1 package unit;
2
3 import java.io.BufferedReader;
4 import java.io.IOException;
5 import java.io.InputStreamReader;
6 import java.net.InetAddress;
7 import java.util.regex.Matcher;
8 import java.util.regex.Pattern;
9
10 public class pingUtil {
11 public static boolean ping(String ipAddress) throws Exception{
12 int timeOut=3000;
13 boolean status=InetAddress.getByName(ipAddress).isReachable(timeOut); // 当返回值是true时，说明host是可用的
14 return status;
15 }
16
17 public static void ping02(String ipAddress){
18 String line=null;
19
20 try {
21 Process pro=Runtime.getRuntime().exec("ping "+ipAddress);
22 BufferedReader buf=new BufferedReader(new InputStreamReader(pro.getInputStream(),"utf-8"));
23 while((line=buf.readLine())!=null){
24 System.out.println(line);
25 }
26 } catch (Exception e) {
27 System.out.println(e.getMessage());
28 }
29 }
30
31 public static boolean ping(String ipAddress,int pingTimes,int timeOut){
32 BufferedReader in=null;
33 Runtime r= Runtime.getRuntime();
34 String pingCommand = "ping "+ipAddress+" -n "+pingTimes+" -w "+timeOut;
35
36 try {//执行命令并获取输出
37 System.out.println(pingCommand);
38 Process p = r.exec(pingCommand);
39 if(p==null){
40 return false;
41 }
42 in = new BufferedReader(new InputStreamReader(p.getInputStream(),"utf-8"));
43 int connectedCount=0;
44 String line=null;
45 while((line=in.readLine())!=null){
46 connectedCount += getCheckResult(line);
47 }//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
48 return connectedCount == pingTimes;
49 } catch (Exception e) {
50 e.printStackTrace();//出现异常则返回假
51 return false;
52 }finally{
53 try {
54 in.close();
55 } catch (IOException e) {
56 e.printStackTrace();
57 }
58 }
59 }
60
61 //若line含有=18ms TTL=16字样,说明已经ping通,返回1,否則返回0.
62 private static int getCheckResult(String line){
63 Pattern pattern=Pattern.compile("(\\d+ms)(\\s+)(TTL=\\d+)",Pattern.CASE_INSENSITIVE);
64 Matcher matcher = pattern.matcher(line);
65 while(matcher.find()){
66 return 1;
67 }
68 return 0;
69 }
70
71 public static void main(String[] args) throws Exception{
72 String ipAddress="www.qq.com";
73 // System.out.println(ping(ipAddress));
74 ping02(ipAddress);
75 System.out.println(ping(ipAddress,5,5000));
76 }
77
78 }
