一.不带有动态条件的查询 分页的实现
实例代码：
controller：返回的是Page<>对象
@ControllerserviceImpl中的实现方法： 这里需要查询出数据的数量total，以及查询到的数据list，最后new一个实现类 new PageImpl(list,pageable,total)
@RequestMapping(value = "/egg")
public class EggController {
@ResponseBody
@RequestMapping(value = "/statisticsList")
public Page<StatisticsDto> statisticsList(@RequestParam("actId") Long actId,HttpServletRequest request,
Pageable pageable){
Long entId = CasUtils.getEntId(request);
return eggService.findStatisticsWithPage(entId,actId,pageable) ;
}
}
Page 的实现类是PageImpl Pageable 的实现类是PagerRequest
public Page<StatisticsDto> findStatisticsWithPage(Long entId, Long actId, Pageable pageable) { int total = wactPlayRecordDao.findDistinctPlayRecordTotal(entId, actId);
// List<String> openIdList = wactPlayRecordDao.findDistinctPlayRecordList(entId, actId);
List<WactPlayRecord> wactPlayRecordList = wactPlayRecordDao.findDistinctPlayRecordList(entId,actId);
List<StatisticsDto> statisticsDtoList = new ArrayList<>();
if (wactPlayRecordList.size()>0){
// statisticsDtoList = new ArrayList<>(wactPlayRecordList.size());
for (WactPlayRecord wactPlayRecord:wactPlayRecordList){
StatisticsDto statisticsDto = new StatisticsDto();
String openid = wactPlayRecord.getOpenid();
Long playRecordId = wactPlayRecord.getId();
Mpuser mpuser = mpuserDao.findMpUserByOpenId(openid);
List<CustomerCollItemInfo> customerCollItemInfoList = customerCollitemInfoDao.findCustomerCollItemInfoByOpenId(openid,entId,actId,playRecordId);
List<CustCollItemsInfoDto> custCollItemsInfoDtoList = new ArrayList<>();
if (customerCollItemInfoList.size()>0){
statisticsDto.setDetailIsShow("able");
custCollItemsInfoDtoList = new ArrayList<>(customerCollItemInfoList.size());
for (CustomerCollItemInfo customerCollItemInfo:customerCollItemInfoList){
CustCollItemsInfoDto custCollItemsInfoDto = new CustCollItemsInfoDto(customerCollItemInfo);
custCollItemsInfoDtoList.add(custCollItemsInfoDto);
}
}else{
//已中奖但是未填写&&未中奖
statisticsDto.setDetailIsShow("unable");
}
if (wactPlayRecord.getIsWin()==0){
wactPlayRecord.setIsUse(2);
}
WactPlayRecordDto wactPlayRecordDto = new WactPlayRecordDto(wactPlayRecord);
MpuserDto mpuserDto = null;
if (mpuser!= null){
mpuserDto = new MpuserDto(mpuser);
}
statisticsDto.setWactPlayRecordDto(wactPlayRecordDto);
statisticsDto.setCustCollItemsInfoDtoList(custCollItemsInfoDtoList);
statisticsDto.setMpuserDto(mpuserDto);
statisticsDtoList.add(statisticsDto);
}
}
return new PageImpl(statisticsDtoList,pageable,total);
}
dao:需要继承JpaRepository
public interface WactPlayRecordDao extends JpaRepository<WactPlayRecord, Long>{
@Query("FROM WactPlayRecord w WHERE w.entId = :endId AND w.actId = :actId AND w.status = 1")
List<WactPlayRecord> findDistinctPlayRecordList(@Param("endId") Long endId,@Param("actId") Long actId);
<pre name="code" class="java">@Query("SELECT count(w.openid) FROM WactPlayRecord w WHERE w.entId = :endId AND w.actId = :actId AND w.status = 1")
int findDistinctPlayRecordTotal(@Param("endId") Long endId,@Param("actId") Long actId);
}
二。带有查询条件，两种方法
方式1（使用与查询条件在一个实体类中）.：
controller：同样是返回的Page<>对象 ，增加了表单提交的数据对象
@Controller
@RequestMapping("/news")
public class NewsController {
private NewsService newsService;
private NewsCategoryService newsCategoryService;
@RequestMapping("/list") @ResponseBody public Page<NewsDto> list(Pageable pageable, NewsCondition newsCondition) { Long id = AppUtils.getBean("loginInfo", LoginInfo.class).getEntId(); newsCondition.setEntId(id); return newsService.find(newsCondition, pageable); }}
serviceImpl
@Service
public class NewsServiceImpl implements NewsService {
@Override
@Transactional(readOnly = true)
public Page<NewsDto> find(final NewsCondition condition, Pageable pageable) {
Page<NewsEntity> page = newsDao.findAll(new Specification<NewsEntity>() {
@Override
public Predicate toPredicate(Root<NewsEntity> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
List<Predicate> list = new ArrayList<>();
list.add(cb.equal(root.get("entId").as(Long.class), condition.getEntId()));
list.add(cb.equal(root.get("deleted").as(Boolean.class), false));
Join<NewsEntity, NewsCategoryEntity> newsCategoryJoin = root.join("newsCategory");
list.add(cb.equal(newsCategoryJoin.get("enable").as(Boolean.class), true));
list.add(cb.equal(newsCategoryJoin.get("deleted").as(Boolean.class), false));
if (condition.getCategoryId() != null) {
list.add(cb.equal(newsCategoryJoin.get("id").as(Long.class), condition.getCategoryId()));
}
if (StringUtils.isNotBlank(condition.getTitle())) {
list.add(cb.like(root.get("title").as(String.class), "%" + condition.getTitle() + "%"));
}
if (condition.getFromDate() != null) {
list.add(cb.greaterThanOrEqualTo(root.get("createdDate").as(Date.class), DateUtils.getDateWithStartSecond(condition.getFromDate())));
}
if (condition.getToDate() != null) {
list.add(cb.lessThanOrEqualTo(root.get("createdDate").as(Date.class), DateUtils.getDateWithLastSecond(condition.getToDate())));
}
query.orderBy(cb.desc(root.get("top")), cb.desc(root.get("id")));
Predicate[] predicates = new Predicate[list.size()];
predicates = list.toArray(predicates);
return cb.and(predicates);
}
}, pageable);
if (page.hasContent()) {
List<NewsEntity> newsEntities = page.getContent();
List<NewsDto> newsDtos = new ArrayList<>(newsEntities.size());
List<Long> pids = new ArrayList<>();
for (NewsEntity newsEntity : newsEntities) {
if (newsEntity.getTitleImage() != null) {
pids.add(newsEntity.getTitleImage());
}
}
Map<Long, MediaFileEntity> map = null;
if (CollectionUtils.isNotEmpty(pids)) {
map = mediaFileDao.findWithMap(pids);
}
for (NewsEntity newsEntity : newsEntities) {
newsDtos.add(new NewsDto(newsEntity, map != null ? map.get(newsEntity.getTitleImage()) : null));
}
return new PageImpl(newsDtos, pageable, page.getTotalElements());
}
return null;
}
}
dao:这里一定要继承JpasSpecificationExecutor,然后使用其中的findAll（）方法,其中封装了分页方法，排序方法等
public interface NewsDao extends JpaRepository<NewsEntity, Long>, JpaSpecificationExecutor<NewsEntity> {
}
方式二（ 查询条件在不同表中的情形）:底层DAO使用sql拼装，service中仍然使用new PageImpl的方法
controller
@Controller
@RequestMapping(value = "/egg")
public class EggController {
@ResponseBody
@RequestMapping(value = "/statisticsList")
public Page<StatisticsDto> statisticsList(@RequestParam("actId") Long actId,HttpServletRequest request,
Pageable pageable,StatisticsCondition statisticsCondition){
Long entId = CasUtils.getEntId(request);
return eggService.findStatisticsWithPage(entId,actId,pageable,statisticsCondition) ;
}
serviceImpl
@Overridedao daoplus daoImpl(dao继承daoPlus,daoImpl实现daoPlus)
@Transactional
public Page<StatisticsDto> findStatisticsWithPage(Long entId, Long actId, Pageable pageable, StatisticsCondition statisticsCondition) {
Long total = wactPlayRecordDao.findTotalByCondition(entId,actId,
statisticsCondition.getParticipateBegin(),statisticsCondition.getParticipateEnd()
,statisticsCondition.getTelephone(),statisticsCondition.getIsWin(),statisticsCondition.getIsUse());
List<StatisticsDto> statisticsDtoList = new ArrayList<>();
if (total >0){
List<Object[]> objectList = wactPlayRecordDao.findStatisticsByConditionWithPage(entId,actId,
statisticsCondition.getParticipateBegin(),statisticsCondition.getParticipateEnd()
,statisticsCondition.getTelephone(),statisticsCondition.getIsWin(),statisticsCondition.getIsUse(),pageable);
for (Object[] obj:objectList){
StatisticsDto statisticsDto = new StatisticsDto();
Long id = new BigInteger(obj[0].toString()).longValue();
Integer isWin = new Short(obj[1].toString()).intValue();
Integer isUse = new Short(obj[2].toString()).intValue();
String createdDateStr = com.raipeng.micro.core.utils.DateUtils.format((Date)obj[4], com.raipeng.micro.core.utils.DateUtils.PATTERN_2);
WactAwards wactAwards = new WactAwards();
Long awardsId = new BigInteger(obj[5].toString()).longValue();
if (awardsId != 0l){
wactAwards = wactAwardsDao.findAwardByAwardId(awardsId);
}
if (isWin == 0){
isUse = 2;
}
WactPlayRecordDto wactPlayRecordDto = new WactPlayRecordDto(id,isWin,isUse,(String)obj[3],wactAwards.getName(),wactAwards.getGradeName(),createdDateStr);
String openid = (String)obj[3];
Long playRecordId = wactPlayRecordDto.getId();
List<CustomerCollItemInfo> customerCollItemInfoList = customerCollitemInfoDao.findCustomerCollItemInfoByPlayRecordId(playRecordId);
List<CustCollItemsInfoDto> custCollItemsInfoDtoList = new ArrayList<>();
if (customerCollItemInfoList.size()>0){
statisticsDto.setDetailIsShow("able");
custCollItemsInfoDtoList = new ArrayList<>(customerCollItemInfoList.size());
for (CustomerCollItemInfo customerCollItemInfo:customerCollItemInfoList){
// customerCollItemsIds +=customerCollItemInfo.getCustomerCollectitemsId()+"#";
CustCollItemsInfoDto custCollItemsInfoDto = new CustCollItemsInfoDto(customerCollItemInfo);
custCollItemsInfoDtoList.add(custCollItemsInfoDto);
}
}else{
//已中奖但是未填写&&未中奖
statisticsDto.setDetailIsShow("unable");
}
Object[] object = wactPlayRecordDao.findUserInfoByOpenId(openid);
MpuserDto mpuserDto = new MpuserDto();
if (object[1] != null){
mpuserDto.setHeadImg((String)object[1]);
}else if (object[3] != null){
mpuserDto.setHeadImg((String)object[3]);
}else {
mpuserDto.setHeadImg("");
}
if (object[2] != null){
mpuserDto.setNickName((String)object[2]);
}else if (object[4] != null){
mpuserDto.setNickName((String)object[4]);
}else {
mpuserDto.setNickName("");
}
if (wactPlayRecordDto.getIsWin()=="已中奖" && custCollItemsInfoDtoList.size()==0){
wactPlayRecordDto.setIsUse("");
}
if (mpuserDto.getHeadImg()==""){
statisticsDto.setHeadImg("unable");
}else{
statisticsDto.setHeadImg("able");
}
if (wactPlayRecordDto.getIsUse()=="已领取"){
statisticsDto.setHaveReceived("able");
}else {
statisticsDto.setHaveReceived("unable");
}
statisticsDto.setWactPlayRecordDto(wactPlayRecordDto);
statisticsDto.setCustCollItemsInfoDtoList(custCollItemsInfoDtoList);
statisticsDto.setMpuserDto(mpuserDto);
if (wactPlayRecordDto.getIsUse()=="未领取"){
statisticsDto.setSetReceive("able");
}else {
statisticsDto.setSetReceive("unable");
}
String customerCollItemsIds = "";
List<CustomerCollectItems> customerCollectItemsList = customerCollectItemsDao.findListByActivityId(actId);
if (customerCollectItemsList != null && customerCollectItemsList.size()>0){
for (CustomerCollectItems customerCollectItems:customerCollectItemsList){
customerCollItemsIds += customerCollectItems.getCollectItemsId()+"#";
}
}
statisticsDto.setCustomerCollectItemsIds(customerCollItemsIds);
statisticsDtoList.add(statisticsDto);
}
}
return new PageImpl<StatisticsDto>(statisticsDtoList,pageable,total);
}
daoplus
public interface WactPlayRecordPlusDao {
Long findTotalByCondition(Long entId,Long actId,Date participateBegin,Date participateEnd,String telephone,Integer isWin,Integer isUse);
List<Object[]> findStatisticsByConditionWithPage(Long entId, Long actId, Date participateBegin, Date participateEnd, String telephone, Integer isWin, Integer isUse,Pageable pageable);
}
daoImpl
public class WactPlayRecordDaoImpl implements WactPlayRecordPlusDao {@PersistenceContext private EntityManager entityManager; public void setEntityManager(EntityManager entityManager) { this.entityManager = entityManager; } @Override public Long findTotalByCondition(Long entId, Long actId, Date participateBegin, Date participateEnd, String telephone, Integer isWin, Integer isUse) { StringBuffer sql = null; if (telephone != null && !"".equals(telephone)){// hql = new StringBuffer("SELECT w.id,w.isWin,w.isUse,W.openid " +//表没有关联所以不能使用面向对象语句的left outer join inner join 等// "FROM WactPlayRecord w inner join CustomerCollItemInfo c " +// "ON w.id = c.playRecordId" +// "WHERE w.entId = :entId AND w.actId = :actId AND w.status = 1 " +// "AND c.entId = :entId AND c.actId = :actId AND c.status = 1 And c.val = :telephone "); sql =new StringBuffer("SELECT count(p.id)" + "FROM rp_act_play_record p inner join rp_act_customer_collitem_info c " + "ON p.id = c.play_record_id " + "WHERE p.ent_id = :entId AND p.act_id = :actId AND p.status = 1 " + "AND c.ent_id = :entId AND c.act_id = :actId AND c.status = 1 And c.val = :telephone "); }else {// hql = new StringBuffer("SELECT w.id,w.isWin,w.isUse,w.openid " +// "FROM WactPlayRecord w " +// "WHERE w.entId = :entId AND w.actId = :actId AND w.status = 1 " ); sql = new StringBuffer("SELECT count(p.id) " + "FROM rp_act_play_record p " + "WHERE p.ent_id = :entId AND p.act_id = :actId AND p.status = 1 " ); } if (participateBegin != null){ sql.append("AND p.created_date >= :participateBegin "); } if (participateEnd != null){ sql.append("AND p.created_date <= :participateEnd "); } if (isWin == 0){ sql.append("AND p.is_win = 0 "); }else if (isWin ==1){ sql.append("AND p.is_win = 1 "); } if (isUse == 0){ sql.append("AND p.is_use = 0 "); }else if (isUse == 1){ sql.append("AND p.is_use = 1 "); } sql.append("order by p.created_date ASC"); Query query = entityManager.createNativeQuery(sql.toString()); query.setParameter("entId", entId).setParameter("actId", actId); if (participateBegin != null){ query.setParameter("participateBegin", participateBegin); } if (participateEnd != null){ query.setParameter("participateEnd", participateEnd); } if (telephone != null && !"".equals(telephone)){ query.setParameter("telephone",telephone); } Long total = new BigInteger(query.getSingleResult().toString()).longValue(); return total; } @Override public List<Object[]> findStatisticsByConditionWithPage(Long entId, Long actId, Date participateBegin, Date participateEnd, String telephone, Integer isWin, Integer isUse,Pageable pageable) { StringBuffer sql = null; if (telephone != null && !"".equals(telephone)){// hql = new StringBuffer("SELECT w.id,w.isWin,w.isUse,W.openid " +// "FROM WactPlayRecord w inner join CustomerCollItemInfo c " +// "ON w.id = c.playRecordId" +// "WHERE w.entId = :entId AND w.actId = :actId AND w.status = 1 " +// "AND c.entId = :entId AND c.actId = :actId AND c.status = 1 And c.val = :telephone "); sql =new StringBuffer("SELECT p.id,p.is_win,p.is_use,p.openid,p.created_date,p.awards_id " + "FROM rp_act_play_record p inner join rp_act_customer_collitem_info c " + "ON p.id = c.play_record_id " + "WHERE p.ent_id = :entId AND p.act_id = :actId AND p.status = 1 " + "AND c.ent_id = :entId AND c.act_id = :actId AND c.status = 1 And c.val = :telephone "); }else {// hql = new StringBuffer("SELECT w.id,w.isWin,w.isUse,w.openid " +// "FROM WactPlayRecord w " +// "WHERE w.entId = :entId AND w.actId = :actId AND w.status = 1 " ); sql = new StringBuffer("SELECT p.id,p.is_win,p.is_use,p.openid,p.created_date,p.awards_id " + "FROM rp_act_play_record p " + "WHERE p.ent_id = :entId AND p.act_id = :actId AND p.status = 1 " ); } if (participateBegin != null){ sql.append("AND p.created_date >= :participateBegin "); } if (participateEnd != null){ sql.append("AND p.created_date <= :participateEnd "); } if (isWin == 0){ sql.append("AND p.is_win = 0 "); }else if (isWin ==1){ sql.append("AND p.is_win = 1 "); } if (isUse == 0){ sql.append("AND p.is_use = 0 "); }else if (isUse == 1){ sql.append("AND p.is_use = 1 "); } sql.append("order by p.created_date DESC"); Query query = entityManager.createNativeQuery(sql.toString()); query.setParameter("entId", entId).setParameter("actId", actId); if (participateBegin != null){ query.setParameter("participateBegin", participateBegin); } if (participateEnd != null){ query.setParameter("participateEnd", participateEnd); } if (telephone != null && !"".equals(telephone)){ query.setParameter("telephone",telephone); } query.setFirstResult(pageable.getPageNumber() * pageable.getPageSize()); query.setMaxResults(pageable.getPageSize()); List<Object[]> objectList = query.getResultList(); return objectList; }