拼音转换类

import java.io.UnsupportedEncodingException;

/**
 * 拼音转换类
 * 
 * @author  
 * 
 */
public class CnToSpellUtil {

	/**
	 * 将字符串转换为拼音
	 * 
	 * @param cnStr
	 *            要转换的内容
	 * @return 拼音
	 */
	public static String toSpell(String cnStr) {
		if (StringUtil.isEmpty(cnStr))
			return cnStr;

		char[] chars = cnStr.toCharArray();
		StringBuffer retuBuf = new StringBuffer();
		for (int i = 0, Len = chars.length; i < Len; i++) {
			String ascii = getCnAscii(chars[i]);
			if (ascii.length() == 0) {
				retuBuf.append(chars[i]);
			} else {
				String spell = getSpellByAscii(ascii);
				if (spell == null) {
					char firstChar = chars[i];
					if ((firstChar >= 48 && firstChar <= 57)
							|| (firstChar >= 65 && firstChar <= 90)
							|| (firstChar >= 97 && firstChar <= 122)) {
						retuBuf.append(firstChar);
					}
				} else {
					retuBuf.append(spell);
				}
			}
		}

		return retuBuf.toString();
	}

	/**
	 * 将每个分词的首字符转换为拼音
	 * 
	 * @param cnStr
	 *            要转换的内容
	 * @return 各分词首字母拼音
	 */
	public static String getFirstSpell(String cnStr) {
		if (StringUtil.isEmpty(cnStr))
			return cnStr;

		char[] chars = cnStr.toCharArray();
		StringBuffer retuBuf = new StringBuffer();
		for (int i = 0, Len = chars.length; i < Len; i++) {
			String ascii = getCnAscii(chars[i]);
			char firstChar;
			if (ascii.length() == 1) {
				firstChar = chars[i];
			} else {
				String spell = getSpellByAscii(ascii);
				if (spell == null || "".equals(cnStr.trim())) {
					firstChar = chars[i];
				} else {
					try {
						firstChar = spell.charAt(0);
					} catch (Exception e) {
						firstChar = " ".toCharArray()[0];
						// e.printStackTrace();
					}

				}
			}
			if ((firstChar >= 48 && firstChar <= 57)
					|| (firstChar >= 65 && firstChar <= 90)
					|| (firstChar >= 97 && firstChar <= 122)) {
				retuBuf.append(firstChar);
			}
		}
		return retuBuf.toString();
	}

	/**
	 * 将字符串的首字母转换为拼音
	 * 
	 * @param cnStr
	 *            要转换的内容
	 * @return 首字母拼音
	 */
	public static String getFirstWordSpell(String cnStr) {
		if (StringUtil.isEmpty(cnStr))
			return cnStr;

		char[] chars = cnStr.toCharArray();
		for (int i = 0, Len = chars.length; i < Len; i++) {
			String ascii = getCnAscii(chars[i]);
			if (ascii.length() == 1) {
				return ascii;
			} else {

				String spell = getSpellByAscii(ascii);

				if (spell == null || "".equals(cnStr.trim())) {
					continue;
				} else {
					return String.valueOf(spell.charAt(0));
				}
			}
		}
		return "";
	}

	private static String getCnAscii(char cn) {
		byte[] bytes;
		try {
			bytes = (String.valueOf(cn)).getBytes("GBK");
			if (bytes == null || bytes.length > 2 || bytes.length <= 0) {
				return "";
			}
			if (bytes.length == 1) {
				return new String(bytes);
			}
			if (bytes.length == 2) {
				int hightByte = 256 + bytes[0];
				int lowByte = 256 + bytes[1];

				String ascii = hightByte + "-" + lowByte;

				return ascii;
			}
		} catch (UnsupportedEncodingException e) {
			return "";
		}

		return "";
	}

	private static String getSpellByAscii(String ascii) {
		if (ascii.indexOf("-") > -1) {
			return (String) CnAsciiLib.spellMap.get(ascii);
		} else {
			return ascii;
		}
	}

}