如何修改org.springframework.data.jpa.domain.Specification对象？

Question

我已经在@RestController中实现了Specification，以在Specificaton对象中设置值。

public ResponseEntity<ServiceResponse> searchUnexpectedLikelyToChurn(@RequestHeader HttpHeaders headers,
            @PageableDefault(page = 0, size = 10, sort = "buyer", direction = Direction.ASC) Pageable pageable, 
            @Conjunction(value = {
                    @Or({           
                        @Spec(path="buyer", params="search", spec=LikeIgnoreCase.class),
                        @Spec(path = "email", params = "search", spec = LikeIgnoreCase.class),
                        @Spec(path = "shipCity", params = "search", spec = LikeIgnoreCase.class),
                        @Spec(path = "shipState", params = "search", spec = LikeIgnoreCase.class),
                        @Spec(path = "country", params = "search", spec = LikeIgnoreCase.class)
                    })}, and = @Spec(path = "company",params = "company", spec = Equal.class)) Specification<CustomerEntity> customerSpec   

而且我使用了这个库[ https://github.com/tkaczmarzyk/specification-arg-resolver#enabling-spec-annotations-in-your-spring-app] 。

现在，我需要在此Specification对象上添加另一个条件，它是一个java.util.Date对象，它是根据代码而不是用户输入计算的。 如何添加呢？

我当前的DAO实现是：

 @Repository
public interface CustomerDao extends JpaRepository<CustomerEntity, Integer>, JpaSpecificationExecutor<CustomerEntity> { 
}

Answer 1

您可以使用org.springframework.data.jpa.domain.Specification接口，如下所示：

Specification combinedSpec - Specification.where(customerSpec)
                                          .and(calculateAdditionalSpec());

如果您使用旧版本的Spring Data JPA，请使用Specifications助手类。