hosthelper.java

来自「这是一个以JAVA编写的程序,本人还没有试过,是一个简单的温度控制系统」· Java 代码 · 共 46 行

package net.sf.dz.util;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;

public class HostHelper {

    public static boolean isLocalAddress(String address) throws SocketException, UnknownHostException {
    
        InetAddress targetAddress = InetAddress.getByName(address);
    
        // Since the network configuration is dynamic, we'd rather collect
        // the addresses right now
        
        return getLocalAddresses().contains(targetAddress);
    }
    
    public static final Set getLocalAddresses() throws SocketException {
    
        Set result = new HashSet();
    
        for ( Enumeration e = NetworkInterface.getNetworkInterfaces(); e.hasMoreElements(); ) {
        
            NetworkInterface ni = (NetworkInterface)e.nextElement();
            
            //complain(LOG_ALERT, getLogChannel(), "Interface: " + ni.getDisplayName());
            
            for ( Enumeration e2 = ni.getInetAddresses(); e2.hasMoreElements(); ) {
            
                InetAddress niAddress = (InetAddress)e2.nextElement();
                
                //complain(LOG_ALERT, getLogChannel(), "Address: " + niAddress);
                
                result.add(niAddress);
            }
        }
        
        return result;
    }
}