Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 WYd9p; k
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 <HH\VG\H6
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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 Nj=0bg"Qg5
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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 {h0T_8L/
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分页支持类: @K\hgaQ
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java代码: -8:/My
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package com.javaeye.common.util; SA%uGkm:e
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import java.util.List; mwO9`AU;
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publicclass PaginationSupport { 13fyg7^JP
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publicfinalstaticint PAGESIZE = 30; *yYeqm
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privateint pageSize = PAGESIZE; ~rlPS#]o
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privateList items; wizLA0W
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privateint totalCount; p %hvDC
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privateint[] indexes = newint[0]; 8Y [4JXUK
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privateint startIndex = 0;
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public PaginationSupport(List items, int m-]F]c=)w<
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totalCount){ o:`^1
setPageSize(PAGESIZE); $}B&u )
setTotalCount(totalCount); SB,#y>Zv?
setItems(items); \%_sL#?
setStartIndex(0); hISYtNWjd"
} 'EC0|IT)c
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public PaginationSupport(List items, int Z-3("%_$/
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totalCount, int startIndex){ .|0$?w
setPageSize(PAGESIZE); 08/Tk+
setTotalCount(totalCount); ET(/h/r
setItems(items); 6Ev+!!znu
setStartIndex(startIndex); pnUL+UYeM
} .E;}.X
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public PaginationSupport(List items, int @(IA:6GN
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totalCount, int pageSize, int startIndex){ 5?.!A
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setPageSize(pageSize); MAQ-'s@
setTotalCount(totalCount); a:s$[+'Y
setItems(items); H(kxRPH4@]
setStartIndex(startIndex); lQxEiDIL
} F^&@[k7WW
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publicList getItems(){ qe/5'dw
return items; xeKm} MN]S
} S[{,+{b0
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publicvoid setItems(List items){ =&PO_t5)z
this.items = items; -`$J& YU
} loUZD=Ph
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publicint getPageSize(){ VVfTFi<
return pageSize; tMXNi\Bj
} TN<"X :x9
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publicvoid setPageSize(int pageSize){ yv: Op\;R
this.pageSize = pageSize; `|mV~F|
} NTSIClm}U
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publicint getTotalCount(){ JW"`i
return totalCount; &UO/p/a
} 2b Fr8FUt-
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publicvoid setTotalCount(int totalCount){ 5mZwg(si
if(totalCount > 0){ +pQ3bX
this.totalCount = totalCount; {XV'C@B
int count = totalCount / "~KTLf
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pageSize; ?Ss~!38
if(totalCount % pageSize > 0) Ucz=\dO1
count++; 2*]
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indexes = newint[count]; E33WT{H&_'
for(int i = 0; i < count; i++){ Fl*<N
indexes = pageSize * wk'&n^_br
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} @LSX@V
}else{ !#W3Q
this.totalCount = 0; 8"p rWAN
} \f=kQbM
} :B\$7+$v
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publicint[] getIndexes(){ ;|W:,a{kS
return indexes; BK
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} P@%L.y
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publicvoid setIndexes(int[] indexes){ hjhZ":I.
this.indexes = indexes; ^/#8 "
} U#<{RqY
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publicint getStartIndex(){ G[u{! 2RS
return startIndex; #K iqV6E
} aOQT-C[
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publicvoid setStartIndex(int startIndex){ tu/4
if(totalCount <= 0) 3o"l
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this.startIndex = 0; ,?`kYPZ
elseif(startIndex >= totalCount) O[z6W.
this.startIndex = indexes s,l*=<
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[indexes.length - 1]; vsQvJDna~
elseif(startIndex < 0) y=jZ8+M
this.startIndex = 0; *SlWA)9Y
else{ O@w_"TJP/z
this.startIndex = indexes hh2&FI
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[startIndex / pageSize]; }SyK)W5Y
} N/<c;"o
} }5}>B *
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publicint getNextIndex(){ d/awQXKe7
int nextIndex = getStartIndex() +
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pageSize; 9e}%2,
if(nextIndex >= totalCount) 7|"$YV'DM
return getStartIndex(); s
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else P"Z1K5>2L
return nextIndex; <*P)"G
} .9Dncsnf,`
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publicint getPreviousIndex(){ !DV0u)k(
int previousIndex = getStartIndex() - f zL5C2d
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pageSize; =h+-1zp{M^
if(previousIndex < 0) oa[O~z{~
return0; B]mMwqM#
else : #so"O
return previousIndex; +}:2DXy@
} P{Q$(rOe
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} c0w1
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抽象业务类 c>Ri6=C
java代码: jM-5aj[K
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/** FIu^Qd
* Created on 2005-7-12 \'|t>|zhp
*/ Vi0D>4{+
package com.javaeye.common.business; L>0Pur) [
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import java.io.Serializable; `DM)tm3&m
import java.util.List; Dd-a*6|x
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import org.hibernate.Criteria; P:%b[7
import org.hibernate.HibernateException; K}GRU)
import org.hibernate.Session; kpNp}b8']
import org.hibernate.criterion.DetachedCriteria; r`RLDN!`
import org.hibernate.criterion.Projections; {.DY\;Q
import WLta{A?
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org.springframework.orm.hibernate3.HibernateCallback; o`
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import nwqA\
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org.springframework.orm.hibernate3.support.HibernateDaoS sD&V_
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upport; CC3M7|eO3
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import com.javaeye.common.util.PaginationSupport; _A0X[}^K
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public abstract class AbstractManager extends <'7s3
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HibernateDaoSupport { TmM~uc7mj
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privateboolean cacheQueries = false; 9`? M-U
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privateString queryCacheRegion; u0g"x_3
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publicvoid setCacheQueries(boolean u,N<U t
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cacheQueries){ |x>5 T}
this.cacheQueries = cacheQueries; =^_a2_BBl
} 0"ooHP$1
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publicvoid setQueryCacheRegion(String q:iu
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queryCacheRegion){ )|AxQPd
this.queryCacheRegion = 5r~hs6H
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queryCacheRegion; 4 ?[1JN>
} E\cX
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publicvoid save(finalObject entity){ ^\Q%VTM
getHibernateTemplate().save(entity); %Nob B
} XD_!5+\H1
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publicvoid persist(finalObject entity){ i&DUlmt)f
getHibernateTemplate().save(entity); rR#wbDr5
} T7O)
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publicvoid update(finalObject entity){ !-
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getHibernateTemplate().update(entity); BglbQ'6p
} f|)~_JH
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publicvoid delete(finalObject entity){ zAJC-YC6
getHibernateTemplate().delete(entity); VwK7\jV
} =A$d)&
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publicObject load(finalClass entity, j#Lj<jX!xR
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finalSerializable id){ {k[dg0UV
return getHibernateTemplate().load xe3Jxo!U
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(entity, id); LX=v
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} Y4X`(\A
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publicObject get(finalClass entity, |+>U91!
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finalSerializable id){ ^gR~~t;@
return getHibernateTemplate().get CJs
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(entity, id); p1mAoVxR
} =wD&hDn4
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publicList findAll(finalClass entity){ aYWUwYB$
return getHibernateTemplate().find("from ap"pQ[t;
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} g@Y]$ey%A
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publicList findByNamedQuery(finalString k5+ Fxf
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namedQuery){ jtE'T}! d
return getHibernateTemplate U9awN&1([
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().findByNamedQuery(namedQuery); , E$f"
} t"e %'dFv
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publicList findByNamedQuery(finalString query, (<}?}{YX0
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finalObject parameter){ 0I2?fz)
return getHibernateTemplate 0V`~z-#
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publicList findByNamedQuery(finalString query, F"3'~6
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finalObject[] parameters){ 2^:iU{
return getHibernateTemplate P:1eWP
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().findByNamedQuery(query, parameters); &SPr#OkW
} `Ao"fRv#
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publicList find(finalString query){ wjT#D|soI
return getHibernateTemplate().find \]\ h,Y8
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(query); 7_rDNK@e
} |t;Ktl
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publicList find(finalString query, finalObject mGoC8t}iP
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parameter){ $v"CQD
return getHibernateTemplate().find w6^TwjjZ$
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(query, parameter); 'A1y~x#2B
} _)4zm
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public PaginationSupport findPageByCriteria j)juvat
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(final DetachedCriteria detachedCriteria){ (/t{z=
return findPageByCriteria LJt5?zQKrW
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); V|{~9^
} N%u4uLP5k
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public PaginationSupport findPageByCriteria z:)*Aobwv
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(final DetachedCriteria detachedCriteria, finalint \\d8ulu
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startIndex){ (dV7N
return findPageByCriteria T ~p>Ed 9
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(detachedCriteria, PaginationSupport.PAGESIZE, $d&7q5[
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startIndex); DLe>EU;vS
} ]J/;Xp
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public PaginationSupport findPageByCriteria 2<V`
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(final DetachedCriteria detachedCriteria, finalint L%pAEoSG
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pageSize, _LWMz=U=J/
finalint startIndex){ j2 >WHh
return(PaginationSupport) \fYPz }wt
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getHibernateTemplate().execute(new HibernateCallback(){ ?4R q +
publicObject doInHibernate OXX D}-t
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(Session session)throws HibernateException { $ylxl"Y
Criteria criteria = a<((\c_8G
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detachedCriteria.getExecutableCriteria(session); QP@@h4J^
int totalCount = Y$qjQ 1jF+
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((Integer) criteria.setProjection(Projections.rowCount E!,jTaZz
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()).uniqueResult()).intValue(); OSC_-[b-
criteria.setProjection CwO$EL:[`
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(null); kkj_k:Eah
List items = 5iGz*_
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criteria.setFirstResult(startIndex).setMaxResults s>TC~d82
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(pageSize).list(); ^[2siG
PaginationSupport ps = =v{ R(IX%
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new PaginationSupport(items, totalCount, pageSize, H;FzWcm
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startIndex); Z/;8eb*B7
return ps; ;*20b@
} %XXjQ5p
}, true); |%(qaPA1
} Jp~[Dm
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public List findAllByCriteria(final #"o`'5
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DetachedCriteria detachedCriteria){ of`WP
return(List) getHibernateTemplate uU+?:C
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().execute(new HibernateCallback(){ }<