Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 )%SkJ
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 }pk#!N
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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 E ca\fkj
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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 ;U1UFqZ`
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分页支持类: tt%MoQ)
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java代码: _,;j7%j
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package com.javaeye.common.util; j-CnT)W<
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import java.util.List; VIP7OHJh
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publicclass PaginationSupport { B!gGK|8
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publicfinalstaticint PAGESIZE = 30; ELh8ltLY
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privateint pageSize = PAGESIZE; y%sroI('y
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privateList items; UA[,2MBp
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privateint totalCount; 9Rm/V5
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privateint[] indexes = newint[0]; =n^!VXaL]]
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privateint startIndex = 0; g}laG8
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public PaginationSupport(List items, int Oz|K8p
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totalCount){ >0{S
setPageSize(PAGESIZE); 7&KT0a*
setTotalCount(totalCount); v+jsC`m
setItems(items); >7!6nF3x,
setStartIndex(0); kc/{[ME
} LlBN-9p
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public PaginationSupport(List items, int {]z4k[;.h
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totalCount, int startIndex){ /(O$(35
setPageSize(PAGESIZE); gPAX4'
setTotalCount(totalCount); [2ax>Yk$
setItems(items); h^
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setStartIndex(startIndex); +(uYwdcN
} F}"] 92
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public PaginationSupport(List items, int Qb8KPpd
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totalCount, int pageSize, int startIndex){ H+
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setPageSize(pageSize); B?$ "\;&
setTotalCount(totalCount); 7bxA]s{m
setItems(items); IVr 2y8K
setStartIndex(startIndex); )
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} I\qYkWg7
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publicList getItems(){ x{NX8lN
return items; UpXz&k
} lnE+Au'
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publicvoid setItems(List items){ yqSs,vz
this.items = items; Tz2-Bp]h
} (M
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publicint getPageSize(){ vK$"# F~
return pageSize; *5<Sr q'
} 9 2MTX
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publicvoid setPageSize(int pageSize){ <o2r~E0r3
this.pageSize = pageSize; A]L%dFK
} ??hJEE
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publicint getTotalCount(){ +i\&6HGK;-
return totalCount; Sx
} #d{=\$=
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publicvoid setTotalCount(int totalCount){ RtG}h[k/X
if(totalCount > 0){ ^IKO2Ft
this.totalCount = totalCount; `IYuz:
int count = totalCount / kj+#TnF-
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pageSize; :b[`
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if(totalCount % pageSize > 0) LJX-AO.4
count++; )} DUMq7
indexes = newint[count]; pf4 ^Bk}e
for(int i = 0; i < count; i++){ oJKa"H-jL
indexes = pageSize * "m{,~'x
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} X0{/ydGF8
}else{ 1_$xSrwcF
this.totalCount = 0; "uLjIIl
} q P ;A}C
} mVtXcP4b
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publicint[] getIndexes(){
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return indexes;
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} tweY'x.{
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publicvoid setIndexes(int[] indexes){ m~Ld~I"
this.indexes = indexes; Z%Z9oJ:
} Gamr6I"K
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publicint getStartIndex(){ I *c;H I
return startIndex; 0'&X
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} n6F/Ac:
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publicvoid setStartIndex(int startIndex){ z9W`FBg
if(totalCount <= 0) (BX83)
this.startIndex = 0; ~f|Z%&l|
elseif(startIndex >= totalCount) !h&g7do]Z
this.startIndex = indexes 2tayP@$
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[indexes.length - 1]; i?Ss: v^
elseif(startIndex < 0) )o!XWh
this.startIndex = 0; 5=(c%
else{ ozsxXBh-`'
this.startIndex = indexes z}SND9-"
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[startIndex / pageSize]; 1
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} *zO&N^X.4
} cYNJhGY
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publicint getNextIndex(){ `SO|zz|'
int nextIndex = getStartIndex() + _DRrznaw
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pageSize; Y}6n]n;uR
if(nextIndex >= totalCount) t+CWeCp,
return getStartIndex(); r!}al5~&
else W{XkVKe1a
return nextIndex; V+?]S
} 3#wcKv%>&_
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publicint getPreviousIndex(){ `ir3YnT+
int previousIndex = getStartIndex() - h72UwJ2rw
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pageSize; Kex[ >L10G
if(previousIndex < 0) Z: 2I/
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else F{k+7Ftc
return previousIndex; Dj-s5pAW
} [%HIbw J
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} X
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抽象业务类 tXF]t
java代码: (yQ
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/** D-9\~gvh
* Created on 2005-7-12 [n,?WwC
*/ EruP
package com.javaeye.common.business; ,KW;2t*IQ@
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import java.io.Serializable; 9T2xU3UyY
import java.util.List; ? y},,
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import org.hibernate.Criteria; jm>3bd
import org.hibernate.HibernateException; Hr;h4J
import org.hibernate.Session; &UAe!{E0
import org.hibernate.criterion.DetachedCriteria; z?8~[h{i%
import org.hibernate.criterion.Projections; ;mm!0]V
import @^nu#R
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org.springframework.orm.hibernate3.HibernateCallback; c
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import >AD=31lq
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org.springframework.orm.hibernate3.support.HibernateDaoS g;F"7
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import com.javaeye.common.util.PaginationSupport; @
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public abstract class AbstractManager extends _ P ,@
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HibernateDaoSupport { ,^T]UHRO
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privateboolean cacheQueries = false; |:iEfi]j
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privateString queryCacheRegion; !oSLl.fQd
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publicvoid setCacheQueries(boolean G^h_YjR`*
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cacheQueries){ DMgBcP
this.cacheQueries = cacheQueries; Hw_o
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} [$:,-Q @
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publicvoid setQueryCacheRegion(String :=g.o;(/N
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queryCacheRegion){ NXoK@Y
this.queryCacheRegion = 4KIWb~0Y
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queryCacheRegion; FUTn
} ")\aJ8
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publicvoid save(finalObject entity){ `q?RF+
getHibernateTemplate().save(entity); ?iSGH'[u
} r#h {$iW
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publicvoid persist(finalObject entity){ u^Sv#K X
getHibernateTemplate().save(entity); Zw=G@4xoU
} mZoD033H
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publicvoid update(finalObject entity){ gA
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getHibernateTemplate().update(entity); JLUms
} vo;5f[>4i
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publicvoid delete(finalObject entity){ pcpxe&S
getHibernateTemplate().delete(entity); [\HQPo'S
} Q_lu`F|
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publicObject load(finalClass entity, $%}>zqD1
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finalSerializable id){ ]7<m1Lg
return getHibernateTemplate().load 22bT3
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(entity, id); =YoTyq\
} XARSGAuw
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publicObject get(finalClass entity, |0w~P
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finalSerializable id){ RK3.-
return getHibernateTemplate().get #_p
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(entity, id); f(.6|mPp
} }~GV'7d1
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publicList findAll(finalClass entity){ 0#
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return getHibernateTemplate().find("from Zjt9vS)
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" + entity.getName()); !h/dZ`#
} 'Z$jBL
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publicList findByNamedQuery(finalString }!knU3J
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namedQuery){ ZpTi:3>
return getHibernateTemplate $l43>e{E
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().findByNamedQuery(namedQuery); kU>#1He
} yh4jRe?f
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publicList findByNamedQuery(finalString query, "&|lO|
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finalObject parameter){ @s3aR*ny$
return getHibernateTemplate J1& A,Gb
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().findByNamedQuery(query, parameter); N.k+AQb
} EOofa6f&l
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publicList findByNamedQuery(finalString query, NH<Y1t
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finalObject[] parameters){ [Aa[&RX+9
return getHibernateTemplate qW+=g]x\
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().findByNamedQuery(query, parameters); m]Hb+Y=;h
} #IbS
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publicList find(finalString query){ ;sm"\.jF
return getHibernateTemplate().find AfuXu@UZ_/
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(query); 5F% h>tqh
} QZ6[*_Z6
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publicList find(finalString query, finalObject z%++\.g_
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parameter){ +"TI_tK,S
return getHibernateTemplate().find ?r^
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(query, parameter); m+;B!46
} !5yRWMO9X~
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public PaginationSupport findPageByCriteria pjaiAe!k
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(final DetachedCriteria detachedCriteria){ xe"4u JO
return findPageByCriteria 6~:W(E}
}wa}hIqx
(detachedCriteria, PaginationSupport.PAGESIZE, 0); '-$))AdD
} |iLx $P6
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public PaginationSupport findPageByCriteria BG(R=,
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(final DetachedCriteria detachedCriteria, finalint qAS70XjOF
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startIndex){ 34/]m/2NZK
return findPageByCriteria mf
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(detachedCriteria, PaginationSupport.PAGESIZE, CVyx lc>
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startIndex); jsZiARTZRl
} Fi,e}j=2f
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public PaginationSupport findPageByCriteria {<''OwQF~+
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(final DetachedCriteria detachedCriteria, finalint ~#HH;q_7m
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pageSize, |o; j0
finalint startIndex){ \]L::"![?
return(PaginationSupport) t z
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getHibernateTemplate().execute(new HibernateCallback(){ kuKnJWv
publicObject doInHibernate ^rxfNcU7
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(Session session)throws HibernateException { a6#{2q
Criteria criteria = IDiUn!6Q
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detachedCriteria.getExecutableCriteria(session); qJbhPY8Ak
int totalCount = Xd19GP!
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((Integer) criteria.setProjection(Projections.rowCount ]sm0E@ 1
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()).uniqueResult()).intValue(); BW;=i.
criteria.setProjection +aXk^+~j
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(null); t`Y1.]@U
List items = NXWIE4T>*^
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criteria.setFirstResult(startIndex).setMaxResults 6>LQGO
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(pageSize).list(); &Gy'AUz-
PaginationSupport ps = l b1sV
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new PaginationSupport(items, totalCount, pageSize, V5hlG =V
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startIndex); J 4'!
return ps; 7Y @=x#
} KH@) +Rj
}, true); ]'
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} 2U+z~
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public List findAllByCriteria(final ./BP+\)lO
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DetachedCriteria detachedCriteria){ +hKPOFa'
return(List) getHibernateTemplate e G*s1uQl
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().execute(new HibernateCallback(){ (Aov}I+
publicObject doInHibernate |V~(mS747:
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(Session session)throws HibernateException { }v(H
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Criteria criteria = 1!v >I"]
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detachedCriteria.getExecutableCriteria(session); /kviO@jm4(
return criteria.list(); E{k%d39>
} te)g',#lT
}, true); 9T0wdK]
} +G=C~X
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public int getCountByCriteria(final )>#<S0>'j
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DetachedCriteria detachedCriteria){ ^x1D]+
Integer count = (Integer) FDGKMGZ
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getHibernateTemplate().execute(new HibernateCallback(){ eQ)ioY
publicObject doInHibernate m%$E[cUW!
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(Session session)throws HibernateException { @l6dJ
Criteria criteria = )>A%FL9
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detachedCriteria.getExecutableCriteria(session); :#!F 7u
return MgK(gL/&[
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criteria.setProjection(Projections.rowCount [ Xo
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()).uniqueResult(); =L; n8~{@y
} v'Py[[R
}, true); :-'ri Ry
return count.intValue(); UNH}*]u4`
} V{aIhH>P
} O [ ; 6E
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