模拟Ping操作的一个Java类

模拟Ping操作的一个Java类

本文为大家分享了模拟Ping操作的一个java类，具体内容如下

import java.io.IOException;

import java.net.InetAddress;

import java.net.UnknownHostException;

/**

* Creathttp://ed 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。

以上就是本文的全部内容，希望对大家的学习有所帮助。

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