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。
