Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 :UDe\zcd"
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 wU5= '
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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 n}q/:|c
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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 ;3N>m|?D=
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分页支持类: uh~,>~a|
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java代码: 8MCSU'uQ
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package com.javaeye.common.util; UC?i>HsJrX
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import java.util.List; M!]g36h[
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publicclass PaginationSupport { gz`P~7-w:
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publicfinalstaticint PAGESIZE = 30; G+jcR; s
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privateint pageSize = PAGESIZE; i>AKXJ+
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privateList items; =/qj vY
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privateint totalCount; OeY+Yt0
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privateint[] indexes = newint[0]; qeoj
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privateint startIndex = 0; "?Xb$V7
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public PaginationSupport(List items, int +L<x0-&
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totalCount){ "pkn
setPageSize(PAGESIZE); x-ZCaa}O
setTotalCount(totalCount); c!>",rce
setItems(items); k[;(@e@c
setStartIndex(0); Ih5F\eM
} H%`|yUE(
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public PaginationSupport(List items, int g+92}$_
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totalCount, int startIndex){ :X~{,J
setPageSize(PAGESIZE); )x&OdFX
setTotalCount(totalCount); &oqzQ+H
setItems(items); UNd+MHE74I
setStartIndex(startIndex); St~a/Lq6
} %%Z|6V74
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public PaginationSupport(List items, int D*o[a#2_
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totalCount, int pageSize, int startIndex){ h**mAa0fo
setPageSize(pageSize); FQ6{NMz,h
setTotalCount(totalCount); gIaPS0Q
setItems(items); =[V
setStartIndex(startIndex); Z\P&i#
} 9x[|75}l
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publicList getItems(){ PEHaH"|([=
return items; s9}V nNr
} !JVpR]lWS
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publicvoid setItems(List items){ iWu^m+"k
this.items = items; qox31pnS
} %y}l^P5z
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publicint getPageSize(){ Na2n4x!
return pageSize; (.54`[2+L
} 5Rec~&v
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publicvoid setPageSize(int pageSize){ gay6dj^
this.pageSize = pageSize; >\c"U1%E
} +idp1SJ4
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publicint getTotalCount(){ ti^msC8e
return totalCount; \LZVazXD
} ^zVBS7`J
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publicvoid setTotalCount(int totalCount){ !]z6?kUK
if(totalCount > 0){ S`?cs^?
this.totalCount = totalCount; gw);b)&mx
int count = totalCount / _f5n
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pageSize; b".e6zev
if(totalCount % pageSize > 0) WF0[/Y
count++; A('_.J=
indexes = newint[count]; O*zF` 9
for(int i = 0; i < count; i++){ fA>FU/r
indexes = pageSize * #'jd.'>
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} SH${ \BKup
}else{ SvD^'(
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this.totalCount = 0; t)/:VImY
} ^-i<TJ
} ;+h-o
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publicint[] getIndexes(){ 3m9ab"
return indexes; )dgooq
} -^%YrWgd?
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publicvoid setIndexes(int[] indexes){ EZvf\s>LT
this.indexes = indexes; qkbxa?&X
} )0 W-S9e<
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publicint getStartIndex(){ =-U8^e_Y
return startIndex; YKT=0
} IJt8*
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publicvoid setStartIndex(int startIndex){ -N]%)Hy
if(totalCount <= 0) l
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this.startIndex = 0; (jY -MF3
elseif(startIndex >= totalCount) ,:1_I`d>#X
this.startIndex = indexes E)=X8y
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[indexes.length - 1]; j[Xci<m
elseif(startIndex < 0) dW8M^A&
this.startIndex = 0; PRE\2lLY
else{ (]l}QR%Bxu
this.startIndex = indexes 6#rj3^]
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[startIndex / pageSize]; `K^j:fE7n
} 8P#jC$<
} DNN60NX 5Q
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publicint getNextIndex(){ Y$SwQ;wl
int nextIndex = getStartIndex() + y! lEGA7
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pageSize; ^cy.iolt
if(nextIndex >= totalCount) 'U"ub2j
return getStartIndex(); T@ecWRro
else uqg#(ADy?R
return nextIndex; Px<*n '~}
} zz1e)W/
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publicint getPreviousIndex(){ ;^K4kK&f
int previousIndex = getStartIndex() -
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pageSize; Y79{v nlGk
if(previousIndex < 0) X( H-U
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return0;
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else sZ!/uN!6
return previousIndex; CI };$4W~
} XvIrO]F-
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} k5%:L2FO
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抽象业务类 4x'N#m{p
java代码: U%~L){<V[
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/** U[Pll~m2b
* Created on 2005-7-12 C
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*/ -`o22G3w
package com.javaeye.common.business; ?xbPdG":R
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import java.io.Serializable; [e:mRMi
import java.util.List; [aK7v{Wu
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import org.hibernate.Criteria; _m+64qG_8'
import org.hibernate.HibernateException; BrQXSN$i
import org.hibernate.Session; 6H\apgHm
import org.hibernate.criterion.DetachedCriteria; X~ AE??
import org.hibernate.criterion.Projections; '<35XjW
import 1~HR;cTv=
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org.springframework.orm.hibernate3.HibernateCallback; J,bE[52
import 9ntXLWK7e
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org.springframework.orm.hibernate3.support.HibernateDaoS Y0||>LX
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upport; '01ifA^
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import com.javaeye.common.util.PaginationSupport; %S<0l@=5`l
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public abstract class AbstractManager extends JDyP..Dt
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HibernateDaoSupport { )9L:^i6
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privateboolean cacheQueries = false; `~bnshUk
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privateString queryCacheRegion; =vv4;az
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publicvoid setCacheQueries(boolean 4EO,9#0
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cacheQueries){ YmS}*>oz
this.cacheQueries = cacheQueries; GJL lMi
} ]&')#YO
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publicvoid setQueryCacheRegion(String `(r[BV|h}
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queryCacheRegion){ yJ(p-3O5
this.queryCacheRegion = MmjeFv
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queryCacheRegion; 26c,hPIeXY
} V0,%g+.^
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publicvoid save(finalObject entity){ Q.q'pJ-
getHibernateTemplate().save(entity); ccUq!1
} ?3Ytn+Py
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publicvoid persist(finalObject entity){ Qz+hS\yx
getHibernateTemplate().save(entity); pV>M,f
} s/,wyxKd
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publicvoid update(finalObject entity){ e%(,)WlTaU
getHibernateTemplate().update(entity); |z!Y,zaX
} 3J2j5N:g
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publicvoid delete(finalObject entity){ 6iiH+Nc
getHibernateTemplate().delete(entity); -/>SdR$D7
} 88)F-St
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publicObject load(finalClass entity, r*|#*"K"a
ay\ e#)
finalSerializable id){ \;z*j|;B
return getHibernateTemplate().load { XN"L3A
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(entity, id); Fxu'(xa
} TwlrncK*
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publicObject get(finalClass entity, d66
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finalSerializable id){ <p<J;@
return getHibernateTemplate().get |fx*F}1
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(entity, id); cr{;gP
} E,]G Ek
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publicList findAll(finalClass entity){ o1j_5c
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return getHibernateTemplate().find("from zCvt"!}RRa
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" + entity.getName()); nM+(
} wic&
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publicList findByNamedQuery(finalString eIzT(3(
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namedQuery){ de?Bn+mvi.
return getHibernateTemplate SjT8eH #
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().findByNamedQuery(namedQuery); cxBu2(Y
} Hshm;\'
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publicList findByNamedQuery(finalString query, [NE:$@
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finalObject parameter){ 5]/i[T_
return getHibernateTemplate rZ0+mS'/G
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().findByNamedQuery(query, parameter); X>Cl{.
} B|Y6;4?
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publicList findByNamedQuery(finalString query, rkF]Q_'`t;
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finalObject[] parameters){ +Ar=89
return getHibernateTemplate "~y@rqIba
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().findByNamedQuery(query, parameters); Zrtyai{8l
} -^m]Tb<u
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publicList find(finalString query){ q[l!kC+Eh
return getHibernateTemplate().find E2 M|b
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(query); i%m]<yElm
} kW"6Gc&HUN
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publicList find(finalString query, finalObject 5&WYL
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parameter){ ~J}{'l1{yf
return getHibernateTemplate().find
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(query, parameter); Sm6hyZFy
} 39jnoT
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public PaginationSupport findPageByCriteria 6I0G.N
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(final DetachedCriteria detachedCriteria){ 3jMHe~.E<
return findPageByCriteria ')kn
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); Q/oe l'O*x
} ai7*</ls
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public PaginationSupport findPageByCriteria N/ 7Q(^
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(final DetachedCriteria detachedCriteria, finalint 2!Ip!IQ:
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startIndex){ C5Fk>[fS
return findPageByCriteria "pdq_35
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(detachedCriteria, PaginationSupport.PAGESIZE, Q;]g9T[)
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startIndex); 8]!%mrS
} r|U'2+vn
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public PaginationSupport findPageByCriteria R5i v]8X4W
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(final DetachedCriteria detachedCriteria, finalint \`:X37n)0q
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pageSize, %#!pAUP\&
finalint startIndex){ %d..L-`]ET
return(PaginationSupport) >'>onAIL
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getHibernateTemplate().execute(new HibernateCallback(){ 3l?D%E]P
publicObject doInHibernate 7Sc._G{[%
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(Session session)throws HibernateException { g<,kV(_7
Criteria criteria = [yzDa:%
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detachedCriteria.getExecutableCriteria(session); ~&>|u5C*@
int totalCount = Rj&V~or
g. V6:>,
((Integer) criteria.setProjection(Projections.rowCount )sWC5\
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()).uniqueResult()).intValue(); E^uWlUb{
criteria.setProjection 7M~w05tPh
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(null); ( Z-~Eh
List items = 5r;M61
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criteria.setFirstResult(startIndex).setMaxResults i
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(pageSize).list(); ich\`j[i
PaginationSupport ps = cR0+`&
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new PaginationSupport(items, totalCount, pageSize, =yn|.%b
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startIndex); +9S_H(
return ps; ! }u'%
} crV2T
}, true); iHKWz)0
} ^j"*-)R
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public List findAllByCriteria(final gwvy$H
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DetachedCriteria detachedCriteria){ pNY+ E5
return(List) getHibernateTemplate !{@!:m3w
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().execute(new HibernateCallback(){ wYTF:Ou^5~
publicObject doInHibernate 7O3 \
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(Session session)throws HibernateException { [I*BEJ;W'
Criteria criteria = .Rq|F
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detachedCriteria.getExecutableCriteria(session); (A.%q1h
return criteria.list(); <"|BuK
} ~HbZRDcJc
}, true); O2[uN@nY
} ekB!d
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public int getCountByCriteria(final P4vW.|@
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DetachedCriteria detachedCriteria){ l1X&Nw1W
Integer count = (Integer) :b^\O
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getHibernateTemplate().execute(new HibernateCallback(){ Z-(V fp4
publicObject doInHibernate l`s_Id#
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(Session session)throws HibernateException { y993uP
Criteria criteria = 16q"A$
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detachedCriteria.getExecutableCriteria(session); ,U_p6TV5
return -\mbrbG9H
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criteria.setProjection(Projections.rowCount Y|bCbaF
:-x F=Y(;
()).uniqueResult(); S<Zb>9pl
} w!{g^*R+!
}, true); v1h*/#
return count.intValue(); K8 Y/sHl
} j(Tt-a("z
} =i jGB~
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用户在web层构造查询条件detachedCriteria,和可选的 RC5b'+E