Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 A$*#n8,
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 f4.k%| ]
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据这一功能,我设计了通用的抽象Bean基类和分页类支持,代码来 g$C-G5/bjD
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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 F\&Sn1>k
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分页支持类: +-_71rJc.
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java代码: ="E^9!
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package com.javaeye.common.util; &' ,A2iG
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import java.util.List; !]c]:ed\C
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publicclass PaginationSupport { WT(inf[
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publicfinalstaticint PAGESIZE = 30; / S
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privateint pageSize = PAGESIZE; ~Ab nksR
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privateList items; #hinb[fQ
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privateint totalCount; jDI )iW`P
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privateint[] indexes = newint[0]; Nxk3uF^
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privateint startIndex = 0; +$]eA'Bh@
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public PaginationSupport(List items, int |n9~2R
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totalCount){ 9o-fI@9
setPageSize(PAGESIZE); !N5+.E0j
setTotalCount(totalCount); R Wa4O#
setItems(items); ^/;W;C{4
setStartIndex(0); HI}$Z=C
} |ocIp/$
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public PaginationSupport(List items, int x!\FB.h4!(
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totalCount, int startIndex){ J?/.|Y]e
setPageSize(PAGESIZE); O6rrv,+_L
setTotalCount(totalCount); >dH5n$Gb
setItems(items); <^:e)W
setStartIndex(startIndex); g=eYl_P6
} L #'N
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public PaginationSupport(List items, int 8o' a
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totalCount, int pageSize, int startIndex){ r()%s3$q
setPageSize(pageSize); |||uTfrJ
setTotalCount(totalCount); xEK+NKTeV
setItems(items);
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setStartIndex(startIndex); tCnx:1
} 99Xbp P55
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publicList getItems(){ KM$5ZbCF:
return items; ?VM# Nf\
} Dd+ f,$
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publicvoid setItems(List items){ ~$g$31/
this.items = items; tPO\ e]
} .E!p
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publicint getPageSize(){ r,p6J7/lfS
return pageSize; nquKeH
} *SkUkqP9z
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publicvoid setPageSize(int pageSize){ '&L ;y
this.pageSize = pageSize; x'Z<
} bXcDsP$.
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publicint getTotalCount(){ D;bQ"P-m47
return totalCount; jRz2l`~7#
} g*UI~rp
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publicvoid setTotalCount(int totalCount){ KMz\h2X
if(totalCount > 0){ \=+s3p5N
this.totalCount = totalCount; \ iL&Aq}BO
int count = totalCount / Qy ;
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pageSize; hjiU{@q
if(totalCount % pageSize > 0) oOk.Fq
count++; B`Q.<Lqu
indexes = newint[count]; .8is!TT
for(int i = 0; i < count; i++){ O[RmQ8ll
indexes = pageSize * _] E ~ci}
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} Vv(!Ki}
}else{ s{q)m@
this.totalCount = 0; { .KCK_ d
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} p},6W,f
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publicint[] getIndexes(){ +Q, 0kv
return indexes; LV:oNK(
} & -
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publicvoid setIndexes(int[] indexes){ (_ov_3
this.indexes = indexes; ~CRr)(M
} b5YjhRimS
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publicint getStartIndex(){ ZTG*|
return startIndex; ?uUK9*N
} :W5*fE(i
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publicvoid setStartIndex(int startIndex){ =
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if(totalCount <= 0) AqVTHyCu
this.startIndex = 0; [|UW_Bz
elseif(startIndex >= totalCount) iV#JJ-OBq
this.startIndex = indexes sm}q&m]ad
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[indexes.length - 1]; Df;FOTTi%
elseif(startIndex < 0) .<v0y"amJ
this.startIndex = 0; R!xs;|]
else{ )!MeSWGq
this.startIndex = indexes '<f4POy!
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[startIndex / pageSize]; ?8Cxt|o>
} )rD] y2^<
} !@-j!Ub
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publicint getNextIndex(){ 7\^b+*
int nextIndex = getStartIndex() + ,[+
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pageSize; sS OI5W3A
if(nextIndex >= totalCount) +-,Q>`
return getStartIndex(); IoNZ'g?d
else T3['6%
return nextIndex; 3y> .1
} u*[,W-R&
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publicint getPreviousIndex(){ D_O%[u}
int previousIndex = getStartIndex() - D0PP
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pageSize; H;s0|KRgJ
if(previousIndex < 0) uc%75TJ@
return0; -;T>4B=
else 2uw%0r3Vi6
return previousIndex; n4)G g~PE
} ))!Z2PfD
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} +IVVsVp
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抽象业务类 'jcDfv(v<
java代码: iAf, :g
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/** XPzwT2_E
* Created on 2005-7-12 =,-80WNsX
*/ HeGGAjc
package com.javaeye.common.business; iUA2/ A
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import java.io.Serializable; *P:`{ZV7=W
import java.util.List; [x!T<jJ
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import org.hibernate.Criteria; DcoTa-~
import org.hibernate.HibernateException; j]J2,J
import org.hibernate.Session; 8nES=<rz
import org.hibernate.criterion.DetachedCriteria; n_v c}ame
import org.hibernate.criterion.Projections; '.atbl
import WKBPqfC
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org.springframework.orm.hibernate3.HibernateCallback; a%ec: %
import 7H[#
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org.springframework.orm.hibernate3.support.HibernateDaoS QfU
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upport; 5#d"]7
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import com.javaeye.common.util.PaginationSupport; t> &$_CSWK
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public abstract class AbstractManager extends @)VJ,Ql$Y
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HibernateDaoSupport { CJjma=XH
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privateboolean cacheQueries = false; MnKEZ: 2
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privateString queryCacheRegion; 8<)[+@$0
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publicvoid setCacheQueries(boolean H)
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cacheQueries){ ]lQhIf6)k
this.cacheQueries = cacheQueries; '4HwS$mW3
} U@D=.6\B
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publicvoid setQueryCacheRegion(String ]|Vm!Q
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queryCacheRegion){ bvEk.~tC'
this.queryCacheRegion = *KxV;H8/
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queryCacheRegion; PhKJ#DRbr
} tDEpR
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publicvoid save(finalObject entity){
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getHibernateTemplate().save(entity); o,bV.O.W
} 7_#v_ A^
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publicvoid persist(finalObject entity){ mg'-]>$ $]
getHibernateTemplate().save(entity); 3zWY%(8t4?
} _PNU*E%s<
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publicvoid update(finalObject entity){ Vize0fsD
getHibernateTemplate().update(entity); uT]_pKm
} 5?9}^s4
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publicvoid delete(finalObject entity){ 5I T'u3V
getHibernateTemplate().delete(entity); BHZGQm
} s}|IRDpp
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publicObject load(finalClass entity, P|HY=RMa
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finalSerializable id){ @!%<JZEz3
return getHibernateTemplate().load e
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(entity, id); Duptles
} vU{ZB^+&6o
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publicObject get(finalClass entity, a^Zn
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finalSerializable id){ !S(jT?'w
return getHibernateTemplate().get Bu!Gy8\
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(entity, id); \,p)
} /^/'9}7
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publicList findAll(finalClass entity){ 1+#Vj#
return getHibernateTemplate().find("from PJkMn
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" + entity.getName()); 6mRvuJ%
} MlRgdVX
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publicList findByNamedQuery(finalString \8Blq5n-O*
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namedQuery){ "]MF =-v
return getHibernateTemplate ;=h^"et
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().findByNamedQuery(namedQuery); & rw|fF|]
} C:4h
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publicList findByNamedQuery(finalString query, ?r'b
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finalObject parameter){ lZn <v'y
return getHibernateTemplate qY14LdC}~
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().findByNamedQuery(query, parameter); $
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} o6vm(I%
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publicList findByNamedQuery(finalString query, 0dIJgKanGP
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finalObject[] parameters){ ,3fw"P$
return getHibernateTemplate mGL%<4R,
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().findByNamedQuery(query, parameters); d6hWmZVC
} P\N`E?lJL
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publicList find(finalString query){ 3QV|@5L`[
return getHibernateTemplate().find .' .|s?s
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(query); ;Rwr5
} Z71"d"
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publicList find(finalString query, finalObject OSkZW
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parameter){ 2@e<II2ha8
return getHibernateTemplate().find Itz_;+I.Mp
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(query, parameter); L}:u9$w
} 6x[gg !;85
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public PaginationSupport findPageByCriteria N@j|I* y|
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(final DetachedCriteria detachedCriteria){ 1L &_3}
return findPageByCriteria :1.$7Wt
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); $orhY D3gv
} hsfVKlw-
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public PaginationSupport findPageByCriteria ?"sk"{
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(final DetachedCriteria detachedCriteria, finalint dnNc,l&g
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startIndex){ 5jYRIvM[Q~
return findPageByCriteria IL>Gi`Y&
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(detachedCriteria, PaginationSupport.PAGESIZE, pOS.`rSK
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startIndex); z@iY(;Qo
} B~~rLo:a
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public PaginationSupport findPageByCriteria .[O*bk
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(final DetachedCriteria detachedCriteria, finalint =AR'Pad
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pageSize, #Va@4<4r
finalint startIndex){ mH}AVje{
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return(PaginationSupport) q"]-CGAa
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getHibernateTemplate().execute(new HibernateCallback(){ L"('gc!W
publicObject doInHibernate gL}K84T$S
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(Session session)throws HibernateException { ?}lCS7&
Criteria criteria = ]qv/+~Qs>
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detachedCriteria.getExecutableCriteria(session); ADHe![6q
int totalCount = {}lw%d?A
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((Integer) criteria.setProjection(Projections.rowCount 2@^8{
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()).uniqueResult()).intValue(); lWOB!l
criteria.setProjection M}@^8
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(null); L2K4nTA
List items = 0n3O;=[aV
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criteria.setFirstResult(startIndex).setMaxResults ICV67(Ui
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(pageSize).list(); x$M[/ID0
PaginationSupport ps = [0IeEjL
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new PaginationSupport(items, totalCount, pageSize, Em
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startIndex); \8F$85g
return ps; _G'.VSGH
} gk]r:p<