全角和半角字符转换代码（Java）

public static class SD
    {
        private char sbc;
        private char dbc;

        public SD(char sbc, char dbc)
        {
            this.sbc = sbc;
            this.dbc = dbc;
        }

        public char getSBC()
        {
            return this.sbc;
        }

        public char getDBC()
        {
            return this.dbc;
        }
    }

    public static final SD[] sdArray = {
        new SD('０', '0'),
        new SD('１', '1'),
        new SD('２', '2'),
        new SD('３', '3'),
        new SD('４', '4'),
        new SD('５', '5'),
        new SD('６', '6'),
        new SD('７', '7'),
        new SD('８', '8'),
        new SD('９', '9'),
        new SD('ａ', 'a'),
        new SD('ｂ', 'b'),
        new SD('ｃ', 'c'),
        new SD('ｄ', 'd'),
        new SD('ｅ', 'e'),
        new SD('ｆ', 'f'),
        new SD('ｇ', 'g'),
        new SD('ｈ', 'h'),
        new SD('ｉ', 'i'),
        new SD('ｊ', 'j'),
        new SD('ｋ', 'k'),
        new SD('ｌ', 'l'),
        new SD('ｍ', 'm'),
        new SD('ｎ', 'n'),
        new SD('ｏ', 'o'),
        new SD('ｐ', 'p'),
        new SD('ｑ', 'q'),
        new SD('ｒ', 'r'),
        new SD('ｓ', 's'),
        new SD('ｔ', 't'),
        new SD('ｕ', 'u'),
        new SD('ｖ', 'v'),
        new SD('ｗ', 'w'),
        new SD('ｘ', 'x'),
        new SD('ｙ', 'y'),
        new SD('ｚ', 'z'),
        new SD('Ａ', 'A'),
        new SD('Ｂ', 'B'),
        new SD('Ｃ', 'C'),
        new SD('Ｄ', 'D'),
        new SD('Ｅ', 'E'),
        new SD('Ｆ', 'F'),
        new SD('Ｇ', 'G'),
        new SD('Ｈ', 'H'),
        new SD('Ｉ', 'I'),
        new SD('Ｊ', 'J'),
        new SD('Ｋ', 'K'),
        new SD('Ｌ', 'L'),
        new SD('Ｍ', 'M'),
        new SD('Ｎ', 'N'),
        new SD('Ｏ', 'O'),
        new SD('Ｐ', 'P'),
        new SD('Ｑ', 'Q'),
        new SD('Ｒ', 'R'),
        new SD('Ｓ', 'S'),
        new SD('Ｔ', 'T'),
        new SD('Ｕ', 'U'),
        new SD('Ｖ', 'V'),
        new SD('Ｗ', 'W'),
        new SD('Ｘ', 'X'),
        new SD('Ｙ', 'Y'),
        new SD('Ｚ', 'Z'),
        new SD('．', '.'),
        new SD('　', ' '),
        new SD('（', '('),
        new SD('）', ')'),
        new SD('｛', '{'),
        new SD('｝', '}'),
        new SD('［', '['),
        new SD('］', ']'),
        new SD('＜', '<'),
        new SD('＞', '>'),
        new SD('「', '“'),
        new SD('」', '”'),
        new SD('｀', '`'),
        new SD('～', '~'),
        new SD('！', '!'),
        new SD('＠', '@'),
        new SD('＃', '#'),
        new SD('％', '%'),
        new SD('＾', '^'),
        new SD('※', '&'),
        new SD('＊', '*'),
        new SD('－', '-'),
        new SD('＿', '_'),
        new SD('＋', '+'),
        new SD('＝', '='),
        new SD('｜', '|'),
        new SD('＼', '\\'),
        new SD('■', '-'),
        new SD('’', '\''),
        new SD('‘', '\''),
        new SD('“', '\"'),
        new SD('”', '\"'),
        new SD('／', '/'),
        new SD('；', ';'),
        new SD('：', ':'),
        new SD('，', ','),
        new SD('。', '.'),
        new SD('？', '?'),
    };

//全角转半角


    public static String sbc2dbc(String src)
    {
        if (src == null)
        {
            return src;
        }

        int i;
        char ch;
        int len = src.length();
        char[] chs = src.toCharArray();
        int sdCount = sdArray.length;
        StringBuffer sbResult = new StringBuffer(len);

        try
        {
            for (int k=0; k<len; k++)
            {
                ch = chs[k];

                for (i=0; i<sdCount; i++)
                {
                    if (sdArray[i].sbc == ch) //全角字符

                    {
                    sbResult.append(sdArray[i].dbc);
                    break;
                }
                }

                if (i == sdCount) //没有查到对应的全角字符

                {
                    sbResult.append(ch);
                }
            }
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
        }

        return sbResult.toString();
    }

//半角转全角


    public static String dbc2sbc(String src)
    {
        if (src == null)
        {
            return src;
        }

        int i;
        char ch;
        int len = src.length();
        char[] chs = src.toCharArray();
        int sdCount = sdArray.length;
        StringBuffer sbResult = new StringBuffer(len);

        try
        {
            for (int k=0; k<len; k++)
            {
                ch = chs[k];

                for (i=0; i<sdCount; i++)
                {
                    if (sdArray[i].dbc == ch) //半角字符

                    {
                    sbResult.append(sdArray[i].sbc);
                    break;
                }
                }

                if (i == sdCount) //没有查到对应的半角字符

                {
                    sbResult.append(ch);
                }
            }
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
        }

        return sbResult.toString();
    }