Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 fmh]Y/UC
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 }J1#UH_E
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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 9L,T @#7
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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 3;AAC (X
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分页支持类: (#~063N,#
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java代码: R4?/7
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package com.javaeye.common.util; |yr}g-m
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import java.util.List; ET4YoH>
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publicclass PaginationSupport { wXe.zLQ
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publicfinalstaticint PAGESIZE = 30; WukD|BCC
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privateint pageSize = PAGESIZE; yd$y\pN=<
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privateList items; 0[^f9NZ>-
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privateint totalCount; &12.|
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privateint[] indexes = newint[0]; n=`UhC
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privateint startIndex = 0; RaR$lcG+iY
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public PaginationSupport(List items, int n,`&f~tap
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totalCount){ TWMD f
setPageSize(PAGESIZE); 9!tRM-
setTotalCount(totalCount); 8d-_'MXk3
setItems(items); c}QjKJ-c
setStartIndex(0); E$gcd#rT
} vb# d%1b5
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public PaginationSupport(List items, int ^XV$J-
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totalCount, int startIndex){ qvCl
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setPageSize(PAGESIZE); >k"/:g^t
setTotalCount(totalCount); R ~#\gMs
setItems(items); VK8 5A
setStartIndex(startIndex); (V*ggii@
} cJ&%XN
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public PaginationSupport(List items, int 1Nv_;p.{
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totalCount, int pageSize, int startIndex){ !9B)/Xi
setPageSize(pageSize); bX8Bn0#a+
setTotalCount(totalCount); BDpeAF8z
setItems(items); W,:*`
setStartIndex(startIndex); A#*0mJ8IK
} .7"
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publicList getItems(){ k? X7h2
return items; p "u5wJ_
} p3&w/K{L6w
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publicvoid setItems(List items){ J=ZNx;{6
this.items = items; IZ"d s=w
} %R(1^lFI$
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publicint getPageSize(){ x pT85D
return pageSize; 5\lOZYHX
} vzG(u_,9[
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publicvoid setPageSize(int pageSize){ j'g':U
this.pageSize = pageSize; "aHA6zTB
} $ba3dqbCW
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publicint getTotalCount(){ ^h1EE=E"
return totalCount; {dTtYL$'"
} k%Jv%m}aB
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publicvoid setTotalCount(int totalCount){ QE1DTU
if(totalCount > 0){ q3<Pb,Z
this.totalCount = totalCount; }j;*7x8(
int count = totalCount / MIGcV9hf
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pageSize; )OpB\k
if(totalCount % pageSize > 0) Us P1bh4
count++; 5ELKL#(
indexes = newint[count]; * EY^t=
for(int i = 0; i < count; i++){ ;H}XW=vO
indexes = pageSize * vau0Jn%=ck
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} KsZd.Rf=@
}else{ 4EQ-48h17
this.totalCount = 0; &]~Vft
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} 6HeZ<.d&
} 5F&xU$$a-
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publicint[] getIndexes(){ n o).70K
return indexes; 4'9yMXR
} ( CDwl,
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publicvoid setIndexes(int[] indexes){ 6_1v~#
this.indexes = indexes; `IN/1=]5
} anxZ|DE
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publicint getStartIndex(){ A"ApWJ3
return startIndex; ixJ%wnz
} a8$gXX-2
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publicvoid setStartIndex(int startIndex){ H&
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if(totalCount <= 0) vOMmsU F
this.startIndex = 0; ]m&cVy&
elseif(startIndex >= totalCount) N3 O~_=/v?
this.startIndex = indexes fZ8at
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[indexes.length - 1]; wX7|a/|@
elseif(startIndex < 0) \l$gcFXb
this.startIndex = 0; N i\*<:_
else{ #RIo63
this.startIndex = indexes gpt98:w:
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[startIndex / pageSize]; .~>Uh3S
} YTWlR]Tr6?
} D`|.%
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publicint getNextIndex(){ ? dD<KCbP,
int nextIndex = getStartIndex() + _DlkTi5(w
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pageSize; )+!~xL
if(nextIndex >= totalCount) N^u,C$zP9C
return getStartIndex(); ?uiQ'}
else 7soiy
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return nextIndex; $%*E)~
} ?$:;hGO.<~
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publicint getPreviousIndex(){ y:\ ^[y IQ
int previousIndex = getStartIndex() - -5v2E-
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pageSize; HkH!B.H]
if(previousIndex < 0) f(Hh(
return0; Woo2hg-ti
else m@qM|%(0x
return previousIndex; GoVB1)
} N;)Y+amg^
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} |(mr&7O
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抽象业务类 Mo4#UV
java代码: jQrj3b.NC3
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/** `vkNp8|
* Created on 2005-7-12 CA0SH{PdW&
*/ OK=lp4X
package com.javaeye.common.business; D/T&0
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import java.io.Serializable; FW?zJ
import java.util.List; }Pu|%\
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import org.hibernate.Criteria; QQQ3U
import org.hibernate.HibernateException; [# X:!xcl
import org.hibernate.Session; $~#N1
import org.hibernate.criterion.DetachedCriteria; 5IK -V)
import org.hibernate.criterion.Projections; aD2+9?m
import M"q]jeaM
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org.springframework.orm.hibernate3.HibernateCallback; xB&kxW.;
import ^H0`UKE
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org.springframework.orm.hibernate3.support.HibernateDaoS [1I>Bc&o*
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upport; e ]@Ex
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import com.javaeye.common.util.PaginationSupport; a$Lry?pb
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public abstract class AbstractManager extends .EOHkhn
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HibernateDaoSupport { qr5ME/)z
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privateboolean cacheQueries = false; c|f)k:Q
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privateString queryCacheRegion; .Yl*kG6r
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publicvoid setCacheQueries(boolean Tk9/1C{8
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cacheQueries){ 9*?H/iN@p?
this.cacheQueries = cacheQueries; @$5!
} |( %3'"Z
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publicvoid setQueryCacheRegion(String \M]w I
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queryCacheRegion){ &FQ]`g3_@
this.queryCacheRegion = yIS.'mK
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queryCacheRegion; S #M<d~rK
} 3@k;"pFa<
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publicvoid save(finalObject entity){ QOG
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getHibernateTemplate().save(entity); e`1,jt'
} /MS*_
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publicvoid persist(finalObject entity){ +vxU~WIV&
getHibernateTemplate().save(entity); u8Ul +u
} E6);\SJG}
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publicvoid update(finalObject entity){ 1goK>=-^
getHibernateTemplate().update(entity); *+p9u 1B5
} >+v)^7c
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publicvoid delete(finalObject entity){ {7`eR2#Wq
getHibernateTemplate().delete(entity); opz.kP[e,
} =1o_:VOG
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publicObject load(finalClass entity, a#X[V5|6Q
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finalSerializable id){ 'C6K\E
return getHibernateTemplate().load thk33ss:
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(entity, id); u1yc
} 5S'89 r3m
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publicObject get(finalClass entity, E<>Ev_5 >
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finalSerializable id){ WU-.lg'c'
return getHibernateTemplate().get Pms"YhyZ7
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(entity, id); I:s#,!>
} brN:Ypf-e
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publicList findAll(finalClass entity){ 3_(fisvx
return getHibernateTemplate().find("from 9)p VDS
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" + entity.getName()); |+//pGx
} jGM~(;iw6i
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publicList findByNamedQuery(finalString tk4~ 8
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namedQuery){ B 8z3W9
return getHibernateTemplate ;4of7d
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().findByNamedQuery(namedQuery); #_{3W-35*
} e!*d(lHKos
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publicList findByNamedQuery(finalString query, M xUj7ae
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finalObject parameter){ ']1j Mn
return getHibernateTemplate vBCQ-l<Ub
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().findByNamedQuery(query, parameter); uWR\#D'
} D`3m%O(?
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publicList findByNamedQuery(finalString query, ]O s!=rt
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finalObject[] parameters){ 6=2M[T
return getHibernateTemplate po+>83/!oq
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().findByNamedQuery(query, parameters); #
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} pZz?c/h-
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publicList find(finalString query){ &AH@|$!E
return getHibernateTemplate().find 6rMGlzuRo
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(query); r-'(_t~FT
} +=hiLfnE
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publicList find(finalString query, finalObject
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parameter){ g@hg u
return getHibernateTemplate().find XHcT7}]
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(query, parameter); ~{'.9
} oe,L&2Jz@
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public PaginationSupport findPageByCriteria B!H46w~
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(final DetachedCriteria detachedCriteria){ B P%>J^
return findPageByCriteria {0F\Y+
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); '0D2e
} c*$&MCh
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public PaginationSupport findPageByCriteria rr>*_67-:
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(final DetachedCriteria detachedCriteria, finalint /PF X1hSu
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startIndex){ B;?)
return findPageByCriteria S83wAr9T
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(detachedCriteria, PaginationSupport.PAGESIZE, H5uWI
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startIndex); DZKVZ_q
} 0<75G6wd
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public PaginationSupport findPageByCriteria LM}0QL
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(final DetachedCriteria detachedCriteria, finalint 91|=D
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pageSize, cLR02
finalint startIndex){ VE1 B"s</
return(PaginationSupport) j*aN_UTr3
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getHibernateTemplate().execute(new HibernateCallback(){ N)G.^9
publicObject doInHibernate hyv*+FV;
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(Session session)throws HibernateException { bv,_7UOG
Criteria criteria = i~:FlW]
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detachedCriteria.getExecutableCriteria(session); ]X/1u"
int totalCount = v]+,kbT
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((Integer) criteria.setProjection(Projections.rowCount N}Ozm6Mc
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()).uniqueResult()).intValue(); J'B6l#N
criteria.setProjection f!2`N
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(null); gn"_()8cT
List items = mwLp~z%OX
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criteria.setFirstResult(startIndex).setMaxResults 7RNf)nz
4Sv&iQ=vh
(pageSize).list(); mle"!*
PaginationSupport ps = \:ntqj&A|
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new PaginationSupport(items, totalCount, pageSize, 6-C9[[g<
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startIndex); `vWFTv
return ps; ~yz7/?A)TS
} &z;F'>"
}, true); RbUBKMZU
} }wzU<(Rx
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public List findAllByCriteria(final tj@IrwC^e"
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DetachedCriteria detachedCriteria){ 1MV\Jm
return(List) getHibernateTemplate o<2H~2/
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().execute(new HibernateCallback(){ GGHe{l
publicObject doInHibernate P_)h8-!+ $
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(Session session)throws HibernateException { Qe<DX"
Criteria criteria = }ybveZxv5A
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detachedCriteria.getExecutableCriteria(session); t.B%7e
return criteria.list(); HH/bBM!
} `Cy-*$$
}, true); 6u^MfOc
} r<4FF=
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public int getCountByCriteria(final X=]FVHV;
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DetachedCriteria detachedCriteria){ apQ` l^
Integer count = (Integer) mD`v>L
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getHibernateTemplate().execute(new HibernateCallback(){ tpp. 9
publicObject doInHibernate z$OKn#%T
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(Session session)throws HibernateException { !ckmNE0
Criteria criteria = Cw "Y=`
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detachedCriteria.getExecutableCriteria(session); Z>1\|j
return k@r%>Ul@
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criteria.setProjection(Projections.rowCount :^".cs?g
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()).uniqueResult(); h6c0BmS{1
} R5=2EwrGP
}, true); O^(ji8[l
return count.intValue(); Kp[ F@A#
} <RzGxhT
} n<47#-
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用户在web层构造查询条件detachedCriteria,和可选的 ()L[l@m
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 d$~q
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PaginationSupport的实例ps。 J+oK:tzt8
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ps.getItems()得到已分页好的结果集 m]t`;lr<
ps.getIndexes()得到分页索引的数组 4t3Y/X
ps.getTotalCount()得到总结果数 Nm;(M=
ps.getStartIndex()当前分页索引 ,CACQhrng
ps.getNextIndex()下一页索引 ^id9_RU
ps.getPreviousIndex()上一页索引 daamP$h9
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