Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 82w='~y
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 K._tCB:
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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 )qGw!^8
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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 <&n\)R4C1
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分页支持类: d"
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java代码: "3kIQsD|j
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package com.javaeye.common.util; B~/:["zTh&
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import java.util.List; (Rqn)<<2
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publicclass PaginationSupport { icq!^5BzL
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publicfinalstaticint PAGESIZE = 30; d ] J5c
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privateint pageSize = PAGESIZE; 5iE-$,7#L
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privateList items; 3h:"-{MW.
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privateint totalCount; \,YF['Qq
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privateint[] indexes = newint[0]; =(ULfz[:
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privateint startIndex = 0; 5PY,}1`
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public PaginationSupport(List items, int jB+K)NXHL
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totalCount){ !f
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setPageSize(PAGESIZE); -;/;d z;
setTotalCount(totalCount); LvlVZjT
setItems(items); |@{4zoP_N
setStartIndex(0); =Q#}
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} xgw[)!g^\
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public PaginationSupport(List items, int !(:R=J_h
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totalCount, int startIndex){ .h!oo;@
setPageSize(PAGESIZE); jV83%%e
setTotalCount(totalCount); 8lG@8tbW^
setItems(items); -+^E5
setStartIndex(startIndex); zZrUS'8
} clE_a?
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public PaginationSupport(List items, int xign!=
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totalCount, int pageSize, int startIndex){ z8HOig?
setPageSize(pageSize); ,>H(l$n
setTotalCount(totalCount); gi26Dtk(h
setItems(items); X?m"86L
setStartIndex(startIndex); V)[ta`9
} n<
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publicList getItems(){ }m!L2iK4qk
return items; 3v~804kWB
} JmHEYPt0
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publicvoid setItems(List items){ nE_g^
this.items = items; u4
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} TqzL] 'NS+
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publicint getPageSize(){ -4
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return pageSize; TvV_Tz4e
} yV;_ ]_EO
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publicvoid setPageSize(int pageSize){ $yd "bJK
this.pageSize = pageSize; 74Fv9
} Lye^G%{
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publicint getTotalCount(){ l~|x*JTq
return totalCount; L'=mDb
} 1}O&q6\"J
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publicvoid setTotalCount(int totalCount){ k!9LJ%Xh
if(totalCount > 0){ K9{]v=#I
this.totalCount = totalCount; t0$}
int count = totalCount / 5u\#@% \6
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pageSize; s8i@HO
if(totalCount % pageSize > 0) FU;b8{Y
count++; \6]Uj+
indexes = newint[count]; --t"X<.z
for(int i = 0; i < count; i++){ ccUI\!TD{/
indexes = pageSize * Y9YE:s
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} IP#w
}else{ BZ2frG\0&I
this.totalCount = 0; 0rnne
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} 28/At
} s&>U-7fx"
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publicint[] getIndexes(){ :`Nh}Ka0
return indexes;
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} O,$
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publicvoid setIndexes(int[] indexes){ y(^hlX6gQ
this.indexes = indexes; rn$LZE
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} -0pAj}_2}
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publicint getStartIndex(){ %Z:07|57I[
return startIndex; u\)2/~<]
} ,CGq_>Z
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publicvoid setStartIndex(int startIndex){ /w5~ O:
if(totalCount <= 0) #Cj$;q{!
this.startIndex = 0; P4h^_*d
elseif(startIndex >= totalCount) )GbVgYkk
this.startIndex = indexes 8eAc 5by
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[indexes.length - 1]; S"}G/lBx.
elseif(startIndex < 0) @ V_@r@A
this.startIndex = 0; E~[v.3`
else{ M1>2Q[h7
this.startIndex = indexes Wciw6.@
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[startIndex / pageSize]; u]<7}R@s
} oRp;9
} khXp}p!Zm
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publicint getNextIndex(){ g8+Ke'=_
int nextIndex = getStartIndex() + ,PmQ}1kGW
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pageSize; GjHV|)^
if(nextIndex >= totalCount) Qp]-:b
return getStartIndex(); -W6r.E$mC
else E%+ aqA)f
return nextIndex; oU\Q|mN(
} y2_^lW%
{ \r1A
publicint getPreviousIndex(){ 0=WZ 8|R
int previousIndex = getStartIndex() - =1:dKo8
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pageSize; .aA8'/
if(previousIndex < 0) ~7kIe+V
return0; vt(A?$j|A
else ,JLY
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return previousIndex; E#5$O2b#
} tf:4}6P1
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抽象业务类
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java代码: "OdR"M(G\
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/** h2Kx
* Created on 2005-7-12 RyAss0Sm^
*/ K6 {0`'x
package com.javaeye.common.business; )P)Zds@F
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import java.io.Serializable; ]j^V5y"
import java.util.List; 4ONou&T
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import org.hibernate.Criteria; ;|.~'':
import org.hibernate.HibernateException; )`4g, W
import org.hibernate.Session; Eps2
import org.hibernate.criterion.DetachedCriteria; {j0c)SETN
import org.hibernate.criterion.Projections; 0EA<ip
import ;aI`4;
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org.springframework.orm.hibernate3.HibernateCallback; CyWaXp65
import iJ7?6)\
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org.springframework.orm.hibernate3.support.HibernateDaoS T#>1$0yv
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upport; )|d]0/<
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import com.javaeye.common.util.PaginationSupport; =}8:zO
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public abstract class AbstractManager extends ]jkaOj
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HibernateDaoSupport { dHAI4Yf4U
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privateboolean cacheQueries = false; m4 :|
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privateString queryCacheRegion; cTq}H_hC
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publicvoid setCacheQueries(boolean XAnN<
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cacheQueries){ gM5`UH|
this.cacheQueries = cacheQueries; e1
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}
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publicvoid setQueryCacheRegion(String ++Z,U
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queryCacheRegion){ F5Xj}`}bq
this.queryCacheRegion = Ki8]+W37
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queryCacheRegion; &B;M.sz~C4
} *k (|r>
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publicvoid save(finalObject entity){ @N?u{|R:d
getHibernateTemplate().save(entity); 1Re5)Y:i
} [VsTyqV a
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publicvoid persist(finalObject entity){ t:SME'~.P
getHibernateTemplate().save(entity); &'0|U{|
} d/m.VnW
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publicvoid update(finalObject entity){ /c>@^
getHibernateTemplate().update(entity); >=WlrmI
} Hp@nxtKxW
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publicvoid delete(finalObject entity){ G<8d=}
getHibernateTemplate().delete(entity); p ow.@
} oaK&!$S]
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publicObject load(finalClass entity, d=6FL" .o
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finalSerializable id){ `u *:wJsv
return getHibernateTemplate().load TsvF~Gdp
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(entity, id); DO^K8~]
} $?e_l
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publicObject get(finalClass entity, JF+E.-fy$
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finalSerializable id){ ^e1Ux
return getHibernateTemplate().get w<0F-0:8
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(entity, id); \'BA}v
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} "SV#e4C.
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publicList findAll(finalClass entity){ Hl3%+f
return getHibernateTemplate().find("from =MsQ=:ZV
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" + entity.getName()); +W8L^Wl
} %#zqZ|q
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publicList findByNamedQuery(finalString m"r=p
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namedQuery){ :O~*}7G
return getHibernateTemplate 3O'6 Ae
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().findByNamedQuery(namedQuery); 3T|xUY)G4
} $YNW T\FE
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publicList findByNamedQuery(finalString query, RTJ\|#w
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finalObject parameter){ !=Hu?F p
return getHibernateTemplate e[:i`J2
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().findByNamedQuery(query, parameter); 5N_w(B
} !I8m(axW
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publicList findByNamedQuery(finalString query, SFiK_;
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finalObject[] parameters){ KH~o0 W
return getHibernateTemplate 'Y%@fZf x
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().findByNamedQuery(query, parameters); -fA1_ ?7S
} DMc H, _(
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publicList find(finalString query){ ],3#[n[ m
return getHibernateTemplate().find c=52*&
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(query); I_k!'zR[N
} cu~\&3R
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publicList find(finalString query, finalObject {wNNp't7
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parameter){ wt(Hk6/B
return getHibernateTemplate().find hYI0S7{G
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(query, parameter); DA(ur'D
} / p PSo
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public PaginationSupport findPageByCriteria xaSg'8-
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(final DetachedCriteria detachedCriteria){ _Z>I"m
return findPageByCriteria {j!jm5
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); 1>pFUf|cV
} r) SG!;X
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public PaginationSupport findPageByCriteria @}8~TbP
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(final DetachedCriteria detachedCriteria, finalint dHUcu@,
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startIndex){ u |EECjJn
return findPageByCriteria a(a2xa
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(detachedCriteria, PaginationSupport.PAGESIZE, Cr a@
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startIndex); "7.
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} Ny6 daf3f
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public PaginationSupport findPageByCriteria 0]._|Ubn6)
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(final DetachedCriteria detachedCriteria, finalint ?cH,!2
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pageSize, z/Kjz$l!
finalint startIndex){ l?rT_uO 4
return(PaginationSupport) dZ"B6L!^(
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getHibernateTemplate().execute(new HibernateCallback(){ p#
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publicObject doInHibernate qVidubsW
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(Session session)throws HibernateException { rZt7C(FM$7
Criteria criteria = -{=c T?"+
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detachedCriteria.getExecutableCriteria(session); 2=[de Qs
int totalCount = ="<S1}.
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((Integer) criteria.setProjection(Projections.rowCount 1vG]-T3VC
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()).uniqueResult()).intValue(); d ~`_;.z
criteria.setProjection (X(296<;
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(null); wRATe
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List items = $zR[2{bg
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criteria.setFirstResult(startIndex).setMaxResults Tam\,j
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