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

package netManager.discovery; 
 
/** 
 * 
Title: PingIP 
 
 * 
Description: 返回ping目标的IP地址(该子网内可能存在的所有主机IP地址)集合 
 
 * 
Copyright: Copyright (c) 2006 
 
 * 
Company: 
 
 * @author：谢飞 
 * @version 1.0 
 */ 
  
 import java.util.Vector; 
 import org.apache.commons.logging.Log; 
 import org.apache.commons.logging.LogFactory; 
 import netManager.framework.exception.BaseException; 
  
 public class PingIP{ 
 	 
 	int hostAccount; 
 	String subnetAddress; 
 	Vector IPAddress; 
 	private Log log = LogFactory.getLog("PingIP"); 
 	 
 	public PingIP() throws BaseException{ 
 		hostAccount = DiscoveryUtil.getMaxHosts();				//得到估算主机数 
 	  	subnetAddress = DiscoveryUtil.getSubnetAddress(); 		//得到子网地址	 
 		IPAddress = new Vector(); 
 	} 
 	 
 	/** 
 	 *求子网中所有主机IP地址方法如下:(针对C类网) 
 	 *1.如果主机数小于254，直接在子网IP地址的第四段(P4)分别累加至254,如：子网IP为192.168.0.0,掩码为：255.255.255.0 
 	 *  ,算得主机数为:254,则该子网内的主机IP为:192.168.0.1-----192.168.0.254 
 	 *2.如果主机数大于254，每当P4累加至254时，子网地址的第三部分(P3)加1，并将P4置零，再重新累加P4. 
 	 *	如:子网IP为192.168.128.0,掩码为:255.255.128.0,则该子网内的主机IP地址为:192.168.128.1---192.168.255.254 
 	 */ 
 	public Vector getPingIP(){ 
 		try{ 
 			int [] subAddPart = Convert.getPartIP(subnetAddress); 
 			String strIP; 
 			double tempD = hostAccount/254;							//计算是否需要加子网地址的P3部分，tempD>1需要，tempD=1不需要 
 			System.out.print(tempD); 
 			int tempI = new Double(tempD).intValue(); 
 			for(int i=1; i<=tempD; i++){ 
 				if(i>1){											//i>1表示需要外循环，即主机数超过254，P4部分不够加 
 					subAddPart[2] = subAddPart[2] + 1;				//子网地址P4加到254后，P3加1，并将P4置零		 
 				}	 
 				subAddPart[3] = 0; 
 				for(int j=1; j<=254; j++){ 
 					subAddPart[3] = subAddPart[3] + 1;				//在子网地址P4依次加1 
 					strIP = (new Integer(subAddPart[0])).toString() + "." + (new Integer(subAddPart[1])).toString() + "."  
 							+ (new Integer(subAddPart[2])).toString() + "." + (new Integer(subAddPart[3])).toString(); 
 					IPAddress.addElement(strIP); 
 					//log.debug(strIP); 
 				} 
 			} 
 		 
 		} 
 		catch(Exception e){ 
 			e.printStackTrace(); 
 			log.error(e); 
 		} 
 		return IPAddress; 
 	} 
 	 
 }