#Repository
1 2 3 4 5 6 7 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
1 2 3 4 5 6 7 8 9 10 11 12 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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 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
1 2 3 4 5 6 7 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
1 2 3 4 5 6 7 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
