Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 T/Bx3VWL
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 cx_$`H
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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 DQy;W ov
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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 FdE9k\E#/)
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分页支持类: knABlU
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java代码: SrT=XX,
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package com.javaeye.common.util; z#Cgd-^7.#
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import java.util.List; KrqO7
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publicclass PaginationSupport { IuOQX}
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publicfinalstaticint PAGESIZE = 30; pcO{%]?p
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privateint pageSize = PAGESIZE; [W--%=Ou
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privateList items; ^!x}e+ o
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privateint totalCount; )A*Sl2ew
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privateint[] indexes = newint[0]; Mw{skK>b
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privateint startIndex = 0; ;o?Wn=J
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public PaginationSupport(List items, int qp`G5bw
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totalCount){ }<
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setPageSize(PAGESIZE); :}[[G2|9
setTotalCount(totalCount); =:pN82.G
setItems(items); b 1t7/q
setStartIndex(0); OJ4-p&1
} O\[Td
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public PaginationSupport(List items, int !|;w(/
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totalCount, int startIndex){ d){Al(/
setPageSize(PAGESIZE); zP;1mN
setTotalCount(totalCount); Ykt(%2L
setItems(items); $C ?G7Vs
setStartIndex(startIndex); wA>bL PTw
} sow/JLlbC
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public PaginationSupport(List items, int ||vQW\g
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totalCount, int pageSize, int startIndex){ (!&g (l;
setPageSize(pageSize); wfc[B;K\
setTotalCount(totalCount); d8T,33>T
setItems(items); DozC>
setStartIndex(startIndex); `%M}
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} q'p>__Ox
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publicList getItems(){ -hP-w>
return items; BA+:}81&<q
} )gAFz+
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publicvoid setItems(List items){ Bt^];DjH
this.items = items; )iG+pP@.@
} F ttny]
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publicint getPageSize(){ ~IE5j,SC
return pageSize; i|Y_X
} 7J%v""\1!
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publicvoid setPageSize(int pageSize){ iAlFgOk'
this.pageSize = pageSize; ]Zf@NY
} .iL_3:6f
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publicint getTotalCount(){ uPpRzp
return totalCount; {l7@<xZ??M
} cMEM}Qh
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publicvoid setTotalCount(int totalCount){ q61
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if(totalCount > 0){ Q nqU!6k@
this.totalCount = totalCount; E4'D4@\W
int count = totalCount / "Rp ]2'?
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pageSize; xIo7f
if(totalCount % pageSize > 0) ku'%+svD
count++; NW9k.D%
indexes = newint[count]; yf=ek==
for(int i = 0; i < count; i++){ GZc%*
indexes = pageSize * wz!]]EQ!o
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} [<sBnHbvQ.
}else{ !+M H?A
this.totalCount = 0; J 6S
} S@7A)
} %;zWS/JhL
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publicint[] getIndexes(){ _pNUI{De
return indexes; qgca4VV|z
} j86s[Dty
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publicvoid setIndexes(int[] indexes){ ZF;S}1
this.indexes = indexes; F,O+axO
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} \FTvN
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publicint getStartIndex(){ #IBBaxOk
return startIndex; Ok6Y'P
} KX<RD|=
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publicvoid setStartIndex(int startIndex){ cp?`\P
if(totalCount <= 0) HXdPKS4q
this.startIndex = 0; u(ZS sftat
elseif(startIndex >= totalCount) -"a+<(Y
this.startIndex = indexes XE$eHx3;
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[indexes.length - 1]; v!F(DP.)Z
elseif(startIndex < 0) jgbw'BBu
this.startIndex = 0; l.BSZhO$
else{ wKY6[ vvF
this.startIndex = indexes 2z[Pw0#V
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[startIndex / pageSize]; :`
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} }UGPEf\
} !Q7
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publicint getNextIndex(){ D}"GrY5
int nextIndex = getStartIndex() + }(tGjx]
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pageSize; WejY
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if(nextIndex >= totalCount) +&?VA!}.
return getStartIndex(); 2%8N<GW.F
else wqGZkFg1
return nextIndex; R9CAw>s
} 5e2mEQU>
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publicint getPreviousIndex(){ H1?1mH
int previousIndex = getStartIndex() - >Le
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pageSize; . t3@86xTJ
if(previousIndex < 0) D!mhR?t
return0; THua?,oyW
else d=5D 9'+
return previousIndex; _>`0!mG
} hsE!3[[
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} 0"QE,pLe4
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抽象业务类 u51/B:+
java代码: F@I_sGCcb
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/** ]t=>#
* Created on 2005-7-12 ,H%\+yn{
*/ eP2 y U
package com.javaeye.common.business; 3|?fGT;P
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import java.io.Serializable; };+s0:H
import java.util.List; DuE>KX{<!R
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import org.hibernate.Criteria; M)xK+f2_[
import org.hibernate.HibernateException; fBF}-{VX(
import org.hibernate.Session; ='JX_U`A^F
import org.hibernate.criterion.DetachedCriteria; H{XW?O^@
import org.hibernate.criterion.Projections; }"8_$VDcz
import TB[vpTC9)
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org.springframework.orm.hibernate3.HibernateCallback; /0c&!OP
import ?~K2&eo
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org.springframework.orm.hibernate3.support.HibernateDaoS ]@P*&FRcZ
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upport; ` WB|h)Y
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import com.javaeye.common.util.PaginationSupport; zXD@M{
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public abstract class AbstractManager extends JU@$(
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HibernateDaoSupport { 3pp
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privateboolean cacheQueries = false; 'KL(A-}!
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privateString queryCacheRegion; %FU[j^
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publicvoid setCacheQueries(boolean HA%ye"(y8
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cacheQueries){ @}gdOaw
this.cacheQueries = cacheQueries; ;x#>J +QlG
} {<2ZbN?
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publicvoid setQueryCacheRegion(String wj^I1;lO
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queryCacheRegion){ @\y7
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this.queryCacheRegion = K9 q~Vf
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queryCacheRegion; 2z\F m/Z.
} vFOv
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publicvoid save(finalObject entity){ ?5Fj]Bk]
getHibernateTemplate().save(entity); zEW:Xe)
} _iu|*h1y
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publicvoid persist(finalObject entity){ N:: ;J
getHibernateTemplate().save(entity); OK\%cq/U
} )9r%% #
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publicvoid update(finalObject entity){ qt(:bEr^6b
getHibernateTemplate().update(entity); )US/bC!M$
} j,xPN=+hT
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publicvoid delete(finalObject entity){ =T)2wcXBB
getHibernateTemplate().delete(entity); <.b$
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} 0UJ`<Bfd
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publicObject load(finalClass entity, CD_f[u
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finalSerializable id){ 4E>(Y98
return getHibernateTemplate().load Rda1X~-g
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(entity, id); I_G>W3
} b3xkJ&Z
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publicObject get(finalClass entity, EcoUpiL%2
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finalSerializable id){ o:8S$F`O@
return getHibernateTemplate().get 8EG8!,\I
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(entity, id); #IaBl?}r^
} n,jE#Z.D
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publicList findAll(finalClass entity){ fsJTwSI["
return getHibernateTemplate().find("from 5u)^FIBj
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" + entity.getName()); RO$@>vL
} '%-xe3
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publicList findByNamedQuery(finalString )SL@>Cij
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namedQuery){ xUo)_P\_
return getHibernateTemplate +z(,A
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().findByNamedQuery(namedQuery); \e:FmG
} O3C)N
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publicList findByNamedQuery(finalString query, I"cQ5gF?A
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finalObject parameter){ =!S@tuY
return getHibernateTemplate h`EH~ W0:z
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().findByNamedQuery(query, parameter); 0(9I\j5`TT
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publicList findByNamedQuery(finalString query, c;21i;&,9
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finalObject[] parameters){ R5NRCI
return getHibernateTemplate yToT7 X7F7
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().findByNamedQuery(query, parameters); h2/dhp
} #>E3' 5b
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publicList find(finalString query){ lNh=>DPu
return getHibernateTemplate().find p9&gEW
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(query); dEQReD
} #"o6OEy$A#
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publicList find(finalString query, finalObject ~b>nCP8q
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parameter){ }P&1s,S8J#
return getHibernateTemplate().find c?p0#3%L#
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(query, parameter); ^^4K/XBve
} e-%7F]e
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public PaginationSupport findPageByCriteria vu_>U({.
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(final DetachedCriteria detachedCriteria){ xP{HjONu
return findPageByCriteria ?8wwd!)x%
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); A=v lC?&Z
} .\ ;l-U
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public PaginationSupport findPageByCriteria a2cx
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(final DetachedCriteria detachedCriteria, finalint B&%L`v2[
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startIndex){ ;e#>n!<u
return findPageByCriteria $I)Tk`=
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(detachedCriteria, PaginationSupport.PAGESIZE, oglXW8
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startIndex); hV3,^#9o
} dJdD"xj
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public PaginationSupport findPageByCriteria i63`B+L{
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(final DetachedCriteria detachedCriteria, finalint ^w;o \G
}
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pageSize, -,K*~z.l
finalint startIndex){ ^G|w8t+^
return(PaginationSupport) @K,2mhE~h
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getHibernateTemplate().execute(new HibernateCallback(){ a^RZsR
publicObject doInHibernate 652u Z};e
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(Session session)throws HibernateException { %-h7Z3YcN
Criteria criteria = k9*J*7l-m
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detachedCriteria.getExecutableCriteria(session); QE7+rBa
int totalCount = B8bvp:Ho|
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((Integer) criteria.setProjection(Projections.rowCount KW&nDu