Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 tr'95'5W.
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 y-Ol1R3:c#
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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 vu#:D1/BB
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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 C<7J5
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分页支持类: 1R:h$*-z
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java代码: kO9yei
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package com.javaeye.common.util; :g\qj? o
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import java.util.List; lA ,%'+-
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publicclass PaginationSupport { U$J]^-AS
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publicfinalstaticint PAGESIZE = 30; i &KbzOY
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privateint pageSize = PAGESIZE; K:{Q~+
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privateList items; h*KhH>\
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privateint totalCount; @Ab<I
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privateint[] indexes = newint[0]; +HcH]D;
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privateint startIndex = 0; E7D^6G&i
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public PaginationSupport(List items, int C[Fh^
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totalCount){ U?rfE(!
setPageSize(PAGESIZE); 2Hd6
setTotalCount(totalCount);
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setItems(items); h?O-13v
setStartIndex(0); :,u+[0-S
} MdKZH\z/
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public PaginationSupport(List items, int q<UqGj7#
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totalCount, int startIndex){ 0I&rZMpF&
setPageSize(PAGESIZE); "8rP?B(
setTotalCount(totalCount); [Q*kom :
setItems(items); IrVeP&KM+
setStartIndex(startIndex); !bY{T#i)k
} N" 8o0>
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public PaginationSupport(List items, int 9QYU
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totalCount, int pageSize, int startIndex){ f9rToH
setPageSize(pageSize); ywdNwNJ
setTotalCount(totalCount); Y#m0/1-
setItems(items); p
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setStartIndex(startIndex); b9v Kux
} (= \P|iv
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publicList getItems(){ mPu5%%
return items; {jl4`
} 7+fik0F
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publicvoid setItems(List items){ $@NZ*m%?JQ
this.items = items; *kIJv?%_}
} C$hsR&
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publicint getPageSize(){ YnMph0\Y^
return pageSize; bw[!f4~
} >i.+v[)#
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publicvoid setPageSize(int pageSize){ m1<B6*iG"
this.pageSize = pageSize; );6zV_^!
} (>jME
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publicint getTotalCount(){ t (1z+
return totalCount; (PNvv/A
} 8O7JuR
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publicvoid setTotalCount(int totalCount){ 99eS@}RC
if(totalCount > 0){ l^vq'<kI
this.totalCount = totalCount; wVPq1? 9
int count = totalCount / LY|h*a6Ym
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pageSize; ;aF / <r
if(totalCount % pageSize > 0) ,aN/``j=
count++; S*]IR"YL
indexes = newint[count]; ?e@Ff"Y@e
for(int i = 0; i < count; i++){ WFB2 Ub7
indexes = pageSize * *0iP*j/]
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} %1 v)rg
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}else{ N7E[wOP
this.totalCount = 0; @M,_mX
} 87HVD Di
} OUs2)H61
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publicint[] getIndexes(){ X=JSqO6V9
return indexes; OVd"'|&6_
} *=I#VN*_<.
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publicvoid setIndexes(int[] indexes){ e"bF"L
this.indexes = indexes; -1{N#c/U
} b2 ),J
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publicint getStartIndex(){ 7e40 }n
return startIndex; `)%eU~
} 1S=I(n?E
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publicvoid setStartIndex(int startIndex){ Ve=0_GR0
if(totalCount <= 0) (zhmZm
this.startIndex = 0; 2"mO"2d%
elseif(startIndex >= totalCount) /0r2v/0
this.startIndex = indexes RFZrcM
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[indexes.length - 1]; 9+/<[w7
elseif(startIndex < 0) Hp,r
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this.startIndex = 0; ="u(o(j"
else{ uwIZzz
this.startIndex = indexes Sd)D-S
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[startIndex / pageSize]; p#?1l/f"
} Mpj3<vj
} ~@-Az([H
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publicint getNextIndex(){ 7' 6m;b~F
int nextIndex = getStartIndex() + Yd,*LYd2EL
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pageSize; B@F 1!8l
if(nextIndex >= totalCount) L7KHs'c*
return getStartIndex(); ,mRN;|N
else 3*;{C|]S
return nextIndex; weu'<C
} bT>^%
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publicint getPreviousIndex(){ }^QY<Cp|
int previousIndex = getStartIndex() - W=|B3}C?
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pageSize; Lb];P"2e+
if(previousIndex < 0) C!.6:Aj
return0; :n>h[{o%
else +J^}"dG
return previousIndex; }FFW,x
} R
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} ?W#! S
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抽象业务类 H8\N~>
java代码: SKYS6b
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/** ]=pEs6%O3
* Created on 2005-7-12 ^&,{
*/ XjX<?W
package com.javaeye.common.business; E`'+1
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import java.io.Serializable;
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import java.util.List; S>'wb{jj!
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import org.hibernate.Criteria; LN7;Yr
import org.hibernate.HibernateException; R{*p\;
import org.hibernate.Session; SQliF[-
import org.hibernate.criterion.DetachedCriteria; (K2 p3M^
import org.hibernate.criterion.Projections; #!5GGe{I
import Bd7A-T)q!
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org.springframework.orm.hibernate3.HibernateCallback; mMa7Eyaf
import =XYfzR
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org.springframework.orm.hibernate3.support.HibernateDaoS i=SX_#b^
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upport; E(S}c*05O
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import com.javaeye.common.util.PaginationSupport; fCTjTlh
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public abstract class AbstractManager extends -Y+[`0$'
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HibernateDaoSupport { #7g~Um%p
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privateboolean cacheQueries = false; S4tdWA
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privateString queryCacheRegion; ^beW*O!
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publicvoid setCacheQueries(boolean tBf u{oC
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cacheQueries){ OCX?U50am
this.cacheQueries = cacheQueries; $y`|zK|G-
} #_H=pNWe
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publicvoid setQueryCacheRegion(String H{+U; 6b
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queryCacheRegion){ "cti(0F-d
this.queryCacheRegion = LxG :?=O.
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queryCacheRegion; N-5lILuJJ
} :1AOund
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publicvoid save(finalObject entity){ L6',s4
getHibernateTemplate().save(entity); 1*=[%
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} Q}1PPi,
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publicvoid persist(finalObject entity){ i/WYjo
getHibernateTemplate().save(entity); D'</eJ
} 3<Cd>o.
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publicvoid update(finalObject entity){ T%ha2X=
getHibernateTemplate().update(entity); O[-wm;_(=*
} ZL@7Mr!e
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publicvoid delete(finalObject entity){ R(hqBa/V
getHibernateTemplate().delete(entity); M>'-P
} lv{Qn~\y&
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publicObject load(finalClass entity, 8_ju.h[
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finalSerializable id){ Kp!P/Q{
return getHibernateTemplate().load *WOA",gZ
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(entity, id); o{:D
} ,g/ UPK8K=
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publicObject get(finalClass entity, |>p\*Dl}H
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finalSerializable id){ r{Xh]U&>k
return getHibernateTemplate().get <6Br]a60RR
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(entity, id); t6j(9[gGq
} .*v8*8OJ&
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publicList findAll(finalClass entity){ bu\,2t}B
return getHibernateTemplate().find("from F[Peil+|`
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" + entity.getName()); U4Qc$&j>
} l=kgRh
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publicList findByNamedQuery(finalString `
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namedQuery){ hcM 0?=
return getHibernateTemplate AD~\/V&+
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().findByNamedQuery(namedQuery); "i9$w\lm
} '0w'||#1
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publicList findByNamedQuery(finalString query, *bwLih!}H
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finalObject parameter){ &W }ooGg
return getHibernateTemplate i1u &-#k
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().findByNamedQuery(query, parameter); H.Pts>3r(
} |1;0q<Ka
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publicList findByNamedQuery(finalString query, `/0X].s#o
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finalObject[] parameters){ W0l|E&fj[
return getHibernateTemplate d0IHl!X
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().findByNamedQuery(query, parameters); F5&4x"c
} v-&^G3
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publicList find(finalString query){ Kkdd }j
return getHibernateTemplate().find \y#gh95
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(query); O:#t>
;
} PK!=3fK4\F
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publicList find(finalString query, finalObject \)`\F$CF
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parameter){ Q!|. ,?V
return getHibernateTemplate().find X]Sr]M^EK
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(query, parameter); 6BNOF66kH
} u6cWLVt
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public PaginationSupport findPageByCriteria T?NwSxGo
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(final DetachedCriteria detachedCriteria){ \S1WF?<,
return findPageByCriteria ;. /Tv84I^
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); cA AJ7?
} Kl\A&O*{
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public PaginationSupport findPageByCriteria cM.q^{d`
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(final DetachedCriteria detachedCriteria, finalint F(}d|z@@
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startIndex){ 2t/ba3Rfk
return findPageByCriteria 1&U'pp|T
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(detachedCriteria, PaginationSupport.PAGESIZE, DJT)7l {
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startIndex); !Kd/
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} *+lnAxRa?
@ U:WWTzf
public PaginationSupport findPageByCriteria sw8Ic\vT
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(final DetachedCriteria detachedCriteria, finalint __'Z0?.4#
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pageSize, auaFP-$`f
finalint startIndex){ ZXe[>H
return(PaginationSupport) b]Oc6zR,,~
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getHibernateTemplate().execute(new HibernateCallback(){ i#iY;R8
publicObject doInHibernate )6^b\`
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(Session session)throws HibernateException { v #IC
Criteria criteria = ke'p8Gz
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detachedCriteria.getExecutableCriteria(session); R~[
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int totalCount = ,|?B5n&
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((Integer) criteria.setProjection(Projections.rowCount oI/@w
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()).uniqueResult()).intValue(); uA*Op45
criteria.setProjection h9&<-k
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(null); a(BWV?A
List items = M\>y&'J-
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criteria.setFirstResult(startIndex).setMaxResults ~)Ny8Dh
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(pageSize).list(); 2gb49y~
PaginationSupport ps = ZLxe$.V_
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new PaginationSupport(items, totalCount, pageSize, _OHz 6ag
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startIndex); &=K-~!?
return ps; _QkU,[E
} rL&585
}, true); DTAEfs!ZW
} SDcD(G
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public List findAllByCriteria(final *M6M'>Tin
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DetachedCriteria detachedCriteria){ ]J?5qR:xCy
return(List) getHibernateTemplate (~zdS.
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().execute(new HibernateCallback(){ gP^'4>Jr
publicObject doInHibernate ,t(y~Z
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(Session session)throws HibernateException { nRb#M
Criteria criteria = 6pxj9@X+
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detachedCriteria.getExecutableCriteria(session); @fPiGu`L
return criteria.list(); 2p(K0PtX
} *.n9D
}, true); T->O5t c
} Y&]pC
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public int getCountByCriteria(final |P>>
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DetachedCriteria detachedCriteria){ ?v8B;="#w
Integer count = (Integer) VL7zU->
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getHibernateTemplate().execute(new HibernateCallback(){ ) l0=jb
publicObject doInHibernate FwmE1,
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(Session session)throws HibernateException { =/Vr,y$
Criteria criteria = >eW HPO
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detachedCriteria.getExecutableCriteria(session); PHT;%;m=
return !@p@u;djJ
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criteria.setProjection(Projections.rowCount Xp4pN{h e
&&Vz=6N
()).uniqueResult(); N}pE{~Y
} By:A9s
}, true); oC^-" (#
return count.intValue(); rM_8piD
} ^mkplp
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} y=G
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用户在web层构造查询条件detachedCriteria,和可选的 Y]^[|e8
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 "e@JMS
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PaginationSupport的实例ps。 Qm^N}>e
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ps.getItems()得到已分页好的结果集 n)^B0DnIk
ps.getIndexes()得到分页索引的数组 k%VV(P]sT
ps.getTotalCount()得到总结果数 G'#a&6
ps.getStartIndex()当前分页索引 CQ"5bnR
ps.getNextIndex()下一页索引 drNfFx2
ps.getPreviousIndex()上一页索引 [gqV}Y"Md
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