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

package netManager.discovery; 
 
/** 
 * 
Title: Convert 
 
 * 
Description: IP地址各种转化
 
 * 
Copyright: Copyright (c) 2006 
 
 * 
Company: 
 
 * @author：谢飞 
 * @version 1.0 
 */ 
  
 public final class Convert{ 
 	 
 	/** 
 	 *将IP地址转化位二进制 
 	 */ 
 	public static String toBinary(String strIP){ 
		long [] ip=new long[4];  
		int position1=strIP.indexOf(".");  
		int position2=strIP.indexOf(".",position1+1);  
		int position3=strIP.indexOf(".",position2+1);  
		ip[0]=Long.parseLong(strIP.substring(0,position1));  
		ip[1]=Long.parseLong(strIP.substring(position1+1,position2));  
		ip[2]=Long.parseLong(strIP.substring(position2+1,position3));  
		ip[3]=Long.parseLong(strIP.substring(position3+1));  
		Long longIP = (ip[0]<<24)+(ip[1]<<16)+(ip[2]<<8)+ip[3]; 	//将十进制数的前三个八位分别往左移24，16，8位	  
		return Long.toBinaryString(longIP); 
 	} 
 	 
 	/** 
 	 *将十进制数转换位IP地址 
 	 */ 
 	public static String toIP(Long longIP){ 
 		StringBuffer sb=new StringBuffer("");  
		sb.append(String.valueOf(longIP>>>24));						//直接右移24位 
		sb.append(".");  
		sb.append(String.valueOf((longIP&0x00FFFFFF)>>>16)); 		//将高8位置0，然后右移16位 
		sb.append(".");  
		sb.append(String.valueOf((longIP&0x0000FFFF)>>>8));  
		sb.append(".");  
		sb.append(String.valueOf(longIP&0x000000FF));  
		return sb.toString();  
 	} 
 	 
 	/** 
 	 *将IP地址转换位十进制长整数 
 	 */ 
 	public static Long toDecimalist(String strIP){ 
		long [] ip=new long[4];  
		int position1=strIP.indexOf(".");  
		int position2=strIP.indexOf(".",position1+1);  
		int position3=strIP.indexOf(".",position2+1);  
		ip[0]=Long.parseLong(strIP.substring(0,position1));  
		ip[1]=Long.parseLong(strIP.substring(position1+1,position2));  
		ip[2]=Long.parseLong(strIP.substring(position2+1,position3));  
		ip[3]=Long.parseLong(strIP.substring(position3+1));  
		Long longIP = (ip[0]<<24)+(ip[1]<<16)+(ip[2]<<8)+ip[3];  
		return longIP;		 
 	} 
 	 
 	/** 
 	 *返回保存IP地址中的4部分十进制数的数组 
 	 */ 
 	 public static int [] getPartIP(String strIP){ 
 	 	int [] ip=new int[4];  
		int position1=strIP.indexOf(".");  
		int position2=strIP.indexOf(".",position1+1);  
		int position3=strIP.indexOf(".",position2+1);  
		ip[0]=Integer.parseInt(strIP.substring(0,position1));  
		ip[1]=Integer.parseInt(strIP.substring(position1+1,position2));  
		ip[2]=Integer.parseInt(strIP.substring(position2+1,position3));  
		ip[3]=Integer.parseInt(strIP.substring(position3+1)); 	  
		return ip; 
 	 } 
 	  
 }