Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 ^ ]SU (kY
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 86~q pN
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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 8-q4'@(
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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 @BqSu|'Du,
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分页支持类: 8z*/J=n
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java代码: &(A'uX.>pr
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package com.javaeye.common.util; 3NgyF[c
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import java.util.List; 6g'+1%O
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publicclass PaginationSupport { d7v_>
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publicfinalstaticint PAGESIZE = 30; vkW]?::Cfd
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privateint pageSize = PAGESIZE; hi9@U]H#
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privateList items; R TeG\U
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privateint totalCount; 9C\@10 D
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privateint[] indexes = newint[0]; KgEfhO$W
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privateint startIndex = 0; X8(WsN
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public PaginationSupport(List items, int f=nVK4DuZ
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totalCount){ G0v<`/|>}
setPageSize(PAGESIZE); go5l<:9
setTotalCount(totalCount); BY??X=
setItems(items); 9d&}CZr
setStartIndex(0); j'|`:^
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} rfhvd wwD
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public PaginationSupport(List items, int <k-hRs2d
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totalCount, int startIndex){ >A1;!kGE#
setPageSize(PAGESIZE); |BA<> WE
setTotalCount(totalCount); >y
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setItems(items); kB;!EuL
setStartIndex(startIndex);
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public PaginationSupport(List items, int )n1 7}Qm`V
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totalCount, int pageSize, int startIndex){ C/A~r
setPageSize(pageSize); ah0
setTotalCount(totalCount); "QCVi R
setItems(items); w}``2djR'W
setStartIndex(startIndex); %B-m- =gz
}
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publicList getItems(){ </Ry4x^A
return items; g(F? qP_K
} i{6wns?KMj
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publicvoid setItems(List items){ ~QE- $;
this.items = items; :*s+X$x,<
} ob"yz }
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publicint getPageSize(){ D``>1IA]
return pageSize; 5 _
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} j-wz7B
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publicvoid setPageSize(int pageSize){ -XARew
this.pageSize = pageSize; PU^@BZ_m
} P(Ve'
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publicint getTotalCount(){ n ^_B0Rkv
return totalCount; Z^yhSbE{5
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publicvoid setTotalCount(int totalCount){ /V)4B4
if(totalCount > 0){ -[.A6W
this.totalCount = totalCount; \t@4)+s/)
int count = totalCount / dNgjM
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pageSize; :Y2J7p[+
if(totalCount % pageSize > 0) sn.&|)?Fi
count++; L64cCP*
indexes = newint[count]; Ve^rzGU
for(int i = 0; i < count; i++){ c9)5G+
indexes = pageSize * lM-*{<B
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} D!CuE7}
}else{ 1rQKHC:|
this.totalCount = 0; S K7b]J>
} 'or8CGr^p
} !`EhVV8u-_
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publicint[] getIndexes(){ <<.%Gk
return indexes; \cRe,(?O
} gTjhD(
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publicvoid setIndexes(int[] indexes){ ,7nA:0P
this.indexes = indexes; Vm
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publicint getStartIndex(){ o:"^@3
return startIndex; k=):>}
} }g|)+V\A
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publicvoid setStartIndex(int startIndex){ p7kH"j{xD
if(totalCount <= 0) u }~%9Pi
this.startIndex = 0; +qzCy/_gd
elseif(startIndex >= totalCount) Yl$Cj>FG
this.startIndex = indexes Du."O]syD
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[indexes.length - 1]; V_-{TGKX
elseif(startIndex < 0) $(U}#[Vie
this.startIndex = 0; 7f\@3r
else{ rc9Y:(S1l
this.startIndex = indexes #cD20t
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[startIndex / pageSize]; 9 ?~Y
} iu(+
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} #J<IHNRt
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publicint getNextIndex(){ 0x/3Xz
int nextIndex = getStartIndex() + zr5(nAl
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pageSize; bxA1fA;
if(nextIndex >= totalCount) @Xb>GPVe#L
return getStartIndex(); q=40l
else 1-bQ
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return nextIndex; n%YG)5;
} 1_z6O!rx
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publicint getPreviousIndex(){ 5};$>47m
int previousIndex = getStartIndex() - .A2u7*h&
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pageSize; 3 @7<e~f
if(previousIndex < 0) g2'Q)w
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else HAr_z@#E
return previousIndex; }.R].4gT
} <7%4=
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抽象业务类 )"o+wSI1
java代码: ^3:DeZf!u
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/** 4fCg{
* Created on 2005-7-12 -=A W. Zo
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package com.javaeye.common.business; a|v}L,
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import java.io.Serializable; K9J"Q4pEC
import java.util.List; fx783
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import org.hibernate.Criteria; V^U1o[`
import org.hibernate.HibernateException; i!=28|_
import org.hibernate.Session; ^QKL}xiV:
import org.hibernate.criterion.DetachedCriteria; Dxwv\+7]
import org.hibernate.criterion.Projections; 0y3<Ho,+$
import !tNJLOYf
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org.springframework.orm.hibernate3.HibernateCallback; %$l^C!qcY
import -Jtx9P
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org.springframework.orm.hibernate3.support.HibernateDaoS l^IPN'O@
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upport; #!FLX*,
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import com.javaeye.common.util.PaginationSupport; l?/.uNw
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public abstract class AbstractManager extends %ycCNS
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HibernateDaoSupport { yeCR{{B/'
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privateboolean cacheQueries = false; y ;4h'y>#
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privateString queryCacheRegion; ($oO,
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publicvoid setCacheQueries(boolean Uq,M\V\
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cacheQueries){ <}E^r_NvD
this.cacheQueries = cacheQueries; IFX|"3[$
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publicvoid setQueryCacheRegion(String x\Y%/C[Kc
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queryCacheRegion){ $J |oVVct
this.queryCacheRegion = Dk'EKT-
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queryCacheRegion; Ohm>^N;
} >q&Q4E0
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publicvoid save(finalObject entity){ ZHshg`I`
getHibernateTemplate().save(entity); Te8BFcJG
} id-VoHdK
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publicvoid persist(finalObject entity){ LaZF=<w(
getHibernateTemplate().save(entity); {}3kla{
} /)i)wxi
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publicvoid update(finalObject entity){ {I|k@
getHibernateTemplate().update(entity); 8i;N|:WdH
} v}IP%84
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publicvoid delete(finalObject entity){ ;UgRm#
getHibernateTemplate().delete(entity); L-d8bA
} c=2e?
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publicObject load(finalClass entity, L!L/QG|wdf
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finalSerializable id){ wS2iyrIB
return getHibernateTemplate().load >:]fN61#
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(entity, id); K]bS:[34 R
} 3D~Fu8Hg1
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publicObject get(finalClass entity, B-[SUmHr
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finalSerializable id){ Q;P ~'
return getHibernateTemplate().get &,Q{l$`X
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(entity, id); R7KQ-+Zb
} 2H<?
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publicList findAll(finalClass entity){ b,a\`%m}
return getHibernateTemplate().find("from ^+[o+
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} 4Uf+t?U9
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publicList findByNamedQuery(finalString v%<_Mh
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namedQuery){ s/[i>`g/9
return getHibernateTemplate ud:?~?j&w
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().findByNamedQuery(namedQuery); ^TWN_(-@
} ~rCnST
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publicList findByNamedQuery(finalString query, <J-OwO a-1
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finalObject parameter){ )O- x1U
return getHibernateTemplate %FFw!eVi
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().findByNamedQuery(query, parameter); ~+7yi4(i
} g}^/8rW
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publicList findByNamedQuery(finalString query, [/uKo13
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finalObject[] parameters){ ,H[AC}z2X
return getHibernateTemplate 0D#!!r ;
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().findByNamedQuery(query, parameters); s*CKFEb#
} )+t5G>yKK
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publicList find(finalString query){ !P Gow
return getHibernateTemplate().find H5RHA^p|
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(query); SbnVU[
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publicList find(finalString query, finalObject _z4rx
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parameter){ )Elr8XLw
return getHibernateTemplate().find 9jPb-I-
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(query, parameter); {t/!a0\HS
} <M'IRf/D
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public PaginationSupport findPageByCriteria g[M@
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(final DetachedCriteria detachedCriteria){ NuO>zAu
return findPageByCriteria <uTsXv
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); Ee|+uQ981>
} 3sZK[Y|ax
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public PaginationSupport findPageByCriteria _&%!4n#>
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(final DetachedCriteria detachedCriteria, finalint sId5pY!
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startIndex){ C]=E$^|{
return findPageByCriteria <dYk|5AdLF
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(detachedCriteria, PaginationSupport.PAGESIZE, 5N/]/
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startIndex); E+1j3Q;
} "tj#P
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public PaginationSupport findPageByCriteria !F<?h e<U
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(final DetachedCriteria detachedCriteria, finalint =h_gj >
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pageSize, zBs7]z!eP
finalint startIndex){ W"-nzdAJ5
return(PaginationSupport)
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getHibernateTemplate().execute(new HibernateCallback(){ ?@#}%<yEq
publicObject doInHibernate Ys_YjlMIbl
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(Session session)throws HibernateException { &"kx(B
Criteria criteria = 0 j.Sb2
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detachedCriteria.getExecutableCriteria(session); ,){0y%c#y
int totalCount = $Tur"_`I;
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((Integer) criteria.setProjection(Projections.rowCount |"-,C}O
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()).uniqueResult()).intValue(); Q]7Q
criteria.setProjection 2DC#PX)i
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(null); .~U9*5d
List items = l46F3C|
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criteria.setFirstResult(startIndex).setMaxResults ;?o C=c
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(pageSize).list(); Ii,:+o%
PaginationSupport ps = p_AV3
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new PaginationSupport(items, totalCount, pageSize, aOD"z7}U
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startIndex); ``<1Lo@
return ps; ^"l$p,P+
} 5VTbW
}, true); []]3"n
} @
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public List findAllByCriteria(final E nvs[YZe
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DetachedCriteria detachedCriteria){ Fq9[:
return(List) getHibernateTemplate 9vbh5xX
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().execute(new HibernateCallback(){ Xdq,
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publicObject doInHibernate >" .qFn g
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(Session session)throws HibernateException { :z\f.+MI
Criteria criteria = bevT`D
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detachedCriteria.getExecutableCriteria(session); Vw*x3>`
return criteria.list(); SHk[X ]Uo
} +Y~+o-_
}, true); W =zG
} g=C<E2'i*
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public int getCountByCriteria(final yx2.7h3
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DetachedCriteria detachedCriteria){ v/czW\z
Integer count = (Integer) [KH?5C
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getHibernateTemplate().execute(new HibernateCallback(){ zFtGc
publicObject doInHibernate upDQNG>d
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(Session session)throws HibernateException { 1955(:I
Criteria criteria = 1,j9(m2
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detachedCriteria.getExecutableCriteria(session); ^PQV3\N
return <yS"c5D6
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criteria.setProjection(Projections.rowCount m=MT`-:
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()).uniqueResult(); \Wc/kY3&
} >y9o&D