Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 xX.Ox
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 [0e]zyB+
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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 w65
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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 uL4@e
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分页支持类: .ODtduURe
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java代码: kB]|4CG{
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package com.javaeye.common.util; F<w/@.&m
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import java.util.List; i9M6%R1m}E
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publicclass PaginationSupport { ,O(XNA(C
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publicfinalstaticint PAGESIZE = 30; }H,A
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privateint pageSize = PAGESIZE; EX&y
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privateList items; 8LwbOR"
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privateint totalCount; 6CU8BDN
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privateint[] indexes = newint[0]; Phgn|
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privateint startIndex = 0; X>|.BvY|
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public PaginationSupport(List items, int knBT(x'+
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totalCount){ 73.o{V
setPageSize(PAGESIZE); 6v1#i
setTotalCount(totalCount); 4!gyFi6$
setItems(items); W# y)ukRv
setStartIndex(0); xD1B50y U
} }u+R,@l/
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public PaginationSupport(List items, int ]@?3,N
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totalCount, int startIndex){ |ns^'q
setPageSize(PAGESIZE); HKcipDW
setTotalCount(totalCount); xHr
setItems(items); %e1vq
setStartIndex(startIndex); $C)@GGY
} iQGoy@<R
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public PaginationSupport(List items, int xSOL4
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totalCount, int pageSize, int startIndex){ @,aL'2G
setPageSize(pageSize); $~~=SOd0
setTotalCount(totalCount); 3.d=1|E
setItems(items); ,.}PZL
setStartIndex(startIndex); uV
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} cW GU?cv}
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publicList getItems(){ ) L{Tn8
return items; {U(h]'
} $uLzC]
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publicvoid setItems(List items){ QX]tD4OH
this.items = items; (I~,&aBr
} m#;:%.Rm
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publicint getPageSize(){ "?9fL#8f*!
return pageSize; s_*eX N
} &gEu%s^wR
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publicvoid setPageSize(int pageSize){ .D>lv_kp
this.pageSize = pageSize; 'FUPv61()
} =k/n
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publicint getTotalCount(){ %mYIXsuH
return totalCount; y=j[v},4
} bL[PNUG
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publicvoid setTotalCount(int totalCount){ _fyw
if(totalCount > 0){ 25~$qY_
this.totalCount = totalCount; sw@2
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int count = totalCount / OVh/t#On
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pageSize; m5x>._7le
if(totalCount % pageSize > 0) <NAR'{f
count++; /pge 7P
indexes = newint[count]; ,/ig8~u'c
for(int i = 0; i < count; i++){ =}"hC`3e
indexes = pageSize * 8
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} bn(Scl#@K
}else{ Cg|uHI*
this.totalCount = 0; &4%J35~
} ( gFA? aD<
} SmLYxH3F
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publicint[] getIndexes(){ uHIWbF<0oo
return indexes; s+w<!`-
} Y'HF^jv]R
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publicvoid setIndexes(int[] indexes){ 0* "j:V
this.indexes = indexes; =dw1Q
} #&:nkzd
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publicint getStartIndex(){ lKD@2
return startIndex; Uy1xNb/d
} [O)Zof
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publicvoid setStartIndex(int startIndex){ jlP7'xt1%
if(totalCount <= 0) ,qHG1#^
this.startIndex = 0; xq)/ QR
elseif(startIndex >= totalCount)
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this.startIndex = indexes :58'U|
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[indexes.length - 1]; 0EB'!
elseif(startIndex < 0) X]*/]Xx
this.startIndex = 0; U; xWW9
else{ @iceMD.
this.startIndex = indexes 3d<HIG^W}
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[startIndex / pageSize]; dtBV0$
} 3# (5Kco
} T> 'Vaxo
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publicint getNextIndex(){ oQXkMKZ
int nextIndex = getStartIndex() + 16Y~5JAc
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pageSize; JT9<kB/07
if(nextIndex >= totalCount) *!/#39
return getStartIndex(); -]A#G`'
else .%<&W1
return nextIndex; 4~Pto
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} Ft rw3OxN
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publicint getPreviousIndex(){ 7tpZE+OX
int previousIndex = getStartIndex() - pdHb
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pageSize; 3ky+qoe
if(previousIndex < 0) X&~Eo
return0; p4EItRZS
else M\6`2q
return previousIndex; gc~h!%'.I
} mlWIq]J
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} N6[^62
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抽象业务类 }gi'%e
java代码: cZzZNGY^ts
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/** ^ks^9*'|j
* Created on 2005-7-12 =ol][)Bd
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package com.javaeye.common.business; {:X];A$
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import java.io.Serializable; * _lo;
import java.util.List; *SMPHWH[c
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import org.hibernate.Criteria; @e0skc
import org.hibernate.HibernateException; [s{:}ZuKc
import org.hibernate.Session; Ur(o&,
import org.hibernate.criterion.DetachedCriteria; .6F3;bg R7
import org.hibernate.criterion.Projections; I?g__u=n~
import h}>/Z3*
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org.springframework.orm.hibernate3.HibernateCallback; ZC*d^n]x.
import 3a}`xCO5
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org.springframework.orm.hibernate3.support.HibernateDaoS 51ebE`
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upport; PjW+V`
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import com.javaeye.common.util.PaginationSupport; $#FlnM<=
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public abstract class AbstractManager extends WbWW=(N'd
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HibernateDaoSupport { LC\:xia{X
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privateboolean cacheQueries = false; -+>r4P
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privateString queryCacheRegion; 0P40K
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publicvoid setCacheQueries(boolean &E
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cacheQueries){ 9PqgBq
this.cacheQueries = cacheQueries; U"Hquo
} nSQ}yqM)
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publicvoid setQueryCacheRegion(String O\Mq<;|7m
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queryCacheRegion){ ?EQ^n3U$
this.queryCacheRegion = 3e6Y
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queryCacheRegion; X5|/s::u
} 5vF}F^
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publicvoid save(finalObject entity){ q+n1~AT
getHibernateTemplate().save(entity); :+Q"MIU
} y*b.eO
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publicvoid persist(finalObject entity){ q VdC ?A|
getHibernateTemplate().save(entity); mhLRi\[c )
} &f<1=2dm
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publicvoid update(finalObject entity){ 7$'mC9
getHibernateTemplate().update(entity); <uKm%~xi<
} T|s0qQi
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publicvoid delete(finalObject entity){ U%t/wq
getHibernateTemplate().delete(entity); 8{<[fZyC
} [&qbc#L
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publicObject load(finalClass entity, :6j :9lYL2
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finalSerializable id){ /3[9{r
return getHibernateTemplate().load 42>m,fb2[
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(entity, id); ^_KD&%M6
} bxdXZBn
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publicObject get(finalClass entity, !ObE{2Enf
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finalSerializable id){ "8muMa8Q%
return getHibernateTemplate().get s9rtXBJP
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(entity, id); fEw=I7{Y
} ^'[@M'`~L
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publicList findAll(finalClass entity){ YZH#5]o8
return getHibernateTemplate().find("from |^PLZ>
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" + entity.getName()); [+l
} Xs>s|_T
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publicList findByNamedQuery(finalString
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namedQuery){ XJh:U0
return getHibernateTemplate 7ZL#f![{
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().findByNamedQuery(namedQuery); crNjI`%tw
} _MdZDhtm
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publicList findByNamedQuery(finalString query, [Yy\>
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finalObject parameter){ 9vp%6[
return getHibernateTemplate PyMVTP4
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().findByNamedQuery(query, parameter); !rXcGj(k
} >WGP{
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publicList findByNamedQuery(finalString query, 9y^kb+
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finalObject[] parameters){ \+{t4Im
return getHibernateTemplate r9]
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().findByNamedQuery(query, parameters); fi&uB9hc
} MV<!<Qmj
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publicList find(finalString query){ ?]W~ qgA
return getHibernateTemplate().find kPO6gdwq$
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(query); w*:GM8=6
} p/hvQyE
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publicList find(finalString query, finalObject CzSZ>E$%U
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parameter){ 2gwZb/'i
return getHibernateTemplate().find ,!I?)hwOC
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(query, parameter); -SvTg{Q{la
} ^`rpf\GX(
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public PaginationSupport findPageByCriteria \TbsoWX
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(final DetachedCriteria detachedCriteria){ V#NG+U.B
return findPageByCriteria ~!ZmF(:
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); 382*
} F!gNt<fZ
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public PaginationSupport findPageByCriteria ym|NT0_0
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(final DetachedCriteria detachedCriteria, finalint 6 u-$
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startIndex){ h(@R]GUX
return findPageByCriteria <)O>MI'
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(detachedCriteria, PaginationSupport.PAGESIZE, > -y&$1
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startIndex); vZ$U^>":
} i<T P:
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public PaginationSupport findPageByCriteria g@~!kh,TH
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(final DetachedCriteria detachedCriteria, finalint D XV@DQ
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pageSize, <nWKR,
finalint startIndex){ , 3X: )
return(PaginationSupport) XXW]0{k:y
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getHibernateTemplate().execute(new HibernateCallback(){ ;} l T
publicObject doInHibernate :)#hrFp
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(Session session)throws HibernateException { *u>lx!g
Criteria criteria = E6Q]A~
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detachedCriteria.getExecutableCriteria(session); :dP~.ZY7
int totalCount = SY-ez91
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((Integer) criteria.setProjection(Projections.rowCount I^~=,D
{L@+(I
()).uniqueResult()).intValue(); 0K<x=-cCB
criteria.setProjection .,3Zj /
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(null); Rj[hhSx 2
List items = &<,SV^wag
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criteria.setFirstResult(startIndex).setMaxResults qib7Z]j
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(pageSize).list(); [X,A'Q
PaginationSupport ps = AR%hf
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new PaginationSupport(items, totalCount, pageSize, CjZZm^O
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startIndex); w*50ZS;N
return ps; i S%
} OJAx:&