
            System.out.println(ping(ipAddress,5,5000));
        }

}