Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 s
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 1&U>,;]*
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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 @#-q^}3
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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 ze]h..,]K
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分页支持类: `kJ^zw+
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java代码: =%BZ9,l
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package com.javaeye.common.util; dB5b@9*
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import java.util.List; EB8\_]6XJ
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publicclass PaginationSupport { Bb"Bg\le,^
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publicfinalstaticint PAGESIZE = 30; A,LuD.8
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privateint pageSize = PAGESIZE; =Fr(9(
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privateList items; E!P yL>){
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privateint totalCount; k4[|'Dk?
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privateint[] indexes = newint[0]; oczN5YSt
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privateint startIndex = 0; i0$kit
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public PaginationSupport(List items, int #: [<iSk
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totalCount){ '5|h)Q5
setPageSize(PAGESIZE); *N<&GH(j
setTotalCount(totalCount); ]f({`&K5
setItems(items); $
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setStartIndex(0); j_.5r&w
} 9^G/8<^^>
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public PaginationSupport(List items, int Gnq?"</
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totalCount, int startIndex){ x-?Sn' m
setPageSize(PAGESIZE); F
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setTotalCount(totalCount); &?yZv{
setItems(items); \hEN4V[
setStartIndex(startIndex); 0p!>JQ]m
} Ot6aRk
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public PaginationSupport(List items, int YS *9t
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totalCount, int pageSize, int startIndex){ @6]sNm
setPageSize(pageSize); 4k@5/5zsM
setTotalCount(totalCount); 'GS"8w~j
setItems(items); ?}U(3
setStartIndex(startIndex); ub\MlSr
} cLsV`@J(k
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publicList getItems(){ ?1K#dC52#
return items; l)&X$3? tz
} jGpN,/VQa
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publicvoid setItems(List items){ Lja>8m
this.items = items; ne_TIwf w-
} n4R(.N00
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publicint getPageSize(){ 'DL`Ee\
return pageSize; [8*jw'W|[
} HV{wI1
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publicvoid setPageSize(int pageSize){ ,l:ORoND
this.pageSize = pageSize; n
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} D)m5
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publicint getTotalCount(){ bj>v|#r^
return totalCount; 1]@}|
} $',K7%y
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publicvoid setTotalCount(int totalCount){ )quM4=u'
if(totalCount > 0){ (2^gVz=j
this.totalCount = totalCount; Y6zbo
int count = totalCount / t>`asL
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pageSize; }}\vV} s
if(totalCount % pageSize > 0) 8T!+ZQAz
count++; x:7b/j-
indexes = newint[count]; 4GY[7^
for(int i = 0; i < count; i++){ LXC9I/j/
indexes = pageSize * ;;C?{
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} uao0_swW5
}else{ SEGri#s
this.totalCount = 0; 1p/3!1
} `lO[x.[
} _/6!yyl
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publicint[] getIndexes(){ a1t4Dd
return indexes; U |Jo{(Y
} /
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publicvoid setIndexes(int[] indexes){ C/vIEYG4
this.indexes = indexes; O4cr*MCb5
} <UV1!2nv*
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publicint getStartIndex(){ rvbLyv;~
return startIndex; \]2]/=2tLd
} qln3 k`
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publicvoid setStartIndex(int startIndex){ q_g+Jf
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if(totalCount <= 0) \{Z;:,S
this.startIndex = 0; B8V>NvE~o
elseif(startIndex >= totalCount) ES.fOdx
this.startIndex = indexes {|&5_][
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[indexes.length - 1]; kb{]>3Y"
elseif(startIndex < 0) (e!0]Io@
this.startIndex = 0; LcB]Xdsa(
else{ F+,~v-
this.startIndex = indexes 0=* 8
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[startIndex / pageSize]; K1r#8Q!t
} ftvG\T f
} E9Np 0M<
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publicint getNextIndex(){ 1zm ulj%&
int nextIndex = getStartIndex() + tiB_a}5IB
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pageSize; 8\^}~s$$A
if(nextIndex >= totalCount) uxtWybv
return getStartIndex(); -Zf@VW,NI
else Xjo5v*P u
return nextIndex; <>s`\ %
} cZB7fmq%
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publicint getPreviousIndex(){ 3D!5T8 @
int previousIndex = getStartIndex() - NdtB1b
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pageSize; J&[@}$N
if(previousIndex < 0) U3T#6Rptl
return0; zVXC1u9B
else %W%9j#!aN
return previousIndex; ^?cz,N~
} `x
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抽象业务类 "U!AlZ`g
java代码: F~%]6^$w
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/** {5%5}[/x
* Created on 2005-7-12 IE;~?W"
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package com.javaeye.common.business; p2n0Z\2
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import java.io.Serializable; eqP&8^HP
import java.util.List;
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import org.hibernate.Criteria; 1<BX]-/tP
import org.hibernate.HibernateException; O4r0R1VQM
import org.hibernate.Session; @y='^DQ*
import org.hibernate.criterion.DetachedCriteria; 5b!vgm#])
import org.hibernate.criterion.Projections; MHh~vy'HB5
import =NnNN'}
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org.springframework.orm.hibernate3.HibernateCallback; ^HV>`Pjd}=
import g#F?!i-[F
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org.springframework.orm.hibernate3.support.HibernateDaoS kSR\RuY*
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upport; PJ]];MQ
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import com.javaeye.common.util.PaginationSupport; r G4';V^q
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public abstract class AbstractManager extends v%"|WV[N
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HibernateDaoSupport { 4a'N>eDR
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privateboolean cacheQueries = false; k.uMp<)D
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privateString queryCacheRegion; ^.1c{0Y^0
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publicvoid setCacheQueries(boolean {DU`[:SQZg
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cacheQueries){ pPc TrN'
this.cacheQueries = cacheQueries; Z @^9PQG$
} i'9vL:3
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publicvoid setQueryCacheRegion(String :?/cPg'D
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queryCacheRegion){ &Q>k7L!
this.queryCacheRegion = 7g%E`3)"
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queryCacheRegion; i%/Jp[e\W>
} MC<PM6w
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publicvoid save(finalObject entity){ B?4boF?~
getHibernateTemplate().save(entity); <)u`~$n2
} ,wIONDnLZ
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publicvoid persist(finalObject entity){ $e*ce94
getHibernateTemplate().save(entity); 5\e9@1Rc
} c&AygqN
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publicvoid update(finalObject entity){ dR"@`
getHibernateTemplate().update(entity); my}-s
} -?mfE+kt
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publicvoid delete(finalObject entity){ qNYN-f~@,
getHibernateTemplate().delete(entity); 13@|w1/Z
} R:#k%}W
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publicObject load(finalClass entity, CC L
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finalSerializable id){ r]b_@hT',
return getHibernateTemplate().load K#pNec
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(entity, id); \'|>p/5I
} C!fMW+C@
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publicObject get(finalClass entity, Y*H|?uNF
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finalSerializable id){ BK,{N0
return getHibernateTemplate().get kzt(i Y_6
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(entity, id); vTJ}8
} hM{{\yZS
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publicList findAll(finalClass entity){ Jo@|"cE=
return getHibernateTemplate().find("from R}q>O5O
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" + entity.getName()); oxz OA
} cd$m25CxC
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publicList findByNamedQuery(finalString z7Q?D^miy
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namedQuery){ LIZRoG8
return getHibernateTemplate _nbBIaHN{
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().findByNamedQuery(namedQuery); >g+?Oebgw
} UrYZ`J
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publicList findByNamedQuery(finalString query, il:$sd
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finalObject parameter){ 1:f9J
return getHibernateTemplate >rJnayLF
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().findByNamedQuery(query, parameter); 763v
} ni<A3OB
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publicList findByNamedQuery(finalString query, YwZ
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finalObject[] parameters){ ReM=eS
return getHibernateTemplate pO ml8SQf
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().findByNamedQuery(query, parameters); v(EEG/~
} +YqZ((
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publicList find(finalString query){ ~:3QBMk::
return getHibernateTemplate().find mxz-4.
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(query); 0IfKJ*]M
} DR c)iE>@
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publicList find(finalString query, finalObject Vzwc}k*Y
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parameter){ O }(VlR2
return getHibernateTemplate().find _g~qu
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(query, parameter); M
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} op6CA "w
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public PaginationSupport findPageByCriteria m<0&~rg
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(final DetachedCriteria detachedCriteria){ unBy&?&p
return findPageByCriteria D?0zhU
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); j&
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} C@bm
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public PaginationSupport findPageByCriteria I+dbZBX
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(final DetachedCriteria detachedCriteria, finalint ui@2s;1t
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startIndex){ .] sf0S!
return findPageByCriteria rwG CUo6Z
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(detachedCriteria, PaginationSupport.PAGESIZE, U)o$WH.b
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startIndex); UGuxV+Nwf
} Fm #w2o
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public PaginationSupport findPageByCriteria r%.do;5
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(final DetachedCriteria detachedCriteria, finalint 9M1d%jT
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pageSize, 7g(F#T?;'
finalint startIndex){ o4zM)\;F
return(PaginationSupport) H)>;/#!r-
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getHibernateTemplate().execute(new HibernateCallback(){ FN%m0"/Z{t
publicObject doInHibernate >B2q+tA
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(Session session)throws HibernateException { 2w-51tqm
Criteria criteria = Hx\H $Y
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detachedCriteria.getExecutableCriteria(session); Ko/ I#)
int totalCount = ]sGHG^I6
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((Integer) criteria.setProjection(Projections.rowCount cPU/tkc
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()).uniqueResult()).intValue(); sSQs#+&=[
criteria.setProjection r,Nq7Txn?
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(null); LJ(1RK GCz
List items = 3neIR@W
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criteria.setFirstResult(startIndex).setMaxResults KhW;RD
}GZ}Q5
(pageSize).list(); `p7&>
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PaginationSupport ps = K%Rj8J7|u?
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new PaginationSupport(items, totalCount, pageSize, !k/Pv\j/R
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startIndex); !\,kZ|#>
return ps; ;XDz)`c
} +5&wOgx
}, true); ,57`D'
} K&U7H:
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public List findAllByCriteria(final =l0Jb#d
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DetachedCriteria detachedCriteria){ 2d {y M(=(
return(List) getHibernateTemplate sqS=qC
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().execute(new HibernateCallback(){ ~35U]s@v
publicObject doInHibernate /2HN>{F^Y
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(Session session)throws HibernateException { %T[^D&9$,
Criteria criteria = =Odv8yhn
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detachedCriteria.getExecutableCriteria(session); S>0nx ^P
return criteria.list(); ZZ.m(ATR
} D^-7JbE]
}, true); Kmdlf,[3d
} RJON90,J
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public int getCountByCriteria(final (
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DetachedCriteria detachedCriteria){ (} 5S
Integer count = (Integer) h#hxOVl%x
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getHibernateTemplate().execute(new HibernateCallback(){ I6s3+x;O
publicObject doInHibernate |/|
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(Session session)throws HibernateException { Y2[A2Uy$ef
Criteria criteria = ZDC9oX @
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detachedCriteria.getExecutableCriteria(session); >R2SQA o
return ad_`x
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criteria.setProjection(Projections.rowCount ]D!k&