Java执行Ping命令代码

Java执行Ping命令代码

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

/**
 * @author Jack魏
 * @date 2021-03-22
 */
public class PingUtils {

    private static Logger logger = LoggerFactory.getLogger(PingUtils.class);
    /**
     * 次数
     */
    private static final int PING_TIMES = 3;
    /**
     * 超时时间
     */
    private static final int TIME_OUT = 3;
    /**
     * windows 正则表达式
     */
    private static Pattern pattern = Pattern.compile("(\\d+ms)(\\s+)(TTL=\\d+)",    Pattern.CASE_INSENSITIVE);
    /**
     * windows 指令
     */
    private static String countCommand = "-n" + " " + PING_TIMES + " -w " + TIME_OUT;
    /**
     * 与运行环境交互
     */
    private static final Runtime RUNTIME = Runtime.getRuntime();

    static {
        // 检测是不是linux服务器
        boolean isLinux = System.getProperty("os.name").toLowerCase().contains("linux");
        if (isLinux){
            // 执行linux 指令
            pattern = Pattern.compile("(icmp_seq=\\d+)",    Pattern.CASE_INSENSITIVE);
            countCommand = "-c" + " " + PING_TIMES + " -w " + TIME_OUT;
        }
    }

    /**
     * @param ip
     * @return true ping通 否则不通
     */
    public static boolean ping(String ip) {
        String pingCommand = "ping " + ip + " " + countCommand;
        Process p = null;
        try {
            // 执行命令并获取输出
            p = RUNTIME.exec(pingCommand);
            if (p == null) {
                return false;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        try(BufferedReader 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);
            }
            // 出现的次数>=测试次数则返回真
            return connectedCount >= PING_TIMES;
        } catch (Exception ex) {
            logger.error("ping异常---", ex);
            return false;
        }
    }
    /**
     * 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) {
        Matcher matcher = pattern.matcher(line);
        if (matcher.find()) {
            return 1;
        }
        return 0;
    }

    public static void main(String[] args) {
        System.out.println(ping("192.168.50.136"));
        System.out.println(ping("192.168.50.24"));
        System.out.println(ping("192.168.50.66"));
    }
}