获取类的字段

public static String[] findAllInClassFieldsName(Class l) {
    String[]    fieldStr = null;
    if (l != null) {
        Field[] fields = l.getDeclaredFields();
        fieldStr = new String[fields.length];
        for (int i = 0; i < fields.length; i++) {
            fieldStr[i] = fields[i].getName();
        }
    }
    return fieldStr;

}