我在条件查询/jpql中的自定义订单依据

// 自定义函数
public class CustomFunctions {
    public static int calculateOrderValue(Order order) {
        // 自定义逻辑计算订单价值
        // ...
        return orderValue;
    }
}

// 在查询中使用自定义函数
String jpql = "SELECT o FROM Order o ORDER BY CustomFunctions.calculateOrderValue(o) DESC";
Query query = entityManager.createQuery(jpql);
List<Order> orders = query.getResultList();

String jpql = "SELECT o FROM Order o ORDER BY CASE o.type " +
        "WHEN 'TypeA' THEN 1 " +
        "WHEN 'TypeB' THEN 2 " +
        "ELSE 3 " +
        "END";
Query query = entityManager.createQuery(jpql);
List<Order> orders = query.getResultList();