java获取汉字拼音首字母 --转载

在项目中要更能根据某些查询条件（比如姓名）的首字母作为条件进行查询，比如查一个叫“李晓明”的人，可以输入‘lxm'。写了一个工具类如下：

import java.io.UnsupportedEncodingException;

/**
* 取得给定汉字串的首字母串,即声母串
* Title: ChineseCharToEn
* @date 2004-02-19 注：只支持GB2312字符集中的汉字
*/
public final class ChineseCharToEn {
private final static int[] li_SecPosValue = { 1601, 1637, 1833, 2078, 2274,
2302, 2433, 2594, 2787, 3106, 3212, 3472, 3635, 3722, 3730, 3858,
4027, 4086, 4390, 4558, 4684, 4925, 5249, 5590 };
private final static String[] lc_FirstLetter = { "a", "b", "c", "d", "e",
"f", "g", "h", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s",
"t", "w", "x", "y", "z" };
/**
* 取得给定汉字串的首字母串,即声母串
* @param str 给定汉字串
* @return 声母串
*/

public String getAllFirstLetter(String str) {

if (str == null || str.trim().length() == 0) {
return "";
}
String _str = "";
for (int i = 0; i < str.length(); i++) {
_str = _str + this.getFirstLetter(str.substring(i, i + 1));
}
return _str;
}
/**
* 取得给定汉字的首字母,即声母
* @param chinese 给定的汉字
* @return 给定汉字的声母
*/
public String getFirstLetter(String chinese) {
if (chinese == null || chinese.trim().length() == 0) {
return "";
}
chinese = this.conversionStr(chinese, "GB2312", "ISO8859-1");
if (chinese.length() > 1) // 判断是不是汉字
{
int li_SectorCode = (int) chinese.charAt(0); // 汉字区码
int li_PositionCode = (int) chinese.charAt(1); // 汉字位码
li_SectorCode = li_SectorCode - 160;
li_PositionCode = li_PositionCode - 160;
int li_SecPosCode = li_SectorCode * 100 + li_PositionCode; // 汉字区位码
if (li_SecPosCode > 1600 && li_SecPosCode < 5590) {
for (int i = 0; i < 23; i++) {
if (li_SecPosCode >= li_SecPosValue[i]
&& li_SecPosCode < li_SecPosValue[i + 1]) {
chinese = lc_FirstLetter[i];
break;
}
}
} else // 非汉字字符,如图形符号或ASCII码
{
chinese = this.conversionStr(chinese, "ISO8859-1", "GB2312");
chinese = chinese.substring(0, 1);
}
}
return chinese;
}
/**
* 字符串编码转换
* @param str 要转换编码的字符串
* @param charsetName 原来的编码
* @param toCharsetName 转换后的编码
* @return 经过编码转换后的字符串
*/
private String conversionStr(String str, String charsetName,String toCharsetName) {
try {
str = new String(str.getBytes(charsetName), toCharsetName);
} catch (UnsupportedEncodingException ex) {
System.out.println("字符串编码转换异常：" + ex.getMessage());
}
return str;
}
public static void main(String[] args) {
ChineseCharToEn cte = new ChineseCharToEn();
System.out.println("获取拼音首字母："+ cte.getAllFirstLetter("北京联席办"));
}
}

博客原文：http://blog.csdn.net/fei1502816/article/details/8446049/