Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 Y) Z>Bi
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 `y4+OXZ^
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据这一功能,我设计了通用的抽象Bean基类和分页类支持,代码来 aDs[\'
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自于Quake Wang的javaeye-core包的相应类,然后又做了很多修改 x9a0J1Nb-h
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分页支持类:
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java代码: %k"-rmW
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package com.javaeye.common.util; 9K)2OX;$w
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import java.util.List; w$1.h'2
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publicclass PaginationSupport { ?P}7AF
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publicfinalstaticint PAGESIZE = 30; *<J**FhcMu
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privateint pageSize = PAGESIZE; T2k5\r8
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privateList items; <[(xGrEZV
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privateint totalCount; VPK)HzPG,
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privateint[] indexes = newint[0]; Bp9
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privateint startIndex = 0; yhZ 2-*pTg
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public PaginationSupport(List items, int r" ^P>8
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totalCount){ s %/3X\_
setPageSize(PAGESIZE); /:l>yKI+~
setTotalCount(totalCount); L ej3? k
setItems(items); =ayl~"bW
setStartIndex(0); r-=#C1eY&
} ?bY'J6n.
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public PaginationSupport(List items, int A+>+XA'
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totalCount, int startIndex){ 1Z|q0-Dw0
setPageSize(PAGESIZE); h
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setTotalCount(totalCount); 90(JP-
setItems(items); `N;JM3 ck
setStartIndex(startIndex); 1InG%=jLo
} V4iN2
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public PaginationSupport(List items, int Z+JPxe#7
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totalCount, int pageSize, int startIndex){ \vsfY
setPageSize(pageSize); "p0e6Z=
setTotalCount(totalCount); \K55|3~R
setItems(items); ZE#A?5lb
setStartIndex(startIndex); '8PZmS8X9
} "cj6i{x,~w
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publicList getItems(){ l 'm!e '7_
return items; _I+QInD ;)
} V& _
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publicvoid setItems(List items){ LS
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this.items = items; m?0caLw<
} vjmNS=l
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publicint getPageSize(){ PF~w$ eeQ
return pageSize; %xPJJ$P
} 8\P!47'q
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publicvoid setPageSize(int pageSize){ ?t46TV'G
this.pageSize = pageSize; 7M7sq-n5z
} rUmaKh?v|X
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publicint getTotalCount(){ [2ez" 4e
return totalCount; Ia
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} ,=jwQG4wq
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publicvoid setTotalCount(int totalCount){ 8`Ih>
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if(totalCount > 0){ *:}9(8d
this.totalCount = totalCount; 5L!EqB>m;
int count = totalCount / n.F^9j+V
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pageSize; c'O"</
if(totalCount % pageSize > 0) LYhjI
count++; 'ioX,KD
indexes = newint[count]; UXgeL2`;
for(int i = 0; i < count; i++){ 2D;2QdO
indexes = pageSize * bS7%%8C
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} B:oE&Ahh{
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this.totalCount = 0; %1h%#/#[
} `8M{13fv
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publicint[] getIndexes(){ (}*1,N!#
return indexes; M$,4B
} AO[/-Uij
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publicvoid setIndexes(int[] indexes){ S3Dmc\f
this.indexes = indexes; h\-3Y U
} 46[k9T
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publicint getStartIndex(){ ;V v.$mI
return startIndex; GBSuTu8
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publicvoid setStartIndex(int startIndex){ tw
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if(totalCount <= 0) b=+3/-d
this.startIndex = 0; T$!Pkdh
elseif(startIndex >= totalCount)
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this.startIndex = indexes V10JExsJ
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[indexes.length - 1]; wNvq['P
elseif(startIndex < 0) Ky[s&>02
this.startIndex = 0; N||a0&&
else{ lq}m0}9<
this.startIndex = indexes sU7fVke1
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[startIndex / pageSize]; XmJ ?oPr7
} dC>[[_
} BK]5g[
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publicint getNextIndex(){ <P@ "VwUX
int nextIndex = getStartIndex() + Kt3T~k
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pageSize; 2=IZD `{!
if(nextIndex >= totalCount) s.$:.*k
return getStartIndex(); 1$_|h@
else =C#22xqQ.
return nextIndex; 5Sz&j
} WU\Bs2
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publicint getPreviousIndex(){ _J&IL!S2
int previousIndex = getStartIndex() - >c)-o}bd^
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pageSize;
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if(previousIndex < 0) AB+HyZ*//
return0; \ lW*.<
else T-F8[dd^/
return previousIndex; :d1Kq _\K
} lk4U/:
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}
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抽象业务类 n#PXMD*
java代码: Ug#EAV<m
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/** T_ j0*A$
* Created on 2005-7-12 B-p ].
*/ M~U>"kX
package com.javaeye.common.business; 0ky3rFSh1
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import java.io.Serializable; Lvb'qZ6n
import java.util.List; uWLf9D "
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import org.hibernate.Criteria; $C
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import org.hibernate.HibernateException; U!b~vrr^
import org.hibernate.Session; ,l#f6H7p
import org.hibernate.criterion.DetachedCriteria; R^6]v`j;
import org.hibernate.criterion.Projections; \SooIEl@
import PG{"GiZz=
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org.springframework.orm.hibernate3.HibernateCallback; E?h'OR@_ L
import 5Z>+NKQ
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org.springframework.orm.hibernate3.support.HibernateDaoS ,8.zbr
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upport; \Icd>>)*
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import com.javaeye.common.util.PaginationSupport; GLA4O)
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public abstract class AbstractManager extends Mk/ZEy q^
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HibernateDaoSupport { Va$JfWef
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privateboolean cacheQueries = false; 0Wb3M"#9<
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privateString queryCacheRegion; yK>s]65&
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publicvoid setCacheQueries(boolean V9;O1
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cacheQueries){ MtG~O;?8
this.cacheQueries = cacheQueries; rT'<6]`
} Ubv_a
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publicvoid setQueryCacheRegion(String T^@P.zX
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queryCacheRegion){ iza.' Mm~
this.queryCacheRegion = FTh/1"a
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queryCacheRegion; l(3\ekU!
} l8 XY
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publicvoid save(finalObject entity){ to#T+d.(v
getHibernateTemplate().save(entity); x8Nij:K#
} i}kMo@
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publicvoid persist(finalObject entity){ G3D!ifho.#
getHibernateTemplate().save(entity); qb PC5v
} <-xu*Fc
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publicvoid update(finalObject entity){ L8cPNgZ
getHibernateTemplate().update(entity); +IM6 GeH
} XBos^Q
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publicvoid delete(finalObject entity){ +~?K@n
getHibernateTemplate().delete(entity); -O6\!Wo=-
} ;f[@zo><r
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publicObject load(finalClass entity, |"Fm<