Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 2x t
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 l+RBe<Mq
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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 p'!cGJL
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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 #5=Yg5
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分页支持类: e![n$/E3R
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java代码: (xy/:i".V
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package com.javaeye.common.util; iJT_*,P^
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import java.util.List; x} {/) ?vC
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publicclass PaginationSupport { !T!U@e=u
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publicfinalstaticint PAGESIZE = 30; JN,4#,
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privateint pageSize = PAGESIZE; }CIH1q3P
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privateList items; Q9Sh2qF^2
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privateint totalCount; &
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privateint[] indexes = newint[0]; B<%cqz@
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privateint startIndex = 0; HRn
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public PaginationSupport(List items, int Jz<-B
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totalCount){ 71b0MHNkvv
setPageSize(PAGESIZE); KTtB!4by
setTotalCount(totalCount); Zaime
setItems(items); 7qsu0 .[d
setStartIndex(0); OEiu,Y|@l
} .bYZkO:oy
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public PaginationSupport(List items, int HKp|I%b]J
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totalCount, int startIndex){ ^#( B4l!
setPageSize(PAGESIZE); }Wlm#t
setTotalCount(totalCount); 1aAY7Dm_&
setItems(items); 76::X:76
setStartIndex(startIndex); WwUhwY1o!L
} $Z|HFV{
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public PaginationSupport(List items, int \<ko)I#%
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totalCount, int pageSize, int startIndex){ `uP:UQ9S
setPageSize(pageSize); S2i*Li
setTotalCount(totalCount); {'8td^JEE
setItems(items); &zR\Rmpt
setStartIndex(startIndex); HOaNhJ{7D
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publicList getItems(){ %?`O
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return items; %g_)_ ~
} %1oB!+tv
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publicvoid setItems(List items){ ,B~5;/|
this.items = items; ,xw1B-dx
} QArph0e
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publicint getPageSize(){ aPdEEqc\l
return pageSize; UY6aD~tD0
} C:AD ZJL
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publicvoid setPageSize(int pageSize){ 38 ]}+Bb
this.pageSize = pageSize; g#k@R'7E
} ^Gi7th,
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publicint getTotalCount(){ z]2MR2W@X
return totalCount; })+iAxR
} 0tz? sN
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publicvoid setTotalCount(int totalCount){ (%c&Km7K
if(totalCount > 0){ AGl#f\_^
this.totalCount = totalCount; *knN?`(x
int count = totalCount / {,!!jeOO
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pageSize; L+mE&
if(totalCount % pageSize > 0) u6 QW*8b4
count++; S{RRlR6Z
indexes = newint[count]; O{7rIy
for(int i = 0; i < count; i++){ w&@zJ [
indexes = pageSize * k8\KCKql
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} w~_ycY.e
}else{ *LMzq9n3o
this.totalCount = 0; qnHjw Mi
} w/^_w5
} ^*YoNd_kpN
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publicint[] getIndexes(){ ] g<$f#S
return indexes; !?R#e`}
} KWxTN|>
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publicvoid setIndexes(int[] indexes){ rb}fP
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this.indexes = indexes;
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} k( Ik+=u
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publicint getStartIndex(){ eIy:5/s
return startIndex; ck%.D%=
} E7i/gY
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publicvoid setStartIndex(int startIndex){ w2!:>8o:
if(totalCount <= 0) G)^/#d#&
this.startIndex = 0; !vSq?!y6*P
elseif(startIndex >= totalCount) !Pz#czo
this.startIndex = indexes :{^~&jgL
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[indexes.length - 1]; R>Dr1fc}
elseif(startIndex < 0) w >%^pO~}`
this.startIndex = 0; P3YM4&6XA
else{ 4%zy$,|e
this.startIndex = indexes
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[startIndex / pageSize]; FZ RnIg
} 5~Ek_B
} WO{7/h</
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publicint getNextIndex(){ wx`.
int nextIndex = getStartIndex() + wfe4b
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pageSize; !Yr9N4
if(nextIndex >= totalCount) mn=b&{')e
return getStartIndex(); 2z"<m2a
else
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return nextIndex; [3qH?2&
} livKiX`
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publicint getPreviousIndex(){ ,C"6@/:l
int previousIndex = getStartIndex() - B6;>V`!
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pageSize; CshME\/
if(previousIndex < 0) ]" e'z
return0; SPRTJdaC9
else uYWgNNxdmo
return previousIndex; rNJU &
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} RM,aG}6M)M
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} gE$Uv*Gj
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抽象业务类 F .Zk};lb
java代码: szhSI
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/** [e
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* Created on 2005-7-12 i!8"T#
*/ VD@$y^!H
package com.javaeye.common.business; 0>BI[x@
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import java.io.Serializable; *xpn-hCp<
import java.util.List; 6nE/8m
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import org.hibernate.Criteria; )D#} /3s
import org.hibernate.HibernateException; 0Fon`3(^\
import org.hibernate.Session; c1i:m'b_5
import org.hibernate.criterion.DetachedCriteria; H"^9g3U
import org.hibernate.criterion.Projections; ;`Xm?N
import :<B_V<
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org.springframework.orm.hibernate3.HibernateCallback; M^8zqAA
import |>xuH#Q
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org.springframework.orm.hibernate3.support.HibernateDaoS x:~XZX\mwH
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upport; #oa>Z.?_V
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import com.javaeye.common.util.PaginationSupport; pO7OP"q1
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public abstract class AbstractManager extends &dWGa+e
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HibernateDaoSupport { ;Wy03}K4J
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privateboolean cacheQueries = false; \W TKw x
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privateString queryCacheRegion; MG.c`t/w
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publicvoid setCacheQueries(boolean WHv6E!^\_
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cacheQueries){ 6pS}\aD
this.cacheQueries = cacheQueries; L>1y[
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} v@GhwL
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publicvoid setQueryCacheRegion(String Y7g%nz[[
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queryCacheRegion){ ?yjg\S?L
this.queryCacheRegion = e4Qjx*[G
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queryCacheRegion; BH~zeJ*Pr
} GXD<X_[
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publicvoid save(finalObject entity){ "\}h
getHibernateTemplate().save(entity); 9Xa.%vw>
} _oG%bNM
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publicvoid persist(finalObject entity){ s#a`e]#?
getHibernateTemplate().save(entity); ic!% } S?
} XgnNYy6W
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publicvoid update(finalObject entity){ 6QT&{|q=
getHibernateTemplate().update(entity); zGz}.-F
} wy:Gy9\
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publicvoid delete(finalObject entity){ 2BF455e
getHibernateTemplate().delete(entity); k=9+"4:
} S},Cz
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publicObject load(finalClass entity,
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finalSerializable id){ =$y J66e
return getHibernateTemplate().load (=WYi~2v
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(entity, id); w{L9-o3A
} ~&ns?z>x
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publicObject get(finalClass entity, j8 2w
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finalSerializable id){ "PN4{"`V
return getHibernateTemplate().get E`qX|n
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(entity, id); .nVY" C&
} C|IHRw`[
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publicList findAll(finalClass entity){ >iK LC
return getHibernateTemplate().find("from ~Yl.(R
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" + entity.getName()); EJ<L,QH3
} {2T u_2>
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publicList findByNamedQuery(finalString 9-_Lc<
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namedQuery){ -!5l4
return getHibernateTemplate nr&|
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().findByNamedQuery(namedQuery); PcZ<JJ16F$
} F,VWi$Po\N
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publicList findByNamedQuery(finalString query, D'ZUbAh!
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finalObject parameter){ %1#|>^
return getHibernateTemplate $'d,X@}8
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().findByNamedQuery(query, parameter); )Kl@dj
} nwfu@h0G
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publicList findByNamedQuery(finalString query, {0fQE@5@
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finalObject[] parameters){ =Xid"$
return getHibernateTemplate |=VWE>g
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().findByNamedQuery(query, parameters); izl-GitP
} y,jpd#Y
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publicList find(finalString query){ %1GKN|7
return getHibernateTemplate().find pON#r
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(query); %$)Sz[=
} lF46W
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publicList find(finalString query, finalObject ZRwN #?x
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parameter){ &jg>X+;
return getHibernateTemplate().find 4y5Q5)j
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(query, parameter); h?4EVOx+
} g.;2N 9
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public PaginationSupport findPageByCriteria xi,fm
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(final DetachedCriteria detachedCriteria){ `)w=@9B)"
return findPageByCriteria #1}%=nAsi
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); ;<0~^,Xm
} ZtGkMd$
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public PaginationSupport findPageByCriteria 4 s9^%K\8{
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(final DetachedCriteria detachedCriteria, finalint rt)[}+ox
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startIndex){ |vG?H#y
return findPageByCriteria _|MK0'+f
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(detachedCriteria, PaginationSupport.PAGESIZE, hQL@q7tUr
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startIndex); C4dCaiX
} =&.9z 4A
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public PaginationSupport findPageByCriteria .ubZ
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(final DetachedCriteria detachedCriteria, finalint RR/?"d?&
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pageSize, XA69t2J~F
finalint startIndex){ =XSupM[T
return(PaginationSupport) (v}l#M7w
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getHibernateTemplate().execute(new HibernateCallback(){ E(*CEW.V*
publicObject doInHibernate :2A-;P4
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(Session session)throws HibernateException { Z)u_2e
Criteria criteria = {p(6bsn_#]
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detachedCriteria.getExecutableCriteria(session); ?xQm_
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int totalCount = bNvc@oo
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((Integer) criteria.setProjection(Projections.rowCount \x8'K
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()).uniqueResult()).intValue(); n2'XWbMaL
criteria.setProjection cj#.Oaeq*
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(null); #%z@yg
List items = %~lTQCPE
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criteria.setFirstResult(startIndex).setMaxResults G{a_\'7
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(pageSize).list(); PnI_W84z
PaginationSupport ps = `Q>qmf_Fi
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new PaginationSupport(items, totalCount, pageSize, j#H&~f
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startIndex); `n`HwDo;i
return ps; `cRRdD:dA
} OuPfB
}, true); VY!A]S"
} ;T>.
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public List findAllByCriteria(final Z,,q mwd
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DetachedCriteria detachedCriteria){ 0y;1Dk!
return(List) getHibernateTemplate vC^n_
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().execute(new HibernateCallback(){ +3R/g@n
publicObject doInHibernate 9*[!ux7h
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(Session session)throws HibernateException { )u=a+T
Criteria criteria = Uee$5a>(
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detachedCriteria.getExecutableCriteria(session); L5]uT`Twa
return criteria.list(); 6k ]+DbT
} RJD(c#r$
}, true); DC'L-]#<