Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 \Tkp
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 4J}3,+
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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 26PD[af64O
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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 mz-N{ >k
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分页支持类: 3#mE(
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java代码: 3+zzi
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package com.javaeye.common.util; 0_HJ.g!
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import java.util.List; -XW8 LaQB
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publicclass PaginationSupport { .hne)K%={y
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publicfinalstaticint PAGESIZE = 30; ^'YHJEK
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privateint pageSize = PAGESIZE; CjV7q y
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privateList items; 5p{25N_t
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privateint totalCount; Gym#b{#":
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privateint[] indexes = newint[0]; FE}s#n_Pd
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privateint startIndex = 0; )w3
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public PaginationSupport(List items, int PJ;.31u
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totalCount){ 1q`k}KMy
setPageSize(PAGESIZE); Bs@:rhDi
setTotalCount(totalCount); G g(NGT
setItems(items); BjB&[5?z
setStartIndex(0); ?(>k,[n
} G
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public PaginationSupport(List items, int iel-<(~
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totalCount, int startIndex){ %rw}u"3T
setPageSize(PAGESIZE); uct=i1+ fE
setTotalCount(totalCount); M6&~LI.We=
setItems(items); A`IHP{aB
setStartIndex(startIndex); 9p4%8WhJ
} L7<+LA)s0
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public PaginationSupport(List items, int pbPz$Y
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totalCount, int pageSize, int startIndex){ i`R(7Z
setPageSize(pageSize); 9lKRL'QR
setTotalCount(totalCount); B_!wutV@
setItems(items); w"BIv9N
setStartIndex(startIndex); &jt02+Hj'
} :Jm!=U%'Z
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publicList getItems(){ &{BBxv)y
return items; xUIvLH=
} b'&LBT7
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publicvoid setItems(List items){ z}iSq$
this.items = items; gU~
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} 7&h\l6}Yh
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publicint getPageSize(){ ::v;)VdX+*
return pageSize; u2Y N[|V
} 5[nmP95YK
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publicvoid setPageSize(int pageSize){ :,jPNuOA
this.pageSize = pageSize; &ycjSBK
} =[ s8q2V
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publicint getTotalCount(){ cW=Qh-`jU;
return totalCount; dJloH)uJZ>
} HJc<Gwm
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publicvoid setTotalCount(int totalCount){ L^6"'#
if(totalCount > 0){ kea e.6[
this.totalCount = totalCount; SE6>vKR/.
int count = totalCount / /g13X,.H
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pageSize; d:A\<F
if(totalCount % pageSize > 0) 9*BoYFw92*
count++; C(f$!~M4b
indexes = newint[count]; cZ6?P`X
for(int i = 0; i < count; i++){ n/xXQ7y
indexes = pageSize * 1aBD^^Y
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} f#*h^91x
}else{ su,`q
this.totalCount = 0; =g/4{IL%
} Cq-hPa}2
} (}9cD^F0n
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publicint[] getIndexes(){ <9=zP/Q
return indexes; &\JK%X.Jlt
} !>CE(;E>z
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publicvoid setIndexes(int[] indexes){ XPar_8I
this.indexes = indexes; $5ZR[\$
} uCY(:;[<
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publicint getStartIndex(){ 3yeK@>C
return startIndex; ?lu_}t]
} KK@
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publicvoid setStartIndex(int startIndex){ 3Cq6h;!#
if(totalCount <= 0) 2 9&sydu
this.startIndex = 0; D."cQ<sxpN
elseif(startIndex >= totalCount) 3?!G-
this.startIndex = indexes N7d17c.
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[indexes.length - 1]; q>Q:X3
elseif(startIndex < 0) qFV;n6&V
this.startIndex = 0; mgmWDtxN
else{ RY>)eGJ
this.startIndex = indexes ;b, -$A
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[startIndex / pageSize]; r^?)F?n!
} @N,:x\
} clh3
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publicint getNextIndex(){ QH@Q\
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int nextIndex = getStartIndex() + J xA^DH
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pageSize; \(.nPW]9
if(nextIndex >= totalCount) P5'iYahCq_
return getStartIndex(); <;2P._oZ
else
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return nextIndex; Qv9*p('~A
} 08TaFzP81
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publicint getPreviousIndex(){ -ET*M<
int previousIndex = getStartIndex() - oUW)H
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pageSize; 8>C;
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if(previousIndex < 0) ib5;f0Qa
return0; 8m#}S\m
else [}W^4,
return previousIndex; -/(DPx
} {0NsDi>(2
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} an*]62 l
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抽象业务类 @A~B
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java代码: n/9 LRZD|w
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/** )64LKb$
* Created on 2005-7-12 KuIt[oM
*/ @+0@BO12
package com.javaeye.common.business; 1kB'sc3N!
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import java.io.Serializable; fP^W"y
import java.util.List; LVR;&Z>j
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import org.hibernate.Criteria; lfU"SSQ
import org.hibernate.HibernateException; 1M%{Uqsd -
import org.hibernate.Session; ?V&Ld$db
import org.hibernate.criterion.DetachedCriteria; w6WGFQ_ %
import org.hibernate.criterion.Projections; ]t.WJC %
import :wv
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org.springframework.orm.hibernate3.HibernateCallback; 1=9qAp;?o
import W,9k0t
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org.springframework.orm.hibernate3.support.HibernateDaoS _/QKWk&j
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upport; x*loACee.
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import com.javaeye.common.util.PaginationSupport; }<5\O*kX4
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public abstract class AbstractManager extends M(.uu`B
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HibernateDaoSupport { wS F!Xx0
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privateboolean cacheQueries = false; qHC*$v#.V?
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privateString queryCacheRegion; :|3"H&FWK
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publicvoid setCacheQueries(boolean nK?k<
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cacheQueries){ {|Mxvp*Hg
this.cacheQueries = cacheQueries; 3&a*]
} 323yAF
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publicvoid setQueryCacheRegion(String c"%_]7
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queryCacheRegion){ 1eE]4Z4Q
this.queryCacheRegion = T 9<H%iF
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queryCacheRegion; cjy0s+>>
} y :i[~ y
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publicvoid save(finalObject entity){ }OX>(
getHibernateTemplate().save(entity); %4r!7X|O<
}
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publicvoid persist(finalObject entity){ 4Rrw8Bw
getHibernateTemplate().save(entity); Ol/2%UJXL
} IJ
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publicvoid update(finalObject entity){ \DcC1W
getHibernateTemplate().update(entity); % b>y
} $E4O^0%/p
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publicvoid delete(finalObject entity){ L!+[]tB
getHibernateTemplate().delete(entity); 5EV8zf
} 8&2gM
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publicObject load(finalClass entity, RqX4ep5j
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finalSerializable id){ sxC{\iLY%
return getHibernateTemplate().load ,39$iHk
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(entity, id); JI[rIL\Ey
} HZr/0I?
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publicObject get(finalClass entity, *2m&?,nJ
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finalSerializable id){ U*qK*"k
return getHibernateTemplate().get RfKxwo|M<
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(entity, id); ;ijfI
} u7y7
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publicList findAll(finalClass entity){ lA^Kh
return getHibernateTemplate().find("from B,VSFpPx
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} W*/s4 N
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publicList findByNamedQuery(finalString tgF(=a]o
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namedQuery){ zC>(!fJqq
return getHibernateTemplate ?=@Q12R)X
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().findByNamedQuery(namedQuery); G'}_ZUy#
} I#6'
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publicList findByNamedQuery(finalString query, HI?~t|[y
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finalObject parameter){ 4z3$
return getHibernateTemplate "y
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().findByNamedQuery(query, parameter); [@FeRIu8
} 3L!&~'.Ro
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publicList findByNamedQuery(finalString query, vheAh`u^&
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finalObject[] parameters){ <!HDtN
return getHibernateTemplate 0@/E%T1c"
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().findByNamedQuery(query, parameters); :)V0zHo&(
} +5}T!r
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publicList find(finalString query){ FCB/FtI0
return getHibernateTemplate().find Qs[EA_
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(query); pYvF}8
} jxOVH+?l%
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publicList find(finalString query, finalObject U[ O!&:6
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parameter){ y?4=u,{C
return getHibernateTemplate().find xcRrI|?eC
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(query, parameter); #w?%&,Kp
} o|n0?bThS-
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public PaginationSupport findPageByCriteria @:&dOqQ
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(final DetachedCriteria detachedCriteria){ [&kk
return findPageByCriteria f2e$BA
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); w3|.4hS
} DmA!+
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public PaginationSupport findPageByCriteria ['`'&+x&!
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(final DetachedCriteria detachedCriteria, finalint U5%]nT"[]
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startIndex){ ?Lb7~XKt\
return findPageByCriteria &`y_R'
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(detachedCriteria, PaginationSupport.PAGESIZE, _BaS\U%1(
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startIndex); _^$b$4)
} 05zdy-Fb
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public PaginationSupport findPageByCriteria J3E:r_+
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(final DetachedCriteria detachedCriteria, finalint xH-k~#
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pageSize, #`wfl9tj
finalint startIndex){ Ekp
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return(PaginationSupport) Nxk'!:
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getHibernateTemplate().execute(new HibernateCallback(){ *3oQS"8
publicObject doInHibernate G2k71{jK
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(Session session)throws HibernateException { \:28z
Criteria criteria = +a@SdWf
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detachedCriteria.getExecutableCriteria(session); 9jBr868
int totalCount = 45JLx?rN_
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((Integer) criteria.setProjection(Projections.rowCount Y0'^S<ox
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()).uniqueResult()).intValue(); $
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criteria.setProjection +6E<+-N
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(null); N=x,96CF
List items = CBHWMetJ*
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criteria.setFirstResult(startIndex).setMaxResults c(JO;=,@9
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(pageSize).list(); n-WvIy
PaginationSupport ps = Ctx K{:
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new PaginationSupport(items, totalCount, pageSize, YZD]<ptR
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startIndex); >r Glj
return ps; N|d@B{a(
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}, true); |a3b2x,
} 8b
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public List findAllByCriteria(final r73Xh"SL
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DetachedCriteria detachedCriteria){ *()#*0
return(List) getHibernateTemplate ;T(^riAEl
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().execute(new HibernateCallback(){ Kep?=9r4+
publicObject doInHibernate 3M`J.>
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(Session session)throws HibernateException { X}
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Criteria criteria = ]|(?i ,p
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detachedCriteria.getExecutableCriteria(session); ^.7xu/T
return criteria.list(); bSzb! hT`
} d{jl&:
}, true); ujBADDwOg)
} X*&r/=
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public int getCountByCriteria(final !Ai;S
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DetachedCriteria detachedCriteria){ s,=^V/c
Integer count = (Integer) ;!b(b%
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getHibernateTemplate().execute(new HibernateCallback(){ L M[<?`%p
publicObject doInHibernate yo=d"*E4^
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(Session session)throws HibernateException { qK
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Criteria criteria = ~f:fOrLE#
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detachedCriteria.getExecutableCriteria(session); J/ ~]A1fP6
return Z9y:}:j"
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criteria.setProjection(Projections.rowCount Q*5d~Yr ]R
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()).uniqueResult(); Gy5W;,$q
} :1I,:L
}, true); nK[$ID
return count.intValue(); E7,\s
} rv[\2@}
} go@}r<