Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 RF\1.HJG
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 :9O0?6:B|
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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 =QO1FO
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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 9-e[S3ziM
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分页支持类: _|Kv~\G!
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java代码: n!EH>'T
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package com.javaeye.common.util; <8xP-(wk;
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import java.util.List; iTtAj~dfZ
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publicclass PaginationSupport { v"?PhO/{=
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publicfinalstaticint PAGESIZE = 30; cq+M
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privateint pageSize = PAGESIZE; -EX3'
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privateList items; \]d*h]Hms
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privateint totalCount; vN6]6nUOiT
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privateint[] indexes = newint[0]; h0EGhJs
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privateint startIndex = 0; @8 yE(
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public PaginationSupport(List items, int 5/eS1NJ@
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totalCount){ |@n{tog+-
setPageSize(PAGESIZE); :J)lC =
setTotalCount(totalCount); \~1zAiSd>#
setItems(items); KLv
setStartIndex(0); u=UM^C!
} KzH}5:qI
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public PaginationSupport(List items, int E0?\DvA
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totalCount, int startIndex){ p?gLW/n
setPageSize(PAGESIZE); MBTt'6M
setTotalCount(totalCount); SO jDtZ
setItems(items); :+V1682u
setStartIndex(startIndex); b-=[(]_$h
} '9F{.]
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public PaginationSupport(List items, int e hB1`%@
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totalCount, int pageSize, int startIndex){ Q24:G
setPageSize(pageSize); QvQf@o
setTotalCount(totalCount); u5)A+.v
setItems(items); y:`` |*+
setStartIndex(startIndex); M6d w~0e
} o>,z %+
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publicList getItems(){ J'4@-IM
return items; BU?MRcHC
} U;A5-|C
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publicvoid setItems(List items){ Vv"wf;#
this.items = items; I4p= ?Ds
} _e@qv;*
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publicint getPageSize(){ m_U6"\n 5
return pageSize; z=h5
} a} fS2He
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publicvoid setPageSize(int pageSize){ (uxQBy
this.pageSize = pageSize; =y(YMWGS
} !'t2
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publicint getTotalCount(){ - 5Wt9
return totalCount; }8]uZ)[p=
} .A[.?7g
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publicvoid setTotalCount(int totalCount){ ,* vnt6C*
if(totalCount > 0){ (cew:z
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this.totalCount = totalCount; Q7aDl8L xn
int count = totalCount / #CP, \G
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pageSize; 3\.)y49,1
if(totalCount % pageSize > 0) fQA)r
count++; i/EiUH/~
indexes = newint[count]; ik NFW*p
for(int i = 0; i < count; i++){ A,[m=9V
indexes = pageSize * Mz.&d:
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} 5GxM?%\
}else{ `.-k%2?/
this.totalCount = 0; ]4~D;mv
} M!XFb
} _SW a3O#'
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publicint[] getIndexes(){ Llc|j&yHQ
return indexes; >f05+%^[
} Q&'Nr3H#tZ
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publicvoid setIndexes(int[] indexes){ _~q^YZ
this.indexes = indexes; rBPxGBd4
} _qo1 GM&
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publicint getStartIndex(){ :DpK{$eCb
return startIndex; qNVw+U;2P
} uvM88#
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publicvoid setStartIndex(int startIndex){ >A "aOV>K
if(totalCount <= 0) &-Y:4.BX Z
this.startIndex = 0; o%4+I>
elseif(startIndex >= totalCount) ul&7hHp_u%
this.startIndex = indexes P(+ar#,G
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[indexes.length - 1]; k<hO9;#qpL
elseif(startIndex < 0) I~6 ;9TlQ
this.startIndex = 0; d>-EtWd
else{ z2zp c^i
this.startIndex = indexes 8~+Msn:
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[startIndex / pageSize]; M_)T=s *
} G7JZP T
} L%s""nP
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publicint getNextIndex(){ #7"5Y_0-
int nextIndex = getStartIndex() + S60`'!y
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pageSize; <W^~Y31:0
if(nextIndex >= totalCount) KePHn:c
return getStartIndex(); P#1y
else 8+|L ph`/?
return nextIndex; UzwIV{
} b4PK
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publicint getPreviousIndex(){ w2V E_
int previousIndex = getStartIndex() - }`]^LFU5
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pageSize; ?`}U|]c
if(previousIndex < 0) t\0JNi$2
return0; 9:~^KQ{?
else jzp%.4/j
return previousIndex; hlEvL
} htlWC>*
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}
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抽象业务类 Ob+c*@KiW
java代码: ]F#kM21 1
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/** %LmB`DqZ
* Created on 2005-7-12 vM8]fSc
*/
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package com.javaeye.common.business; }]@
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import java.io.Serializable; ?yh.*,dgi
import java.util.List; d|lzkY~
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import org.hibernate.Criteria; LYv2ll`XP
import org.hibernate.HibernateException; J],BO\ECH
import org.hibernate.Session; c6.|; 4
import org.hibernate.criterion.DetachedCriteria; <C(2(3
import org.hibernate.criterion.Projections; ,)8Hl[y
import Hu.d^@V
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org.springframework.orm.hibernate3.HibernateCallback; o*VQH`G*|g
import 4Qs#ws])
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org.springframework.orm.hibernate3.support.HibernateDaoS J)f?x T*
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upport; <#i'3TUR
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import com.javaeye.common.util.PaginationSupport; Jr
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public abstract class AbstractManager extends :PJjy6,1
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HibernateDaoSupport { 3f
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privateboolean cacheQueries = false; ~C3-E %h@Z
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privateString queryCacheRegion; Z_/03K$q
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publicvoid setCacheQueries(boolean =s<QN*zJB0
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cacheQueries){ 0'",4=c#V
this.cacheQueries = cacheQueries; 4`B:Mq&j
} *{Vyt5
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publicvoid setQueryCacheRegion(String 4}`MV .
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queryCacheRegion){ eyOAG4QTV
this.queryCacheRegion = &kGSxYDk%
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queryCacheRegion; -)/>qFj)
} 4l:+>U@KU
es{
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publicvoid save(finalObject entity){ ;+\;^nS3d
getHibernateTemplate().save(entity); ,KWeW^z'7
} Rp1 OC
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publicvoid persist(finalObject entity){ H.e@w3+h
getHibernateTemplate().save(entity); :.^{!
} -\vq-n
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publicvoid update(finalObject entity){ @g{
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getHibernateTemplate().update(entity); ,wjL3c
} W\/0&H\i
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publicvoid delete(finalObject entity){ X9>ujgK
getHibernateTemplate().delete(entity); Fc
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} 1RLSeT
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publicObject load(finalClass entity, lB3X1e9
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finalSerializable id){ &yuerNK
return getHibernateTemplate().load Oc1ZIIkh\
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(entity, id); lsd\ `X5,
} 1E(pJu'K
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publicObject get(finalClass entity, i*3_ivc)
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finalSerializable id){ /V^S)5r
return getHibernateTemplate().get 6%>0g^`)9Y
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(entity, id); gDH x+"?
} K4KmoGb
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publicList findAll(finalClass entity){ W c nYD)
return getHibernateTemplate().find("from CwAl-o
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} iJcl0)|
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publicList findByNamedQuery(finalString ,QDq+93
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namedQuery){ HO'
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return getHibernateTemplate W`KkuQ4cM
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().findByNamedQuery(namedQuery);
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} ,v/C-b)I
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publicList findByNamedQuery(finalString query, ^T"A9uaG
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finalObject parameter){
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return getHibernateTemplate {Su]P {oJ
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().findByNamedQuery(query, parameter); 8.@yD^'
} yy9Bd>
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publicList findByNamedQuery(finalString query, 3' ^ON
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finalObject[] parameters){ ]uP{Sj
return getHibernateTemplate R1U\ /
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().findByNamedQuery(query, parameters); H_x35|"
} bF3j* bpO"
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publicList find(finalString query){ 79&Mc,69
return getHibernateTemplate().find YO=;)RA
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(query); +_+_`q>]
} ym:JtI69
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publicList find(finalString query, finalObject r`lgK2r\
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parameter){ 8ciLzyrY*
return getHibernateTemplate().find +ISB"a
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(query, parameter); 8s|r'
} ~_K
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public PaginationSupport findPageByCriteria :D(:(`A=
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(final DetachedCriteria detachedCriteria){
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return findPageByCriteria %o~zsIl
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); 1r@v
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} }3@`'i7
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public PaginationSupport findPageByCriteria -WEiY
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(final DetachedCriteria detachedCriteria, finalint U5Rzfm4
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startIndex){ K^Xg^9
return findPageByCriteria $
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(detachedCriteria, PaginationSupport.PAGESIZE, F
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startIndex); y:1?~R
} ow+NT
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public PaginationSupport findPageByCriteria v%_sCg
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(final DetachedCriteria detachedCriteria, finalint 2t_E\W7w+
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pageSize, +1e*>jE
finalint startIndex){ g-6!+>w*>e
return(PaginationSupport) 2-2'c?%
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getHibernateTemplate().execute(new HibernateCallback(){ yp8 .\.
publicObject doInHibernate cLamqZf3
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(Session session)throws HibernateException { aX0sy\Z]j
Criteria criteria = ^E>}A
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detachedCriteria.getExecutableCriteria(session); h4sEH
int totalCount = xU)~)eK
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((Integer) criteria.setProjection(Projections.rowCount >GqIpfn
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()).uniqueResult()).intValue(); x<imMJ
criteria.setProjection d+=;sJ
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(null); W&GDE
List items = x'}{^'}/
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criteria.setFirstResult(startIndex).setMaxResults !5x"d7
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(pageSize).list(); CKj3-rcF(
PaginationSupport ps = A*W QdY
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new PaginationSupport(items, totalCount, pageSize, (Iu5QLE
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startIndex); 'tF<7\!
return ps; K&Zdk (l)
} jt?R
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}, true); cpf8f i
} ~ 5`Ngpp
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public List findAllByCriteria(final J0^p\mG
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DetachedCriteria detachedCriteria){ Bf[D&O
return(List) getHibernateTemplate GMd81@7
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().execute(new HibernateCallback(){ Ro?yCy:L'
publicObject doInHibernate 0p![&O
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(Session session)throws HibernateException { tWD*uAb
Criteria criteria = V.;0F%zks5
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detachedCriteria.getExecutableCriteria(session); Q TM+WD
return criteria.list(); }i?P(
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} JWM/np6
}, true); :Ruj;j
} jt;68SA
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public int getCountByCriteria(final {{:MJ\_"h_
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DetachedCriteria detachedCriteria){ kf^Wzp
Integer count = (Integer) E/Y.f
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getHibernateTemplate().execute(new HibernateCallback(){ 2qw~hWX
publicObject doInHibernate e(j"u;=
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(Session session)throws HibernateException { 6$2)m;| XY
Criteria criteria = p}N'>+@=
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detachedCriteria.getExecutableCriteria(session); 7-bU9{5
return Yr!<O&=
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criteria.setProjection(Projections.rowCount "!r7t4
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()).uniqueResult(); %5jxq9:K
} Ci=c"JdB
}, true); /\h&t6B1
return count.intValue(); ,NKDEcw]
} amgYr$)m
} NcRY
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用户在web层构造查询条件detachedCriteria,和可选的 dLG5yx\js
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 rQ.j$U
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PaginationSupport的实例ps。 ytr~} M%
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