Java IP地址字符串与BigInteger的转换, 支持IPv6
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/** * Copyright (c) 2010, 新浪网支付中心 * All rights reserved. * * Java IP地址字符串与BigInteger的转换, * 支持IPv6 * */ import java.math.BigInteger; import java.net.InetAddress; import java.net.UnknownHostException; /** * IP转换大数进行比较工具 * * @author yuchao1@staff.sina.com.cn * @since 2011-03-17 * */ public final class IpLimit { //存放IP范围的内引类 class IpRange{ private String[][] ipRange; public IpRange(String[][] ip ){ this .ipRange = ip; } public String getIpAt( int row, int column){ return ipRange[row][column]; } } /** * 防止被实例化 */ private IpLimit() { } /** * 将字符串形式的ip地址转换为BigInteger * * @param ipInString * 字符串形式的ip地址 * @return 整数形式的ip地址 */ public static BigInteger StringToBigInt(String ipInString) { ipInString = ipInString.replace( " " , "" ); byte [] bytes; if (ipInString.contains( ":" )) bytes = ipv6ToBytes(ipInString); else bytes = ipv4ToBytes(ipInString); return new BigInteger(bytes); } /** * 将整数形式的ip地址转换为字符串形式 * * @param ipInBigInt * 整数形式的ip地址 * @return 字符串形式的ip地址 */ public static String BigIntToString(BigInteger ipInBigInt) { byte [] bytes = ipInBigInt.toByteArray(); byte [] unsignedBytes = bytes; // 去除符号位 try { String ip = InetAddress.getByAddress(unsignedBytes).toString(); return ip.substring(ip.indexOf( '/' ) + 1 ).trim(); } catch (UnknownHostException e) { throw new RuntimeException(e); } } /** * ipv6地址转有符号byte[17] * @param ipv6 字符串形式的IP地址 * @return big integer number */ private static byte [] ipv6ToBytes(String ipv6) { byte [] ret = new byte [ 17 ]; ret[ 0 ] = 0 ; int ib = 16 ; boolean comFlag = false ; // ipv4混合模式标记 if (ipv6.startsWith( ":" )) // 去掉开头的冒号 ipv6 = ipv6.substring( 1 ); String groups[] = ipv6.split( ":" ); for ( int ig = groups.length - 1 ; ig > - 1 ; ig--) { // 反向扫描 if (groups[ig].contains( "." )) { // 出现ipv4混合模式 byte [] temp = ipv4ToBytes(groups[ig]); ret[ib--] = temp[ 4 ]; ret[ib--] = temp[ 3 ]; ret[ib--] = temp[ 2 ]; ret[ib--] = temp[ 1 ]; comFlag = true ; } else if ( "" .equals(groups[ig])) { // 出现零长度压缩,计算缺少的组数 int zlg = 9 - (groups.length + (comFlag ? 1 : 0 )); while (zlg-- > 0 ) { // 将这些组置0 ret[ib--] = 0 ; ret[ib--] = 0 ; } } else { int temp = Integer.parseInt(groups[ig], 16 ); ret[ib--] = ( byte ) temp; ret[ib--] = ( byte ) (temp >> 8 ); } } return ret; } /** * ipv4地址转有符号byte[5] * @param ipv4 字符串的IPV4地址 * @return big integer number */ private static byte [] ipv4ToBytes(String ipv4) { byte [] ret = new byte [ 5 ]; ret[ 0 ] = 0 ; // 先找到IP地址字符串中.的位置 int position1 = ipv4.indexOf( "." ); int position2 = ipv4.indexOf( "." , position1 + 1 ); int position3 = ipv4.indexOf( "." , position2 + 1 ); // 将每个.之间的字符串转换成整型 ret[ 1 ] = ( byte ) Integer.parseInt(ipv4.substring( 0 , position1)); ret[ 2 ] = ( byte ) Integer.parseInt(ipv4.substring(position1 + 1 , position2)); ret[ 3 ] = ( byte ) Integer.parseInt(ipv4.substring(position2 + 1 , position3)); ret[ 4 ] = ( byte ) Integer.parseInt(ipv4.substring(position3 + 1 )); return ret; } /** * * @param tip 要限制的Ip 包括Ipv6 * @param sip 限制的开始Ip * @param eip 限制的结束Ip * @return Boolean true通过 * false 受限制 */ public static boolean IsIp(String tip,String[][] myRange){ boolean flag = false ; //tbig 要测试的大数 BigInteger tbig = IpLimit.StringToBigInt(tip); int rangeLength = myRange.length; for ( int i= 0 ;i<rangeLength;i++) { for ( int j= 0 ;j<myRange[i].length;j++) { //开始大数sbig和ebig BigInteger sbig = IpLimit.StringToBigInt(myRange[i][j]); j = j+ 1 ; BigInteger ebig = IpLimit.StringToBigInt(myRange[i][j]); //将大数进行比较 //如果相等则退出循环 if ((tbig.compareTo(sbig)) == 0 ){ flag = true ; break ; } //如果不相等则比较大小,在区间内正常 if (((tbig.compareTo(sbig)) == 1 ) &&((tbig.compareTo(ebig)) == - 1 )){ flag = true ; break ; } } } return flag; } /** * 测试程序 * @param args */ public static void main(String args[]){ /* String ip = new String("192.168.0.1"); BigInteger number = IpLimit.StringToBigInt(ip); String sip = "192.168.10.0"; String eip = "192.168.10.255"; System.out.println("The number ="+number); boolean flag = false; flag = IpLimit.IsIp(ip, sip, eip); System.out.println("The int n="+flag); //System.out.println("the m ="+m); //String myip = IpLimit.BigIntToString(number); //System.out.println("The ipv4 ="+myip); String ip6 = "e80:a5eb:8fc8::7ec6:8027"; //String ip6 = "21DA:D3:AD:2F3B::9C5A"; BigInteger num = IpLimit.StringToBigInt(ip6); System.out.println("The Ipv6 number ="+num); String myip6 = IpLimit.BigIntToString(num); System.out.println("The IPv6 ="+myip6); */ //单IP限制必须写全两个 String[][] iplimit1 ={ { "192.168.0.1" , "192.168.0.255" }, { "10.210.71.0" , "10.210.71.255" }, { "202.106.182.158" , "202.106.182.158" } }; boolean flag = false ; String ip = "202.106.182.158" ; flag = IpLimit.IsIp(ip, iplimit1); System.out.println( "The first test =" +flag); String ip1 = "201.101.102.21" ; flag = IpLimit.IsIp(ip1, iplimit1); System.out.println( "The other test =" +flag); } } |
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/** * Copyright (c) 2010, 新浪网支付中心 * All rights reserved. * * Java IP地址字符串与BigInteger的转换, * 支持IPv6 * */ import java.math.BigInteger; import java.net.InetAddress; import java.net.UnknownHostException; /** * IP转换大数进行比较工具 * * @author yuchao1@staff.sina.com.cn * @since 2011-03-17 * */ public final class IpLimit { //存放IP范围的内引类 class IpRange{ private String[][] ipRange; public IpRange(String[][] ip ){ this .ipRange = ip; } public String getIpAt( int row, int column){ return ipRange[row][column]; } } /** * 防止被实例化 */ private IpLimit() { } /** * 将字符串形式的ip地址转换为BigInteger * * @param ipInString * 字符串形式的ip地址 * @return 整数形式的ip地址 */ public static BigInteger StringToBigInt(String ipInString) { ipInString = ipInString.replace( " " , "" ); byte [] bytes; if (ipInString.contains( ":" )) bytes = ipv6ToBytes(ipInString); else bytes = ipv4ToBytes(ipInString); return new BigInteger(bytes); } /** * 将整数形式的ip地址转换为字符串形式 * * @param ipInBigInt * 整数形式的ip地址 * @return 字符串形式的ip地址 */ public static String BigIntToString(BigInteger ipInBigInt) { byte [] bytes = ipInBigInt.toByteArray(); byte [] unsignedBytes = bytes; // 去除符号位 try { String ip = InetAddress.getByAddress(unsignedBytes).toString(); return ip.substring(ip.indexOf( '/' ) + 1 ).trim(); } catch (UnknownHostException e) { throw new RuntimeException(e); } } /** * ipv6地址转有符号byte[17] * @param ipv6 字符串形式的IP地址 * @return big integer number */ private static byte [] ipv6ToBytes(String ipv6) { byte [] ret = new byte [ 17 ]; ret[ 0 ] = 0 ; int ib = 16 ; boolean comFlag = false ; // ipv4混合模式标记 if (ipv6.startsWith( ":" )) // 去掉开头的冒号 ipv6 = ipv6.substring( 1 ); String groups[] = ipv6.split( ":" ); for ( int ig = groups.length - 1 ; ig > - 1 ; ig--) { // 反向扫描 if (groups[ig].contains( "." )) { // 出现ipv4混合模式 byte [] temp = ipv4ToBytes(groups[ig]); ret[ib--] = temp[ 4 ]; ret[ib--] = temp[ 3 ]; ret[ib--] = temp[ 2 ]; ret[ib--] = temp[ 1 ]; comFlag = true ; } else if ( "" .equals(groups[ig])) { // 出现零长度压缩,计算缺少的组数 int zlg = 9 - (groups.length + (comFlag ? 1 : 0 )); while (zlg-- > 0 ) { // 将这些组置0 ret[ib--] = 0 ; ret[ib--] = 0 ; } } else { int temp = Integer.parseInt(groups[ig], 16 ); ret[ib--] = ( byte ) temp; ret[ib--] = ( byte ) (temp >> 8 ); } } return ret; } /** * ipv4地址转有符号byte[5] * @param ipv4 字符串的IPV4地址 * @return big integer number */ private static byte [] ipv4ToBytes(String ipv4) { byte [] ret = new byte [ 5 ]; ret[ 0 ] = 0 ; // 先找到IP地址字符串中.的位置 int position1 = ipv4.indexOf( "." ); int position2 = ipv4.indexOf( "." , position1 + 1 ); int position3 = ipv4.indexOf( "." , position2 + 1 ); // 将每个.之间的字符串转换成整型 ret[ 1 ] = ( byte ) Integer.parseInt(ipv4.substring( 0 , position1)); ret[ 2 ] = ( byte ) Integer.parseInt(ipv4.substring(position1 + 1 , position2)); ret[ 3 ] = ( byte ) Integer.parseInt(ipv4.substring(position2 + 1 , position3)); ret[ 4 ] = ( byte ) Integer.parseInt(ipv4.substring(position3 + 1 )); return ret; } /** * * @param tip 要限制的Ip 包括Ipv6 * @param sip 限制的开始Ip * @param eip 限制的结束Ip * @return Boolean true通过 * false 受限制 */ public static boolean IsIp(String tip,String[][] myRange){ boolean flag = false ; //tbig 要测试的大数 BigInteger tbig = IpLimit.StringToBigInt(tip); int rangeLength = myRange.length; for ( int i= 0 ;i<rangeLength;i++) { for ( int j= 0 ;j<myRange[i].length;j++) { //开始大数sbig和ebig BigInteger sbig = IpLimit.StringToBigInt(myRange[i][j]); j = j+ 1 ; BigInteger ebig = IpLimit.StringToBigInt(myRange[i][j]); //将大数进行比较 //如果相等则退出循环 if ((tbig.compareTo(sbig)) == 0 ){ flag = true ; break ; } //如果不相等则比较大小,在区间内正常 if (((tbig.compareTo(sbig)) == 1 ) &&((tbig.compareTo(ebig)) == - 1 )){ flag = true ; break ; } } } return flag; } /** * 测试程序 * @param args */ public static void main(String args[]){ /* String ip = new String("192.168.0.1"); BigInteger number = IpLimit.StringToBigInt(ip); String sip = "192.168.10.0"; String eip = "192.168.10.255"; System.out.println("The number ="+number); boolean flag = false; flag = IpLimit.IsIp(ip, sip, eip); System.out.println("The int n="+flag); //System.out.println("the m ="+m); //String myip = IpLimit.BigIntToString(number); //System.out.println("The ipv4 ="+myip); String ip6 = "e80:a5eb:8fc8::7ec6:8027"; //String ip6 = "21DA:D3:AD:2F3B::9C5A"; BigInteger num = IpLimit.StringToBigInt(ip6); System.out.println("The Ipv6 number ="+num); String myip6 = IpLimit.BigIntToString(num); System.out.println("The IPv6 ="+myip6); */ //单IP限制必须写全两个 String[][] iplimit1 ={ { "192.168.0.1" , "192.168.0.255" }, { "10.210.71.0" , "10.210.71.255" }, { "202.106.182.158" , "202.106.182.158" } }; boolean flag = false ; String ip = "202.106.182.158" ; flag = IpLimit.IsIp(ip, iplimit1); System.out.println( "The first test =" +flag); String ip1 = "201.101.102.21" ; flag = IpLimit.IsIp(ip1, iplimit1); System.out.println( "The other test =" +flag); } } |
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