Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 qzHU)Ns(_
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 ?#i|>MRR>
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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 GqMB^Ad
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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 c l9$g7
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分页支持类: St_Sl:m$
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java代码: SNN#$8\
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package com.javaeye.common.util; :k\}Ik
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import java.util.List; Wy!uRzbBv
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publicclass PaginationSupport { $q^O%(
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publicfinalstaticint PAGESIZE = 30; >I|<^$/
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privateint pageSize = PAGESIZE; `LqnEutzc
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privateList items; q{[1fE"[K4
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privateint totalCount; Y1|^>C#a
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privateint[] indexes = newint[0]; +<z7ds{Z
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privateint startIndex = 0; }&C dsCM>2
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public PaginationSupport(List items, int ";o~&8?)
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totalCount){ mqubXS;J|P
setPageSize(PAGESIZE); s* @QT8%
setTotalCount(totalCount); aE}=^%D
setItems(items); UC.8DaIPN
setStartIndex(0); tD865gi
} x4@MO|C
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public PaginationSupport(List items, int f]hBPkZ6
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totalCount, int startIndex){ C"k2<IE
setPageSize(PAGESIZE); ,#=eu85'
setTotalCount(totalCount); U-ERhm>uk
setItems(items);
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setStartIndex(startIndex); L(W%~UGN
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} `Yg7,{A\J
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public PaginationSupport(List items, int .V7Y2!4TE
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totalCount, int pageSize, int startIndex){ _xa}B,H
setPageSize(pageSize); =CWc`
setTotalCount(totalCount); XC
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setItems(items); K3j_C`Se
setStartIndex(startIndex); /5&3WG&<u
} ?0? x+
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publicList getItems(){ MiRibHXI,
return items; ,G/\@x%
} MX"A@p~H
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publicvoid setItems(List items){ tq2-.]Y@U
this.items = items; s@/B*r9
} c(QG4.)m
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publicint getPageSize(){ 'm
return pageSize; 4x=V|"
} EI[e+@J
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publicvoid setPageSize(int pageSize){ +s#S{b
this.pageSize = pageSize; em f0sL
} EGp~Vo-
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publicint getTotalCount(){ Oex{:dO "F
return totalCount; sURUQ H
} vo:52tCk}m
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publicvoid setTotalCount(int totalCount){ ,-w-su=J_
if(totalCount > 0){ 2+c>O%L
this.totalCount = totalCount; *+_fP |cv
int count = totalCount / ujI 3tsl
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pageSize; .WN;TjEg!
if(totalCount % pageSize > 0) 1puEP*P
count++; 9}K(Q=
indexes = newint[count]; -D.BJ(
for(int i = 0; i < count; i++){ f;@b
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indexes = pageSize * /K2.V@T
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} UUdu;3E=5
}else{ ~:P8g<w
this.totalCount = 0; a}[=_vb}K
} 4)x3!Ol
} ?{ 8sT-Z-L
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publicint[] getIndexes(){ Lz#$_Am'H
return indexes; zm;*:]S
} U5@TaGbx
} K+Q9<~u
publicvoid setIndexes(int[] indexes){ :FKYYH\
this.indexes = indexes; H3UX{|[
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publicint getStartIndex(){ ,J`lr
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return startIndex; 6N)<
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} Nj3^"}V
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publicvoid setStartIndex(int startIndex){ ZF/J/;uI
if(totalCount <= 0) Z;"4$@|qE
this.startIndex = 0; (DELxE
elseif(startIndex >= totalCount) @^XkU(m
this.startIndex = indexes Ht=6P)
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[indexes.length - 1]; Je4.9?Ch
elseif(startIndex < 0) 1O'* X
this.startIndex = 0; ]"2 v7)e
else{ >H=Q$gI
this.startIndex = indexes Z)6nu)
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[startIndex / pageSize]; 1K*f4BnDr~
} ?-.Ep0/
} w ;s ]n
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publicint getNextIndex(){ vhE}{ED
int nextIndex = getStartIndex() + ==e#CSJq
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pageSize; "[".3V
if(nextIndex >= totalCount) J?n)FgxS
return getStartIndex(); eN2k8=
else )kY_"= d
return nextIndex; dPyBY]`
} W:+2We @
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publicint getPreviousIndex(){ 13>3R+o
int previousIndex = getStartIndex() - ^b|Nw:
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pageSize; @cTZ`bg
if(previousIndex < 0) Edn$0D68u_
return0; GHgEbiY:
else n%MYX'0
return previousIndex; EfrkB"
} M;vlQ"Yl'
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} {GH`V}Ob
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抽象业务类 J!K/7uS
java代码: }^Ua
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/** kO`3ENN
* Created on 2005-7-12 84oW
*/ b\|p
package com.javaeye.common.business; hZ\W ?r
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import java.io.Serializable; 8hdAXWPn
import java.util.List; g7}z
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import org.hibernate.Criteria; [TfV2j* e
import org.hibernate.HibernateException; vhquHy.qi#
import org.hibernate.Session; A7,$y!D
import org.hibernate.criterion.DetachedCriteria; +_XbHjhN/
import org.hibernate.criterion.Projections; F6GZZKj
import +D-+}&oW
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org.springframework.orm.hibernate3.HibernateCallback; DEwtP
import UG?C=Tf
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org.springframework.orm.hibernate3.support.HibernateDaoS VU0tyj$
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upport; r5qx! >
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import com.javaeye.common.util.PaginationSupport; ONe!'a0
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public abstract class AbstractManager extends Gx* 0$4xJ3
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HibernateDaoSupport { llG#nDe
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privateboolean cacheQueries = false; v0MOX>`s
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privateString queryCacheRegion; }:D~yEP
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publicvoid setCacheQueries(boolean rn5g+%jX*
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cacheQueries){ ?N?pe}
this.cacheQueries = cacheQueries; KJJb^6P48W
} &?Z)V-1H
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publicvoid setQueryCacheRegion(String m^x\@!N:(
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queryCacheRegion){ u`Qcw|R+
this.queryCacheRegion = t7+Ic
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queryCacheRegion; yGG\[I;7
} 3a)Q:#okD
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publicvoid save(finalObject entity){ wJR i;fvi
getHibernateTemplate().save(entity); n@,eZ!
} 0t[mhmSU,
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publicvoid persist(finalObject entity){ 4-rI4A<
getHibernateTemplate().save(entity); 7Z~szD
} f=O>\
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publicvoid update(finalObject entity){ PZg]zz=V4
getHibernateTemplate().update(entity); `"":
} j~f 7WJ
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publicvoid delete(finalObject entity){ L=wFo^N
getHibernateTemplate().delete(entity); "v(]"L
} ];~[Olc
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publicObject load(finalClass entity, &Wz:-G7<n
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finalSerializable id){ NWwtq&pz2
return getHibernateTemplate().load '"\Mjz)/
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(entity, id); 7:q-NzE\6
} \0T*msYQ
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publicObject get(finalClass entity,
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finalSerializable id){ |8{iIvi/
return getHibernateTemplate().get s:F+bG}|
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(entity, id); j=% -b]
} a(T4WDl^
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publicList findAll(finalClass entity){ t
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return getHibernateTemplate().find("from K2`WcEe
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} Awf=yE:
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publicList findByNamedQuery(finalString xm,yqM!0A
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namedQuery){ <f{`}drp/
return getHibernateTemplate b+apN ph
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().findByNamedQuery(namedQuery); S%#Mu|
} yZaDNc9'
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publicList findByNamedQuery(finalString query, =C1Qo#QQ%
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finalObject parameter){ &`2*6
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return getHibernateTemplate "fd=(&
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().findByNamedQuery(query, parameter); Vzm7xl [
} iGNKf|8{
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publicList findByNamedQuery(finalString query, c2:kZxT
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finalObject[] parameters){ Z i&X ,K~
return getHibernateTemplate iqP0=(^m
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().findByNamedQuery(query, parameters); vAxtNRS
} gipRVd*TA
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publicList find(finalString query){ o|E(_Y4d
return getHibernateTemplate().find ,1h(k<-
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(query); hmk5
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} `P*j~ZLlXN
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publicList find(finalString query, finalObject s7LX
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parameter){ ( h,F{7
return getHibernateTemplate().find <-7Ha_#
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(query, parameter); Y:BrAa[
} 36UWoo
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public PaginationSupport findPageByCriteria n&&y\?n
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(final DetachedCriteria detachedCriteria){ <!$Cvx\U
return findPageByCriteria -ZJ:<
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); 5@5="lNjS
} Pw1H)<X
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public PaginationSupport findPageByCriteria '.yr8
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(final DetachedCriteria detachedCriteria, finalint oaE3Aa
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startIndex){ )BDi2 : u
return findPageByCriteria {'[1I_3
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(detachedCriteria, PaginationSupport.PAGESIZE, L.[2l Q
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startIndex); ~o$=(EC
} >dY"B$A>
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public PaginationSupport findPageByCriteria huE#VY
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(final DetachedCriteria detachedCriteria, finalint 6!N&,I
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pageSize, S/aPYrk>6
finalint startIndex){ u:|5jF
return(PaginationSupport) %yVZ|d*Q
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getHibernateTemplate().execute(new HibernateCallback(){ u@Lu.t!],
publicObject doInHibernate >LSA?dy!?
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(Session session)throws HibernateException { d=XhOC$
Criteria criteria = 4g9VE;Gd
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detachedCriteria.getExecutableCriteria(session); WMg^W(
int totalCount = 2UquN0
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((Integer) criteria.setProjection(Projections.rowCount +tF,E^
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()).uniqueResult()).intValue(); =O<BMq{d
criteria.setProjection rO~D{)Nu
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(null); -rfO"D>
List items = '*:YC
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criteria.setFirstResult(startIndex).setMaxResults QX4I+x~oo\
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(pageSize).list(); |^{IHF\
PaginationSupport ps = 4^5s\f B
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new PaginationSupport(items, totalCount, pageSize, >=bO@)[
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startIndex); qJ!xhf1
return ps; j:#[voo7
} ;Baf&xK
}, true); ?@#<>7V
} x]:mc%4-Z
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public List findAllByCriteria(final [T|~Kh%#
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DetachedCriteria detachedCriteria){ 4%pvw;r
return(List) getHibernateTemplate g8C+j6uR0
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().execute(new HibernateCallback(){ laAG%lq/'
publicObject doInHibernate [|3
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(Session session)throws HibernateException { n\QG-?%Pi
Criteria criteria = ,70|I{,Km
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detachedCriteria.getExecutableCriteria(session); opBvx>S
return criteria.list(); +XQ6KG&
} 3wK)vW
}, true); S7V;sR"V2
} g+f{I'j
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public int getCountByCriteria(final ve$P=ZuM
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DetachedCriteria detachedCriteria){ (GZm+?
Integer count = (Integer) niFjsTA.Z
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getHibernateTemplate().execute(new HibernateCallback(){ DQ,Q yV
publicObject doInHibernate \"5 \hX~dS
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(Session session)throws HibernateException { } nQHP4'
Criteria criteria = LNj|t)O v
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detachedCriteria.getExecutableCriteria(session); _onHe"%{
return {MIs%w.G
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criteria.setProjection(Projections.rowCount ?)9 6YX'
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()).uniqueResult(); mCg 5-E~;
} HGPbx$!
}, true); X'0A"9
return count.intValue(); }!2|*Y
} xa K:@/
} r!(~Y
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用户在web层构造查询条件detachedCriteria,和可选的 D@mDhhK_
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 r&^4L
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PaginationSupport的实例ps。 vq x;FAqZ
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