Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 j;Z
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 e{:
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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 ~HctXe' x
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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 7x*L 1>[`'
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分页支持类: n`Ypv{+ {%
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java代码: <Rt0
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package com.javaeye.common.util; V2Z^W^
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import java.util.List; nCldH|>5w
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publicclass PaginationSupport { uL-$^],
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publicfinalstaticint PAGESIZE = 30; LNgFk%EH
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privateint pageSize = PAGESIZE; en MHKN g
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privateList items; voN, u>U
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privateint totalCount; T.!.3B$@]
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privateint[] indexes = newint[0]; `?N|{kb
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privateint startIndex = 0; %F*h}i
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public PaginationSupport(List items, int X)Rh&ui
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totalCount){ &53LJlL
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setPageSize(PAGESIZE); G*VcAJ[
setTotalCount(totalCount); E-rGOm" m
setItems(items); =HoA2,R)
setStartIndex(0); b<g9L4s
} h>NuQo*
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public PaginationSupport(List items, int ]T<RC\o
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totalCount, int startIndex){ g dBH\K (\
setPageSize(PAGESIZE); 0Q/BTT%X
setTotalCount(totalCount); uY)|
setItems(items); JOq&(AZe
setStartIndex(startIndex); dqL)q 3
} grCz@i
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public PaginationSupport(List items, int o
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totalCount, int pageSize, int startIndex){ ma2-66M~j
setPageSize(pageSize); _nW#Cl~
setTotalCount(totalCount); LwCf}4u"
setItems(items); _K>YB>W}7
setStartIndex(startIndex); PwxRu
} "IdN *K
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publicList getItems(){ gM#]o QOGE
return items; Xpf:I
} X04JQLhy"
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publicvoid setItems(List items){ yFqB2(Dv
this.items = items; mvW,nM1Y
} ,
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publicint getPageSize(){ jTz~
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return pageSize; X[iQ%Y$/n
} .{#J2}+[_}
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publicvoid setPageSize(int pageSize){ y[:xGf]8@
this.pageSize = pageSize; #ruL+-8!<
} +,ZQ(
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publicint getTotalCount(){ )1!*N)$
return totalCount; 1O;q|p'9
} |lf,3/*jDB
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publicvoid setTotalCount(int totalCount){ k|
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if(totalCount > 0){ #ANbhHG
this.totalCount = totalCount; +dSO?Y]
int count = totalCount / Xkb\fR6<K
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pageSize; `GT{=XJfY
if(totalCount % pageSize > 0) L(qQ,1VY
count++; (E?X@d iu
indexes = newint[count]; 3,-xk!W$L
for(int i = 0; i < count; i++){ jG&gd<^
indexes = pageSize * 2_Otv2
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} qUtlh,4)
}else{ 7^Q4?(A
this.totalCount = 0; c'~6 1HA<
} p!3!&{
} Vq<\ixRi
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publicint[] getIndexes(){ 0T7""^'&
return indexes; BO)Q$*G~JD
} ify}xv
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publicvoid setIndexes(int[] indexes){ z#elwL6
this.indexes = indexes; _"0Bg3Y
} +(3U_]Lu
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publicint getStartIndex(){ $4a;R I
return startIndex; u'+;/8
} 6#/v:;bF
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publicvoid setStartIndex(int startIndex){ W #kOcw
if(totalCount <= 0) R<n'v.~"A
this.startIndex = 0; xF8^#J6>
elseif(startIndex >= totalCount) 0'0GAh2
this.startIndex = indexes jou741
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[indexes.length - 1]; i@p0Jnh|
elseif(startIndex < 0) Wc
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this.startIndex = 0;
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else{ wXnluE
this.startIndex = indexes <*55d2
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[startIndex / pageSize]; ii:E>O(0B
} ;XXB^,
} #?EmC]N7
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publicint getNextIndex(){ m]#oZVngy
int nextIndex = getStartIndex() + Tweku}D7
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pageSize; (TJ )Y7E
if(nextIndex >= totalCount) zo~5(O@
return getStartIndex(); Y(3X5v?[
else ^TF71uo
return nextIndex; =9AX\2w*H;
} soXIPf
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publicint getPreviousIndex(){ hYS}PE
int previousIndex = getStartIndex() - (B:+md\Q
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pageSize; sw^4h`^'
if(previousIndex < 0) 9#X"m,SB
return0; \=NS@_t,
else {N2MskK
return previousIndex; 84}Pu%
} 78fFAN`
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} T@)|0M
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抽象业务类 kI|7o>}<
java代码: /pS Y ~*
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/** EYD24
* Created on 2005-7-12 r(VznKSx
*/ >j$y@"+
package com.javaeye.common.business; -L&%,%
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import java.io.Serializable; iu+r=sp
import java.util.List; r#X6jU
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import org.hibernate.Criteria; AkE(I16Uy~
import org.hibernate.HibernateException; bs9X4n5
import org.hibernate.Session; +9!=pRq
import org.hibernate.criterion.DetachedCriteria; Cl>{vSN
import org.hibernate.criterion.Projections; j}fu|-
import {\62c;.
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org.springframework.orm.hibernate3.HibernateCallback; o/~Rf1
import -b`O"Ck*
d,d ohi
org.springframework.orm.hibernate3.support.HibernateDaoS {|D7H=f
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upport; lzDA0MPI:
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import com.javaeye.common.util.PaginationSupport; VY|'7in"M
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public abstract class AbstractManager extends x=%wPVJ
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HibernateDaoSupport { |Jpi|'
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privateboolean cacheQueries = false; w1J%%//(h
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privateString queryCacheRegion; V+Y;
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publicvoid setCacheQueries(boolean ;:A/WU.^
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cacheQueries){ .TpM3b#r
this.cacheQueries = cacheQueries; /=IBK`
} jH~VjE>
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publicvoid setQueryCacheRegion(String H05xt$J
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queryCacheRegion){ DT#F?@LG(
this.queryCacheRegion = m:x<maP#E
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queryCacheRegion; z=1N}l~|*
} Zv&<r+<g
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publicvoid save(finalObject entity){ jWNF3\
getHibernateTemplate().save(entity); &r0U9J
} M>g%wg7Ah
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publicvoid persist(finalObject entity){ ~A$y-Dt'
getHibernateTemplate().save(entity); ~;/}D0k$x
} ^={s(B2
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publicvoid update(finalObject entity){ PDNbhUAV
getHibernateTemplate().update(entity); 4RyQ^vL
} >1S39n5z.
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publicvoid delete(finalObject entity){ we}G%09L
getHibernateTemplate().delete(entity); N SkIzaNY
} uG,*m'x']
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publicObject load(finalClass entity, _?rL7oTv
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finalSerializable id){ He)vl.
return getHibernateTemplate().load 9gQ
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(entity, id); Pe?=M[u2
} 7;r Jr&.)
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publicObject get(finalClass entity, "rU
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finalSerializable id){ V_"UiN"o
return getHibernateTemplate().get !Y^3% B%
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(entity, id); NnTAKd8
} 88g|(k/
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publicList findAll(finalClass entity){ `/RcE.5n\@
return getHibernateTemplate().find("from F~;UD<<"H
":W$$w<
" + entity.getName()); x.kIzI5
} d<_#Q7]I4
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publicList findByNamedQuery(finalString _>RTefL5
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namedQuery){ |] cFsB#G
return getHibernateTemplate 0'zX6%
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().findByNamedQuery(namedQuery); KvY1bMU!
} *|Bt!
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publicList findByNamedQuery(finalString query, Z# o;H$
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finalObject parameter){ wn/Y5
return getHibernateTemplate gn)>(MG
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().findByNamedQuery(query, parameter); 5fY7[{2
} SL5QhP
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publicList findByNamedQuery(finalString query, 4 zhg#
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finalObject[] parameters){ +<rWYF(ii/
return getHibernateTemplate * _@t$W
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().findByNamedQuery(query, parameters); 1+v!)Y>Z&
} bwyj[:6l
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publicList find(finalString query){ uy rS6e0
return getHibernateTemplate().find w^E$R
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(query); RxO!h8
} QE4TvnhK
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publicList find(finalString query, finalObject H6Q!~o\"H
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parameter){ WPDi)UX
return getHibernateTemplate().find ;D|g5$OE&
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(query, parameter); LO@o`JF
} bzyy;`;6Q~
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public PaginationSupport findPageByCriteria XCj8QM.o
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(final DetachedCriteria detachedCriteria){ Wa<SYJ
return findPageByCriteria Lk2;\ D>
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); qQp;i{X
} bY}:!aR<mK
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public PaginationSupport findPageByCriteria o:PdPuZVR
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(final DetachedCriteria detachedCriteria, finalint M,dp;
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startIndex){ a\*_b2 ^n
return findPageByCriteria (d*~Qpi{7
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(detachedCriteria, PaginationSupport.PAGESIZE, 1 Szv4
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startIndex); guk{3<d:Jy
} R 6
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public PaginationSupport findPageByCriteria ~S~4pK
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(final DetachedCriteria detachedCriteria, finalint S!8q>d,%L
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pageSize, UO4z~
finalint startIndex){ #n.XOet<\
return(PaginationSupport) )St`}qu;
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getHibernateTemplate().execute(new HibernateCallback(){ Dd'J"|jF38
publicObject doInHibernate ^\g?uH6k U
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(Session session)throws HibernateException { &0RKNpwg
Criteria criteria = .f9&.H#
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detachedCriteria.getExecutableCriteria(session); `%_(_%K
int totalCount = ?/}-&A"
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((Integer) criteria.setProjection(Projections.rowCount @*=eqO
(05a9
()).uniqueResult()).intValue(); mbXW$E-&R2
criteria.setProjection [z,6 K=
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(null); K'oy6$B
List items = e]@
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criteria.setFirstResult(startIndex).setMaxResults jIjW +D`
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(pageSize).list(); ;8g[y"I
PaginationSupport ps = 2#X>^LH
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new PaginationSupport(items, totalCount, pageSize, G2w0r,[
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startIndex); 4VP$,|a
return ps; .5!Q(
} FW:V<{f
}, true); ."j=s#OC(
} (97&mhs3
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public List findAllByCriteria(final ^K0oJg.E
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DetachedCriteria detachedCriteria){ _-z;
return(List) getHibernateTemplate WO=P~F<