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/