Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 <Pm!#)-g9
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 0{q>'dv
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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 :< d.
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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 0'QX*xfa>
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分页支持类: V 4`
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java代码: XYh)59oM%
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package com.javaeye.common.util; ].Sz2vI
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import java.util.List; a7fFp9l!
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publicclass PaginationSupport { 44x+2@&1
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publicfinalstaticint PAGESIZE = 30; X 3dXRDB'
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privateint pageSize = PAGESIZE; V'q?+p]
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privateList items; 3n!f'" T
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privateint totalCount; ]J(BaX4
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privateint[] indexes = newint[0]; KL<,avC/
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privateint startIndex = 0; 0z
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public PaginationSupport(List items, int ?]AF?
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totalCount){ tgVMgu
setPageSize(PAGESIZE); .}c&"L;W
setTotalCount(totalCount); Uk'bOp
setItems(items); 1s _N!a
setStartIndex(0); PU2^4h/[`
} >lV'}0u)
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public PaginationSupport(List items, int Tfz_h~D
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totalCount, int startIndex){ _qO'(DKylC
setPageSize(PAGESIZE); Tpd|+60g
setTotalCount(totalCount); qI%X/'
setItems(items); Z_h-5VU-
setStartIndex(startIndex); fjd)/Gg
} =G9I7Y@
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public PaginationSupport(List items, int a_3w/9L4r
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totalCount, int pageSize, int startIndex){ W8_$]}G8E
setPageSize(pageSize); sxn{uRF
setTotalCount(totalCount); Rz#q68
setItems(items); k.ttrKy<q/
setStartIndex(startIndex); ;EB^1*AEw
} `oU|U!|
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publicList getItems(){ 0NF=7 j
return items; ZYS]Et[Q
} |JLXgwML
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publicvoid setItems(List items){ NXCvS0/h
this.items = items; %6W%-`
} {[)n<.n[g
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publicint getPageSize(){ gkmV;0
return pageSize; .]e_je_
} )`BKEaf
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publicvoid setPageSize(int pageSize){ 4:9N]1JCb
this.pageSize = pageSize; B#G:aBCM
} E1`TQA
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publicint getTotalCount(){ U38~m}c
return totalCount; :Y Ki
} +# 3e<+!F
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publicvoid setTotalCount(int totalCount){ |->CI
if(totalCount > 0){ tE#;$Ss
this.totalCount = totalCount; hXh nJ
int count = totalCount / iax0V
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pageSize; 7^7Jh&b)/
if(totalCount % pageSize > 0) ,M9e *
count++; +BVY9U?\"
indexes = newint[count]; p ,.6sk
for(int i = 0; i < count; i++){ #g/m^8n?s
indexes = pageSize * @T Ha [|(S
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} %Gl1Qi+Po_
}else{ jV[;e15+
this.totalCount = 0; iB|htH'T
} f`)*bx
} )$ h!lAo
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publicint[] getIndexes(){ JW!.+
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return indexes; fy$?~Ji&
} 2qot(Zs1i
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publicvoid setIndexes(int[] indexes){ Bf.iRh0Q5
this.indexes = indexes; dVUe!S`
} r1TdjnP,2^
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publicint getStartIndex(){ jfiUf1Mj
return startIndex; `{|w*)mD
} z-qbe97
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publicvoid setStartIndex(int startIndex){ eyuyaSE
if(totalCount <= 0) zE<Iv\Q
this.startIndex = 0; 51u\am'T
elseif(startIndex >= totalCount) $H)QUFyC
this.startIndex = indexes 9;'#,b*(
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[indexes.length - 1]; +TyN;e
elseif(startIndex < 0) DJ DQH \&
this.startIndex = 0; #N"u 0
else{ lWecxD$
this.startIndex = indexes tS>^x
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[startIndex / pageSize]; *`rfD*
} eXMIRus(
} -r_,#LR!l
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publicint getNextIndex(){ gXlcB~!
int nextIndex = getStartIndex() + x9AFN
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pageSize; cS'{h
if(nextIndex >= totalCount) zPxR=0|
return getStartIndex(); 0>8w On
else B;?)X&n|X
return nextIndex; %S"85#R5E
} tRpY+s~Fq
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publicint getPreviousIndex(){ 14"57Jt8
int previousIndex = getStartIndex() - J
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pageSize; .>eR X%
if(previousIndex < 0) "p*'HQ
return0; p #{y9s4h
else Q#G xo
return previousIndex; 'Y#'ozSQv
} m$_b\^we
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} v2 E <~/|
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抽象业务类 1C8xJ 6F
java代码: n."n?C'{
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/** y^,Q M[ &
* Created on 2005-7-12 '.1P\>x!]
*/ QM#Vl19>j(
package com.javaeye.common.business; ~f(5l.
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import java.io.Serializable; W-l+%T!
import java.util.List; xa@$cxt
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import org.hibernate.Criteria; o0]YDX@T
import org.hibernate.HibernateException; nj'5iiV`]
import org.hibernate.Session; O-X(8<~H=
import org.hibernate.criterion.DetachedCriteria; Xg96I:r'p
import org.hibernate.criterion.Projections; $Yt|XT+!&
import 0M"n
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org.springframework.orm.hibernate3.HibernateCallback; S)rr
import @b,H'WvhfS
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org.springframework.orm.hibernate3.support.HibernateDaoS `VKFA<T
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upport; U8Zb&6
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import com.javaeye.common.util.PaginationSupport; &U7v=a
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public abstract class AbstractManager extends :31_WJ^
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HibernateDaoSupport { v?OVhV
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privateboolean cacheQueries = false; ZK8)FmT_<O
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privateString queryCacheRegion; PPB/-F]rr
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publicvoid setCacheQueries(boolean x<gmDy*
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cacheQueries){ 7.hBc;%2u
this.cacheQueries = cacheQueries; 0[l}@K?
} xrPZy*Y,
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publicvoid setQueryCacheRegion(String ;[}OZt
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queryCacheRegion){ /e0B$UymFu
this.queryCacheRegion = EwzR4,r\M
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queryCacheRegion; ik(Du/
} }#FV{C]
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publicvoid save(finalObject entity){ R.rch2
getHibernateTemplate().save(entity); !FL"L
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} T]De{nH u
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publicvoid persist(finalObject entity){ <a"(B*bBd
getHibernateTemplate().save(entity); -wXeue},>
} qSvV|G
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publicvoid update(finalObject entity){ ]3O&8,
getHibernateTemplate().update(entity); r@4A%ql<
} 7%Y`j/
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publicvoid delete(finalObject entity){ [Arf!W-QG
getHibernateTemplate().delete(entity); &>zH.6%$
} YCbvCw$Ob
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publicObject load(finalClass entity, \_`qon$9
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finalSerializable id){ !zX()V
return getHibernateTemplate().load L+8ar9es
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(entity, id); L]kBY2c
} |Mb{0mKb
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publicObject get(finalClass entity, {$^'oRk
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finalSerializable id){ spV7\Gs.@
return getHibernateTemplate().get msmW2Zc
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(entity, id); mXRkR.zu+
} 4-yK!LR
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publicList findAll(finalClass entity){ x(Bt[=,K3
return getHibernateTemplate().find("from ZM.'W}J{*
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" + entity.getName()); RsZj
} sUG!dwqqd
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publicList findByNamedQuery(finalString 2`4m"D tA
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namedQuery){ [[$CtqLg
return getHibernateTemplate '#+&?6 p
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().findByNamedQuery(namedQuery); 0nb%+],pX
} [Z$H<m{c-
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publicList findByNamedQuery(finalString query, WQ9e~D"
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finalObject parameter){ VE+H! ob
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return getHibernateTemplate uV5uZ
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().findByNamedQuery(query, parameter); $:~;U xh=
} \l59/ZFan
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publicList findByNamedQuery(finalString query, q^aDZzx,z
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finalObject[] parameters){ |[.-pA^
return getHibernateTemplate 8%9 C<+.R
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().findByNamedQuery(query, parameters); dVbFMQ&
} '`2KLO>!
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publicList find(finalString query){ AQ'%}(#0
return getHibernateTemplate().find !eF(WbU0
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(query); X!]v4ma`
} 9nG^_.}|
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publicList find(finalString query, finalObject XO
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parameter){ y\skke]
return getHibernateTemplate().find "8f4s|@3
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(query, parameter); QL7b<xDQC*
} 1&dtq,|N
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public PaginationSupport findPageByCriteria 1&MCS%UTL
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(final DetachedCriteria detachedCriteria){ i;O_B5
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return findPageByCriteria hN3FH#YO
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); XFS~
} (tg.]q_=u
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public PaginationSupport findPageByCriteria +M-tYE
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(final DetachedCriteria detachedCriteria, finalint ]E/0iM5
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startIndex){ &aRL}#U
return findPageByCriteria ,jY:@<n
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(detachedCriteria, PaginationSupport.PAGESIZE, 4#IT" i
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startIndex); ]rv\sD`[
} !6(3Y
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public PaginationSupport findPageByCriteria gcA:Q4
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(final DetachedCriteria detachedCriteria, finalint "9caoPI0~
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pageSize, vG_R( ]d
finalint startIndex){ @62,.\F
return(PaginationSupport) EZ<:>V-_D
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getHibernateTemplate().execute(new HibernateCallback(){ Skt-5S#
publicObject doInHibernate wMVUTm
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(Session session)throws HibernateException {
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Criteria criteria = &>\;4E.O5
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detachedCriteria.getExecutableCriteria(session); UePkSz9EU
int totalCount = '-v:"%s|
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((Integer) criteria.setProjection(Projections.rowCount V?Jy
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()).uniqueResult()).intValue(); ^2kjO/
criteria.setProjection Rt#QW*h\|i
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(null); r
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List items = j}u L
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criteria.setFirstResult(startIndex).setMaxResults -qP)L;n
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(pageSize).list(); 5&