Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 9,Ug
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 f@J-6uQ7w
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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 96CC5
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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 %D*yXNsY
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分页支持类: C AF{7 `{
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java代码: 5I@2U vV8
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package com.javaeye.common.util; U*Pi%J
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import java.util.List; }Z\PE0
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publicclass PaginationSupport { (:T\<
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publicfinalstaticint PAGESIZE = 30; (cqVCys
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privateint pageSize = PAGESIZE; 6}e"$Ee}9
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privateList items; )3~):+
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privateint totalCount; }KwL_\>&f
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privateint[] indexes = newint[0]; 421ol
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privateint startIndex = 0; DU-&bm
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public PaginationSupport(List items, int [ !#<nY/C
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totalCount){ Q#rj>+?
setPageSize(PAGESIZE); B>M @ '
setTotalCount(totalCount); Q{+&3KXH
setItems(items); }Qm: g
setStartIndex(0); J.QFrIB{]+
} DJf!{:b)
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public PaginationSupport(List items, int r.b!3CoQ
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totalCount, int startIndex){ ULkhTB
setPageSize(PAGESIZE); uDpCW}
setTotalCount(totalCount); qA6;Q$
setItems(items); :vk TV~
setStartIndex(startIndex); b$:<T7vei
} +1%7*2q,
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public PaginationSupport(List items, int UL.x*@o
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totalCount, int pageSize, int startIndex){ WD7IF+v
setPageSize(pageSize); qx~-(|s`H
setTotalCount(totalCount); $kef_*BQg
setItems(items); oMV<Yn_<
setStartIndex(startIndex); /G h?z
} /
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publicList getItems(){ t\$P*_
return items; OWRT6R4v
} G&HCOR!h
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publicvoid setItems(List items){ '=2/0-;Jf
this.items = items; a.yCd/
} 2=PX1kI
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publicint getPageSize(){ 54%@q[-
return pageSize; 'dstAlt?
} x4C}AyR
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publicvoid setPageSize(int pageSize){ _3YuPMaN
this.pageSize = pageSize; M3U*'A\
} r{T}pc>^
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publicint getTotalCount(){ BB694
return totalCount; #DI%l`B
} U- UD27
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publicvoid setTotalCount(int totalCount){ l$~3_3+
if(totalCount > 0){ eiV[y^?
this.totalCount = totalCount; eI7FbOze
int count = totalCount / i0y^b5@MOb
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pageSize; Gb\Nqx(
if(totalCount % pageSize > 0) 8AK=FX&@&
count++; 0Y81B;/F
indexes = newint[count]; #ONad0T;
for(int i = 0; i < count; i++){ .W#-Cl&n8
indexes = pageSize * Oist>A$Z
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i; VM1`:1Z:$
} j<-#a^jb
}else{ mu[:b
this.totalCount = 0; msyC."j0jU
} qBKRm0<W
} 1'[RrJ$Q
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publicint[] getIndexes(){ (|EnRk-E
return indexes; ]{Ytf'bG
} ")t
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publicvoid setIndexes(int[] indexes){ Cz%tk}2
this.indexes = indexes; I0
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} &?R2zfcM
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publicint getStartIndex(){
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return startIndex; Z-fQ{&a{
} *oC],4y~D
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publicvoid setStartIndex(int startIndex){ f.%mp$~T
if(totalCount <= 0) <,r|*pkhp~
this.startIndex = 0; %MQU&H9[
elseif(startIndex >= totalCount) &o$z[b
this.startIndex = indexes gkJL=,
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[indexes.length - 1]; >VQP,J{
elseif(startIndex < 0) i:6`Rmz1.
this.startIndex = 0; $?.0>0,<
else{ yM*-em
this.startIndex = indexes vU:FDkx*nn
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[startIndex / pageSize]; ;#F/2UgHB
} 5/vfmDt3'G
} INi9`M.h
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publicint getNextIndex(){ PJq;OM|
int nextIndex = getStartIndex() + yMU>vr
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pageSize; Z`UwXp_s
if(nextIndex >= totalCount) h%9>js^~
return getStartIndex(); ;"}yVV/4
else >tUi ;!cQ
return nextIndex; F3-<F_4.w
} ,f4VV\
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publicint getPreviousIndex(){ e7m>p\"
int previousIndex = getStartIndex() - $2p=vi3
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pageSize; #H'j;=]:
if(previousIndex < 0) _2eRH@T
return0; 6zo'w Wc3
else *>lh2sslL
return previousIndex; \~sc6ho
} VH.mH<
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} !e8OC9_x
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抽象业务类 @%(Vi!Cv"R
java代码: SdOa#U)
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/** j20/Q)=h
* Created on 2005-7-12 KASuSg+
*/ +-DF3(
package com.javaeye.common.business; OcA_m.
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import java.io.Serializable; e-!6m#0
import java.util.List; scf.>K2
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import org.hibernate.Criteria; WH>= *\
import org.hibernate.HibernateException; (Dy6I;S
import org.hibernate.Session; >@b]t,rrK
import org.hibernate.criterion.DetachedCriteria; R`[jkJrc
import org.hibernate.criterion.Projections; B]KR *
import DFgQ1:6[
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org.springframework.orm.hibernate3.HibernateCallback; z\d{A7
import 8#m,TOp
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org.springframework.orm.hibernate3.support.HibernateDaoS prHM}n{0
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upport; .3X5~OH
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import com.javaeye.common.util.PaginationSupport; e=>:(^CS
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public abstract class AbstractManager extends #x?Ku\ts
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HibernateDaoSupport { K nl`[Nl
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privateboolean cacheQueries = false; l}bAwJ?
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privateString queryCacheRegion; og`rsl
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publicvoid setCacheQueries(boolean GI se|[p
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cacheQueries){ ww}4
this.cacheQueries = cacheQueries; t5| }0ID-
} ~ u)}/
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publicvoid setQueryCacheRegion(String Bj=lUn`T:
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queryCacheRegion){ i,H(6NL.
this.queryCacheRegion = i/C`]1R/
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queryCacheRegion; *:5S*E&}V
} GM~Ek]9C%
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publicvoid save(finalObject entity){ L@5j? N?F
getHibernateTemplate().save(entity); 3s]aXz:
} <2n5|.:>
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publicvoid persist(finalObject entity){ {\WRW}iO
getHibernateTemplate().save(entity); 2;wpD2
} g"Tb\
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publicvoid update(finalObject entity){ kqH:H~sgD
getHibernateTemplate().update(entity); eh39"s
} o=nF .y
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publicvoid delete(finalObject entity){ V&h{a8xa$
getHibernateTemplate().delete(entity); ;p(I0X
} r4isn^g
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publicObject load(finalClass entity, 33=lR-N#
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finalSerializable id){ :`>$B?x+
return getHibernateTemplate().load k-Z:z?M
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(entity, id); e7Sp?>-d
} 8nu@6 )#
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publicObject get(finalClass entity, Ol
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finalSerializable id){ 3;O4o]`
return getHibernateTemplate().get ;e"dxAUe!^
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(entity, id); 8345
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} T4nWK!}z
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publicList findAll(finalClass entity){ 4
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return getHibernateTemplate().find("from i91 =h
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" + entity.getName()); O**~ Tj
} }G)2HTaZ
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publicList findByNamedQuery(finalString *N|ak =
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namedQuery){ tb^/jzC
return getHibernateTemplate 4J1_rMfh
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().findByNamedQuery(namedQuery); lu?:1V-
} k%TBpG:T
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publicList findByNamedQuery(finalString query, *EwDwS$$
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finalObject parameter){ xHD$0eq
return getHibernateTemplate b['v0x
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().findByNamedQuery(query, parameter); <])]1r8
} |vw],r6
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publicList findByNamedQuery(finalString query, X<D fzd oI
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finalObject[] parameters){ #tIeI6Qw
return getHibernateTemplate sVpET
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().findByNamedQuery(query, parameters); MtVvi6T
} /^L<q
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publicList find(finalString query){ vqAEF^HYry
return getHibernateTemplate().find ;X
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(query); @6
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} >WA'/Sl<A<
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publicList find(finalString query, finalObject )<f4F!?,A
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parameter){ ["#H/L]3
return getHibernateTemplate().find X`(fJ',
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(query, parameter); c*y*UG
} O#k eoC4
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public PaginationSupport findPageByCriteria .EReYZO
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(final DetachedCriteria detachedCriteria){ o`Af6C;Q
return findPageByCriteria )MF 4b][
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n
(detachedCriteria, PaginationSupport.PAGESIZE, 0); *b_Iby-ZD
} }4T `)
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public PaginationSupport findPageByCriteria ))dw[Xa
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(final DetachedCriteria detachedCriteria, finalint
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startIndex){ ,c-*/{3
return findPageByCriteria w59q* 2
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(detachedCriteria, PaginationSupport.PAGESIZE, :7i x`C2
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startIndex); )4h|7^6ji
} A.mFa1lH
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public PaginationSupport findPageByCriteria gnkeJ}K
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(final DetachedCriteria detachedCriteria, finalint l =t/"M=
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pageSize, "TP~TjXfq
finalint startIndex){ o:&8H>(hn]
return(PaginationSupport) B9Mp3[
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getHibernateTemplate().execute(new HibernateCallback(){ ^<Gxip
publicObject doInHibernate A|4om=MO
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(Session session)throws HibernateException { #jzF6j%G
Criteria criteria = -LT!LBnEkf
8#HnV%|N
detachedCriteria.getExecutableCriteria(session); HI{h>g T
int totalCount = ~]#-S20
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((Integer) criteria.setProjection(Projections.rowCount `K:n=hpF
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()).uniqueResult()).intValue(); _BY+Tfol
criteria.setProjection 4Y}Nu
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(null); *>"NUHq
List items = :nR80]
}K@m4`T
criteria.setFirstResult(startIndex).setMaxResults )-ojm$
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(pageSize).list(); 4:S]n19nq
PaginationSupport ps = SSCs96
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new PaginationSupport(items, totalCount, pageSize, OjAdY\
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startIndex); !*L)v
return ps; $U.|
}
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}, true); + kT ]qH
} pdR\Ne0P*
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public List findAllByCriteria(final W!R0:-
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DetachedCriteria detachedCriteria){ |O6/p7+.
return(List) getHibernateTemplate KO7&