Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 @R=gJ:&a
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 jsSxjf;O
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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 "J]_B
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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 @Md%gEh;&
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分页支持类: "}UJ~ j).
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java代码: 27*u^N*z@
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package com.javaeye.common.util; P"0S94o:5J
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import java.util.List; '~i}2e.
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publicclass PaginationSupport { P0J3ci}^
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publicfinalstaticint PAGESIZE = 30; <va3L y)c&
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privateint pageSize = PAGESIZE; v8"plx=3
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privateList items; Ev;HV}G
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privateint totalCount; hoI?,[@F
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privateint[] indexes = newint[0]; @-bX[}.
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privateint startIndex = 0; C.V")D=
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public PaginationSupport(List items, int I_@\O!<y}
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totalCount){ e Ll+F%@
setPageSize(PAGESIZE); |ofegO}W7
setTotalCount(totalCount); -x2/y:q `
setItems(items); 5k.NZ
setStartIndex(0); eRQ}`DjTk
} 7
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public PaginationSupport(List items, int trmCIk&Fkj
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totalCount, int startIndex){ 2?ac\c6"
setPageSize(PAGESIZE); ]Mi
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setTotalCount(totalCount); ?P[uf
setItems(items); Z^,C><Yt
setStartIndex(startIndex); 9ctvy?53H
} fk4s19;?
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public PaginationSupport(List items, int egboLqn
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totalCount, int pageSize, int startIndex){ /2-S/,a
setPageSize(pageSize); v!?bEM3D
setTotalCount(totalCount); n'=-bj`
setItems(items); (&0%![j&
setStartIndex(startIndex); A_1cM#4
} d_=@1JM>
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publicList getItems(){ GwxxW
return items; |cStN[97%
} }$3eRu +
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publicvoid setItems(List items){ j?%^N\9
this.items = items; '/U[ ui0{
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publicint getPageSize(){ <y=VDb/
return pageSize; `,d*>
} X=_pQ+j`^
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publicvoid setPageSize(int pageSize){ gO%#'Eb2
this.pageSize = pageSize; ,ii*[{X?
} C%d\DuJ5'~
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publicint getTotalCount(){ $A"kHS7T
return totalCount; KJ<7aZ
} y0cHs|8
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publicvoid setTotalCount(int totalCount){ 9Y!N\-x`
if(totalCount > 0){ /
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this.totalCount = totalCount; 84^'^nd
int count = totalCount / cjt<&b*
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pageSize; 'HTr02riY
if(totalCount % pageSize > 0) sHD8#t^{
count++; u
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indexes = newint[count]; YO7Y1(`
for(int i = 0; i < count; i++){ Wr Ht
indexes = pageSize * BDSZ '
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} !spp*Q)#\
}else{ Ig75bZz
this.totalCount = 0; occ^bq
} T%~w~stW
} 01N"
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publicint[] getIndexes(){ {'VP_ZS1v
return indexes; r(xh5{^x
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publicvoid setIndexes(int[] indexes){ 1>P[3Y@}
this.indexes = indexes; +aaj3m
} 73B,I 0U
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publicint getStartIndex(){ >nV~5f+
return startIndex; A^:[+PJHN
} E^w2IIw
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publicvoid setStartIndex(int startIndex){ 0"7%*n."2
if(totalCount <= 0) I|69|^
this.startIndex = 0; D/)wg$MI
elseif(startIndex >= totalCount) l+!!S"=8)~
this.startIndex = indexes KBJw7rra
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[indexes.length - 1]; 6yk=4l\
elseif(startIndex < 0) 51j5AbFQ"
this.startIndex = 0; )QYg[<e6
else{ )[RLCZ
this.startIndex = indexes koOkm:(,
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[startIndex / pageSize]; r/zuo6"5
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publicint getNextIndex(){ D\|$!i}
int nextIndex = getStartIndex() + m=D2|WA8
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pageSize; YoyJnl.?u
if(nextIndex >= totalCount) @_s`@,=
return getStartIndex(); ws8@yr<R
else I?`}h}7.
return nextIndex; P^V,"B8t
} t80s(e
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publicint getPreviousIndex(){ V/|).YG2
int previousIndex = getStartIndex() - :T^!<W4
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pageSize; VP0q?lh
if(previousIndex < 0) MmiC%"7wt
return0; ^mxOQc !
else ZoX24C'
return previousIndex; xxjg)rVuy
} xC N6?
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} _M'WTe
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抽象业务类 |vW(;j6
java代码: $pW6a %7
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/** O/g|E47
* Created on 2005-7-12 \f| Hk*@
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package com.javaeye.common.business; ?bFP'.
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import java.io.Serializable; %smQ`u|
import java.util.List; ^(z7?T
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import org.hibernate.Criteria; .OhpItn
import org.hibernate.HibernateException; m 2c>RCq
import org.hibernate.Session; W\]bh'(
import org.hibernate.criterion.DetachedCriteria; eu=G[>
import org.hibernate.criterion.Projections; 1 &G0;
import |OW/-&)
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org.springframework.orm.hibernate3.HibernateCallback; 337y,;
import &L7u//
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org.springframework.orm.hibernate3.support.HibernateDaoS Br/qOO:n$}
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upport; _N8Tu~lqV
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import com.javaeye.common.util.PaginationSupport; G!]%xFwYa
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public abstract class AbstractManager extends 6Gt~tlt:L
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HibernateDaoSupport { ]vj.s/F~
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privateboolean cacheQueries = false; nW)-bAV<
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privateString queryCacheRegion; 'Br:f_}
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publicvoid setCacheQueries(boolean ]5(T{
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cacheQueries){ ed3d 6/%HR
this.cacheQueries = cacheQueries; pypW
} gut[q
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publicvoid setQueryCacheRegion(String <//82j+px
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queryCacheRegion){ mL5 Nu+#
this.queryCacheRegion = j
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queryCacheRegion; vjo@aY.x
} j^4KczJl
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publicvoid save(finalObject entity){ nsT]Yxo%M
getHibernateTemplate().save(entity); 6yDj1PI
} g%C!)UbT
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publicvoid persist(finalObject entity){ s|40v@M
getHibernateTemplate().save(entity); |W't-}yf
} }iGpuoXT`
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publicvoid update(finalObject entity){ n oWjZ
getHibernateTemplate().update(entity); /"~ D(bw0=
} ZtzSG@f
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publicvoid delete(finalObject entity){ 3C:!\R
getHibernateTemplate().delete(entity); P:~Xaz\F
} MHF31/g\
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publicObject load(finalClass entity, M.DU^-7
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finalSerializable id){ cL+--$L
return getHibernateTemplate().load 0 QzUcr)3+
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(entity, id); iJ8 5okv'
} tKr.{#)
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publicObject get(finalClass entity, g(X-]/C{
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finalSerializable id){ ,(1n(FZ
return getHibernateTemplate().get !yUn|v>&p
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(entity, id); ~Onj|w7
} 72i]`
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publicList findAll(finalClass entity){ ]YQ!i@Y
return getHibernateTemplate().find("from {J aulg
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" + entity.getName()); Vki'pAN
} 5,Q3#f~!
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