string 转化成 string数组

public static String[] stringInArrays(String fields) {
    String[] field = null;
    if (fields != null && fields.length() > 0) {
        field = fields.split(",");
        String first = field[0];
        field[0] = first.substring(first.indexOf("[") + 1);
        String last = field[field.length - 1];
        field[field.length - 1] = last.substring(0, last.indexOf("]"));


    }
    return field;
}