Java基于MongoDB Template封装Dao层
mongoDB Template 提供了许多直接操作Mongo的方法, 在此基础上在进行一层封装, 用起来更顺手
1.Dao层的抽象类, 封装了常用的几个方法
tips: 对实体有要求, 属性不同, 一些私有方法请自行修改
/**
* @author Lynn
* @version 2022/08/15
*/
@SuppressWarnings(value = {"unchecked"})
public abstract class AbstractMongoDaoImpl<T extends BaseFeedEntity> {
@Autowired
MongoTemplate mongoTemplate;
/**
* 分页查询
*
* @param entity {@link T}
* @return {@link PageInfo}
*/
public PageInfo<T> queryPage(T entity) {
Query query = this.buildQueryCriteria(entity);
long total = mongoTemplate.count(query, entity.getClass());
if (total == 0) {
return PageInfo.of(Lists.newArrayList());
}
List<T> pageList = (List<T>) mongoTemplate.find(query.limit(entity.getPageSize()).skip((entity.getPageNum() - 1) * entity.getPageSize()), entity.getClass());
PageInfo<T> pageInfo = PageInfo.of(pageList);
pageInfo.setTotal(total);
pageInfo.setPageNum(entity.getPageNum());
pageInfo.setPageSize(entity.getPageSize());
pageInfo.setPages((int) (total / entity.getPageSize() + (total % entity.getPageSize() != 0 ? 1 : 0)));
return pageInfo;
}
/**
* 列表查询
*
* @param entity {@link T}
* @return {@link List}
*/
public List<T> queryList(T entity) {
return (List<T>) mongoTemplate.find(this.buildQueryCriteria(entity), entity.getClass());
}
/**
* 查询记录条数
*
* @param entity {@link T}
* @return 记录条数
*/
public long count(T entity) {
return mongoTemplate.count(this.buildQueryCriteria(entity), entity.getClass());
}
/**
* 详情查询
*
* @param entity {@link T}
* @return {@link T}
*/
public T findOne(T entity) {
return (T) mongoTemplate.findOne(this.buildQueryCriteria(entity), entity.getClass());
}
/**
* 根据主键查询详情
*
* @param entity {@link T}
* @return {@link T}
*/
public T findById(T entity) {
return (T) mongoTemplate.findById(entity.getId(), entity.getClass());
}
/**
* 新增
*
* @param entity {@link T}
* @return ObjectId
*/
public String insert(T entity) {
this.handleInsertInfo(entity);
T ins = mongoTemplate.insert(entity);
return ins.getId();
}
/**
* 根据主键更新
*
* @param entity {@link T}
* @return {@link Boolean}
*/
public boolean save(T entity) {
T originEntity = findById(entity);
if (null != originEntity) {
BeanUtil.copyProperties(entity, originEntity, CopyOptions.create().setIgnoreNullValue(true));
this.handleUpdateInfo(originEntity);
mongoTemplate.save(originEntity);
return true;
}
return false;
}
/**
* 根据主键删除
*
* @param entity {@link T}
* @return {@link Boolean}
*/
public boolean deleteById(T entity) {
T originEntity = findById(entity);
if (null != originEntity) {
this.handleDeleteInfo(originEntity);
mongoTemplate.save(originEntity);
return true;
}
return false;
}
/**
* 组装查询条件
*
* @param entity {@link T}
* @return {@link Query}
*/
abstract Query buildQueryCriteria(T entity);
/**
* 组装更新基础参数
*
* @param entity {@link T}
*/
private void handleUpdateInfo(T entity) {
if (Objects.isNull(entity)) {
return;
}
entity.setUpdateTime(new Date());
entity.setUpdateBy(IAuthService.getUserId());
}
/**
* 组装新增基础参数
*
* @param entity {@link T}
*/
private void handleInsertInfo(T entity) {
this.handleUpdateInfo(entity);
entity.setCreateTime(new Date());
entity.setCreatedBy(IAuthService.getUserId());
}
/**
* 组装删除基础参数
*
* @param entity {@link T}
*/
private void handleDeleteInfo(T entity) {
this.handleUpdateInfo(entity);
entity.setDelFlag(true);
}
}
- 通用Dao层接口
和抽象类里暴露的方法是对应的
/**
* @author Lynn
* @date 2022/08/15
*/
public interface CommonMongoDao<T> {
/**
* 分页查询
*
* @param entity {@link T}
* @return {@link PageInfo }
*/
PageInfo<T> queryPage(T entity);
/**
* 列表查询
*
* @param entity {@link T}
* @return {@link List}
*/
List<T> queryList(T entity);
/**
* 查询记录条数
*
* @param entity {@link T}
* @return 记录条数
*/
long count(T entity);
/**
* 详情查询
*
* @param entity {@link T}
* @return {@link T}
*/
T findOne(T entity);
/**
* 根据主键查询详情
*
* @param entity {@link T}
* @return {@link T}
*/
T findById(T entity);
/**
* 新增
*
* @param entity {@link T}
* @return ObjectId
*/
String insert(T entity);
/**
* 根据主键更新
*
* @param entity {@link T}
* @return {@link Boolean}
*/
boolean save(T entity);
/**
* 根据主键删除
*
* @param entity {@link T}
* @return {@link Boolean}
*/
boolean deleteById(T entity);
}
- 子类Dao层接口
子类Dao层接口继承通用Dao层接口, 内部只需写自己独有的方法即可
/**
* @author Lynn
* @date 2022/08/15
*/
interface ReserveOrderDao extends CommonMongoDao<ReserveOrderEntity> {
/**
* 统计免费单数量
*
* @param entity {@link ReserveOrderEntity}
* @return {@link Long}
*/
long countFreeOrders(ReserveOrderEntity entity);
}
- 子类Dao层实现
子类Dao层实现只需要实现独有的方法, 以及实现抽象类中抽象方法即可
/**
* @author Lynn
* @version 2022/08/15
*/
@Repository("reserveOrderDao")
public class ReserveOrderDaoImpl extends AbstractMongoDaoImpl<ReserveOrderEntity> implements ReserveOrderDao {
@Override
public long countFreeOrders(ReserveOrderEntity entity) {
return super.mongoTemplate.count(this.buildCountFreeOrderCriteria(entity), ReserveOrderEntity.class);
}
@Override
public Query buildQueryCriteria(ReserveOrderEntity entity) {
Criteria criteria = new Criteria();
criteria.and("delFlag").is(false);
if (StringUtils.isNotBlank(entity.getFeedId())) {
criteria.and("feedInfos.feedId").is(entity.getFeedId());
}
if (StringUtils.isNotBlank(entity.getIdentityNo())) {
criteria.and("reserveCustomer.idNo").is(entity.getIdentityNo());
}
if (StringUtils.isNotBlank(entity.getTenantId())) {
criteria.and("tenantId").is(entity.getTenantId());
}
if (StringUtils.isNotBlank(entity.getOrgId())) {
criteria.and("orgId").is(entity.getOrgId());
}
if (StringUtils.isBlank(entity.getOrgId()) && CollectionUtils.isNotEmpty(entity.getOrgIds())) {
criteria.and("orgId").in(entity.getOrgIds());
}
if (entity.getServeTimeMin() != null) {
criteria.and("serveTime").gte(entity.getServeTimeMin());
}
if (entity.getServeTimeMax() != null) {
criteria.and("serveTime").lte(entity.getServeTimeMax());
}
Query query = new Query(criteria);
query.with(Sort.by(Sort.Direction.DESC, "createTime"));
return query;
}
private Query buildCountFreeOrderCriteria(ReserveOrderEntity entity) {
Criteria criteria = new Criteria();
criteria.and("delFlag").is(false);
if (StringUtils.isNotBlank(entity.getFeedId())) {
criteria.and("feedInfos.feedId").is(entity.getFeedId());
}
if (StringUtils.isNotBlank(entity.getIdentityNo())) {
criteria.and("reserveCustomer.idNo").is(entity.getIdentityNo());
}
criteria.and("status").ne(OrderStatusEnum.CANCEL.getState());
criteria.and("freeOrder").is(true);
if (entity.getStartTime() != null && entity.getEndTime() != null) {
criteria.and("createTime").gte(entity.getStartTime()).lte(entity.getEndTime());
}
if (StringUtils.isNotBlank(entity.getTenantId())) {
criteria.and("tenantId").is(entity.getTenantId());
}
if (StringUtils.isNotBlank(entity.getOrgId())) {
criteria.and("orgId").is(entity.getOrgId());
}
return new Query(criteria);
}
}