Spring Date jpa 获取最新一条数据的实例代码

#Repository

import test.demo.domain.entity.TestEntity;import org.springframework.data.jpa.repository.support.JpaRepositoryImplementation;import org.springframework.stereotype.Repository;@Repositorypublic interface TestEntityRepository extends JpaRepositoryImplementation<TestEntity,Integer> {}

#Service

import org.springframework.validation.annotation.Validated;import javax.validation.constraints.NotBlank;@Validatedpublic 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;@Servicepublic 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));}

以上这篇Spring Date jpa 获取最新一条数据的实例代码就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持好吧啦网。