心跳检测--判断网络状态是否良好

java怎样去判断某个ip地址网络是否良好

可以通过InetAddress类和ping包方式

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

public class HeartBeat {
    //使用InetAddress类
    public boolean method1(String ipAddress) throws Exception {
        InetAddress host = InetAddress.getByName(ipAddress); //指定主机名称
        boolean status = host.isReachable(3000); //3000ms为超时时间
        System.out.println("请求主机IP地址：" + host.getHostAddress() + " t STATUS:" + status);
        return status;
    }

    /**
     * 调用控制台ping命令，完整逻辑
     *
     * @param ipAddress 请求IP地址
     * @param countNum  请求连接数量
     * @return status   连接状态
     */
    public String method2(String ipAddress, int countNum) {
        String command;
        String line;
        String packetLoss;
        String status = "";
        String timeout = "";
        BufferedReader br = null;

        String osName = System.getProperty("os.name");
        if (osName.toLowerCase().contains("linux")) {
            command = "ping " + ipAddress + " -c " + countNum;
            try {
                Process p = Runtime.getRuntime().exec(command);
                br = new BufferedReader(new InputStreamReader(p.getInputStream(), "GBK"));
                while ((line = br.readLine()) != null) {
                    boolean bl = !"".equals(line);
                    // 英文linux OS
                    if (line.contains("packet loss") && bl) {
                        packetLoss = line.split(",")[2].replace("packet loss", "").trim();
                        status = ipAddress + "---->丢包率:" + packetLoss;
                    } else if (line.contains("min/avg/max/mdev") && bl) {
                        timeout = line.split("=")[1].split("/")[1];
                        status += "---->延时:" + timeout + "ms";
                    }
                }
                //System.out.println(status);
                return status;
            } catch (Exception e) {
                e.printStackTrace();
                return e.getMessage();
            } finally {
                try {
                    br.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        } else if (osName.toLowerCase().contains("windows")) {
            command = "ping " + ipAddress + " -n " + countNum;
            try {
                Process p = Runtime.getRuntime().exec(command);
                br = new BufferedReader(new InputStreamReader(p.getInputStream(), "GBK"));
                while ((line = br.readLine()) != null) {
                    boolean bl = !"".equals(line);
                    // 中文windows OS
                    if (line.contains("丢失") && bl) {
                        packetLoss = line.split("\(")[1].replace("丢失)，","").trim();
                        status = ipAddress + "---->丢包率:" + packetLoss;
                    } else if (line.contains("平均") && bl) {
                        timeout = line.split("=")[3].trim();
                        status += "---->延时:" + timeout;
                    }
                }
                //System.out.println(status);
                return status;
            } catch (Exception e) {
                e.printStackTrace();
                return e.getMessage();
            } finally {
                try {
                    br.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        return "This system is not linux or windows!";
    }

    /**
     * 调用控制台ping命令，完整逻辑
     * @param ipAddress 请求IP地址
     * @param countNum 请求连接数量
     * @return 是否成功连接
     */
    public boolean method3(String ipAddress, int countNum) {
        String osName = System.getProperty("os.name");
        String command;
        if (osName.contains("Windows")){
            command = "ping " + ipAddress + " -n "+ countNum;
        }else{
            command = "ping " + ipAddress + " -c 100 -i 0";
        }
        System.out.println(command);
        String line;
        int connectedCount = 0;
        BufferedReader br = null;
        try {
            Process p = Runtime.getRuntime().exec(command);
            br = new BufferedReader(new InputStreamReader(p.getInputStream(), "GBK"));
            while ((line = br.readLine()) != null) {
                connectedCount += getCheckResult(line);
            }
            return (connectedCount/countNum) > 0.8 ;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }finally {
            try{
                br.close();
            }catch (Exception e){
                e.printStackTrace();
            }
        }
    }

    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;
    }
}

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