Java_獲取漢字的漢語拼音首字母Java版

public class GetFirstLetter {

 private static final int GB_SP_DIFF = 160;
 private static final int[] secPosvalueList = {
       1601, 1637, 1833, 2078, 2274, 2302, 2433, 2594, 2787,
       3106, 3212, 3472, 3635, 3722, 3730, 3858, 4027, 4086,
       4390, 4558, 4684, 4925, 5249, 5600};
 private static final char[] firstLetter = {
       'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'j',
       'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's',
       't', 'w', 'x', 'y', 'z'};

 public static String getFirstLetter(String oriStr) {
     String str = oriStr.toLowerCase();
     StringBuffer buffer = new StringBuffer();
     char ch;
     char[] temp;
     for (int i = 0; i < str.length(); i++) { 
       ch = str.charAt(i);
       temp = new char[] {
           ch};
       byte[] uniCode = new String(temp).getBytes();
       if (uniCode[0] < 128 && uniCode[0] > 0) {
         buffer.append(temp);
       }
       else {
         buffer.append(convert(uniCode));
       }
     }
     return buffer.toString().substring(0,1);
 }

 private static char convert(byte[] bytes) {

     char result = '-';
     int secPosvalue = 0;
     int i;
     for (i = 0; i < bytes.length; i++) {
       bytes[i] -= GB_SP_DIFF;
     }
     secPosvalue = bytes[0] * 100 + bytes[1];
     for (i = 0; i < 23; i++) {
       if (secPosvalue >= secPosvalueList[i] &&
           secPosvalue < secPosvalueList[i + 1]) {
         result = firstLetter[i];
         break;
       }
     }
     return result;
 }
 
 public static void main(String s[]){
  
  System.out.print(getFirstLetter("好"));
 }