Translit.java

package com.iambookmaster.server;

/**
 * Класс переводит русский текст в транслит. Например, строка "Текст" будет
 * преобразована в "Tekst".
 * User: Deady
 * Date: 04.12.2007
 * Time: 15:56:47
 * http://www.sql.ru/forum/actualthread.aspx?bid=38&tid=502128&pg=2
 */
public class Translit {

	    private static final String[] charTable = new String[81];

	    private static final char START_CHAR = 'Ё';

	    static {
	        charTable['А'- START_CHAR] = "A";
	        charTable['Б'- START_CHAR] = "B";
	        charTable['В'- START_CHAR] = "V";
	        charTable['Г'- START_CHAR] = "G";
	        charTable['Д'- START_CHAR] = "D";
	        charTable['Е'- START_CHAR] = "E";
	        charTable['Ё'- START_CHAR] = "E";
	        charTable['Ж'- START_CHAR] = "ZH";
	        charTable['З'- START_CHAR] = "Z";
	        charTable['И'- START_CHAR] = "I";
	        charTable['Й'- START_CHAR] = "I";
	        charTable['К'- START_CHAR] = "K";
	        charTable['Л'- START_CHAR] = "L";
	        charTable['М'- START_CHAR] = "M";
	        charTable['Н'- START_CHAR] = "N";
	        charTable['О'- START_CHAR] = "O";
	        charTable['П'- START_CHAR] = "P";
	        charTable['Р'- START_CHAR] = "R";
	        charTable['С'- START_CHAR] = "S";
	        charTable['Т'- START_CHAR] = "T";
	        charTable['У'- START_CHAR] = "U";
	        charTable['Ф'- START_CHAR] = "F";
	        charTable['Х'- START_CHAR] = "H";
	        charTable['Ц'- START_CHAR] = "C";
	        charTable['Ч'- START_CHAR] = "CH";
	        charTable['Ш'- START_CHAR] = "SH";
	        charTable['Щ'- START_CHAR] = "SH";
	        charTable['Ъ'- START_CHAR] = "'";
	        charTable['Ы'- START_CHAR] = "Y";
	        charTable['Ь'- START_CHAR] = "'";
	        charTable['Э'- START_CHAR] = "E";
	        charTable['Ю'- START_CHAR] = "U";
	        charTable['Я'- START_CHAR] = "YA";

	        for (int i = 0; i < charTable.length; i++) {
	            char idx = (char)((char)i + START_CHAR);
	            char lower = new String(new char[]{idx}).toLowerCase().charAt(0);
	            if (charTable[i] != null) {
	                charTable[lower - START_CHAR] = charTable[i].toLowerCase();
	            }
	        }
	    }


	    /**
	     * Переводит русский текст в транслит. В результирующей строке
	     * каждая русская буква будет заменена на соответствующую английскую.
	     * Не русские символы останутся прежними.
	     *
	     * @param text исходный текст с русскими символами
	     * @return результат
	     */
	    public static String toTranslit(String text) {
	        char charBuffer[] = text.toCharArray();
	        StringBuilder sb = new StringBuilder(text.length());
	        for (char symbol : charBuffer) {
	            int i = symbol - START_CHAR;
	            if (i>=0 && i<charTable.length) {
	                String replace = charTable[i];
	                sb.append(replace == null ? symbol : replace);
	            }
	            else {
	                sb.append(symbol);
	            }
	        }
	        return sb.toString();
	    }


	}