java 模拟Ping过程，用InetSocketAddress实现

[lxw886]

InetSocketAddress（InetAddress，port）
这里要Ping的主要的是交换机，所以不需要port这个参数，而port这个参数又是必须的，不知道有没有什么变通的方法
谢谢~

[lxw886]

自己先顶~

[欢乐极客]

重新写个类封装下呀

[「已注销」]

mark～

[lxw886]

继续等待好的方法~

[eve_zz]

用java.net.InetAddress类中的
public boolean isReachable(int timeout) throws IOException

[Mybeautiful]

[Quote=引用 4 楼 yueguangkai001 的回复:]
既然是ping就用ping来做萨

Java code

private String pingIP(String IP)
{
BufferedReader in = null;
Runtime rt = Runtime.getRuntime();
boolean FoundMatch = false;
St……
[/Quote]

只能这样，楼主，我已经尝试很多次了....这是唯一的方案,目前为止我发现可行的。

[yueguangkai001]

既然是ping就用ping来做萨

private String pingIP(String IP)
    {
        BufferedReader in = null;
        Runtime rt = Runtime.getRuntime();
        boolean FoundMatch = false;
        String pingCommand = "ping " + IP + " -w " + 3000;
        try
        {
            Process pro = rt.exec(pingCommand);
            in = new BufferedReader(new InputStreamReader(pro.getInputStream()));
            String line = in.readLine();
            while (line != null)
            {

                try
                {
                    Pattern Regex = Pattern.compile("(T|t){2}(L|l)",
                            Pattern.CANON_EQ);
                    Matcher RegexMatcher = Regex.matcher(line);
                    FoundMatch = RegexMatcher.find();
                    if (FoundMatch)
                    {
                        pro.destroy();
                        return IP.trim();
                    }
                }
                catch (PatternSyntaxException ex)
                {
                    // Syntax error in the regular expression
                    ex.getMessage();
                }
                line = in.readLine();
            }
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            Debug.printExc(e.getMessage());
        }
        return null;
    }

[氧气网航]

顶楼上的

[b11ght]

import java.io.*;
import java.net.*;
import java.nio.*;
import java.nio.channels.*;
import java.nio.charset.*;
import java.util.*;
import java.util.regex.*;


public class Ping {

    // The default daytime port
    static int DAYTIME_PORT = 13;

    // The port we'll actually use
    static int port = DAYTIME_PORT;


    // Representation of a ping target
    // 
    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;
	}

    }


    // Thread for printing targets as they're heard from
    //
    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;
	    }
	}

    }


    // Thread for connecting to all targets in parallel via a single selector
    // 
    static class Connector
	extends Thread
    {
	Selector sel;
	Printer printer;

	// List of pending targets.  We use this list because if we try to
	// register a channel with the selector while the connector thread is
	// blocked in the selector then we will block.
	//
	LinkedList pending = new LinkedList();

	Connector(Printer pr) throws IOException {
	    printer = pr;
	    sel = Selector.open();
	    setName("Connector");
	}

	// Initiate a connection sequence to the given target and add the
	// target to the pending-target list
	//
	void add(Target t) {
	    SocketChannel sc = null;
	    try {

		// Open the channel, set it to non-blocking, initiate connect
		sc = SocketChannel.open();
		sc.configureBlocking(false);

		boolean connected = sc.connect(t.address);

		// Record the time we started
		t.channel = sc;
		t.connectStart = System.currentTimeMillis();

		if (connected) {
		    t.connectFinish = t.connectStart;
		    sc.close();
		    printer.add(t);
		} else {
		    // Add the new channel to the pending list
		    synchronized (pending) {
		        pending.add(t);
		    }

		    // Nudge the selector so that it will process the pending list
		    sel.wakeup();
		}
	    } catch (IOException x) {
		if (sc != null) {
		    try {
			sc.close();
		    } catch (IOException xx) { }
		}
		t.failure = x;
		printer.add(t);
	    }
	}

	// Process any targets in the pending list
	//
	void processPendingTargets() throws IOException {
	    synchronized (pending) {
		while (pending.size() > 0) {
		    Target t = (Target)pending.removeFirst();
		    try {

			// Register the channel with the selector, indicating
			// interest in connection completion and attaching the
			// target object so that we can get the target back
			// after the key is added to the selector's
			// selected-key set
			t.channel.register(sel, SelectionKey.OP_CONNECT, t);

		    } catch (IOException x) {

			// Something went wrong, so close the channel and
			// record the failure
			t.channel.close();
			t.failure = x;
			printer.add(t);

		    }

		}
	    }
	}

	// Process keys that have become selected
	//
	void processSelectedKeys() throws IOException {
	    for (Iterator i = sel.selectedKeys().iterator(); i.hasNext();) {

		// Retrieve the next key and remove it from the set
		SelectionKey sk = (SelectionKey)i.next();
		i.remove();

		// Retrieve the target and the channel
		Target t = (Target)sk.attachment();
		SocketChannel sc = (SocketChannel)sk.channel();

		// Attempt to complete the connection sequence
		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;

	// Invoked by the main thread when it's time to shut down
	//
	void shutdown() {
	    shutdown = true;
	    sel.wakeup();
	}

	// Connector loop
	//
	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
    {
	if (args.length < 1) {
	    System.err.println("Usage: java Ping [port] host...");
	    return;
	}
	int firstArg = 0;

	// If the first argument is a string of digits then we take that
	// to be the port number to use
	if (Pattern.matches("[0-9]+", args[0])) {
	    port = Integer.parseInt(args[0]);
	    firstArg = 1;
	}

	// Create the threads and start them up
	Printer printer = new Printer();
	printer.start();
	Connector connector = new Connector(printer);
	connector.start();

	// Create the targets and add them to the connector
	LinkedList targets = new LinkedList();
	for (int i = firstArg; i < args.length; i++) {
	    Target t = new Target(args[i]);
	    targets.add(t);
	    connector.add(t);
	}

	// Wait for everything to finish
	Thread.sleep(2000);
	connector.shutdown();
	connector.join();

	// Print status of targets that have not yet been shown
	for (Iterator i = targets.iterator(); i.hasNext();) {
	    Target t = (Target)i.next();
	    if (!t.shown)
		t.show();
	}

    }

}

[lxw886]

[Quote=引用 4 楼 yueguangkai001 的回复:]
既然是ping就用ping来做萨

Java code

private String pingIP(String IP)
{
BufferedReader in = null;
Runtime rt = Runtime.getRuntime();
boolean FoundMatch = false;
St……
[/Quote]

用这个方法是简单，但是当要求单位时间ping大量ip的话，只能通过增开线程的方法，我想通过开较少线程数来ping大量的IP，所以想到了用InetSocketAddress，继续等待高人.....

[lxw886]

[Quote=引用 6 楼 b11ght 的回复:]
Java code

import java.io.*;
import java.net.*;
import java.nio.*;
import java.nio.channels.*;
import java.nio.charset.*;
import java.util.*;
import java.util.regex.*;


public class Ping {……
[/Quote]
你贴的这个方法就是我现在想改进的，如果说address = new InetSocketAddress(InetAddress.getByName(host),port);中port变量不输入的话程序是有错的，而ping交换机是不用port的.....

[yueguangkai001]

[Quote=引用 7 楼 lxw886 的回复:]
用这个方法是简单，但是当要求单位时间ping大量ip的话，只能通过增开线程的方法，我想通过开较少线程数来ping大量的IP，所以想到了用InetSocketAddress，继续等待高人.....
[/Quote]
貌似之前也有个人讨论了这样的一个东西
帖子http://topic.csdn.net/u/20100422/11/e69924f6-d6ca-43d3-86f4-498b9400d593.html
你去问问他有好的方案么

[lxw886]

貌似之前也有个人讨论了这样的一个东西
帖子http://topic.csdn.net/u/20100422/11/e69924f6-d6ca-43d3-86……
[/Quote]
先谢谢了~

[mouer]

sun官方的,参考下吧
http://java.sun.com/j2se/1.5.0/docs/guide/nio/example/Ping.java

[「已注销」]

http://topic.csdn.net/u/20090604/01/5BF7D420-5CA9-4962-9135-A2E50A3CF28C.html
这个帖子里介绍了Ping的Java实现

[zhentengai]

自己重写.

把port给封装一下.

我先去试试

[only_xxp]

学习了