获取类的字段值

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();
        }
    }
    String fields = Arrays.toString(fieldStr);
    fields = fields.substring(1, fields.length() - 1);
    return fields;

}