Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 5d^sA;c
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 Y=I'czg
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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 iy!=6
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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 Uz8ff
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分页支持类: -f^tE,-
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java代码: eJ-xsH*8
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package com.javaeye.common.util; o#Dk&
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import java.util.List; `UaD6Mc<Mz
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publicclass PaginationSupport { u4?L 67x
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publicfinalstaticint PAGESIZE = 30; ^
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privateint pageSize = PAGESIZE; BwpqNQN
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privateList items; lb3bm)@:
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privateint totalCount; _D&598 xx
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privateint[] indexes = newint[0]; /C:gKy4
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privateint startIndex = 0; '<)n8{3Q5w
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public PaginationSupport(List items, int L`TLgH&?R
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totalCount){ rZ$O?K
setPageSize(PAGESIZE); Of#u
setTotalCount(totalCount); ~,Ix0h+H+M
setItems(items); 4F:\-O
setStartIndex(0); K@]4g49A/j
} T&bYa`f]
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public PaginationSupport(List items, int v ;{#Q&(
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totalCount, int startIndex){ Gb6 'n$g
setPageSize(PAGESIZE); d7y[0<xM
setTotalCount(totalCount); Bkc4TO
setItems(items); >Cp0.A:UC#
setStartIndex(startIndex); 2l'6.
}
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public PaginationSupport(List items, int g:@#@1rB6
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totalCount, int pageSize, int startIndex){ <xm7qmqI
setPageSize(pageSize); %wy.TN
setTotalCount(totalCount); h;"4+uw
setItems(items); ?l{nk5,?-Y
setStartIndex(startIndex); C{rcs'
} hi(;;C9
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publicList getItems(){ ADzhNfS
return items; 'IQ0{&EI
} H*R"ntI?w
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publicvoid setItems(List items){ tDcT%D {:
this.items = items; uGG t\.$]s
} C}Cs8eUn
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publicint getPageSize(){ \}b%E'+_T
return pageSize; vvMT}-!
} !Ai@$tl[S
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publicvoid setPageSize(int pageSize){ FW4<5~'
this.pageSize = pageSize; W{+2/P
} 3nQ`]5.Q
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publicint getTotalCount(){ Qw*|qGvy^
return totalCount; C&%_a~
} cm+Es6;
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publicvoid setTotalCount(int totalCount){ Wac&b
if(totalCount > 0){ J*M>6Q.)
this.totalCount = totalCount; %tGO?JMkd
int count = totalCount / ^yp{32
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pageSize; Ti5-6%~&
if(totalCount % pageSize > 0) r,p%U!S<hV
count++; ZY+qA
indexes = newint[count]; oMa6(3T?E
for(int i = 0; i < count; i++){ ?6U0PChy
indexes = pageSize * 73;GW4,
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} 99QU3c<.
}else{ 3=j"=-=
this.totalCount = 0; ~f98#43
} kl:Bfs)b
} /U9"wvg
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publicint[] getIndexes(){ h:|qC`}
return indexes; wmLs/:~
} VI86KJu
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publicvoid setIndexes(int[] indexes){ 4tBYR9|
this.indexes = indexes; =7eV/3
}
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publicint getStartIndex(){ f-Z/tfC
return startIndex; S,he6zS
} t{{QE:/
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publicvoid setStartIndex(int startIndex){ %'pgGC"|
if(totalCount <= 0) [4f{w%~^
this.startIndex = 0; j\M?~=*w
elseif(startIndex >= totalCount) (GfZ*
this.startIndex = indexes =Xr.'(U
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[indexes.length - 1]; bk[!8-b/a
elseif(startIndex < 0) NzvXN1_%
this.startIndex = 0; k<?b(&`J
else{ dy[X3jQB
this.startIndex = indexes (sZ"iGn%
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[startIndex / pageSize]; ckCE1e>s
} Q=$2c[Uk
} J|7 3.&B
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publicint getNextIndex(){ gB33?
int nextIndex = getStartIndex() + ;$g?T~v7
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pageSize; f/?P514h
if(nextIndex >= totalCount) r~['VhI!;E
return getStartIndex(); sW\!hW1*x
else S_H+WfIHV'
return nextIndex; RViAwTvY
} 8}:nGK|kx
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publicint getPreviousIndex(){ 5b7RYV
int previousIndex = getStartIndex() - ]`WJOx4
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pageSize; VIf.q)_k
if(previousIndex < 0) iy.\=Cs$N
return0; &rR2,3r=
else N;%6:I./
return previousIndex; f$QNg0v
} v3>UV8c'
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抽象业务类 w0unS`\4
java代码: r3?o9D>
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/** >9J:Uo1z
* Created on 2005-7-12 Tlr v={
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package com.javaeye.common.business; .=;
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import java.io.Serializable; ~gt@P
import java.util.List; K*d Cc}:`
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import org.hibernate.Criteria; A3*!"3nU
import org.hibernate.HibernateException; %;!.n{X
import org.hibernate.Session; _)-o1`*-
import org.hibernate.criterion.DetachedCriteria; mX|ojZ
import org.hibernate.criterion.Projections; q5S9C%b
import q@2siI~W
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org.springframework.orm.hibernate3.HibernateCallback; /Z4et'Lo
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org.springframework.orm.hibernate3.support.HibernateDaoS <OPArht
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upport; }<:}XlwT%
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import com.javaeye.common.util.PaginationSupport; poFg1
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public abstract class AbstractManager extends _SkLYL!=9
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HibernateDaoSupport { }ad|g6i`
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privateboolean cacheQueries = false; R G`1en
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privateString queryCacheRegion; P0b7S'a4!
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publicvoid setCacheQueries(boolean Kc(FX%3LU
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cacheQueries){ :BTq!>s
this.cacheQueries = cacheQueries; syK^<xa
} TS5Q1+hWHV
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publicvoid setQueryCacheRegion(String &+R?_Ooibk
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queryCacheRegion){ F6dP,(
this.queryCacheRegion = L/^I*p,
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queryCacheRegion; >o,TZc\
} E4xa[iZ
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publicvoid save(finalObject entity){ LreP4dRe
getHibernateTemplate().save(entity); @=kSo
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} as=LIw}Q4
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publicvoid persist(finalObject entity){ DlNX 3
getHibernateTemplate().save(entity); igAtRX%Qx
} _J [P[(ab
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publicvoid update(finalObject entity){ 7 xa>
getHibernateTemplate().update(entity); Q NVa?'0"Y
} F4{IEZ
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publicvoid delete(finalObject entity){ S21,VpW\
getHibernateTemplate().delete(entity); FxtI"g\0
} POR\e|hRT]
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publicObject load(finalClass entity, Xn\jO>[Ef
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finalSerializable id){ :eLVC7'
return getHibernateTemplate().load WMg~Y"W
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(entity, id); {[ >Kob1
} ^sg,\zD 'X
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publicObject get(finalClass entity, W*w3[_"sr
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finalSerializable id){ tklH@'q
return getHibernateTemplate().get \D&KC,i5f
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(entity, id); ~^b/(
} u>/ TE
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publicList findAll(finalClass entity){ t&Og $@
return getHibernateTemplate().find("from BL58] P84
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" + entity.getName()); >)Tqt!?
} H 7
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publicList findByNamedQuery(finalString @ur+;IK$
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namedQuery){ 7j)8Djzp|
return getHibernateTemplate sUm'
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().findByNamedQuery(namedQuery); B,fo(kG
} &
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publicList findByNamedQuery(finalString query, D7qOZlX16
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finalObject parameter){ Fea(zJ_
return getHibernateTemplate /JU.?M35
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().findByNamedQuery(query, parameter); *k>n<p3dd
} Q)z8PQl O
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publicList findByNamedQuery(finalString query, -n5)w*b,
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finalObject[] parameters){ EAby?51+
return getHibernateTemplate F1Bq$*'N$w
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().findByNamedQuery(query, parameters); w:l
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} ?@
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publicList find(finalString query){ _oDz-
return getHibernateTemplate().find vgN&K@hJ
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(query); w.-!UD9/.x
} -RK- Fu<e
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publicList find(finalString query, finalObject m<2M4u
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parameter){ -;k+GrLr^
return getHibernateTemplate().find _2 osV[e
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(query, parameter); SOvF[,+
} ZWp(GC1NA
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public PaginationSupport findPageByCriteria t.\dpBq
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(final DetachedCriteria detachedCriteria){ %BB%pC
return findPageByCriteria TrR8?-
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); v1,oilL
} yyy|Pw4:Z
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public PaginationSupport findPageByCriteria 6Sn .I1Wy
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(final DetachedCriteria detachedCriteria, finalint 1D!<'`)AY
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startIndex){ LvYB7<zk>
return findPageByCriteria m/EFHS49
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(detachedCriteria, PaginationSupport.PAGESIZE, J`1rJ
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startIndex); t}tEvh
} G?Hdq;
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public PaginationSupport findPageByCriteria /fV;^=:8c
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(final DetachedCriteria detachedCriteria, finalint T:W4$P
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pageSize, 3>VL}Ui}
finalint startIndex){ ijx0gh`~
return(PaginationSupport) 0>Z_*U~6
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getHibernateTemplate().execute(new HibernateCallback(){ Aj]V`B:65
publicObject doInHibernate FH+s s!
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(Session session)throws HibernateException { ."y1_dDql
Criteria criteria = wZZ t
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detachedCriteria.getExecutableCriteria(session); L5:$U>H(
int totalCount = !0mI;~q| F
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((Integer) criteria.setProjection(Projections.rowCount -_eLf#3
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()).uniqueResult()).intValue(); yY&I