分享Java中模拟Ping操作的一个类

水深无声 2022-08-06 10:21 105阅读 0赞

似乎使用JavaPing的操作很少啊，不过我遇到了；最终解决了，在这里贴出一个中间过程中的类。

import java.io.IOException;
    import java.net.InetAddress;
    import java.net.UnknownHostException;
    
    /**
     * Created by QiuJU
     * on 2014/9/21.
     */
    public class SimplePing implements Runnable {
        private final Object mEndLock = new Object();
        private boolean IsEnd = false;
    
        private int arrivedCount = 0;
    
        private int Count;
        private int TimeOut;
        private String Name;
    
        private int mEndCount;
        private String mIp = null;
        private float mLossRate = 1f;
        private float mDelay = 0;
    
    
        public SimplePing(String name, int count, int timeOut) {
            Count = mEndCount = count;
            TimeOut = timeOut;
            Name = name;
            for (int i = 0; i < mEndCount; i++) {
                Thread thread = new Thread(this);
                thread.setDaemon(true);
                thread.start();
            }
            if (!IsEnd) {
                try {
                    synchronized (mEndLock) {
                        mEndLock.wait();
                    }
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    
        private void setEnd(boolean isArrived, long delay, String ip) {
            synchronized (mEndLock) {
                Count--;
                if (isArrived) {
                    arrivedCount++;
                    mDelay = (mDelay + delay) / 2f;
                    if (ip != null)
                        mIp = ip;
                }
            }
            if (Count == 0)
                setEnd();
        }
    
        private void setEnd() {
            mLossRate = (mEndCount - arrivedCount) / mEndCount;
    
            IsEnd = true;
            synchronized (mEndLock) {
                mEndLock.notifyAll();
            }
        }
    
        @Override
        public void run() {
            long delay = 0;
            boolean isArrived = false;
            String ip = null;
            try {
                long startTime = System.currentTimeMillis();
                InetAddress address = InetAddress.getByName(Name);
                isArrived = address.isReachable(TimeOut);
                delay = System.currentTimeMillis() - startTime;
                ip = address.getHostAddress();
            } catch (UnknownHostException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                setEnd(isArrived, delay, ip);
            }
        }
    
        public String getIp() {
            return mIp;
        }
    
        public float getLossRate() {
            return mLossRate;
        }
    
        public float getDelay() {
            return mDelay;
        }
    
        public boolean getIsSucceed() {
            return arrivedCount > 0;
        }
    }

在类中使用的是：

long startTime = System.currentTimeMillis();
                InetAddress address = InetAddress.getByName(Name);
                isArrived = address.isReachable(TimeOut);
                delay = System.currentTimeMillis() - startTime;
                ip = address.getHostAddress();

其中的：address.isReachable(TimeOut);方法，但是这个方法有一定局限性；当是Root模式下会发送ICMP进行Ping操作，这就比较真实了；但是如果是非Root模式下则是使用的Socket进行的模拟。

之所以说是中间类，也就是因为这个原因没有采用这个类。

在这里贴出来也算是一个记录吧。

当然如果你想知道最终解决办法，我可以告诉是使用的命令行操作，然后进行的解析。