Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 ^wD@)Dz
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 ebiOR1)sN
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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 RA*W Ys&xb
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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 X< 4f7;]O
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分页支持类: <_#a%+5d
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java代码: g|<$\}
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package com.javaeye.common.util; g]9A?#GyE
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import java.util.List; Gg3<
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publicclass PaginationSupport { @i(;}rx
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publicfinalstaticint PAGESIZE = 30; B`?5G\7L
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privateint pageSize = PAGESIZE; cm`x;[e6l
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privateList items; :|N(:W>=$Y
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privateint totalCount; 6XI$ o,{
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privateint[] indexes = newint[0]; C n.x:I@r
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privateint startIndex = 0; A;7At!kK
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public PaginationSupport(List items, int J'@`+veE
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totalCount){ gJ?Vk<hp
setPageSize(PAGESIZE); ?btZdnQ))S
setTotalCount(totalCount); {xCqz0
setItems(items); Qw.j
setStartIndex(0); 1Ts$kdO
} A x'o|RE)x
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public PaginationSupport(List items, int N.?)s.D(
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totalCount, int startIndex){ 18o5Gs;yx
setPageSize(PAGESIZE); _qsg2e}n
setTotalCount(totalCount); &nfGRb
setItems(items); oETl?Vt
setStartIndex(startIndex); {vU;(eN
} Gk]6WLi
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public PaginationSupport(List items, int { !NXu
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totalCount, int pageSize, int startIndex){ MT{ovDA].
setPageSize(pageSize); i]}`e>fF
setTotalCount(totalCount); rixt_}aE
setItems(items); ;CLOZ{
setStartIndex(startIndex); WO{ET
} Q[MWzsx
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publicList getItems(){ @y(<4kLz
return items; Mh8s @g
} %IK[d#HO
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publicvoid setItems(List items){ Qgxpq{y
this.items = items; -;j
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} ")D5ulb\
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publicint getPageSize(){ FS7@6I2Ts
return pageSize; @k3xk1*
} Zce/&
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publicvoid setPageSize(int pageSize){ 1`)e}p&
this.pageSize = pageSize; ?XB[awTD~
} zy'cf5k2
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publicint getTotalCount(){ m*~Iu<5L
return totalCount; Eh&-b6:
} v`Yj)
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publicvoid setTotalCount(int totalCount){ fzZ`O{$8
if(totalCount > 0){ 8C8,Q\WV(~
this.totalCount = totalCount; Y>Fh<"A|$
int count = totalCount / 1fqJtP6
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pageSize; kV:T2}]|H
if(totalCount % pageSize > 0) a~&euT2
count++; v /x~L$[
indexes = newint[count]; <g1=jG:7k
for(int i = 0; i < count; i++){ /Suh&qw>
indexes = pageSize * k nljc^
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} Sy"!Q%+|
}else{ |syvtS{
this.totalCount = 0; q!AcMd\
} Cq[<CPAS
} Zmz $
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publicint[] getIndexes(){ cf,^7,-`"
return indexes; c]68$;Z7
}
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publicvoid setIndexes(int[] indexes){ S`pB EM
this.indexes = indexes; T\w{&3ONm
} /a}`
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publicint getStartIndex(){ W~j>&PK,?
return startIndex; Igh=Z %
} `J%35
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publicvoid setStartIndex(int startIndex){ Wo{4*~f
if(totalCount <= 0) }U@(S>,%
this.startIndex = 0; /kAbGjp0
elseif(startIndex >= totalCount) <Yn-sH
this.startIndex = indexes H1r8n$h
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[indexes.length - 1]; !md1~g$rN
elseif(startIndex < 0) sp6A*mwl
this.startIndex = 0; I ;F\'P)e
else{ )yUSuK(Vu
this.startIndex = indexes La$?/\Dv)
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[startIndex / pageSize]; /_r` A
} ny1Dg$ui2
} cnB:bQQK8
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publicint getNextIndex(){ 4o<'
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int nextIndex = getStartIndex() + auAwZi/
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pageSize; H`
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if(nextIndex >= totalCount) m8Rt>DY
return getStartIndex(); d "25e"(~F
else t:YMF$Z
return nextIndex; %7
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} V^< Zs//7
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publicint getPreviousIndex(){ 0~BZh%s< (
int previousIndex = getStartIndex() - T@d4NF#
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pageSize; {Rq5=/b
if(previousIndex < 0) ?@QcKQ@
return0; iN1_T
else krRnE7\m
return previousIndex; WNSEc%
} mXI'=Vo!S
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} B#4'3Y-3
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抽象业务类 Esf\Bo"
java代码: aX?
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/** @[bFlqsE
* Created on 2005-7-12 ohi0_mBz
*/ c9Q _Qr0'
package com.javaeye.common.business; {Gw{W&<
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import java.io.Serializable; cC9haxW
import java.util.List; `:W }yo<F
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import org.hibernate.Criteria; $Y8iT<nP
import org.hibernate.HibernateException; ,%U\@*6=
import org.hibernate.Session; ~R~eQ=8
import org.hibernate.criterion.DetachedCriteria; Z9j`<VgN
import org.hibernate.criterion.Projections; ~-'-<-
import lD$\t/8B
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org.springframework.orm.hibernate3.HibernateCallback; vJe c+a
import 4c<\_\\ck
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org.springframework.orm.hibernate3.support.HibernateDaoS u56F;y
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upport; B^/(wHBp
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import com.javaeye.common.util.PaginationSupport; b{;LbHq+G
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public abstract class AbstractManager extends 7{38g
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HibernateDaoSupport { DuIgFp
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privateboolean cacheQueries = false; 5m\)82s
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privateString queryCacheRegion; {FR+a**
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publicvoid setCacheQueries(boolean ~Xc1y!"9*
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cacheQueries){ +1c[!;'
this.cacheQueries = cacheQueries; @{ L|&Mk!
} MHS|gR.c
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publicvoid setQueryCacheRegion(String BwVq:)P/R
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queryCacheRegion){ #4V->I
this.queryCacheRegion = @]L$eOV_
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queryCacheRegion; Gn;^]8d
} ;rl61d}NH#
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publicvoid save(finalObject entity){ ,My'_"S?
getHibernateTemplate().save(entity); ?8)k6:
} F<{k~
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publicvoid persist(finalObject entity){ %
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getHibernateTemplate().save(entity); ES)_X:\X?V
} 4wx{i6
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publicvoid update(finalObject entity){
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getHibernateTemplate().update(entity); +9M";'\c
} EmyE%$*T
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publicvoid delete(finalObject entity){ 31N5dIi,
getHibernateTemplate().delete(entity); >^g\s]c[
} cDz^jC
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publicObject load(finalClass entity, &&C'\,ZK5
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finalSerializable id){ iKv"200h(
return getHibernateTemplate().load -X-sykDm
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(entity, id); z~/e\
} Dy{lgT 0k
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publicObject get(finalClass entity, n^<J@uC
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finalSerializable id){ uW4.Q_O!H
return getHibernateTemplate().get ?>My&yB
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(entity, id); Kp19dp}'b
} P!lfk:M^;
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publicList findAll(finalClass entity){ GQ sE5Vb
return getHibernateTemplate().find("from *DQa6,b
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" + entity.getName()); r-a0XNS*
} s%G%s,d
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publicList findByNamedQuery(finalString QkYKm<b
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namedQuery){ At&kW3(
return getHibernateTemplate cI-@nV
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().findByNamedQuery(namedQuery); yTf/]H]d
} B &3sV+
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publicList findByNamedQuery(finalString query, q``/7
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finalObject parameter){ ,o}CBB! k
return getHibernateTemplate dV
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().findByNamedQuery(query, parameter); WT}xCni
} <`NtTG
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publicList findByNamedQuery(finalString query, 9U3 .=J
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finalObject[] parameters){ Bq,MTzxD
return getHibernateTemplate O^_CqT%
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().findByNamedQuery(query, parameters); +^%)QH>9
} qRq4PQ@
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publicList find(finalString query){ g'2}Y5m$`
return getHibernateTemplate().find B7sBO6Z$J
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(query); 8Nx fYA
} 6XnUs1O
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publicList find(finalString query, finalObject X.ZG-TC
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parameter){ ?QtM|e
return getHibernateTemplate().find :d~mlyFI6P
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(query, parameter); n*TKzn4E
} l-5O5|C
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public PaginationSupport findPageByCriteria *%%n9T
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(final DetachedCriteria detachedCriteria){ z? GtC{L9
return findPageByCriteria <SdOb#2
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); U
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} {mLv?"M]
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public PaginationSupport findPageByCriteria =FMrVE
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(final DetachedCriteria detachedCriteria, finalint 3TN'1D ei
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startIndex){ e}s,WC2-
return findPageByCriteria ^;$9>yi1
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(detachedCriteria, PaginationSupport.PAGESIZE, [q^pMH#U"
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startIndex); Y5*A,piq
} "&\(:#L
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public PaginationSupport findPageByCriteria ^c"\%!w"O
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(final DetachedCriteria detachedCriteria, finalint wkp$/IZKMj
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pageSize, Y 2^y73&k
finalint startIndex){ kjr q;j:
return(PaginationSupport) swMR+F#u*
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getHibernateTemplate().execute(new HibernateCallback(){ |=W>4>
publicObject doInHibernate G#='*vOtO
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(Session session)throws HibernateException { 5oOs.(m|*C
Criteria criteria = l a_
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detachedCriteria.getExecutableCriteria(session); .:(gg
int totalCount = <!X]$kvG
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((Integer) criteria.setProjection(Projections.rowCount 9~ifST\
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()).uniqueResult()).intValue(); f%REN3=5K
criteria.setProjection rWBgYh
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(null); qLB(Th\&'
List items = 4Cvo^k/I
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criteria.setFirstResult(startIndex).setMaxResults RC!T1o~L
L)Da1<O
(pageSize).list(); sZokiFJ
PaginationSupport ps = [VouG{
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new PaginationSupport(items, totalCount, pageSize, J^Wqa$<;"
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startIndex); "azrcC
return ps; |^GN<