Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 R%B"Gtl)
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 ~7a(KJgvd"
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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 zG)XB*c
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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 g#b[-)Qx
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分页支持类: )*<=:
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java代码: rS1mBrqD
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package com.javaeye.common.util; ZuF"GNUC
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import java.util.List; 4JF)w;X}
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publicclass PaginationSupport { @n<y[WA
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publicfinalstaticint PAGESIZE = 30; /'vCO
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privateint pageSize = PAGESIZE; zzmZ`Ya
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privateList items; f%r0K6p
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privateint totalCount; \GA6;6%Oo
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privateint[] indexes = newint[0]; FnkB
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privateint startIndex = 0; 8z,i/:
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public PaginationSupport(List items, int +bC-_xGuh
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totalCount){ nT
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setPageSize(PAGESIZE); `>M;f%s
setTotalCount(totalCount); !YUMAp/
setItems(items); -"*UICd
setStartIndex(0); 0Vu&UD
} 7PE3>cD
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public PaginationSupport(List items, int }~gBnq_DDU
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totalCount, int startIndex){ 2Eq?^ )s
setPageSize(PAGESIZE); Bl,rvk2
setTotalCount(totalCount); \)H}
setItems(items); o80?B~o
setStartIndex(startIndex); I_vPGafMx
} N^,@s"g
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public PaginationSupport(List items, int $|0_[~0-n
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totalCount, int pageSize, int startIndex){ 5HWVK .
setPageSize(pageSize); [Yt!uhww
setTotalCount(totalCount); <hG=0Zc r
setItems(items); Q_p!;3
setStartIndex(startIndex); hVvPI1[2
} !@ERAPuk
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publicList getItems(){ 8)(<U/
return items; e_Cns&
} wSrq?U5q
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publicvoid setItems(List items){ [X >sG)0S~
this.items = items; Rg/*)SKj
} QBi&Q%p iy
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publicint getPageSize(){ &[]0yNG
return pageSize; 7"L`|O?8)
} 3:q\]]]S
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publicvoid setPageSize(int pageSize){ KEfn$\
this.pageSize = pageSize; Q4YIKNN|7
} lYZ5FacqC
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publicint getTotalCount(){ vo'=d"zm
return totalCount; 7nh,j <~;2
} $`J'Y>`
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publicvoid setTotalCount(int totalCount){ &p\fdR4e
if(totalCount > 0){ zbL!q_wO
this.totalCount = totalCount; z"`q-R }m
int count = totalCount / k0;N D
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pageSize; XY(3!>/eQ[
if(totalCount % pageSize > 0) 3q*y~5&I
count++; j(j o8
indexes = newint[count]; 7%aaqQ1T
for(int i = 0; i < count; i++){ vRm.#+Td
indexes = pageSize * 'qRK6}"T
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} !2dA8b
}else{ hr%O 4&sa
this.totalCount = 0; oObm5e*Z
} p1B~:9y9X
} xFZA18
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publicint[] getIndexes(){ &V;^xMO!
return indexes; d/>owCwQ
} Y)@mL~){
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publicvoid setIndexes(int[] indexes){ p7b`Z>}
this.indexes = indexes; <{rRcFR
} l#P)9$%
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publicint getStartIndex(){ x \qS|q\N
return startIndex; &
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} MB423{j
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publicvoid setStartIndex(int startIndex){ w,L P M+
if(totalCount <= 0) 5m,{?M`
this.startIndex = 0; ?haN ;n6'
elseif(startIndex >= totalCount) e(/~;"r{
this.startIndex = indexes [jl'5l d
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[indexes.length - 1]; j-2`yR
elseif(startIndex < 0) Lq@pJ)a
this.startIndex = 0; 1(C3;qlVD
else{ _RG!lmJV
this.startIndex = indexes zNT~-
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[startIndex / pageSize]; g+8j$w}
} 'LZF^m _<<
} uSSnr#i^j
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publicint getNextIndex(){ fu|N{$h%X
int nextIndex = getStartIndex() + h4CDZ
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pageSize; ,<$6-3sC-
if(nextIndex >= totalCount) 8U!;
return getStartIndex(); t59"[kQ
else iq$edq[
return nextIndex; eCB(!Y|
} V6l*!R
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publicint getPreviousIndex(){ =G9%Hz5~:
int previousIndex = getStartIndex() - O@[c*3]e
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pageSize; BCV<( @c
if(previousIndex < 0) /sY(/ JE
return0; CC1\0$ /
else QC.WR'.
return previousIndex; IuDg-M[
} %&KJtKe
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} (j8tdEt
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抽象业务类 P9Hv){z
java代码: Izq]nR
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/** v0!>":
* Created on 2005-7-12 DX.u"&Mm
*/ dq%N,1.F
package com.javaeye.common.business; ?&Si P-G
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import java.io.Serializable; T[M?:~
import java.util.List; X}'3N'cbkU
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import org.hibernate.Criteria; $Tu%dE(OF
import org.hibernate.HibernateException; v'*
import org.hibernate.Session; u2K{3+r`'
import org.hibernate.criterion.DetachedCriteria; P<GY"W+rR
import org.hibernate.criterion.Projections; b)@%gS\F
import }xTTz,Oj$
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org.springframework.orm.hibernate3.HibernateCallback; .!0),KmkK
import aNb=gjLpt
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org.springframework.orm.hibernate3.support.HibernateDaoS qF=D,Dlz
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upport; s]`&9{=E
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import com.javaeye.common.util.PaginationSupport; *A2J[,?c
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public abstract class AbstractManager extends e/lfT?J\
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HibernateDaoSupport { _Hi;Y
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privateboolean cacheQueries = false; `g6XVa*%#
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privateString queryCacheRegion; L?&+*|VxI
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publicvoid setCacheQueries(boolean wxpD{P
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cacheQueries){ E-_)w
this.cacheQueries = cacheQueries; 3;~1rw=$<
} DbJ:KQ!*
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publicvoid setQueryCacheRegion(String %1SA!1>j
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queryCacheRegion){ rxC EOG
this.queryCacheRegion = )v;>6(
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queryCacheRegion; k(<5tv d
} w{)*'8oCB
}
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publicvoid save(finalObject entity){ AuHOdiJ
getHibernateTemplate().save(entity); )5gcLD/zI
} jVL<7@_*
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publicvoid persist(finalObject entity){ OP]=MZP|
getHibernateTemplate().save(entity); im9 B=D
} ^ $Q',
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publicvoid update(finalObject entity){ 'VFxg,
getHibernateTemplate().update(entity); ma@ws,H
} 5 g99t$p9
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publicvoid delete(finalObject entity){ -VD[iH
getHibernateTemplate().delete(entity); En8-Hc#NC
} Fzh%#z0
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publicObject load(finalClass entity, P~redX=t@
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finalSerializable id){ .3qaaXeH
return getHibernateTemplate().load yk!,{Q?<$
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(entity, id); gg'lb{oG
} Sd'
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publicObject get(finalClass entity, |!8[Vg^Wh
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finalSerializable id){ .
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return getHibernateTemplate().get ;4 R1
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(entity, id); =+~e44!~D
} Z}f$KWj
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publicList findAll(finalClass entity){ 4LtFv)i
return getHibernateTemplate().find("from v~q2D"
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" + entity.getName()); !EF~I8d\]
} s6OnHX\it7
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publicList findByNamedQuery(finalString /tc*jXB
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namedQuery){ lDe9(5|)Q
return getHibernateTemplate Wd_bDZQ
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().findByNamedQuery(namedQuery); {#:js
} wg^#S
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publicList findByNamedQuery(finalString query, ]7O)iq%
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finalObject parameter){ apa~Is1
return getHibernateTemplate djS?$WBpU
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().findByNamedQuery(query, parameter); ~KDx
} `^9 Zbwq
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publicList findByNamedQuery(finalString query, YM
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finalObject[] parameters){ yAU[A
return getHibernateTemplate m/|>4~
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().findByNamedQuery(query, parameters); |]RV[S3v
} ^-w:D
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publicList find(finalString query){ r7c(/P^$G
return getHibernateTemplate().find -\6tVF11z
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(query); }5RfY| ;
} 24:;vcb
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publicList find(finalString query, finalObject ve.iyr
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parameter){ A,W-=TC
return getHibernateTemplate().find H;k;%Zg;
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(query, parameter); H4Ca+;
} Lt8chNi
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public PaginationSupport findPageByCriteria T [N:X0
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(final DetachedCriteria detachedCriteria){ =%znY`0b56
return findPageByCriteria E8T4Nh_
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); /wK5YN.em
} $yIcut7
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public PaginationSupport findPageByCriteria TYw0#ZXo
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(final DetachedCriteria detachedCriteria, finalint }9R45h}{<
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startIndex){ (zWzF_v
return findPageByCriteria Cnd*%C PZ
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(detachedCriteria, PaginationSupport.PAGESIZE, jZ7/p ^c5R
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startIndex); 9xB^dKM3
} e!l!T@
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public PaginationSupport findPageByCriteria ?Mp~^sgp'
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(final DetachedCriteria detachedCriteria, finalint {0lY\#qcE
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pageSize, HPCzh
finalint startIndex){ }zj w\
return(PaginationSupport) #-'=)l}i1A
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getHibernateTemplate().execute(new HibernateCallback(){ A]Zp1XEG
publicObject doInHibernate h.%VWsAO7
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(Session session)throws HibernateException { <.HHV91
Criteria criteria = si/F\NDT
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detachedCriteria.getExecutableCriteria(session); uwj/]#`
int totalCount = NO
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((Integer) criteria.setProjection(Projections.rowCount ~{n_rKYV
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()).uniqueResult()).intValue(); ; QR|v
criteria.setProjection b*nytF
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(null); ""^9WLH4g-
List items = dg4"4\c*P
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criteria.setFirstResult(startIndex).setMaxResults 8!TbJVR
,4NvD2Y
(pageSize).list(); BtBo%t&
PaginationSupport ps = 2
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new PaginationSupport(items, totalCount, pageSize, LOX[h$
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startIndex); T?) U|
return ps; zr&K0a{hc
} zf$OC}|\w
}, true); Wv77ef
} <.l5>mgkCw
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public List findAllByCriteria(final 'an{<82i
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DetachedCriteria detachedCriteria){ m,K\e
return(List) getHibernateTemplate 3_fLafA
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().execute(new HibernateCallback(){ "3Dvc7V
publicObject doInHibernate -gu)d5b
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(Session session)throws HibernateException { \&R