www.pudn.com > network-java.rar > SubnetAddress.java

package netManager.discovery; 
 
/** 
 * 
Title: SubnetAddress 
 
 * 
Description: 获得子网地址
 
 * 
Copyright: Copyright (c) 2006 
 
 * 
Company: 
 
 * @author：谢飞 
 * @version 1.0 
 */ 
  
 import java.net.InetAddress; 
 import java.net.UnknownHostException; 
 import org.apache.commons.logging.Log; 
 import org.apache.commons.logging.LogFactory; 
 import netManager.framework.exception.BaseException; 
 	 
 public class SubnetAddress{ 
 	 
 	String subnetMask;				//子网掩码 
 	String subnetAddress;			//本机所在子网地址 
 	String localIP ;	//本机地址 		 
 	private Log log = LogFactory.getLog("SubnetAddress"); 
 	 
 	public SubnetAddress() throws BaseException{ 
 		try{ 
			//localSubnetMask = LocalSubnetMask.getSubnetMask(); 
			subnetMask = SubnetMask.getSubnetMask(); 
			localIP = InetAddress.getLocalHost().getHostAddress(); 
			//subnetMask = "255.255.255.0"; 
			//localIP = "192.168.0.1"; 
			} 
		catch(Exception e){ 
			log.error(e); 
			BaseException be = new BaseException(); 
			be.setMessageKey("error.subadd.error"); 
			be.setRootCause(e); 
			throw be; 
		} 
 	} 
 	 
 	//获得子网地址 
 	public String getSubnetAddress(){ 
 		try{ 
 			Long longSubnetMask = Convert.toDecimalist(subnetMask);		//将子网掩码转换位长整型 
 			Long longLocalIP = Convert.toDecimalist(localIP); 
 			Long longSubnetAddress = longSubnetMask & longLocalIP;		//子网地址 = 本机地址 & 子网掩码 
 			subnetAddress = Convert.toIP(longSubnetAddress); 
 			//System.out.println("子网地址为:" + subnetAddress);			 
 		} 
 		catch(Exception e){ 
 			//BaseException be = new BaseException(); 
 			//be.setRootCause(e); 
 			log.error(e); 
 			//throw be; 
 		} 
 		return subnetAddress; 
 	} 
 
 }