Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 sk:B;.z
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 WCk. K
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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 \"L0d1DK)
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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 Q`;eI
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分页支持类: [#G*GAa6*
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java代码: @J qo'\~&
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package com.javaeye.common.util; mC-wPi8
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import java.util.List; LylCr{s7
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publicclass PaginationSupport { z;/8R7L&
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publicfinalstaticint PAGESIZE = 30; 'qG-)2
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privateint pageSize = PAGESIZE; o=Mm=;H
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privateList items; *XYp~b
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privateint totalCount; .LnknjC
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privateint[] indexes = newint[0]; ^
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privateint startIndex = 0; \~Ml<3Zd:
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public PaginationSupport(List items, int IDpx_
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totalCount){ .wlKl[lE2
setPageSize(PAGESIZE); x;/dSfv_
setTotalCount(totalCount); >Y+m54EE
setItems(items); gNDMJ^`
setStartIndex(0); t.
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} =8rNOi
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public PaginationSupport(List items, int Mc(|+S@w'
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totalCount, int startIndex){
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setPageSize(PAGESIZE); 6V@_?a-K
setTotalCount(totalCount); [f[Wz{Q#Y
setItems(items); M"qS#*{
setStartIndex(startIndex); T5I#7LN#
} %""h:1/S
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public PaginationSupport(List items, int } *C
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totalCount, int pageSize, int startIndex){ >,_0Mem2Rr
setPageSize(pageSize); EQw7(r|v:
setTotalCount(totalCount); Di}M\!-[
setItems(items); F?cwIE\J
setStartIndex(startIndex); e{XzUY6
} Rh$+9w
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publicList getItems(){ wf\7sz
return items; %3"U|Za+
} ;mGPX~38
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publicvoid setItems(List items){ lkR^2P
this.items = items; 0L ,!o[L*
} XJy.xI>;
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publicint getPageSize(){ ukc
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return pageSize; Tow! 5VAM
} ~_F;>N~
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publicvoid setPageSize(int pageSize){ 0*oavY*
this.pageSize = pageSize; l%?4L/J)#
}
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publicint getTotalCount(){ Q
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return totalCount; Dfc%
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} x
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publicvoid setTotalCount(int totalCount){ '.>y'=
if(totalCount > 0){ >msQ@Ch
this.totalCount = totalCount; )54a' Hp
int count = totalCount / kUT^o
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pageSize; G]EI!-y
if(totalCount % pageSize > 0) 0S'@(p[A
count++; ~Cg7
indexes = newint[count]; ZitmvcMk
for(int i = 0; i < count; i++){ ~ISY( &
indexes = pageSize * :xbj&
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} (\r^0>H
}else{ /0fHkj/J=B
this.totalCount = 0; 9vwm
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} [F;\NJp6?^
} .}Ys+d1b9c
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publicint[] getIndexes(){ F#RN m5
return indexes; x2r.4
} V}7)>i$A
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publicvoid setIndexes(int[] indexes){ t.VVE:A^%
this.indexes = indexes; FKL@,>!<e
} h| `R[
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publicint getStartIndex(){ fR+{gazk
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return startIndex; l?V#;
} A"s?;hv\fS
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publicvoid setStartIndex(int startIndex){ B.;@i;7L
if(totalCount <= 0) x*=m'IM[
this.startIndex = 0; @uN+]e+3
elseif(startIndex >= totalCount) "USzk7=&.
this.startIndex = indexes %6Vb1?x
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[indexes.length - 1]; jvD_{r
elseif(startIndex < 0) R#8cOmZ
this.startIndex = 0; )PYh./_2
else{ (NDC9Lls
this.startIndex = indexes I|>.&nb
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[startIndex / pageSize]; C&%NO;Ole
} gyV`]uqG
} 7N@[Rtv
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publicint getNextIndex(){ [wiB1{/Ls.
int nextIndex = getStartIndex() + UL#:!J/34
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pageSize; quC$<Y
if(nextIndex >= totalCount) GO@<?>K
return getStartIndex();
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else ZU`~@.`i
return nextIndex; BYHyqpP9
} 4GeN<9~YS
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publicint getPreviousIndex(){ ]@Z
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int previousIndex = getStartIndex() - &(l.jgqg&
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pageSize; ,Shzew+
if(previousIndex < 0) wq!9wk9
return0; :hW(2=%
else tX@y ]"
return previousIndex; _T~&kwe
} MU2kA&LH
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} 1>Vq<z
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抽象业务类 Nq\)o{<1
java代码: 92.Rjz;=9?
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/** v<)&JlR
* Created on 2005-7-12 C.LAr~P
*/ U 0~BcFpD
package com.javaeye.common.business; {D(l#;,iX2
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import java.io.Serializable; MtF0/aT
import java.util.List; lcy+2)+
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import org.hibernate.Criteria; -)Vy)hD,
import org.hibernate.HibernateException; ZqpK}I
import org.hibernate.Session; w`+-xT%
import org.hibernate.criterion.DetachedCriteria; v*.iNA;&i
import org.hibernate.criterion.Projections; <RbfW'<G
import V?)V2>]
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org.springframework.orm.hibernate3.HibernateCallback; C?]eFKS."
import #.fJ
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org.springframework.orm.hibernate3.support.HibernateDaoS D)l\zs%ie
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upport; #Dz"g_d
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import com.javaeye.common.util.PaginationSupport; Vkd_&z7
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public abstract class AbstractManager extends xx7&y!_
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HibernateDaoSupport { NG:4Q.G1g
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privateboolean cacheQueries = false; (JnEso-V
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privateString queryCacheRegion; s6(md<r
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publicvoid setCacheQueries(boolean QlR~rFs9t
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cacheQueries){ C2=PGq
this.cacheQueries = cacheQueries; iQG]v[$
} matm>3n
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publicvoid setQueryCacheRegion(String h)j#?\KYm9
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queryCacheRegion){ <gH-`3J6
this.queryCacheRegion = 0pW;H|h
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queryCacheRegion; _1Ne+"V
} f?GoBh<
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publicvoid save(finalObject entity){ i[FYR;C
getHibernateTemplate().save(entity); tSoF!@6
} y:$qX*+9e
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publicvoid persist(finalObject entity){ q+<,FdG
getHibernateTemplate().save(entity);
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} r2i]9>w
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publicvoid update(finalObject entity){ J&JZYuuf
getHibernateTemplate().update(entity); @W
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} zw$\d1-+h
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publicvoid delete(finalObject entity){ ePv`R'#
getHibernateTemplate().delete(entity);
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} WS.g`%
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publicObject load(finalClass entity, `U\l: ~]e
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finalSerializable id){ KC2Z@
return getHibernateTemplate().load 8'TIDu
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(entity, id); fi ~@J`
} )t7MD(
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publicObject get(finalClass entity, '/0e!x/8
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finalSerializable id){ L2}<2
return getHibernateTemplate().get 7 H:y=?X6
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(entity, id); 4@<wN \'
} xE!0p EHd
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publicList findAll(finalClass entity){ ~=[5X,Ta
return getHibernateTemplate().find("from ~!7x45(1#
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" + entity.getName()); ;/?w-)n?
} t>*(v#WeZ
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publicList findByNamedQuery(finalString Xppb|$qp4H
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namedQuery){ dhJ=+Fz"w
return getHibernateTemplate D/4]r@M2c
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().findByNamedQuery(namedQuery); iTO Y
} $XMpC{
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publicList findByNamedQuery(finalString query, Pw7uxN`
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finalObject parameter){ }opMf6`w
return getHibernateTemplate 1|H4]!7kE
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().findByNamedQuery(query, parameter); d^!3&y&
} RIO?rt;
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publicList findByNamedQuery(finalString query, VGxab;#,:3
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finalObject[] parameters){ VQG$$McJ
return getHibernateTemplate @H+L1H%9n
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().findByNamedQuery(query, parameters); 7j&EQm5\9
} ME]89 T&
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publicList find(finalString query){ -J#RGB{7
return getHibernateTemplate().find -m>3@"q
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(query); \ )>#`X
} `jTB9A"
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publicList find(finalString query, finalObject >g~IP>
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parameter){
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return getHibernateTemplate().find }oSgx
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(query, parameter); h# Z,ud_
} }m5()@Q}a
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public PaginationSupport findPageByCriteria M3F1O6=4j
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(final DetachedCriteria detachedCriteria){ E.ji;5
return findPageByCriteria #9.%>1{6Y
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); BtKor6ba
} Hy,""Py
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public PaginationSupport findPageByCriteria Zz/p'3?#
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(final DetachedCriteria detachedCriteria, finalint ;~d$OM
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startIndex){
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return findPageByCriteria Sj|tR[SAoD
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(detachedCriteria, PaginationSupport.PAGESIZE, XE2rx2k
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startIndex); e"bzZ!c&~V
} L$s ENOm
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public PaginationSupport findPageByCriteria J-uQF|
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(final DetachedCriteria detachedCriteria, finalint 2]5Li/
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pageSize, -{9mctt/gE
finalint startIndex){ `^'fS@VA
return(PaginationSupport) In1n.oRFn^
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getHibernateTemplate().execute(new HibernateCallback(){ WvfM.D!
publicObject doInHibernate g"kI1^[nj
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(Session session)throws HibernateException { }' Y)"8AIA
Criteria criteria = v'Ehr**]+
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detachedCriteria.getExecutableCriteria(session); C8T0=o/-`
int totalCount = p8@&(+z
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((Integer) criteria.setProjection(Projections.rowCount >qr/1mW
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()).uniqueResult()).intValue(); ='4)E6ea?
criteria.setProjection /EP
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(null); chKEGosbF
List items = "p|.[d
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criteria.setFirstResult(startIndex).setMaxResults { gs$pBu
f8N*[by
(pageSize).list(); xLi3|^q
PaginationSupport ps = p8)R#QWz9
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new PaginationSupport(items, totalCount, pageSize, JN` $Fq+
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startIndex); |mHf7gCX
return ps; l:JVt`A4?
} ;fW~Gb?"
}, true); yTK3eK
} G}+@C]
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public List findAllByCriteria(final hwL`9.w
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DetachedCriteria detachedCriteria){ u7RlxA:
return(List) getHibernateTemplate sP2Uj
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().execute(new HibernateCallback(){ W}3%BWn
publicObject doInHibernate %D:VcY9OC
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(Session session)throws HibernateException { Cojs;`3iF:
Criteria criteria = t^zE^:06
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detachedCriteria.getExecutableCriteria(session); tvFe_*Ck
return criteria.list(); d4^x,hzV
} '7oCWHq[
}, true); ITqAy1m@C
} GK1nGdT]
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public int getCountByCriteria(final 'v
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DetachedCriteria detachedCriteria){ Y`eF9Im,
Integer count = (Integer) "!AtS
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getHibernateTemplate().execute(new HibernateCallback(){ qGMU>J.;c
publicObject doInHibernate Xa#.GrH6
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(Session session)throws HibernateException { cb0rkmO
Criteria criteria = Ay 4P_>^
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detachedCriteria.getExecutableCriteria(session); /!?Tv8TPp
return ;|?_C8
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criteria.setProjection(Projections.rowCount AzZhIhWl">
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()).uniqueResult(); )AR-b8..o
} :A @f[Y'9
}, true); )[ZXPD
return count.intValue(); T$R#d&t
} VV}"zc^
} f+s)A(?3
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用户在web层构造查询条件detachedCriteria,和可选的 3%GsTq2o
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 XxdD)I
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