/**     * 将字符串转成unicode     *      * @param str     *            待转字符串     * @return unicode字符串     */    public String convert(String str) {        str = (str == null ? "" : str);        String tmp;        StringBuffer sb = new StringBuffer(1000);        char c;        int i, j;        sb.setLength(0);        for (i = 0; i < str.length(); i++) {            c = str.charAt(i);            sb.append("\\u");            j = (c >>> 8); // 取出高8位            tmp = Integer.toHexString(j);            if (tmp.length() == 1)                sb.append("0");            sb.append(tmp);            j = (c & 0xFF); // 取出低8位            tmp = Integer.toHexString(j);            if (tmp.length() == 1)                sb.append("0");            sb.append(tmp);        }        return (new String(sb));    }    /**     * 将unicode 字符串     *      * @param str     *            待转字符串     * @return 普通字符串     */    public String revert(String str) {        str = (str == null ? "" : str);        if (str.indexOf("\\u") == -1)// 如果不是unicode码则原样返回            return str;        StringBuffer sb = new StringBuffer(1000);        for (int i = 0; i < str.length() - 6;) {            String strTemp = str.substring(i, i + 6);            String value = strTemp.substring(2);            int c = 0;            for (int j = 0; j < value.length(); j++) {                char tempChar = value.charAt(j);                int t = 0;                switch (tempChar) {                case 'a':                    t = 10;                    break;                case 'b':                    t = 11;                    break;                case 'c':                    t = 12;                    break;                case 'd':                    t = 13;                    break;                case 'e':                    t = 14;                    break;                case 'f':                    t = 15;                    break;                default:                    t = tempChar - 48;                    break;                }                c += t * ((int) Math.pow(16, (value.length() - j - 1)));            }            sb.append((char) c);            i = i + 6;        }        return sb.toString();    }