java 非法字符过滤 , 半角/全角替换

package mjorcen.netty.test1;import java.io.UnsupportedEncodingException;public class CharByteConverter {    /**     * 全角转半角     *      * @param str     * @return     *      * @author mjorcen     * @email mjorcen@gmail.com     * @dateTime Sep 27, 2014 2:51:50 PM     * @version 1     */    @Deprecated    public static final String toSingleByte(String str) {        StringBuffer outStrBuf = new StringBuffer("");        String Tstr = "";        byte[] b = null;        for (int i = 0; i < str.length(); i++) {            Tstr = str.substring(i, i + 1);            // 全角空格转换成半角空格            if (Tstr.equals("　")) {                outStrBuf.append(" ");                continue;            }            try {                b = Tstr.getBytes("unicode");                // 得到 unicode 字节数据                if (b[2] == -1) {                    // 表示全角                    b[3] = (byte) (b[3] + 32);                    b[2] = 0;                    outStrBuf.append(new String(b, "unicode"));                } else {                    outStrBuf.append(Tstr);                }            } catch (UnsupportedEncodingException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        } // end for.        return outStrBuf.toString();    }    /**     * 半角转全角     *      * @param str     * @return     *      * @author mjorcen     * @email mjorcen@gmail.com     * @dateTime Sep 27, 2014 2:52:06 PM     * @version 1     */    @Deprecated    public static final String toDoubleByte(String str) {        StringBuffer outStrBuf = new StringBuffer("");        String Tstr = "";        byte[] b = null;        for (int i = 0; i < str.length(); i++) {            Tstr = str.substring(i, i + 1);            if (Tstr.equals(" ")) {                // 半角空格                outStrBuf.append(Tstr);                continue;            }            try {                b = Tstr.getBytes("unicode");                if (b[2] == 0) {                    // 半角                    b[3] = (byte) (b[3] - 32);                    b[2] = -1;                    outStrBuf.append(new String(b, "unicode"));                } else {                    outStrBuf.append(Tstr);                }                return outStrBuf.toString();            } catch (UnsupportedEncodingException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }        return outStrBuf.toString();    }    /**     * 半角转全角     *      * @param str     * @return     *      * @author mjorcen     * @email mjorcen@gmail.com     * @dateTime Sep 27, 2014 2:52:31 PM     * @version 1     */    public static String ToSBC(String str) {        char c[] = str.toCharArray();        for (int i = 0; i < c.length; i++) {            if (c[i] == ‘ ‘) {                c[i] = ‘\u3000‘;            } else if (c[i] < ‘\177‘) {                c[i] = (char) (c[i] + 65248);            }        }        return new String(c);    }    /**     * 全角转半角     *      * @param str     * @return     *      * @author mjorcen     * @email mjorcen@gmail.com     * @dateTime Sep 27, 2014 2:52:50 PM     * @version 1     */    public static String ToDBC(String str) {        char c[] = str.toCharArray();        for (int i = 0; i < c.length; i++) {            if (c[i] == ‘\u3000‘) {                c[i] = ‘ ‘;            } else if (c[i] > ‘\uFF00‘ && c[i] < ‘\uFF5F‘) {                c[i] = (char) (c[i] - 65248);            }        }        String returnString = new String(c);        return returnString;    }    public static void main(String[] args) {        long l = System.currentTimeMillis();        for (int i = 0; i < 100000; i++) {            String str = "８１４乡道阿斯蒂芬１２３／．１２，４１２看２家１快２看了就２；看了２叫看来＋看来家１２考虑就２３；了３接口２了２会２，．水电费苦辣时间的２　　１２５１２３１２３１２１２０９－０２１～！＠＃＄％＾＆＊（）＿";            String result = ToDBC(str);            ToSBC(result);        }        System.out.println(System.currentTimeMillis() - l);    }}