import java.io.*;
import java.net.*;
import java.nio.channels.*;
import java.util.*;
import java.util.regex.*;
public class Ping {
static int DAYTIME_PORT = 13;
static int port = DAYTIME_PORT;
static class Target {
InetSocketAddress address;
SocketChannel channel;
Exception failure;
long connectStart;
long connectFinish = 0;
boolean shown = false;
Target(String host) {
try {
address = new InetSocketAddress(InetAddress.getByName(host),
port);
} catch (IOException x) {
failure = x;
}
}
void show() {
String result;
if (connectFinish != 0)
result = Long.toString(connectFinish - connectStart) + "ms";
else if (failure != null)
result = failure.toString();
else
result = "Timed out";
System.out.println(address + " : " + result);
shown = true;
}
}
static class Printer extends Thread {
LinkedList pending = new LinkedList();
Printer() {
setName("Printer");
setDaemon(true);
}
void add(Target t) {
synchronized (pending) {
pending.add(t);
pending.notify();
}
}
public void run() {
try {
for (;;) {
Target t = null;
synchronized (pending) {
while (pending.size() == 0)
pending.wait();
t = (Target) pending.removeFirst();
}
t.show();
}
} catch (InterruptedException x) {
return;
}
}
}
static class Connector extends Thread {
Selector sel;
Printer printer;
LinkedList pending = new LinkedList();
Connector(Printer pr) throws IOException {
printer = pr;
sel = Selector.open();
setName("Connector");
}
void add(Target t) {
SocketChannel sc = null;
try {
sc = SocketChannel.open();
sc.configureBlocking(false);
boolean connected = sc.connect(t.address);
t.channel = sc;
t.connectStart = System.currentTimeMillis();
if (connected) {
t.connectFinish = t.connectStart;
sc.close();
printer.add(t);
} else {
synchronized (pending) {
pending.add(t);
}
sel.wakeup();
}
} catch (IOException x) {
if (sc != null) {
try {
sc.close();
} catch (IOException xx) {
}
} t.failure = x;
printer.add(t);
}
}
void processPendingTargets() throws IOException {
synchronized (pending) {
while (pending.size() > 0) {
Target t = (Target) pending.removeFirst();
try {
t.channel.register(sel, SelectionKey.OP_CONNECT, t);
} catch (IOException x) {
t.channel.close();
t.failure = x;
printer.add(t);
}
}
}
}
void processSelectedKeys() throws IOException {
for (Iterator i = sel.selectedKeys().iterator(); i.hasNext();) {
SelectionKey sk = (SelectionKey) i.next();
i.remove();
Target t = (Target) sk.attachment();
SocketChannel sc = (SocketChannel) sk.channel();
try {
if (sc.finishConnect()) {
sk.cancel();
t.connectFinish = System.currentTimeMillis();
sc.close();
printer.add(t);
}
} catch (IOException x) {
sc.close();
t.failure = x;
printer.add(t);
}
}
}
volatile boolean shutdown = false;
void shutdown() {
shutdown = true;
sel.wakeup();
}
public void run() {
for (;;) {
try {
int n = sel.select();
if (n > 0)
processSelectedKeys();
processPendingTargets();
if (shutdown) {
sel.close();
return;
}
} catch (IOException x) {
x.printStackTrace();
}
}
}
}
public static void main(String[] args) throws InterruptedException,
IOException {
args = new String[] { "8888", "192.168.10.193" };
if (args.length < 1) {
System.err.println("Usage: java Ping [port] host...");
return;
}
int firstArg = 0;
if (Pattern.matches("[0-9]+", args[0])) {
port = Integer.parseInt(args[0]);
firstArg = 1;
}
Printer printer = new Printer();
printer.start();
Connector connector = new Connector(printer);
connector.start();
LinkedList targets = new LinkedList();
for (int i = firstArg; i < args.length; i++) {
Target t = new Target(args[i]);
targets.add(t);
connector.add(t);
}
Thread.sleep(2000);
connector.shutdown();
connector.join();
for (Iterator i = targets.iterator(); i.hasNext();) {
Target t = (Target) i.next();
if (!t.shown)
t.show();
}
}
}
纯Java实现ICMP的ping命令.doc
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java使用rocksaw和vserv tcpip实现基于ICMP的Ping功能
一：准备 www.savarese.org download
1.  rocksaw-1.0.0-src.tar.gz
2.  vserv-tcpip-0.9.2-src.tar.gz
二：编译源文件得到jar包 使用Ant
1.  build vserv-tcpip-0.9.2-src
在vserv-tcpip-0.9.2目录下面建一个tests目录，然后在cmd窗口下进入vserv-tcpip-0.9.2-src目录，执行Ant all命令,相关的API、 class、jar包都生成好了，jar包在lib目录下
2. build rocksaw-1.0.0-src
ant all
错误原因:jdk version低于1.5
错误原因：build.properties 默认是使用linux/unix操作系统上的gcc和gmake
jni.make=gmake
jni.cc=gcc
解决：
#nmake工具去微软官网下一个修复版本nmake15.exe,运行 将NMAKE.EXE放到system32目录下
jni.make=nmake
#安装C++工具包 Microsoft Visual C++ Toolkit 2003,将bin、inlude、lib加入环境变量path中,这样就可以直接使用cl命令编译
jni.cc=cl
错误原因:jni.makefile=Makefile 这是linux/unix上的makefile
解决:jni.makefile=Makefile.win32 文件在\rocksaw-1.0.0\src\jni下
错误原因：可能是没有找到jdk目录下的include目录，erron.h是Microsoft Visual C++ Toolkit 2003\include下的
解决方法：将java环境变量JAVA_HOME改为JDK_HOME或者在Makefile.win32中直接修改 JAVA_INCDIR=$(JAVA_HOME)\include,然后将Microsoft Visual C++ Toolkit 2003\include下的erron.h拷贝到jdk\include下
错误原因：没有找到string.h
解决方法:在Makefile.win32中添加两个变量(CPP_HOME : Microsoft Platform SDK)
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importjava.io.*;importjava.net.*;importjava.nio.channels.*;importjava.util.*;importjava.util.regex.*;publicclassPing {staticintDAYTIME_PORT=13;staticintport=DAYTIME_PORT;staticclassTarget {
InetSocketAddress address;
SocketChannel channel;
Exception failure;longconnectStart;longconnectFinish=0;booleanshown=false;
Target(String host) {try{
address=newInetSocketAddress(InetAddress.getByName(host),
port);
}catch(IOException x) {
failure=x;
}
}voidshow() {
String result;if(connectFinish!=0)
result=Long.toString(connectFinish-connectStart)+"ms";elseif(failure!=null)
result=failure.toString();elseresult="Timed out";
System.out.println(address+":"+result);
shown=true;
}
}staticclassPrinterextendsThread {
LinkedList pending=newLinkedList();
Printer() {
setName("Printer");
setDaemon(true);
}voidadd(Target t) {synchronized(pending) {
pending.add(t);
pending.notify();
}
}publicvoidrun() {try{for(;;) {
Target t=null;synchronized(pending) {while(pending.size()==0)
pending.wait();
t=(Target) pending.removeFirst();
}
t.show();
}
}catch(InterruptedException x) {return;
}
}
}staticclassConnectorextendsThread {
Selector sel;
Printer printer;
LinkedList pending=newLinkedList();
Connector(Printer pr)throwsIOException {
printer=pr;
sel=Selector.open();
setName("Connector");
}voidadd(Target t) {
SocketChannel sc=null;try{
sc=SocketChannel.open();
sc.configureBlocking(false);booleanconnected=sc.connect(t.address);
t.channel=sc;
t.connectStart=System.currentTimeMillis();if(connected) {
t.connectFinish=t.connectStart;
sc.close();
printer.add(t);
}else{synchronized(pending) {
pending.add(t);
}
sel.wakeup();
}
}catch(IOException x) {if(sc!=null) {try{
sc.close();
}catch(IOException xx) {
}
}
t.failure=x;
printer.add(t);
}
}voidprocessPendingTargets()throwsIOException {synchronized(pending) {while(pending.size()>0) {
Target t=(Target) pending.removeFirst();try{
t.channel.register(sel, SelectionKey.OP_CONNECT, t);
}catch(IOException x) {
t.channel.close();
t.failure=x;
printer.add(t);
}
}
}
}voidprocessSelectedKeys()throwsIOException {for(Iterator i=sel.selectedKeys().iterator(); i.hasNext();) {
SelectionKey sk=(SelectionKey) i.next();
i.remove();
Target t=(Target) sk.attachment();
SocketChannel sc=(SocketChannel) sk.channel();try{if(sc.finishConnect()) {
sk.cancel();
t.connectFinish=System.currentTimeMillis();
sc.close();
printer.add(t);
}
}catch(IOException x) {
sc.close();
t.failure=x;
printer.add(t);
}
}
}volatilebooleanshutdown=false;voidshutdown() {
shutdown=true;
sel.wakeup();
}publicvoidrun() {for(;;) {try{intn=sel.select();if(n>0)
processSelectedKeys();
processPendingTargets();if(shutdown) {
sel.close();return;
}
}catch(IOException x) {
x.printStackTrace();
}
}
}
}publicstaticvoidmain(String[] args)throwsInterruptedException,
IOException {
args=newString[] {"8888","192.168.10.193"};if(args.length<1) {
System.err.println("Usage: java Ping [port] host...");return;
}intfirstArg=0;if(Pattern.matches("[0-9]+", args[0])) {
port=Integer.parseInt(args[0]);
firstArg=1;
}
Printer printer=newPrinter();
printer.start();
Connector connector=newConnector(printer);
connector.start();
LinkedList targets=newLinkedList();for(inti=firstArg; i
Target t=newTarget(args[i]);
targets.add(t);
connector.add(t);
}
Thread.sleep(2000);
connector.shutdown();
connector.join();for(Iterator i=targets.iterator(); i.hasNext();) {
Target t=(Target) i.next();if(!t.shown)
t.show();
}
}
}

package com.beijia.test;

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

public class Ping {

	public static boolean ping(String ipAddress) throws Exception{
		int timeOut=3000;
		boolean status=InetAddress.getByName(ipAddress).isReachable(timeOut);   // 当返回值是true时，说明host是可用的
		return status;
	}
	
	public static void ping02(String ipAddress){
		String line=null;
		
		try {
			Process pro=Runtime.getRuntime().exec("ping "+ipAddress);
			BufferedReader buf=new BufferedReader(new InputStreamReader(pro.getInputStream()));
			while((line=buf.readLine())!=null){
				System.out.println(line);
			}
		} catch (Exception e) {
			System.out.println(e.getMessage());
		}
	}
	
	public static boolean ping(String ipAddress,int pingTimes,int timeOut){
		BufferedReader in=null;
		Runtime r=Runtime.getRuntime();
		String pingCommand="ping "+ipAddress+" -n "+pingTimes+" -w "+timeOut;
		
		try {//执行命令并获取输出
			System.out.println(pingCommand);
			Process p=r.exec(pingCommand);
			if(p==null){
				return false;
			}
			in=new BufferedReader(new InputStreamReader(p.getInputStream()));
			int connectedCount=0;
			String line=null;
			while((line=in.readLine())!=null){
				connectedCount+=getCheckResult(line);
			}//如果出现类似=20ms TTL=22这样的字符，出现的次数=测试次数 则返回真
			return connectedCount==pingTimes;
		} catch (Exception e) {
			e.printStackTrace();//出现异常则返回假
			return false;
		}finally{
			try {
				in.close();
			} catch (IOException e) {
				e.printStackTrace();
			}	
		}
	}
	
	//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){
		Pattern pattern=Pattern.compile("(\\d+ms)(\\s+)(TTL=\\d+)",Pattern.CASE_INSENSITIVE);
	    Matcher matcher = pattern.matcher(line); 
	    while(matcher.find()){
	    	return 1;
	    }
	    return 0;
	}
	
	public static void main(String[] args) throws Exception{
		String ipAddress="192.168.20.58";
		System.out.println(ping(ipAddress));
		ping02(ipAddress);
		System.out.println(ping(ipAddress,5,5000));
	}
}