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- 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 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,否则返回0.
- private static int getCheckResult(String line) { // System.out.println("控制台输出的结果为:"+line);
- Pattern pattern = Pattern.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 = "172.18.1.171";
- System.out.println(ping(ipAddress));
- ping02(ipAddress);
- System.out.println(ping(ipAddress, 5, 5000));
- }
- }
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