根据汉字取拼音首字母

 public class GetCh2Spell {

    public static int compare(String str1, String str2)

     {

         int result = 0;

         String m_s1 = null;

         String m_s2 = null;

         try

         {

             m_s1 = new String(str1.getBytes(_FromEncode_), _ToEncode_);

             m_s2 = new String(str2.getBytes(_FromEncode_), _ToEncode_);

         }

         catch(Exception e)

         {

             return str1.compareTo(str2);

         }

         result = chineseCompareTo(m_s1, m_s2);

         return result;

     }

     public static int getCharCode(String s)

     {

         if(s == null && s.equals(""))

             return -1;

         byte b[] = s.getBytes();

         int value = 0;

         for(int i = 0; i < b.length && i <= 2; i++)

             value = value * 100 + b[i];

         return value;

     }

     public static int chineseCompareTo(String s1, String s2)

     {

         int len1 = s1.length();

         int len2 = s2.length();

         int n = Math.min(len1, len2);

         for(int i = 0; i < n; i++)

         {

             int s1_code = getCharCode(s1.charAt(i) + "");

             int s2_code = getCharCode(s2.charAt(i) + "");

             if(s1_code * s2_code < 0)

                 return Math.min(s1_code, s2_code);

             if(s1_code != s2_code)

                 return s1_code - s2_code;

         }

         return len1 - len2;

     }

     public static String getBeginCharacter(String res)

     {

         String a = res;

         String result = "";

         for(int i = 0; i < a.length(); i++)

         {

             String current = a.substring(i, i + 1);

             if(compare(current, "/u554A") < 0)

                 result = result + current;

             else

             if(compare(current, "/u554A") >= 0 && compare(current, "/u5EA7") <= 0)

                 if(compare(current, "/u531D") >= 0)

                     result = result + "z";

                 else

                 if(compare(current, "/u538B") >= 0)

                     result = result + "y";

                 else

                 if(compare(current, "/u6614") >= 0)

                     result = result + "x";

                 else

                 if(compare(current, "/u6316") >= 0)

                     result = result + "w";

                 else

                 if(compare(current, "/u584C") >= 0)

                     result = result + "t";

                 else

                 if(compare(current, "/u6492") >= 0)

                     result = result + "s";

                 else

                 if(compare(current, "/u7136") >= 0)

                     result = result + "r";

                 else

                 if(compare(current, "/u671F") >= 0)

                     result = result + "q";

                 else

                 if(compare(current, "/u556A") >= 0)

                     result = result + "p";

                 else

                 if(compare(current, "/u54E6") >= 0)

                     result = result + "o";

                 else

                 if(compare(current, "/u62FF") >= 0)

                     result = result + "n";

                 else

                 if(compare(current, "/u5988") >= 0)

                     result = result + "m";

                 else

                 if(compare(current, "/u5783") >= 0)

                     result = result + "l";

                 else

                 if(compare(current, "/u5580") >= 0)

                     result = result + "k";

                 else

                 if(compare(current, "/u51FB") > 0)

                     result = result + "j";

                 else

                 if(compare(current, "/u54C8") >= 0)

                     result = result + "h";

                 else

                 if(compare(current, "/u5676") >= 0)

                     result = result + "g";

                 else

                 if(compare(current, "/u53D1") >= 0)

                     result = result + "f";

                 else

                 if(compare(current, "/u86FE") >= 0)

                     result = result + "e";

                 else

                 if(compare(current, "/u642D") >= 0)

                     result = result + "d";

                 else

                 if(compare(current, "/u64E6") >= 0)

                     result = result + "c";

                 else

                 if(compare(current, "/u82AD") >= 0)

                     result = result + "b";

                 else

                 if(compare(current, "/u554A") >= 0)

                     result = result + "a";

         }

         return result;

     }

     public static String getFirstStr(String str)

     {

         char a = str.charAt(0);

         char aa[] = {

             a

         };

         String sss = new String(aa);

         if(Character.isDigit(aa[0]))

             sss = "data";

         else

         if(a >= 'a' && a <= 'z' || a >= 'A' && a <= 'Z')

             sss = "character";

         else

             sss = getBeginCharacter(sss);

         return sss;

     }

     private static String _FromEncode_ = "GBK";

     private static String _ToEncode_ = "GBK";

    //测试

     public static void main(String args[])

     {

      GetCh2Spell obj = new GetCh2Spell();

      System.out.println(obj.getBeginCharacter("我是中国人"));

     }

}