本篇文章为大家展示了Spring Date jpa 实现获取最新一条数据的方法,内容简明扼要并且容易理解,绝对能使你眼前一亮,通过这篇文章的详细介绍希望你能有所收获。
#Repository
import test.demo.domain.entity.TestEntity; import org.springframework.data.jpa.repository.support.JpaRepositoryImplementation; import org.springframework.stereotype.Repository; @Repository public interface TestEntityRepository extends JpaRepositoryImplementation<TestEntity,Integer> { }
#Service
import org.springframework.validation.annotation.Validated; import javax.validation.constraints.NotBlank; @Validated public interface TestService { /** * 获取账号最新的一个数据(指单个字段,例如最新时间,最新年龄等) * @param username * @return */ String findLastage(@NotBlank String username); }
#ServiceImpl
import test.demo.domain.entity.TestEntity; import test.demo.repository.TestEntityRepository; import test.demo.service.TestService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.domain.PageRequest; import org.springframework.data.domain.Sort; import org.springframework.stereotype.Service; import java.time.LocalDateTime; import java.util.List; @Service public class TestServiceImpl implements TestService { @Autowired private TestEntityRepository testEntityRepository; @Override public String findLastAge(String username) { Sort createTime = new Sort(Sort.Direction.DESC, "createTime"); PageRequest of = PageRequest.of(0, 1, createTime); List<TestEntity> testEntities= testEntityRepository.findAll(((root, criteriaQuery, criteriaBuilder) -> criteriaBuilder.and( criteriaBuilder.equal(root.get("age"), age), criteriaBuilder.lessThan(root.get("expiredTime"), LocalDateTime.now()) ))); if (testEntities.isEmpty()){ return null; } String age = TestEntities.get(0).getCode(); return age; } }
Entity这里就不写了,很普通,只说重点!
看下官方文档的解释:
补充知识:【spring data jpa】根据一个时间字段 查询 时间段的处理方法
处理方法 包含结束时间00.00.00
Date createDate = boxCodeLog.getCreateDate(); if (createDate != null){ LocalDate localDate=createDate.toInstant().atZone(ZoneId.systemDefault()).toLocalDate(); localDate = localDate.plusDays(1); Date endDate = java.sql.Date.valueOf(localDate); predicates.add(cb.between(root.get("createDate"),createDate,endDate)); }
包含结束时间 23.59.59
Date createDate = receipt.getCreateDate(); if (createDate != null){ LocalDate localDate=createDate.toInstant().atZone(ZoneId.systemDefault()).toLocalDate(); localDate = localDate.plusDays(1); Date endDate = new Date(java.sql.Date.valueOf(localDate).getTime()-1L); predicates.add(cb.between(root.get("createDate"),createDate,endDate)); }
上述内容就是Spring Date jpa 实现获取最新一条数据的方法,你们学到知识或技能了吗?如果还想学到更多技能或者丰富自己的知识储备,欢迎关注亿速云行业资讯频道。
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。