Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 p27Dcwov
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 *'/,
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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 x>#{C,Fi
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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 ^{+ry<rS>
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分页支持类: a1cX+{W
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java代码: CY1WT
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package com.javaeye.common.util; H%wB8Y
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import java.util.List; ]&*POri&
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publicclass PaginationSupport {
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publicfinalstaticint PAGESIZE = 30; #I/P9)4
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privateint pageSize = PAGESIZE; 1V%tev9a
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privateList items; Y6jyU1>
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privateint totalCount; %rW}x[M%w?
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privateint[] indexes = newint[0]; 0j$\k|xFXZ
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privateint startIndex = 0; e=sc$1|4=
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public PaginationSupport(List items, int }je<^]a
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totalCount){ / ;`H )
setPageSize(PAGESIZE); E)v~kC}7.
setTotalCount(totalCount); noZbsI4
setItems(items); t7Q$
setStartIndex(0); Y)rK'OY'
}
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public PaginationSupport(List items, int MP%#)O6
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totalCount, int startIndex){ ^{Y, `F
setPageSize(PAGESIZE); +b|F_
setTotalCount(totalCount); k6tCfq;
setItems(items); =M\yh,s!
setStartIndex(startIndex); bxXpw&
} >q}3#TvP@
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public PaginationSupport(List items, int 14,)JZN
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totalCount, int pageSize, int startIndex){ { 53FR
setPageSize(pageSize); H=/1d.p
setTotalCount(totalCount); 1-kuK<KR
setItems(items); V3,C5KKk&z
setStartIndex(startIndex); 9jal D
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} `G\
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publicList getItems(){ z|g2Q#$-\S
return items;
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} M
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publicvoid setItems(List items){ lu#a.41
this.items = items; zEQ]5>mG
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publicint getPageSize(){ IFLphm5
return pageSize; ql?w6qFs]
} |_53So:g
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publicvoid setPageSize(int pageSize){ uLdHE5vr
this.pageSize = pageSize; 5wK==hZ
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publicint getTotalCount(){ !r/i<~'Bx
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publicvoid setTotalCount(int totalCount){ rZI63S
if(totalCount > 0){ }9OMXLbRv
this.totalCount = totalCount; Xu{y5N
int count = totalCount / X9*n[ev
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pageSize; 1hbQ30
if(totalCount % pageSize > 0) a~2Jf @I3
count++; 1j2U,_-
indexes = newint[count];
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for(int i = 0; i < count; i++){ rJ/HIda
indexes = pageSize * VwR\"8r3
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} X}#vt?mu
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this.totalCount = 0; tB;PGk_6
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publicint[] getIndexes(){ f1NHW|_j
return indexes; wBt7S!>G
} -Mo4`bN
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publicvoid setIndexes(int[] indexes){ g$Tsht(rHD
this.indexes = indexes; TOiLv.Dor
} qO@vXuul,
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publicint getStartIndex(){ *zRig|k !H
return startIndex; shw?_#?1dy
} ^!tX+`,6^
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publicvoid setStartIndex(int startIndex){ N[@~q~v
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this.startIndex = 0; Od.@G ~
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this.startIndex = indexes /`cy4<
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[indexes.length - 1]; =p|IWn{P
elseif(startIndex < 0) 3[#^$_96b
this.startIndex = 0; :[a*I6/^
else{ #19O5
this.startIndex = indexes q}i#XQU
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} ^E%R5JN
} -#%M,Qb
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publicint getNextIndex(){ :{<|,3oNdR
int nextIndex = getStartIndex() + Q
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if(nextIndex >= totalCount) Q`i@['?p
return getStartIndex(); A^lm 0[3q
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return nextIndex; wQW`Er3w
} .i\FK@2
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publicint getPreviousIndex(){ )pI( <
int previousIndex = getStartIndex() - G=qlE?j`j
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return previousIndex; T6y~iNd<
} Vu_oxL}
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抽象业务类 ~xzr8 P
java代码: |i
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/** [cDkmRV
* Created on 2005-7-12 o0AT&<K
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package com.javaeye.common.business; 86LE
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import java.io.Serializable; lOA
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import java.util.List; ~!ei]UP
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import org.hibernate.Criteria; b~ )@e9
import org.hibernate.HibernateException; HH6n3c!:mm
import org.hibernate.Session; E$_zBD%
import org.hibernate.criterion.DetachedCriteria; 'Rnzu0<lF
import org.hibernate.criterion.Projections; idHI)6!
import o5/BE`VD5c
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org.springframework.orm.hibernate3.HibernateCallback; xd `MEOY
import 0fj C>AS
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org.springframework.orm.hibernate3.support.HibernateDaoS @|h9jx|
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upport; 1N65 M=)
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import com.javaeye.common.util.PaginationSupport; {$t*XTY6R
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public abstract class AbstractManager extends _{): w~zi
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HibernateDaoSupport { ,e|"p[z~T
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privateboolean cacheQueries = false; iWWtL
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privateString queryCacheRegion; L~/L<M s
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publicvoid setCacheQueries(boolean =84EX<B
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cacheQueries){ W*iTg%a\k
this.cacheQueries = cacheQueries; ]Ndy12,M
} S~r75] "
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publicvoid setQueryCacheRegion(String >r X$E<B\
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queryCacheRegion){ 1mHS -oI9J
this.queryCacheRegion = +<$nZ=,hsy
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queryCacheRegion; }>y!I5O
} Rkg)yme!N
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publicvoid save(finalObject entity){ C ]B P}MY<
getHibernateTemplate().save(entity); qh W]Wd"g
} DXj>u9*%
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publicvoid persist(finalObject entity){ {o^tSEN!-
getHibernateTemplate().save(entity); H9'psv
} #B <%
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publicvoid update(finalObject entity){ 2\&3x}@
getHibernateTemplate().update(entity); 3O4,LXdA
} :G98uX t
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publicvoid delete(finalObject entity){ xC5Pv">
getHibernateTemplate().delete(entity); (!b)<V*
} !\VEUF,K?
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publicObject load(finalClass entity, 5"G-r._
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finalSerializable id){ gT+wn-3
return getHibernateTemplate().load 0datzEns`
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(entity, id); T9J&^I
} E;`^`T40
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publicObject get(finalClass entity, OpazWcMoo
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finalSerializable id){ :Hb`vH3x
return getHibernateTemplate().get QoUdTIIL
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} y:Gn58\o
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publicList findAll(finalClass entity){ bxwwYSS
return getHibernateTemplate().find("from z}==6|{
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" + entity.getName()); 6DU(KYN
} 569p/?
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publicList findByNamedQuery(finalString 9fs-|E[5
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namedQuery){ Nw9:Gi
return getHibernateTemplate UpD4'!<buV
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().findByNamedQuery(namedQuery); >}+R+''nR
} :81d~f7
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publicList findByNamedQuery(finalString query, ckV\f({
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finalObject parameter){
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return getHibernateTemplate
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().findByNamedQuery(query, parameter); /9gn)q2f(
} NNr6~m)3v
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publicList findByNamedQuery(finalString query, b{aB^a:f=L
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finalObject[] parameters){ CV=qcD
return getHibernateTemplate f|_\GVW
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().findByNamedQuery(query, parameters); WcT= 5G
} u23_*W\
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publicList find(finalString query){ |.m)UFV
return getHibernateTemplate().find S:i#|T."
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(query); ig YYkt
} SWhzcqp
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publicList find(finalString query, finalObject PW5)") z
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parameter){ |By[ev"Kh%
return getHibernateTemplate().find %,~\,+NP
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(query, parameter); 5oCg&aT
} ~4=*kJ#7
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public PaginationSupport findPageByCriteria }[lP^Qs
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(final DetachedCriteria detachedCriteria){ -G/qfd|s/
return findPageByCriteria Fx.Ly]L
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); sCt)Yp+8}B
} 9M($_2,44
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public PaginationSupport findPageByCriteria QD3tM5(Yr
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(final DetachedCriteria detachedCriteria, finalint ))Z>$\<:
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startIndex){ ;/Z-|+!IJt
return findPageByCriteria 0,m]W)
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(detachedCriteria, PaginationSupport.PAGESIZE, Cy/VH"G=
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startIndex); vK+reXE
} d8agM/F*/
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public PaginationSupport findPageByCriteria VZr:yE
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(final DetachedCriteria detachedCriteria, finalint Ng !d6]
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pageSize, N8Z z6{rp
finalint startIndex){ Mh~}RA"H
return(PaginationSupport) (&Lt&i _
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getHibernateTemplate().execute(new HibernateCallback(){ 6YNL4HE?
publicObject doInHibernate qF`6l(
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(Session session)throws HibernateException { Mth:V45G|
Criteria criteria = ti%RE:*
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detachedCriteria.getExecutableCriteria(session); TvDC4tm-:
int totalCount = 3Ji$igL
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((Integer) criteria.setProjection(Projections.rowCount 7p2xst
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()).uniqueResult()).intValue(); 7_ayn#;y
criteria.setProjection >O24#!9XW
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(null); , p~1fB-/
List items = J+E,Ui ZU
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criteria.setFirstResult(startIndex).setMaxResults mrnPZf i
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(pageSize).list(); e*lL.
PaginationSupport ps = M:}u|
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new PaginationSupport(items, totalCount, pageSize, f4Y)GO<R]
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startIndex); V+lF|CZb5
return ps; xIa7F$R 0
} D 6y,Q
}, true); Rb0I7~Z%'d
} 0]
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