法一(本地sql查询,注意表名啥的都用数据库中的名称,适用于特定数据库的查询)
public interface UserRepository extends JpaRepository<User, Long> { @Query(value = "SELECT * FROM USERS WHERE LASTNAME = ?1", countQuery = "SELECT count(*) FROM USERS WHERE LASTNAME = ?1", nativeQuery = true) Page<User> findByLastname(String lastname, Pageable pageable);
@Query(value = "SELECT u FROM Users u WHERE u.username like %:username%") List<User> findByName(@Param("username") String username);}
法二(jpa已经实现的分页接口,适用于简单的分页查询)
public interface PagingAndSortingRepository<T, ID extends Serializable> extends CrudRepository<T, ID> { Iterable<T> findAll(Sort sort); Page<T> findAll(Pageable pageable); } Accessing the second page of User by a page size of 20 you could simply do something like this: PagingAndSortingRepository<User, Long> repository = // … get access to a bean Page<User> users = repository.findAll(new PageRequest(1, 20));
User findFirstByOrderByLastnameAsc(); User findTopByOrderByAgeDesc(); Page<User> queryFirst10ByLastname(String lastname, Pageable pageable); Slice<User> findTop3ByLastname(String lastname, Pageable pageable); List<User> findFirst10ByLastname(String lastname, Sort sort); List<User> findTop10ByLastname(String lastname, Pageable pageable);
//service Sort sort = new Sort(Sort.Direction.DESC,"createTime"); //创建时间降序排序 Pageable pageable = new PageRequest(pageNumber,pageSize,sort); this.depositRecordRepository.findAllByUserIdIn(userIds,pageable); //repository Page<DepositRecord> findAllByUserIdIn(List<Long> userIds,Pageable pageable);
法三(Query注解,hql语局,适用于查询指定条件的数据)
@Query(value = "select b.roomUid from RoomBoard b where b.userId=:userId and b.lastBoard=true order by b.createTime desc") Page<String> findRoomUidsByUserIdPageable(@Param("userId") long userId, Pageable pageable);
Pageable pageable = new PageRequest(pageNumber,pageSize); Page<String> page = this.roomBoardRepository.findRoomUidsByUserIdPageable(userId,pageable); List<String> roomUids = page.getContent();
可以自定义整个实体(Page<User>),也可以查询某几个字段(Page<Object[]>),和原生sql几乎一样灵活。
法四(扩充findAll,适用于动态sql查询)
public interface UserRepository extends JpaRepository<User, Long> { Page<User> findAll(Specification<User> spec, Pageable pageable); }
@Service public class UserService { @Autowired private UserRepository userRepository; public Page<User> getUsersPage(PageParam pageParam, String nickName) { //规格定义 Specification<User> specification = new Specification<User>() { /** * 构造断言 * @param root 实体对象引用 * @param query 规则查询对象 * @param cb 规则构建对象 * @return 断言 */ @Override public Predicate toPredicate(Root<User> root, CriteriaQuery<?> query, CriteriaBuilder cb) { List<Predicate> predicates = new ArrayList<>(); //所有的断言 if(StringUtils.isNotBlank(nickName)){ //添加断言 Predicate likeNickName = cb.like(root.get("nickName").as(String.class),nickName+"%"); predicates.add(likeNickName); } return cb.and(predicates.toArray(new Predicate[0])); } }; //分页信息 Pageable pageable = new PageRequest(pageParam.getPage()-1,pageParam.getLimit()); //页码:前端从1开始,jpa从0开始,做个转换 //查询 return this.userRepository.findAll(specification,pageable); } }
法五(使用entityManager,适用于动态sql查询)
@Service @Transactional
public class IncomeService{ /** * 实体管理对象 */ @PersistenceContext EntityManager entityManager; public Page<IncomeDaily> findIncomeDailysByPage(PageParam pageParam, String cpId, String appId, Date start, Date end, String sp) { StringBuilder countSelectSql = new StringBuilder(); countSelectSql.append("select count(*) from IncomeDaily po where 1=1 "); StringBuilder selectSql = new StringBuilder(); selectSql.append("from IncomeDaily po where 1=1 "); Map<String,Object> params = new HashMap<>(); StringBuilder whereSql = new StringBuilder(); if(StringUtils.isNotBlank(cpId)){ whereSql.append(" and cpId=:cpId "); params.put("cpId",cpId); } if(StringUtils.isNotBlank(appId)){ whereSql.append(" and appId=:appId "); params.put("appId",appId); } if(StringUtils.isNotBlank(sp)){ whereSql.append(" and sp=:sp "); params.put("sp",sp); } if (start == null) { start = DateUtil.getStartOfDate(new Date()); } whereSql.append(" and po.bizDate >= :startTime"); params.put("startTime", start); if (end != null) { whereSql.append(" and po.bizDate <= :endTime"); params.put("endTime", end); } String countSql = new StringBuilder().append(countSelectSql).append(whereSql).toString(); Query countQuery = this.entityManager.createQuery(countSql,Long.class); this.setParameters(countQuery,params); Long count = (Long) countQuery.getSingleResult(); String querySql = new StringBuilder().append(selectSql).append(whereSql).toString(); Query query = this.entityManager.createQuery(querySql,IncomeDaily.class); this.setParameters(query,params); if(pageParam != null){ //分页 query.setFirstResult(pageParam.getStart()); query.setMaxResults(pageParam.getLength()); } List<IncomeDaily> incomeDailyList = query.getResultList(); if(pageParam != null) { //分页 Pageable pageable = new PageRequest(pageParam.getPage(), pageParam.getLength()); Page<IncomeDaily> incomeDailyPage = new PageImpl<IncomeDaily>(incomeDailyList, pageable, count); return incomeDailyPage; }else{ //不分页 return new PageImpl<IncomeDaily>(incomeDailyList); } } /** * 给hql参数设置值 * @param query 查询 * @param params 参数 */ private void setParameters(Query query,Map<String,Object> params){ for(Map.Entry<String,Object> entry:params.entrySet()){ query.setParameter(entry.getKey(),entry.getValue()); } }
}
package com.ukefu.webim.service.es; import static org.elasticsearch.index.query.QueryBuilders.termQuery; import java.text.SimpleDateFormat; import java.util.*; import org.apache.commons.lang.StringUtils; import org.elasticsearch.index.query.BoolQueryBuilder; import org.elasticsearch.index.query.QueryBuilders; import org.elasticsearch.index.query.QueryStringQueryBuilder; import org.elasticsearch.index.query.QueryStringQueryBuilder.Operator; import org.elasticsearch.index.query.RangeQueryBuilder; import org.elasticsearch.search.sort.FieldSortBuilder; import org.elasticsearch.search.sort.SortOrder; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.domain.Page; import org.springframework.data.domain.PageImpl; import org.springframework.data.domain.Pageable; import org.springframework.stereotype.Repository; import com.ukefu.webim.web.model.EntCustomer; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.persistence.Query; @Repository public class EntCustomerRepositoryImpl implements EntCustomerEsCommonRepository { @PersistenceContext EntityManager entityManager; /** * @param nameOrPhone 判断 根据手机或者姓名进行模糊查询 名称 手机 不限 * @param entCustomer 根据 etype 类型 精确查询 * phone 手机对应使用手机模糊查询 * name 名字对应使用名字模糊查询 * province 省份 精确查询 * city 城市 精确查询 * maturity 成熟度 精确查询 * creater 创建者 必备查询条件 * shares 是否共享 必备查询条件 * orgi 组织 必备查询条件 * ekind 客户类型 * @return */ @Override public Page<EntCustomer> findByCreaterAndSharesAndOrgi(String nameOrPhone, EntCustomer entCustomer, Pageable page) { StringBuilder countSelectSql = new StringBuilder(); countSelectSql.append("select count(*) from EntCustomer po where 1=1 "); StringBuilder selectSql = new StringBuilder(); selectSql.append("from EntCustomer po where 1=1 "); Map<String, Object> params = new HashMap<>(); StringBuilder whereSql = new StringBuilder(); if (!StringUtils.isBlank(entCustomer.getEkind())) { whereSql.append(" and ekind=:ekind"); params.put("ekind", entCustomer.getEkind()); } if (!StringUtils.isBlank(entCustomer.getOrgi())) { whereSql.append(" and orgi=:orgi"); params.put("orgi", entCustomer.getOrgi()); } if (!StringUtils.isBlank(entCustomer.getEtype())) { whereSql.append(" and etype=:etype"); params.put("etype", entCustomer.getEtype()); } if (!StringUtils.isBlank(entCustomer.getProvince())) { whereSql.append(" and province=:province"); params.put("province", entCustomer.getProvince()); } if (!StringUtils.isBlank(entCustomer.getCity())) { whereSql.append(" and city=:city"); params.put("city", entCustomer.getCity()); } if (!StringUtils.isBlank(entCustomer.getMaturity())) { whereSql.append(" and maturity=:maturity"); params.put("maturity", entCustomer.getMaturity()); } whereSql.append(" and (creater=:creater or shares=:shares)"); params.put("creater", entCustomer.getCreater()); params.put("shares", "all"); if (StringUtils.isNotBlank(entCustomer.getName())) { // 根据手机或名字模糊查询 if (Objects.equals(nameOrPhone, "不限")) { whereSql.append(" and (name like :name or phone like :phone)"); params.put("name", "%"+entCustomer.getName()+"%"); params.put("phone", "%"+entCustomer.getName()+"%"); //根据手机模糊查询 } else if (Objects.equals(nameOrPhone, "手机")) { whereSql.append(" and phone like :phone"); params.put("phone", "%"+entCustomer.getName()+"%"); //根据名字模糊查询 } else { whereSql.append(" and name like :name "); params.put("name", "%"+entCustomer.getName()+"%"); } } String countSql = new StringBuilder().append(countSelectSql).append(whereSql).toString(); Query countQuery = this.entityManager.createQuery(countSql, Long.class); this.setParameters(countQuery, params); Long count = (Long) countQuery.getSingleResult(); String querySql = new StringBuilder().append(selectSql).append(whereSql).toString(); Query query = this.entityManager.createQuery(querySql, EntCustomer.class); this.setParameters(query, params); if (page != null) { //分页 query.setFirstResult(page.getPageSize() * page.getPageNumber()); query.setMaxResults(page.getPageSize()); } List<EntCustomer> entCustomerList = query.getResultList(); Page<EntCustomer> entCustomerPage = new PageImpl<EntCustomer>(entCustomerList, page, count); return entCustomerPage; } /** * 给hql参数设置值 * * @param query 查询 * @param params 参数 */ private void setParameters(Query query, Map<String, Object> params) { for (Map.Entry<String, Object> entry : params.entrySet()) { query.setParameter(entry.getKey(), entry.getValue()); } } }