Hibernate中Criteria的完整用法

Hibernate - DetachedCriteria 的完整用法

Hibernate Projections

统计

![image.png](https://upload-images.jianshu.io/upload_images/4994935-cd026cb7a3490dc6.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

    public SoftCollect findCollect(Integer softwareId){
        Criteria criteria = createCriteria();
        ProjectionList projections = Projections.projectionList();
        projections.add(Projections.alias(
                Projections.sum("duration"), "totalDuration"));
        projections.add(Projections.alias(
                Projections.countDistinct("memberId"), "userVolume"));
        criteria.setProjection(projections);
        criteria.setResultTransformer(Transformers.aliasToBean(SoftCollect.class));
        criteria.add(Restrictions.eq("softwareId", softwareId));
        return (SoftCollect) criteria.uniqueResult();
    }

    /*public class SoftCollect implements Serializable {
    private static final long serialVersionUID = 1L;
    private int totalDuration;
    private int userVolume;

*/
}

获取一个数据

![image.png](https://upload-images.jianshu.io/upload_images/4994935-af53a3861e3b64ff.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

测试用例

package com.wanggs.dao.market;


/**
 * SoftwareDao
 */
@Repository
@SuppressWarnings("unchecked")
public class SoftweDao extends BasicDao<Softwe, Integer> {
    private static final long serialVersionUID = 1L;

    public Pagination<Softwe> findPage(Softwe search, Integer userId, int curPage, int pageSize) {
        Criteria criteria = createCriteria();
        if (search != null) {
            if (StringUtils.isNotBlank(search.getSname())) {
                criteria.add(Restrictions.like("sname", search.getSname(), MatchMode.ANYWHERE));
            }
            if (StringUtils.isNotBlank(search.getSncode())) {
                criteria.add(Restrictions.eq("sncode", search.getSncode()));
            }
            if(search.getOneCategoryId() != null){
                criteria.add(Restrictions.eq("oneCategoryId", search.getOneCategoryId()));
            }
        }
        if (userId != null) {
            criteria.createCriteria("userIds")
                    .add(Restrictions.sqlRestriction("{alias}.user_id=?", userId, IntegerType.INSTANCE));
        }
        criteria.addOrder(Order.desc("id"));
        return findPage(criteria, curPage, pageSize);
    }

    public Pagination<Softwe> removeGames(Softwe search, Integer userId, int curPage, int pageSize) {
        Criteria criteria = createCriteria();
        if (search != null) {
            if (StringUtils.isNotBlank(search.getSname())) {
                criteria.add(Restrictions.like("sname", search.getSname(), MatchMode.ANYWHERE));
            }
            if (StringUtils.isNotBlank(search.getSncode())) {
                criteria.add(Restrictions.eq("sncode", search.getSncode()));
            }
            if(search.getOneCategoryId() != null){
                criteria.add(Restrictions.ne("oneCategoryId", search.getOneCategoryId()));
            }
        }
        if (userId != null) {
            criteria.createCriteria("userIds")
                    .add(Restrictions.sqlRestriction("{alias}.user_id=?", userId, IntegerType.INSTANCE));
        }
        criteria.addOrder(Order.desc("id"));
        return findPage(criteria, curPage, pageSize);
    }

    public List<Softwe> findByCategory(Integer oneCategoryId, Integer twoCategoryId, PlatType platType) {
        Criteria criteria = createCriteria();
        if (oneCategoryId != null) {
            criteria.add(Restrictions.eq("oneCategoryId", oneCategoryId));
        }
        if (twoCategoryId != null) {
            criteria.add(Restrictions.eq("twoCategoryId", twoCategoryId));
        }
        if (platType != null && platType == PlatType.PRESENT) {
            criteria.add(Restrictions.eq("platType", platType));
        }
        criteria.add(Restrictions.ne("dtype", AppType.SYSTEM));
        ProjectionList projections = Projections.projectionList();
        projections.add(Projections.id().as("id"));
        projections.add(Projections.property("publishTime").as("publishTime"));
        criteria.setProjection(projections);
        criteria.add(Restrictions.eq("statu", PublishStatu.ISSUE));
        criteria.setResultTransformer(Transformers.aliasToBean(Softwe.class));
        return criteria.list();
    }

    public List<Softwe> findNewerSoftwe(Softwe search) {
        if (search != null && search.getPlatType() != null) {
            Criteria criteria = createCriteria();
            if (search.getPlatType() != null && search.getPlatType() == PlatType.PRESENT) {
                criteria.add(Restrictions.eq("platType", search.getPlatType()));
            }
            criteria.add(Restrictions.ne("dtype", AppType.SYSTEM));
            ProjectionList projections = Projections.projectionList();
            projections.add(Projections.id().as("id"));
            projections.add(Projections.property("publishTime").as("publishTime"));
            criteria.setProjection(projections);
            criteria.add(Restrictions.eq("statu", PublishStatu.ISSUE));
            criteria.addOrder(Order.desc("updatedAt"));
            criteria.setMaxResults(8);
            criteria.setResultTransformer(Transformers.aliasToBean(Softwe.class));
            return criteria.list();
        }
        return null;
    }

    public List<Softwe> findRankSoftwe(Softwe search) {
        if (search != null && search.getPlatType() != null) {
            Criteria criteria = createCriteria();
            if (search.getPlatType() != null && search.getPlatType() == PlatType.PRESENT) {
                criteria.add(Restrictions.eq("platType", search.getPlatType()));
            }
            criteria.add(Restrictions.ne("dtype", AppType.SYSTEM));
            ProjectionList projections = Projections.projectionList();
            projections.add(Projections.id().as("id"));
            projections.add(Projections.property("publishTime").as("publishTime"));
            criteria.setProjection(projections);
            criteria.add(Restrictions.eq("statu", PublishStatu.ISSUE));
            criteria.addOrder(Order.desc("dloadVolume"));
            criteria.setMaxResults(8);
            criteria.setResultTransformer(Transformers.aliasToBean(Softwe.class));
            return criteria.list();
        }
        return null;
    }

    public List<Softwe> findHotterSoftwe(Softwe search) {
        if (search != null && search.getPlatType() != null) {
            Criteria criteria = createCriteria();
            if (search.getPlatType() != null && search.getPlatType() == PlatType.PRESENT) {
                criteria.add(Restrictions.eq("platType", search.getPlatType()));
            }
            criteria.add(Restrictions.ne("dtype", AppType.SYSTEM));
            ProjectionList projections = Projections.projectionList();
            projections.add(Projections.id().as("id"));
            projections.add(Projections.property("publishTime").as("publishTime"));
            criteria.setProjection(projections);
            criteria.add(Restrictions.eq("statu", PublishStatu.ISSUE));
            criteria.setMaxResults(8);
            criteria.setResultTransformer(Transformers.aliasToBean(Softwe.class));
            return criteria.list();
        }
        return null;
    }

    public int findCount(String packName) {
        Criteria criteria = createCriteria();
        criteria.add(Restrictions.eq("packName", packName));
        criteria.setProjection(Projections.rowCount());
        return ((Long) criteria.uniqueResult()).intValue();
    }

    public Softwe find(String packName) {
        Criteria criteria = createCriteria();
        criteria.add(Restrictions.eq("packName", packName));
        return (Softwe) criteria.uniqueResult();
    }
    
    public Integer findId(String packName) {
        Criteria criteria = createCriteria();
        criteria.setProjection(Projections.id());
        criteria.add(Restrictions.eq("packName", packName));
        return (Integer) criteria.uniqueResult();
    }

    public List<Softwe> findByPackName(String packName) {
        Criteria criteria = createCriteria();
        criteria.add(Restrictions.eq("packName", packName));
        return criteria.list();
    }

    public Softwe findCode(String sncode) {
        Criteria criteria = createCriteria();
        criteria.add(Restrictions.eq("sncode", sncode));
        return (Softwe) criteria.uniqueResult();
    }

    public List<Softwe> findPublishSoftwe() {
        Criteria criteria = createCriteria();
        criteria.add(Restrictions.eq("statu", PublishStatu.ISSUE));
        return criteria.list();
    }

    public List<Softwe> findByCondition(Softwe search) {
        Criteria criteria = createCriteria();
        if (search != null) {
            if (StringUtils.isNotBlank(search.getSname())) {
                criteria.add(Restrictions.like("sname", search.getSname(), MatchMode.ANYWHERE));
            }
            if (StringUtils.isNotBlank(search.getSncode())) {
                criteria.add(Restrictions.eq("sncode", search.getSncode()));
            }
        }
        criteria.addOrder(Order.desc("id"));
        return criteria.list();
    }
    
    public List<Softwe> findByOneCategoryId(Integer oneCategoryId){
        Criteria criteria = createCriteria();
        if(oneCategoryId!=null){
            criteria.add(Restrictions.eq("oneCategoryId", oneCategoryId));
        }
        criteria.addOrder(Order.desc("id"));
        return criteria.list();
    }
}