电话号码压缩方法

/** * 电话号码采用62进制压缩方法工具 * @author XuGuo * @since 2013-3-9 */public class TelephoneCompressUtil {private static char[] bit62 = new char[]{'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};/** * @param args */public static void main(String[] args) {String telephoneNumberStr = "18957124766";long telephoneNumber = Long.parseLong(telephoneNumberStr);System.out.println(telephoneNumber);String abc = digit10to16(telephoneNumber);System.out.println("十进制数转换成六十二进制数结尾为："+abc);System.out.println("六十二进制数转换成十进制数结尾为："+digit16to10(abc));}/** * 十进制数(18957124766)转换成六十二进制数(kGWa8S) * 18957124766除以62等于305760076;  18957124766除以62取余54 * 305760076除以62等于4931614;  305760076除以62取余8 * 4931614除以62等于79542;  4931614除以62取余10 * 79542除以62等于1282;  79542除以62取余58 * 1282除以62等于20;  1282除以62取余42 * 20除以62等于0;  20除以62取余20 * @param source10digit * @return */public static String digit10to16(long source10digit){StringBuffer sb = new StringBuffer();long b = divisionBy62(source10digit);int a = modBy62(source10digit);long temp = 0;System.out.println(source10digit+"除以62等于"+b+";  "+source10digit+"除以62取余"+a);while(b>0){sb.append(bit62[a]);temp = b;a = modBy62(b);b = divisionBy62(b);System.out.println(temp+"除以62等于"+b+";  "+temp+"除以62取余"+a);}sb.append(bit62[a]);String abc = sb.reverse().toString();return abc;}/** * 对十进制数除以62 * @param dividend * @return */private static long divisionBy62(long dividend){return dividend/62;}/** * 对十进制数除以62取余 * @param dividend * @return */private static int modBy62(long dividend){return (int)(dividend%62);}/** * 获取六十二进制数字符在该进制规范中的顺序编号 * @param a * @return */private static int digit16by10(char a){for(int i = 0;i<bit62.length;i++){if(a == bit62[i]){return i;}}return 0;}/** * 六十二进制数(kGWa8S)转换成十进制数结(18957124766) * 20(k)*62^5=18322656640 * 42(G)*62^4=620606112 * 58(W)*62^3=13823024 * 10(a)*62^2=38440 * 8(8)*62^1=496 * 54(S)*62^0=54 * @param str * @return */public static long digit16to10(String str){if(str==null||"".equals(str.trim())){return 0;}else{long a = 0;int strLen = str.length();for(int i=0;i<strLen;i++){//System.out.println(digit16by10((char)str.charAt(i))+"("+str.charAt(i)+")*"+"62^"+(strLen-i-1)+"="+(digit16by10((char)str.charAt(i))*(long)Math.pow(62,strLen-i-1)));a = a+digit16by10((char)str.charAt(i))*(long)Math.pow(62,strLen-i-1);}return a;}}}