Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 B,z<%DAE
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 4E8JT#&
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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 4GG>!@|
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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[yE]v^
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分页支持类: B:"THN^
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java代码: TGuiNobD
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package com.javaeye.common.util; CV$],BM
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import java.util.List; sDgXU@
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publicclass PaginationSupport { :ztr)
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publicfinalstaticint PAGESIZE = 30; WWwUwUi
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privateint pageSize = PAGESIZE; f:zFFpP.j@
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privateList items; N_4eM,7t
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privateint totalCount; .*=]gZ$IE
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privateint[] indexes = newint[0]; bf_I9Z3m
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privateint startIndex = 0; ~/_9P Fk
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public PaginationSupport(List items, int W$dn_9W
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totalCount){ 4vK8kkW1
setPageSize(PAGESIZE); _ 7oV<
setTotalCount(totalCount); ;TQf5|R\K
setItems(items); D+ V7hpH-
setStartIndex(0); <VjJAu
} n<Svwa}
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public PaginationSupport(List items, int 8pM>Co!
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totalCount, int startIndex){ /|{,sWf2
setPageSize(PAGESIZE); Uu6L~iB
setTotalCount(totalCount); D/(L
setItems(items); 4!$
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setStartIndex(startIndex); 0)YbI!
} v8>v.}y
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public PaginationSupport(List items, int ]u-SL md
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totalCount, int pageSize, int startIndex){ W]<$0
setPageSize(pageSize); +y[@T6_
setTotalCount(totalCount); O9v_y+M+M
setItems(items); LCXO>MXN
setStartIndex(startIndex); )g|
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} ~:;3uLs,8
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publicList getItems(){ &a> lWE
return items; -0o[f53}p
} I9$c F)zk
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publicvoid setItems(List items){ C`oa3B,z
this.items = items; Q^}%c
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} +5<k-0v
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publicint getPageSize(){ G"
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return pageSize; UbJ*'eoX
} [}nK"4T"Ri
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publicvoid setPageSize(int pageSize){ |YJCWFbs8
this.pageSize = pageSize; 4}v@C|.p
} bTmL5}n
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publicint getTotalCount(){ *#>F.#9
return totalCount; WiNT;v[
} p?(L'q"WK
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publicvoid setTotalCount(int totalCount){ fT:}Lj\L1
if(totalCount > 0){ O/AE}]
this.totalCount = totalCount; O[~x_xeW
int count = totalCount / Ar9nBJ`
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pageSize; !&kL9A).
if(totalCount % pageSize > 0) 2H#N{>7
count++; AWr}"r?s
indexes = newint[count]; 9~AWn g
for(int i = 0; i < count; i++){ =?}twC$
indexes = pageSize * )9"oL!2h
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} u.|~
}else{ UP1?5Q=H]Q
this.totalCount = 0; 4|J[Jdj
} hP?fMW$V
} F:FMeg
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publicint[] getIndexes(){ i`U:gw
return indexes; 6o3T;h
} I d8wS!W`7
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publicvoid setIndexes(int[] indexes){ y+mElG$F
this.indexes = indexes; A;K(J4y*
} *3{J#Q6fk3
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publicint getStartIndex(){ kN9yO5h7
return startIndex; Iq'O
} uZjI?Z.A
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publicvoid setStartIndex(int startIndex){ #Fd W/y5
if(totalCount <= 0) ^tAO_~4
this.startIndex = 0; _."E%|5
elseif(startIndex >= totalCount) I=dGq;Jaz
this.startIndex = indexes ))#'4
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[indexes.length - 1]; 9Ld9N;rWm#
elseif(startIndex < 0) a%,fXp>
this.startIndex = 0; 2wpjU&8W!
else{ ija:H'j
this.startIndex = indexes :iCM=k
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[startIndex / pageSize]; 2hOPzv&B
} e1 a*'T$z
} tm)*2lH6
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publicint getNextIndex(){ D!FaE N
int nextIndex = getStartIndex() + -WR}m6yMr
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pageSize; hw,^G5m
if(nextIndex >= totalCount) YB!!/ SX4
return getStartIndex(); ia{kab|_5
else F-0UdV
return nextIndex; #s"B-sWE
} V/y=6wUiSl
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publicint getPreviousIndex(){ MV936
int previousIndex = getStartIndex() - jXIEp01
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pageSize; gg]~2f
if(previousIndex < 0) X%4h(7;v
return0; <MZi<Z`
else
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return previousIndex; !IAKVQ
} 1L[S*X
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} Npa-$N&P{S
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抽象业务类 6E+=Xi
java代码: Dd/}Ya(Gi
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/** 9~Xg#{
* Created on 2005-7-12 T
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*/ .cR*P<3O
package com.javaeye.common.business; (!n-Age
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import java.io.Serializable; ryEvmWYu
import java.util.List; H1Xov r
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import org.hibernate.Criteria; E^syrEz
import org.hibernate.HibernateException; AQ}l%
import org.hibernate.Session; I7Zq}Pxa
import org.hibernate.criterion.DetachedCriteria; 6Bdyf(t
import org.hibernate.criterion.Projections; ^<9)"9)m_
import >B~?dT m
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org.springframework.orm.hibernate3.HibernateCallback; E& ]_U$
import 6D^%'[4t
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org.springframework.orm.hibernate3.support.HibernateDaoS LW?2}`+
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upport; 7xDN.o*>
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import com.javaeye.common.util.PaginationSupport; M,{<TpCx
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public abstract class AbstractManager extends APuu_!ez1
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HibernateDaoSupport { Na;t#,
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privateboolean cacheQueries = false; :eLLDp<
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privateString queryCacheRegion; JOHp?3 "4
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publicvoid setCacheQueries(boolean ~$ WQ"~z
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cacheQueries){ qq>44 k\|)
this.cacheQueries = cacheQueries; KqY>4tb
} XAlD
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publicvoid setQueryCacheRegion(String RA~_]Hk
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queryCacheRegion){ ?(M\:`G'
this.queryCacheRegion = lc-*8eS
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queryCacheRegion; U#l.E1Z
} CY\mU_.b
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publicvoid save(finalObject entity){ "p2u+ 8?
getHibernateTemplate().save(entity); .Px,=56$X
} Jz2q\42q
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publicvoid persist(finalObject entity){ IT7:QEfKU
getHibernateTemplate().save(entity); ~M(pCSJ[
} \ !6t
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publicvoid update(finalObject entity){ &A#90xzF
getHibernateTemplate().update(entity); }8X:?S
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} _4De!q0(
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publicvoid delete(finalObject entity){ $M%}Oz3*
getHibernateTemplate().delete(entity); A'w2GC{.
} %hrsE5k^,
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publicObject load(finalClass entity, A`
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finalSerializable id){ cbY3m Sfn*
return getHibernateTemplate().load ]*;RHy9
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(entity, id); + >Fv*lux
} m}sh I8S
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publicObject get(finalClass entity, FxMMxY,*%
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finalSerializable id){ zbdOCfA;
return getHibernateTemplate().get vHoT@E#}'
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(entity, id); %,h!: Ec^c
} %Gnd"SGs
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publicList findAll(finalClass entity){
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return getHibernateTemplate().find("from yRSy(/L^+
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" + entity.getName()); UEk|8yq
} |2tSUOZ
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publicList findByNamedQuery(finalString *s
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namedQuery){ Zz{[Al{
return getHibernateTemplate }C9VTJs|
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().findByNamedQuery(namedQuery); n C\(+K1%
} dpl"}+
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publicList findByNamedQuery(finalString query, f4qS OVv
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finalObject parameter){ N GX-'w
return getHibernateTemplate 'lSnyW{
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().findByNamedQuery(query, parameter); S+4I[|T]Y
} Vw6>:l<+<
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publicList findByNamedQuery(finalString query, 0YgFjd
5
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finalObject[] parameters){ H"kc^G+(R"
return getHibernateTemplate IX > j8z[
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().findByNamedQuery(query, parameters); LL6ON
}
} 23.y3t_?
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publicList find(finalString query){ x(T!I&i={
return getHibernateTemplate().find !ds"88:5^
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(query); Al;%u0]5
} &eLQ;<qO*|
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publicList find(finalString query, finalObject s0`]!7D<
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parameter){ v{\n^|=])
return getHibernateTemplate().find JCQx8;V%I
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(query, parameter); Dg];(c+/
}
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public PaginationSupport findPageByCriteria )SlUQ7f>
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(final DetachedCriteria detachedCriteria){ P*nT\B
return findPageByCriteria l%Fse&4\
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); ?Sd~u1w8K
} 1' @lg*^9
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public PaginationSupport findPageByCriteria /oixtO)
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(final DetachedCriteria detachedCriteria, finalint +p%5/smfs
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startIndex){ u"
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return findPageByCriteria g)|++?
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(detachedCriteria, PaginationSupport.PAGESIZE, HK,G8:T
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startIndex); el*pYI
} &>wce5uV
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public PaginationSupport findPageByCriteria j@_) F^12
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(final DetachedCriteria detachedCriteria, finalint ;JD3tM<
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pageSize, Q i'WV9ke
finalint startIndex){ TG%hy"k
return(PaginationSupport) U!-+v:SF
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getHibernateTemplate().execute(new HibernateCallback(){ +e3WwUx
publicObject doInHibernate P.H/H04+
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(Session session)throws HibernateException { K
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Criteria criteria = Vlxb<$5Nh
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detachedCriteria.getExecutableCriteria(session); +68K[s,FD
int totalCount = Cx3m\
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((Integer) criteria.setProjection(Projections.rowCount '|A5a+[
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()).uniqueResult()).intValue(); 4+ ?ZTc(
criteria.setProjection :"+UG-S$6
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(null); !O -_Dp\#
List items = 6+f>XL#w
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criteria.setFirstResult(startIndex).setMaxResults tP^mq>
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(pageSize).list(); U"Ob@$ROFy
PaginationSupport ps = L)nVpqm
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new PaginationSupport(items, totalCount, pageSize, ]ieA?:0Hi
j'Q-*-3
startIndex); bZlLivi
return ps; gW pT:tX-
} dK(%u9v
}, true); `6/Yf@b
} +(P43XO08
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public List findAllByCriteria(final %LZM5Z^
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DetachedCriteria detachedCriteria){ 41Q
return(List) getHibernateTemplate \t(r@qq
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().execute(new HibernateCallback(){ WQmiG=Dw^
publicObject doInHibernate 7'/2 :"
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(Session session)throws HibernateException { G~hILW^
Criteria criteria = &*:)5F5
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detachedCriteria.getExecutableCriteria(session); LY cSMuJ
return criteria.list(); _M4v1Hr48
} =28H^rK{
}, true); |3lAye,t)a
} p1gX4t]%}a
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public int getCountByCriteria(final e4H0<h
}{
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DetachedCriteria detachedCriteria){ Iybpk?,M+
Integer count = (Integer) Olh%"=*;
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getHibernateTemplate().execute(new HibernateCallback(){ F*( A; N_y
publicObject doInHibernate )"3oe ?
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(Session session)throws HibernateException { dv}R]f'
Criteria criteria = 1Kf
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detachedCriteria.getExecutableCriteria(session); G`lhvpifG
return x<7` 109]
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criteria.setProjection(Projections.rowCount z>g& ?vo2
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()).uniqueResult(); %=O!K>^vt<
} J0mCWtx&
}, true); UT7lj wT
return count.intValue(); 19{?w6G<k
} G:ngio]G0
} ea}KxLC`,
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用户在web层构造查询条件detachedCriteria,和可选的 /Z_ [)PTH
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 }'v?Qq
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PaginationSupport的实例ps。 :>ST)Y@]w
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ps.getItems()得到已分页好的结果集 x&b-Na