使用Java取得汉字的拼音首字母

package sample;

public class GB2Alpha ...{

//字母Z使用了两个标签，这里有２７个值
//i, u, v都不做声母, 跟随前面的字母
private char[] chartable =
...{
'啊', '芭', '擦', '搭', '蛾', '发', '噶', '哈', '哈',
'击', '喀', '垃', '妈', '拿', '哦', '啪', '期', '然',
'撒', '塌', '塌', '塌', '挖', '昔', '压', '匝', '座'
};

private char[] alphatable =
...{
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I',
'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
};

private int[] table = new int[27];
//初始化
...{
for (int i = 0; i < 27; ++i) ...{
table[i] = gbValue(chartable[i]);
}
}

public GB2Alpha() ...{
}

//主函数,输入字符,得到他的声母,
//英文字母返回对应的大写字母
//其他非简体汉字返回 '0'

public char Char2Alpha(char ch) ...{

if (ch >= 'a' && ch <= 'z')
return (char) (ch - 'a' + 'A');
if (ch >= 'A' && ch <= 'Z')
return ch;
int gb = gbValue(ch);
if (gb < table[0])
return '0';
int i;
for (i = 0; i < 26; ++i) ...{
if (match(i, gb)) break;
}
if (i >= 26)
return '0';
else
return alphatable[i];
}

//根据一个包含汉字的字符串返回一个汉字拼音首字母的字符串
public String String2Alpha(String SourceStr)...{

String Result = "";
int StrLength = SourceStr.length();
int i;
try ...{
for (i = 0; i < StrLength; i++) ...{
Result += Char2Alpha(SourceStr.charAt(i));
}
} catch (Exception e) ...{
Result = "";
}
return Result;
}

private boolean match(int i, int gb) ...{

if (gb < table[i])
return false;
int j = i + 1;

//字母Z使用了两个标签
while (j < 26 && (table[j] == table[i])) ++j;
if (j == 26)
return gb <= table[j];
else
return gb < table[j];
}

//取出汉字的编码
private int gbValue(char ch) ...{

String str = new String();
str += ch;
try ...{
byte[] bytes = str.getBytes("GB2312");
if (bytes.length < 2)
return 0;
return (bytes[0] << 8 & 0xff00) + (bytes[1] &
0xff);
} catch (Exception e) ...{
return 0;
}
}

public static void main(String[] args) ...{

GB2Alpha obj1 = new GB2Alpha();
System.out.println(obj1.String2Alpha("昆山"));
System.out.println(obj1.String2Alpha("周市"));
return;
}
}