1 | public interface BatchDao<T> { |
2 | public void batchInsert(List<T> list); |
3 | |
4 | public void batchUpdate(List<T> list); |
5 | } |
1 | public interface ReceiptDao extends PagingAndSortingRepository<Receipt, Long>, BatchDao<Receipt> { |
2 | |
3 | // start回单录入 |
4 | Page<Receipt> findByUserId(Long userId, Pageable pageable); |
5 |
6 | } |
01 | import java.util.List; |
02 |
03 | import javax.persistence.EntityManager; |
04 | import javax.persistence.PersistenceContext; |
05 |
06 | import org.hibernate.Query; |
07 | import org.hibernate.ScrollableResults; |
08 | import org.hibernate.Session; |
09 | import org.springframework.transaction.annotation.Transactional; |
10 |
11 | import com.ygsoft.cxpt.dao.BatchDao; |
12 | import com.ygsoft.util.dwz.Page; |
13 |
14 | /** |
15 | * |
16 | * @author <a href="mailto:[email protected]">ketayao</a> Version 1.1.0 |
17 | * @since 2012-8-27 上午10:55:41 |
18 | */ |
19 |
20 | public abstract class AbstractDao implements BatchDao{ |
21 |
22 | @PersistenceContext |
23 | protected EntityManager em; |
24 |
25 | @Transactional |
26 | public void batchInsert(List list) { |
27 | for (int i = 0; i < list.size(); i++) { |
28 | em.persist(list.get(i)); |
29 | if (i % 30 == 0) { |
30 | em.flush(); |
31 | em.clear(); |
32 | } |
33 | } |
34 | } |
35 | |
36 | @Transactional |
37 | public void batchUpdate(List list) { |
38 | for (int i = 0; i < list.size(); i++) { |
39 | em.merge(list.get(i)); |
40 | if (i % 30 == 0) { |
41 | em.flush(); |
42 | em.clear(); |
43 | } |
44 | } |
45 | } |
46 |
47 | /** |
48 | * Hibernate使用游标分页的一个通用查询分页方法 |
49 | * 描述 |
50 | * @param queryString |
51 | * @param parameters |
52 | * @param page |
53 | * @return |
54 | */ |
55 | @SuppressWarnings("unchecked") |
56 | public List findPageByQuery(final String queryString, |
57 | final Object[] parameters, final Page page) { |
58 |
59 | Session session = (Session) em.getDelegate(); |
60 |
61 | Query query = session.createQuery(queryString); |
62 |
63 | // 判断有无条件参数的情况 |
64 | if (parameters != null) { |
65 | for (int i = 0; i < parameters.length; i++) { |
66 | query.setParameter(i, parameters[i]); |
67 | } |
68 | } |
69 |
70 | // 使用游标来得到总条数 |
71 | ScrollableResults sr = query.scroll(); |
72 | sr.last(); |
73 | int totalCount = sr.getRowNumber(); |
74 |
75 | // 索引加1 |
76 | int totalRec = totalCount + 1; |
77 | page.setTotalCount(totalRec); |
78 |
79 | int startIndex = (page.getPageNum() - 1) * page.getNumPerPage(); |
80 |
81 | query.setFirstResult(startIndex); |
82 | query.setMaxResults(page.getNumPerPage()); |
83 |
84 | List reList = query.list(); |
85 |
86 | return reList; |
87 | } |
88 | } |
01 | import com.ygsoft.cxpt.entity.FmisItem; |
02 |
03 | /** |
04 | * |
05 | * @author <a href="mailto:[email protected]">ketayao</a> |
06 | * Version 1.1.0 |
07 | * @since 2012-9-7 下午5:28:58 |
08 | */ |
09 | @Repository |
10 | public class FmisItemDaoImpl extends AbstractDao<FmisItem> { |
11 |
12 | } |