如何通过Sort和Pageable使用Spring数据JPA查询开箱即用的数据？ [英] How to query data out of the box using Spring data JPA by both Sort and Pageable?

问题描述

我正在我的项目中尝试 Spring data JPA 。我想通过排序和 Pageable 。当然，我知道我自己可以写这个方法，我只是想知道是否有一个开箱即用的方法。我的DAO扩展 JpaRepository ，我发现我可以调用以下方法：

I am trying Spring data JPA in my project. I want to know if there is an out-of-the-box API to query data, by both Sort and Pageable. Of course, I know I can write that method myself, I just want to know if there is an out-of-the-box one. My DAO extends JpaRepository, and I found there are the following methods I can invoke:

findAll();
findAll(Pageable pageable);
findAll(Sort sort);

但是没有像这样的方法findAll（Sort sort，Pageable pageable） ，所以我很好奇。

But there is no such method as findAll(Sort sort, Pageable pageable), so I am curious.

推荐答案

有两种方法可以达到这个目的：

There are two ways to achieve this:

final PageRequest page1 = new PageRequest(
  0, 20, Direction.ASC, "lastName", "salary"
);

final PageRequest page2 = new PageRequest(
  0, 20, new Sort(
    new Order(Direction.ASC, "lastName"), 
    new Order(Direction.DESC, "salary")
  )
);

dao.findAll(page1);

正如您所看到的，第二种形式更灵活，因为它允许为每个属性定义不同的方向（ lastName ASC，薪水DESC ）。

As you can see the second form is more flexible as it allows to define different direction for every property (lastName ASC, salary DESC).

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