获得汉字拼音首字母的java工具类

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";

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