对类的属性动态排序

public static void sortByField(List<User> list, String fieldName) {
        list.sort((u1, u2) -> {
            try {
                Object value1 = User.class.getDeclaredMethod("get" + capitalize(fieldName)).invoke(u1);
                Object value2 = User.class.getDeclaredMethod("get" + capitalize(fieldName)).invoke(u2);
                if (value1 instanceof Comparable && value2 instanceof Comparable) {
                    return ((Comparable) value1).compareTo(value2);
                } else {
                    throw new IllegalArgumentException("Field value is not Comparable");
                }
            } catch (Exception e) {
                throw new RuntimeException("Error during sorting", e);
            }
        });
    }

    private static String capitalize(String str) {
        if (str == null || str.isEmpty()) {
            return str;
        }
        return str.substring(0, 1).toUpperCase() + str.substring(1);
    }