public static String[] splitStr(String str, int splitLen) {
        int count = str.length() / splitLen + (str.length() % splitLen == 0 ? 0 : 1);
        String[] strs = new String[count];
        for (int i = 0; i < count; i++) {
            if (str.length() <= splitLen) {
                strs[i] = str;
            } else {
                strs[i] = str.substring(0, splitLen);
                str = str.substring(splitLen);
            }
        }
        return strs;
    }
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