Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 S:v]3G
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 ``nuw7\C:
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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 :UoZ`O~
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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 }N]|zCEj
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分页支持类: Pp7}|/
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java代码: >2x[ub%$L
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package com.javaeye.common.util; skh6L!6*<
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import java.util.List; v?,_SVgAi
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publicclass PaginationSupport { %{!*)V\
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publicfinalstaticint PAGESIZE = 30; !X$e;V"HX
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privateint pageSize = PAGESIZE; )'?3%$EM
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privateList items; e%uPZ >'q
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privateint totalCount; Z
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privateint[] indexes = newint[0]; 8~YhT]R=
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privateint startIndex = 0; q(p]6Ha|
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public PaginationSupport(List items, int 'h53:?~
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totalCount){ 3,DUT{2
setPageSize(PAGESIZE); :aI[
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setTotalCount(totalCount); 1Jg&L~Ws"
setItems(items); y2;uG2IS_g
setStartIndex(0); yDg`9q.ckm
}
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public PaginationSupport(List items, int %JeT,{
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totalCount, int startIndex){ 8iaP(*J
setPageSize(PAGESIZE); rz+)z:u
setTotalCount(totalCount); l
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setItems(items); JWoNP/v6
setStartIndex(startIndex); bW\OKI1
} (S$ziV
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public PaginationSupport(List items, int N_(qMW
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totalCount, int pageSize, int startIndex){ V*5 ~A[r
setPageSize(pageSize); X:+lD58
setTotalCount(totalCount); ]&w8"q
setItems(items); HR]*75}e
setStartIndex(startIndex); N9QHX
} \=Rw/[lR
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publicList getItems(){ P&@ 2DI3m
return items; i}"Eu<
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} 1O3"W;SR<:
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publicvoid setItems(List items){ A.vWGBR
this.items = items; }c|)i,bL
} 21Mr2-#z
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publicint getPageSize(){ C +S
return pageSize; FC[8kq>Hk
} j;}!Yn
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publicvoid setPageSize(int pageSize){ i,|2F9YH
this.pageSize = pageSize; `d]D=DtH
} ;}"!|
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publicint getTotalCount(){ DdDwMq
return totalCount; CzDJbvv]
} 8-]\C
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publicvoid setTotalCount(int totalCount){ 'qel3Fs"
if(totalCount > 0){ t M?3oO
this.totalCount = totalCount; :j feY
int count = totalCount / uU_lC5A|
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pageSize; 6+`+$s0
if(totalCount % pageSize > 0) whFaL}2C
count++; 12r]"?@|s
indexes = newint[count]; |:)UNb?R"O
for(int i = 0; i < count; i++){ C]H'z
indexes = pageSize * o+Cd\D69S
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} P5,X,-eG
}else{ <g9@iUOI
this.totalCount = 0; ]$7dkP
} 4:m/w!q$
} >wx1M1
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publicint[] getIndexes(){ N;N,5rxV
return indexes; Eci,];S7
} ZDffR:An
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publicvoid setIndexes(int[] indexes){ 8<#S:O4kA
this.indexes = indexes; U`*L` PM
} vfnVN@ 5
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publicint getStartIndex(){ slPLc
return startIndex; 7Qoy~=E
}
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publicvoid setStartIndex(int startIndex){ $K-od3h4=
if(totalCount <= 0) r*I u6
this.startIndex = 0; g+ZQ6Hz
elseif(startIndex >= totalCount) 4\Nt"#U)g
this.startIndex = indexes h4N%(?7
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[indexes.length - 1]; zI$24L9*
elseif(startIndex < 0) &n 1 \^:
this.startIndex = 0; hlIh(\JZ4s
else{ ~:PuKx
this.startIndex = indexes ?U^h:n
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[startIndex / pageSize]; 6|{$]<'
} {Kdr-aC
} P%%[_6<%M
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publicint getNextIndex(){ Rq,ST:
int nextIndex = getStartIndex() + *U{E[<k{
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pageSize; R\VM6>SN'S
if(nextIndex >= totalCount) X.YMb
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return getStartIndex(); L~Hgf/%5
else k uEB
return nextIndex; >wPMJ>
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} 0/Q"~H?%
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publicint getPreviousIndex(){ Z3jtq-y
int previousIndex = getStartIndex() - P. V #
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pageSize; BkO)hze
if(previousIndex < 0) C{"uz_Gh
return0; +|SvJ
else Po+tk5}''5
return previousIndex; c<T'_93
} VlLc[eVV
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} !Eof7LUE
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抽象业务类
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java代码: =2BB ~\G+
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/** W;^bc*a_
* Created on 2005-7-12 74hQ?Atw:
*/ "-tTN
package com.javaeye.common.business; P@RUopu,i
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import java.io.Serializable; vW\|%
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import java.util.List; W@:a3RJ
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import org.hibernate.Criteria; ":o1g5?
import org.hibernate.HibernateException; fUJ\W"qya
import org.hibernate.Session; pPezy:
import org.hibernate.criterion.DetachedCriteria; l}Fa-9_'
import org.hibernate.criterion.Projections; &R'%OFi
import OP-%t\sj>
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org.springframework.orm.hibernate3.HibernateCallback; (ex^=fv
import GA8cA)]zOD
Ul EP;
org.springframework.orm.hibernate3.support.HibernateDaoS k*;2QED
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upport; ilyQgEjC
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import com.javaeye.common.util.PaginationSupport; 1f.xZgO/2
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public abstract class AbstractManager extends BhMHT:m
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HibernateDaoSupport { 9hG+?
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privateboolean cacheQueries = false; i"rrM1/r
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privateString queryCacheRegion; CwV1~@{-
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publicvoid setCacheQueries(boolean yL&_>cV
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cacheQueries){ ;-G!jWt6Zi
this.cacheQueries = cacheQueries; B1&