Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 b
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 |H}m 4-+*
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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 PYRd]%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 KfCoe[Vv
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分页支持类: $QEilf;E
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java代码: Z+`{ 7G?4m
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package com.javaeye.common.util; V}o n|A
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import java.util.List; ^taBG3P
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publicclass PaginationSupport { ,vqr<H9e
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publicfinalstaticint PAGESIZE = 30; v4miU;|\
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privateint pageSize = PAGESIZE; E@05e
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privateList items; ./j,Z$|
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privateint totalCount; o'~5pS(wq
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privateint[] indexes = newint[0]; g[>\4B9t
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privateint startIndex = 0; "N:XzG
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public PaginationSupport(List items, int O|A_PyW
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totalCount){ BG^C9*ZuP
setPageSize(PAGESIZE); {y] mk?j
setTotalCount(totalCount); X7UuwIIP
setItems(items); e7fiGl
setStartIndex(0); 3($"q]Y
} %u^JpC{E
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public PaginationSupport(List items, int G'zF)0oD
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totalCount, int startIndex){ qQi.?<d2"s
setPageSize(PAGESIZE); thO ~=RB
setTotalCount(totalCount); Ko&hj XHx
setItems(items); !}\4utHY
setStartIndex(startIndex); /<CSVJ_r
} ^[Ua46/" m
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public PaginationSupport(List items, int FEPXuCb
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totalCount, int pageSize, int startIndex){ 04%S+y.6&Y
setPageSize(pageSize); p2J|Hl|
setTotalCount(totalCount); UY2X
setItems(items); $wYtyN[
setStartIndex(startIndex); {Y}dv`G#Iu
} aw?=hXR!
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publicList getItems(){ o]{uc,
return items; PN~@
} S.B<pjgt
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publicvoid setItems(List items){ t:JI!DR
this.items = items; {ng"=3+n
} zJM S=r
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publicint getPageSize(){ j`
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return pageSize; sC00un%
} 2M)]!lYy
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publicvoid setPageSize(int pageSize){ Obw?_@X
this.pageSize = pageSize; T9 <2A1
} wiOgyMdx
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publicint getTotalCount(){ !@u>A_
return totalCount; _ 46X%k
} +,:^5{9{
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publicvoid setTotalCount(int totalCount){ *xf ._~E
if(totalCount > 0){ ~zm7?_"@]
this.totalCount = totalCount; 6m .k;'
int count = totalCount / t3Z_Dp~\
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pageSize; SUWD]k >PH
if(totalCount % pageSize > 0) -K(fh#<6KO
count++; O 2{)WWOT
indexes = newint[count]; ""O"
for(int i = 0; i < count; i++){ JB</euyV
indexes = pageSize * nfb]VN~(
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} Bhqft;Nuh
}else{ UH@as
this.totalCount = 0; 2:}fe}
} QQk{\PV
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publicint[] getIndexes(){ \&V0vN1
return indexes; c~A4gtB=
} "HD+rmUEH
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publicvoid setIndexes(int[] indexes){ {qKxz9.y
this.indexes = indexes; eRbGZYrJ
} ^n#1<K[E
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publicint getStartIndex(){ s/"&9F3
return startIndex; Zn:R
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} y`e4;*1
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publicvoid setStartIndex(int startIndex){ A]`El8_t"
if(totalCount <= 0) })vOaYT|-
this.startIndex = 0; !.7udYmB
elseif(startIndex >= totalCount) D0Z\Vvy
this.startIndex = indexes He0=-AR8
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[indexes.length - 1]; ]"AyAkT(
elseif(startIndex < 0) QVZD/shq
this.startIndex = 0; d
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else{ @Un/c:n
this.startIndex = indexes r#WT`pav
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[startIndex / pageSize]; HLQ"?OFlz
} w&Dv8Wv+Oq
} ?&WYjTU]H
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publicint getNextIndex(){ LW#M@
int nextIndex = getStartIndex() + SEQ%'E5-'
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pageSize; 50jOA#l[
if(nextIndex >= totalCount) ArLvz5WV
return getStartIndex(); sKLX [l
else Vi!Q
return nextIndex; Xog/O i
} Jsg
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publicint getPreviousIndex(){ 5yh/0i5 |
int previousIndex = getStartIndex() - \^+ILYO:$
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pageSize; ocwG7J\W
if(previousIndex < 0) N5|Rmfo1
return0; y;"
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else 7>o.0
return previousIndex; y#ON|c
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} pl*~kG=
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} z
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抽象业务类 O@8pC+#`Z
java代码: 7k{2Upg;
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/** b yg0.+e0
* Created on 2005-7-12 Gtv,Izt
*/ RR1A65B
package com.javaeye.common.business; J}spiVM
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import java.io.Serializable; @54*.q$
import java.util.List; CDMfa&;T
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import org.hibernate.Criteria; 3K/Df#
import org.hibernate.HibernateException; ske@uzAz
import org.hibernate.Session; :L?_Y/K
import org.hibernate.criterion.DetachedCriteria; cl[!`Z
import org.hibernate.criterion.Projections; @}F Awv^f
import L/}iy}
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org.springframework.orm.hibernate3.HibernateCallback; k@!r#`j3
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org.springframework.orm.hibernate3.support.HibernateDaoS \jW)Xy
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upport; hi{%pi&!T
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import com.javaeye.common.util.PaginationSupport; T~4mQuYi
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public abstract class AbstractManager extends L6:h.1 U$
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HibernateDaoSupport { ,1n
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privateboolean cacheQueries = false; 2f, B$-#
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privateString queryCacheRegion; 4k}e28
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publicvoid setCacheQueries(boolean $FM'
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cacheQueries){ 7l8[xV
this.cacheQueries = cacheQueries; BW[5o3
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} =y ]Jl,_.
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publicvoid setQueryCacheRegion(String Ry;$^.7%
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queryCacheRegion){ V%L/8Q~
this.queryCacheRegion = g1m-+a
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queryCacheRegion; sPYX~G&T
}
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publicvoid save(finalObject entity){ =fLL|
getHibernateTemplate().save(entity); @98;VWY\
} H>7dND2;
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publicvoid persist(finalObject entity){ ,krS-.
getHibernateTemplate().save(entity); ND]S(C"?
} "Tbnxx]J
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publicvoid update(finalObject entity){ tn<6:@T
getHibernateTemplate().update(entity); 7Ur?ep
} $N+6h#
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publicvoid delete(finalObject entity){ ,TC~~EWq
getHibernateTemplate().delete(entity); y>o>WN<q
} $%qg"
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publicObject load(finalClass entity, :xeLt;
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finalSerializable id){ 9w^zY;Y
return getHibernateTemplate().load - V) R<
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(entity, id); =G>(~+EA
} &~~s6
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publicObject get(finalClass entity, -e>|kPfv!
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finalSerializable id){ +cg
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return getHibernateTemplate().get tB6k|cPC
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(entity, id); 8[5|_Eh+
} Lyoor1
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publicList findAll(finalClass entity){ Bku'H
return getHibernateTemplate().find("from hw,^G5m
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" + entity.getName()); }C6@c1myq-
} Q7Ij4
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publicList findByNamedQuery(finalString Q_P5MLU>
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namedQuery){ H^(L90
return getHibernateTemplate v[#)GB
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().findByNamedQuery(namedQuery); D1"7s,Hmu
} /8e W@IO.F
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publicList findByNamedQuery(finalString query, vjK, I9
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finalObject parameter){ vA?_-. J
return getHibernateTemplate n6f3H\/P&
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().findByNamedQuery(query, parameter); f'{>AKi=C
} 'h*Zc}Q:
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publicList findByNamedQuery(finalString query, 'DAltr<
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finalObject[] parameters){ ki4f*Ej
return getHibernateTemplate B=zMYi
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().findByNamedQuery(query, parameters); nR'#s%Kj
} 'j79GC0
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publicList find(finalString query){ c^S&F9/U*
return getHibernateTemplate().find |9s wZ[
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(query); nFXAF!,jj
} epVH.u%
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publicList find(finalString query, finalObject 8~5|KO >F
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parameter){ XZO<dhZX:
return getHibernateTemplate().find G[6=u|(M
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(query, parameter); *Mi6
}
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public PaginationSupport findPageByCriteria )73DT3-0$
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(final DetachedCriteria detachedCriteria){ WEC-<fN|Y\
return findPageByCriteria |h,FUj<r
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); A?Sm-#n{
} faVS2TN4
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public PaginationSupport findPageByCriteria ` u=<c
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(final DetachedCriteria detachedCriteria, finalint F*<Ws;j
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startIndex){ l$`G:%qHj
return findPageByCriteria Q-Y@)Mf~?0
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(detachedCriteria, PaginationSupport.PAGESIZE, Qa?QbHc
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startIndex); ;U7t
} )/TVJAJ
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public PaginationSupport findPageByCriteria M,{<TpCx
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(final DetachedCriteria detachedCriteria, finalint oZvG3_H4.
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pageSize, 6SAQDE
finalint startIndex){ [NR1d-Wg
return(PaginationSupport) }2xb&6g~o
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getHibernateTemplate().execute(new HibernateCallback(){ Ja=N@&Z#
publicObject doInHibernate h>Rpb#]
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(Session session)throws HibernateException { HjPH
Criteria criteria = fW[.r== Kf
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detachedCriteria.getExecutableCriteria(session); 8 )`5P\
int totalCount = #ZwY?T
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((Integer) criteria.setProjection(Projections.rowCount V,'FlU
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()).uniqueResult()).intValue(); EM~7#Y
criteria.setProjection B2"+Hwbk
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(null); iy9VruT<