Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 _qo1 GM&
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 H 6<@
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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 s1apHwJ -
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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 S^n4aBm\+
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分页支持类: Ym2m1
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java代码: g%P4$|C9i
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package com.javaeye.common.util; w%H#>k
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import java.util.List; LMzYsXG*[
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publicclass PaginationSupport { AG0x)
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publicfinalstaticint PAGESIZE = 30; X0=-{<W
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privateint pageSize = PAGESIZE; l7um9@[4
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privateList items; 8rNxd=!
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privateint totalCount; "n-xsAG
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privateint[] indexes = newint[0]; !]T|=yw
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privateint startIndex = 0; ?`}U|]c
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public PaginationSupport(List items, int m_f^#:
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totalCount){ hlEvL
setPageSize(PAGESIZE); 5Ozj&Zq
setTotalCount(totalCount); 86Vu PV-
setItems(items); B
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setStartIndex(0); o#b9M4O
} y
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public PaginationSupport(List items, int [_Z3v,vt,
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totalCount, int startIndex){ ~epkRO="
setPageSize(PAGESIZE); kS!*kk*a
setTotalCount(totalCount); % m$Mnx
setItems(items); PrxXL/6
setStartIndex(startIndex); 0CYI,V
} $OuA<-
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public PaginationSupport(List items, int oLRio.u*
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totalCount, int pageSize, int startIndex){ uBJF}"4ej
setPageSize(pageSize); M-t9zT
setTotalCount(totalCount); D1a2|^zt
setItems(items); eU*hqy?0
setStartIndex(startIndex); h2K
} l6O(+*6Us
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publicList getItems(){ #2iA-5
return items; m0YDO0
} sS|5x
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publicvoid setItems(List items){ y.OUn'^d4
this.items = items; $dVjxo
} J)f?x T*
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publicint getPageSize(){ xRmB?kM3]5
return pageSize; EA72%Y9F
} WX9BS$}0
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publicvoid setPageSize(int pageSize){ 5O*$#C;c
this.pageSize = pageSize; ZN/")
} J3v uh#
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publicint getTotalCount(){ :}cAq/
return totalCount; elQ44)TrQ
} ?:c hAN@
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publicvoid setTotalCount(int totalCount){ eP8wTStC
if(totalCount > 0){ IFe[3mB5
this.totalCount = totalCount; -#h
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int count = totalCount / eS M!_2
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pageSize; kQtl&{;k?
if(totalCount % pageSize > 0) F u)7J4Z
count++; ) Lv{
indexes = newint[count]; iFnM6O$(
for(int i = 0; i < count; i++){ hw1s^:|+2
indexes = pageSize * [a2/`ywdV
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} 7UfyOOFa
}else{ v?J2cL
this.totalCount = 0; l!2.)F` x
} TDFv\y}yc
} y!].l0e2a
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publicint[] getIndexes(){ 6AY%onY
return indexes; L'(^[vR(
} D!CGbP(
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publicvoid setIndexes(int[] indexes){ K7U<~f$OiN
this.indexes = indexes; Z2r\aZ-d`
} `1d r$U
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publicint getStartIndex(){ JT<J[Qz5
return startIndex; :Li)]qN.I
} BehV
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publicvoid setStartIndex(int startIndex){ 0Pe.G0 #
if(totalCount <= 0) H}X"yLog*
this.startIndex = 0; HD|5:f AqA
elseif(startIndex >= totalCount) :Wln$L$
this.startIndex = indexes pc #^{-
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[indexes.length - 1]; 9;jfg|x1[
elseif(startIndex < 0) -HOCxR
this.startIndex = 0; Z|.z~53;
else{ 1*5n}cU~
this.startIndex = indexes fw5AZvE6$
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[startIndex / pageSize]; "D+QT+sD
} +KZc"0?
} X~0P+E#
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publicint getNextIndex(){ p[RD[b
int nextIndex = getStartIndex() + B{Rig5Sc
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pageSize; rW6LMkt72
if(nextIndex >= totalCount) QH;aJ(>$
return getStartIndex(); jWQB~XQY
else cI H`,bR
return nextIndex; MFVFr "
} aLr^uce]
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publicint getPreviousIndex(){ m{X;|-DK[
int previousIndex = getStartIndex() -
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pageSize; DZvpt%q
if(previousIndex < 0) dg-pwWqN
return0; BJvVZl2h
else UV=TU=A\o
return previousIndex; ls=<c<
} 1i{B47|
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}
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抽象业务类 :=* -x
java代码: V[%r5!83H
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/** BR|dW4\
* Created on 2005-7-12 ~{ HA!C#
*/ r J&1[=s
package com.javaeye.common.business; ='s2S5#1
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import java.io.Serializable; &" b0`&l
import java.util.List; Lbd_L
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import org.hibernate.Criteria; PRs[:we~~
import org.hibernate.HibernateException; ar{Yq
import org.hibernate.Session; ~j UK-E
import org.hibernate.criterion.DetachedCriteria; ?p`}6s Q}
import org.hibernate.criterion.Projections; E3`KO'v%
import ~_K
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org.springframework.orm.hibernate3.HibernateCallback; WvR}c
import "~GudK &
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org.springframework.orm.hibernate3.support.HibernateDaoS H`fkds
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upport; 4}gwMjU-B
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import com.javaeye.common.util.PaginationSupport; G G7N!eZ
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public abstract class AbstractManager extends <>-UPRwqI
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HibernateDaoSupport { bju0l[;=
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privateboolean cacheQueries = false; I@.qon2V
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privateString queryCacheRegion; &%^[2^H8"
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publicvoid setCacheQueries(boolean 6~^+</?
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cacheQueries){ W0R6<-
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this.cacheQueries = cacheQueries; Y~Zg^x2
} ])e6\)
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publicvoid setQueryCacheRegion(String 9~a_^m/
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queryCacheRegion){ 3n
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this.queryCacheRegion = =\`9 \Gd
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queryCacheRegion; ao
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} m^p
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publicvoid save(finalObject entity){ >5 Ce/P'R
getHibernateTemplate().save(entity); Oi7|R7NE
} <{e0i
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publicvoid persist(finalObject entity){ |
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getHibernateTemplate().save(entity); Yh"R#
} S7-?&[oeJ
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publicvoid update(finalObject entity){ Rb#?c+&#
getHibernateTemplate().update(entity); 5FzG_ w
} V$@@!q
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publicvoid delete(finalObject entity){ TLi0*)}
getHibernateTemplate().delete(entity); ci,o'`Q
} W.>yIA%
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publicObject load(finalClass entity, 6?2/b`k
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finalSerializable id){ E|#'u^`yv
return getHibernateTemplate().load 'tF<7\!
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(entity, id); mh|M O(
} H,] D}r
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publicObject get(finalClass entity, ZN^9w"A
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finalSerializable id){ g~N)~]0{
return getHibernateTemplate().get ~KEnZa0
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(entity, id); D,]m7yFT
} &AA u:
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publicList findAll(finalClass entity){ Ro?yCy:L'
return getHibernateTemplate().find("from 76xgExOU?C
=yk#z84<
" + entity.getName()); tWD*uAb
} i9w xP i
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publicList findByNamedQuery(finalString T7&itgEYG/
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namedQuery){ @ -g^R4e<
return getHibernateTemplate *j8w"
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().findByNamedQuery(namedQuery); :'#BU:
} hnL(~
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publicList findByNamedQuery(finalString query, jUdW o}/
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finalObject parameter){ BYP,}yzA
return getHibernateTemplate !dGy"-i$h
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().findByNamedQuery(query, parameter); ;z!~-ByzL
} 2x'JR yef
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publicList findByNamedQuery(finalString query, 0G;RMR ':5
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finalObject[] parameters){ ^h=;]vxO
return getHibernateTemplate 65qH
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().findByNamedQuery(query, parameters); eRC@b^~
}
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publicList find(finalString query){ {U7j
return getHibernateTemplate().find X2Y-TET
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(query); NcRY
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} 6SW:'u|90
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publicList find(finalString query, finalObject liPUK #
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parameter){ YgrBIul
return getHibernateTemplate().find '^}l|(
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(query, parameter); G,$RsP
} %;9wToyK>
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public PaginationSupport findPageByCriteria ?5"~V^L3
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(final DetachedCriteria detachedCriteria){ sm/l'e
return findPageByCriteria ;%hlh)k$
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); m3K8hL/
} n+j'FfSz
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public PaginationSupport findPageByCriteria 3>/Yku)t
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(final DetachedCriteria detachedCriteria, finalint 8BC}D+q
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startIndex){ ^=FtF9v
return findPageByCriteria [P,1UO|$B
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(detachedCriteria, PaginationSupport.PAGESIZE, <wc=SMmO
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startIndex);
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} 9Jaek_A`
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public PaginationSupport findPageByCriteria OV Iu&6#
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(final DetachedCriteria detachedCriteria, finalint 5(tOQ%AQ
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pageSize, !$f@j6.
finalint startIndex){ f
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return(PaginationSupport) qP *$wKY,
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getHibernateTemplate().execute(new HibernateCallback(){ #*1\h=bzmW
publicObject doInHibernate i{
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(Session session)throws HibernateException { 7[ *,t
Criteria criteria = \P+lb-~\"
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detachedCriteria.getExecutableCriteria(session); SPn0D9b]
int totalCount = g_5:o
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((Integer) criteria.setProjection(Projections.rowCount rG}o!I`z
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()).uniqueResult()).intValue(); '$UlJDZ
criteria.setProjection mdtq-v
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(null); /0\m;&
List items = ] +LleS5
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criteria.setFirstResult(startIndex).setMaxResults 8lT.2H
b_z;^y~
(pageSize).list(); y`! 3Z} 7
PaginationSupport ps = t/#[At5p=
9#@dQ/*
new PaginationSupport(items, totalCount, pageSize, 9^c\$"2B
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startIndex); khyn4
return ps; w<tr<Pu'
} pEw &i
}, true); RiIJ#:6+^I
} <