Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 Re{vO&.
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 ;{79d8/=
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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 f\}fUg2
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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 Gvk)H$ni
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分页支持类: |Fk>NX
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java代码: |?=K'[5
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package com.javaeye.common.util; RjY(MSc
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import java.util.List; P5Y:c@u2
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publicclass PaginationSupport { >TT4;p h
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publicfinalstaticint PAGESIZE = 30; /G`'9cD
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privateint pageSize = PAGESIZE; E({W`b~_f
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privateList items; =ILE/pC-|
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privateint totalCount; ]uN}n;`12
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privateint[] indexes = newint[0]; uz6S7I
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privateint startIndex = 0; cRm+?/
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public PaginationSupport(List items, int ALVHKL2
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totalCount){ \a+.~_iL|
setPageSize(PAGESIZE); 5\MCk "R!
setTotalCount(totalCount); >YwvM=b"V
setItems(items); ztcV[{[g
setStartIndex(0); n.&z^&$w\)
} K}e%E&|>
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public PaginationSupport(List items, int $9!2c /
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totalCount, int startIndex){ }w{6Ua
setPageSize(PAGESIZE); [&e|:1
setTotalCount(totalCount); ),ur!v
setItems(items); LO8`qq*rq
setStartIndex(startIndex); SJg4P4|
} V(hM@ztN
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public PaginationSupport(List items, int ,Jm2|WKH
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totalCount, int pageSize, int startIndex){ '
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setPageSize(pageSize); x3j)'`=15
setTotalCount(totalCount); J:<mq5[
setItems(items); .ME>ICA
setStartIndex(startIndex); a<c]N:1
} dux.Z9X?
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publicList getItems(){ u^HC1r|%
return items; w;@NYMK)
} cEI
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publicvoid setItems(List items){ 5bKBVkJ'
this.items = items; wKxw|Fpn
} Nm;yL
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publicint getPageSize(){ kiYHJ\a
return pageSize; GtR!a
} ! =(OvX_<
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publicvoid setPageSize(int pageSize){ _{Q)5ooP
this.pageSize = pageSize; U"nk AW
} ,%)O/{p_
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publicint getTotalCount(){ E@}N}SR
return totalCount; hkS0 ae
} bTBV:]w
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publicvoid setTotalCount(int totalCount){ >6Y@8 )
if(totalCount > 0){ j) G<PW
this.totalCount = totalCount; o#GZ|9IL
int count = totalCount / Qt-7jmZw1
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pageSize; z$64Ep#
if(totalCount % pageSize > 0) +D7>$&BD
count++; x*H,eY3
indexes = newint[count]; JWZG)I]r
for(int i = 0; i < count; i++){ =VC"X ?N
indexes = pageSize * V{jQ=<)@e
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} {5 V@O_*{
}else{ |7Dc7p"D
this.totalCount = 0; QZwUv<*
} rra|}l4Y
} EM2=g9y
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publicint[] getIndexes(){ %mqep5n(
return indexes; ]>vC.iYp
} v11Uw?CM
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publicvoid setIndexes(int[] indexes){ nXU`^<nA
this.indexes = indexes; u[:-^H
} `T'[H/
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publicint getStartIndex(){ ^LI\W'K
return startIndex; o#Gf7.E8
} 6Qc
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publicvoid setStartIndex(int startIndex){ #%9t-
if(totalCount <= 0) 9%#u,I
this.startIndex = 0; Rb/|ae
elseif(startIndex >= totalCount) ^X]rFY1
this.startIndex = indexes u0Q6+U
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[indexes.length - 1]; Z= +Tw!wR>
elseif(startIndex < 0) @23?II$=@
this.startIndex = 0; I K9plsd*
else{ Oj=g;iY
this.startIndex = indexes wZUZ"Y}9
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[startIndex / pageSize]; eoj(zY3
} $~3?nib"j
}
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publicint getNextIndex(){ wC>}9OM
int nextIndex = getStartIndex() + 7v']wA r]
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pageSize; ~|Nj+A
if(nextIndex >= totalCount) 2%?Kc]JY9
return getStartIndex(); $x~U&a
else 7+NBcZuG9
return nextIndex; w,T-vf
} E8/Pi>QW
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publicint getPreviousIndex(){ qdPmTaak
int previousIndex = getStartIndex() - W-RqooEv
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pageSize; /Moyn"Kj{
if(previousIndex < 0) v) j3YhY
return0; M!`&Z9N
else >6KwZr BB
return previousIndex; aCRiW;+'
} Mdw"^x$7
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} YB+My~fw{l
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抽象业务类 3^Q;On|
java代码: {_G_YL[
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/** @ N@
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* Created on 2005-7-12 yHo#v:>?p
*/ LVaJyI@/>
package com.javaeye.common.business; v8"Zru
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import java.io.Serializable; N0pA ,&
import java.util.List; ;S9
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import org.hibernate.Criteria; M?00n< vM
import org.hibernate.HibernateException; ;uho.)%N`F
import org.hibernate.Session; wii.0~p
import org.hibernate.criterion.DetachedCriteria; YJ!jdE}
import org.hibernate.criterion.Projections; Yc:>Yzj(z
import Z5V_?bm$
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org.springframework.orm.hibernate3.HibernateCallback; OI,F,4e
import j;<s!A#
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org.springframework.orm.hibernate3.support.HibernateDaoS vX?C9Fr 2
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upport; Ou_2UT
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import com.javaeye.common.util.PaginationSupport; @rv)J[7Y&
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public abstract class AbstractManager extends 8]i7wq#=
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HibernateDaoSupport { g;7W%v5wqk
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privateboolean cacheQueries = false; D/ tCB-+
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privateString queryCacheRegion; z.!u<hy(
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publicvoid setCacheQueries(boolean Jz]OWb *
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cacheQueries){ k]9y+WC2
this.cacheQueries = cacheQueries; ;v!Ef"E|cV
} gDjAnz#
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publicvoid setQueryCacheRegion(String ,*sKr)9)
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queryCacheRegion){ Jim5Ul
this.queryCacheRegion = \('WS[$2
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queryCacheRegion; /&E]qc*-p
} Z kBWVZb
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publicvoid save(finalObject entity){ pQxv_4
getHibernateTemplate().save(entity); Ml,in49
} iX6*OEl/Q
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publicvoid persist(finalObject entity){ O<J<)_W)
getHibernateTemplate().save(entity); l\TL=8u2c
} XaaR>HljJ
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publicvoid update(finalObject entity){ .7+"KP:
getHibernateTemplate().update(entity); '(zP;
} 09=w
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publicvoid delete(finalObject entity){ w^ X@PpP
getHibernateTemplate().delete(entity); /vPr^Wv
} ^SbxClUfw!
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publicObject load(finalClass entity, ;3iWV"&_A
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finalSerializable id){ 4WPco"xH!
return getHibernateTemplate().load j>5X^Jd
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(entity, id); L lD=c
} w3;T]R*
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publicObject get(finalClass entity, hbSKlb0d
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finalSerializable id){ EgRuB@lw76
return getHibernateTemplate().get Rsx?8Y^5
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(entity, id); {rzQ[_)EC
} x=N0H
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publicList findAll(finalClass entity){ T#KVN{O
return getHibernateTemplate().find("from ~ymSsoD^
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" + entity.getName()); 9R:?vk4
} a_zf*;
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publicList findByNamedQuery(finalString L% T%6p_
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namedQuery){ {>3w"(f7o
return getHibernateTemplate Bw.?Me)mf|
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().findByNamedQuery(namedQuery); g(R!M0hdF
} 'X~CrgQl
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publicList findByNamedQuery(finalString query,
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finalObject parameter){ S-79uo
return getHibernateTemplate (\4YBaGd
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().findByNamedQuery(query, parameter); &-KQ
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} {~V_6wY g
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publicList findByNamedQuery(finalString query,
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finalObject[] parameters){ \,G19o}`Es
return getHibernateTemplate '<h@h*R
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().findByNamedQuery(query, parameters); ||;a#FZ^
} ~Q)Dcit-
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publicList find(finalString query){ BQ{'r^u
return getHibernateTemplate().find R4XcWx*pQ
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(query); T'7x,8&2|
} R7Ns5s3X
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publicList find(finalString query, finalObject ;n b>IL
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parameter){ bQwiJ`B&
return getHibernateTemplate().find \V*E:_w*
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(query, parameter); >+S* Wtm5
} % %QAC4
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public PaginationSupport findPageByCriteria Jh%k:TrBm
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(final DetachedCriteria detachedCriteria){ $]b&3_O$N8
return findPageByCriteria ;{rl
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); =@k3*#\
} &uJ7[m19z
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public PaginationSupport findPageByCriteria )Ju$PrO
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(final DetachedCriteria detachedCriteria, finalint leEzfbb{'.
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startIndex){ [~ |e:
return findPageByCriteria gR{.0e
q?oJ=]m"
(detachedCriteria, PaginationSupport.PAGESIZE, 7
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startIndex); dYhLk2
} mW U*}-M
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public PaginationSupport findPageByCriteria |)Sx"B)
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(final DetachedCriteria detachedCriteria, finalint 1I U*:Z;Rz
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pageSize, ]TKM.[[
finalint startIndex){ kN$L8U8f
return(PaginationSupport) ?[q.1O
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getHibernateTemplate().execute(new HibernateCallback(){ }UHoa
publicObject doInHibernate B9h>
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(Session session)throws HibernateException { .:jfNp~jt
Criteria criteria = Q"H1(kG|
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detachedCriteria.getExecutableCriteria(session); W$Zc;KRz$0
int totalCount = LL=nMoS
Jx= v6==7
((Integer) criteria.setProjection(Projections.rowCount h2edA#bub
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()).uniqueResult()).intValue(); UjQi9ELoJ
criteria.setProjection f5QJj<@
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(null); %GDs/9
List items = pn2_ {8.
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criteria.setFirstResult(startIndex).setMaxResults @T+pQ)0{{
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(pageSize).list(); Z= P=oldH
PaginationSupport ps = lr@H4EJ{
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new PaginationSupport(items, totalCount, pageSize, D`uOBEX
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startIndex); &