Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 n$aA)"A #
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 A!vCb
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据这一功能,我设计了通用的抽象Bean基类和分页类支持,代码来 yIb,,!y9{
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自于Quake Wang的javaeye-core包的相应类,然后又做了很多修改 5[{*{^F4
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分页支持类: =H8 xSJLh
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java代码: 0GDvwy D1
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package com.javaeye.common.util; FA90`VOWYU
OquAql:
import java.util.List; L0%hnA@
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publicclass PaginationSupport {
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publicfinalstaticint PAGESIZE = 30; g`k?AM\
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privateint pageSize = PAGESIZE; xw<OLWW
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privateList items; `N/RHb%
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privateint totalCount; pWE `x|J
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privateint[] indexes = newint[0]; "tS'b+SJ-S
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privateint startIndex = 0; .w6eJ4]
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public PaginationSupport(List items, int KyP)Qzp
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totalCount){ 1on'^8]0
setPageSize(PAGESIZE); jx_4B%kzq
setTotalCount(totalCount); V+wH?H=
setItems(items); bVr*h2p
setStartIndex(0); 17g^ALs
} O(H1 P[
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public PaginationSupport(List items, int 3b[jwCt
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totalCount, int startIndex){ (y4#.vZh:
setPageSize(PAGESIZE); \'?#i@O
setTotalCount(totalCount); h7_)%U<J2
setItems(items); R@T6U:1
setStartIndex(startIndex); O';ew)tI
} Ek.&Sf$cd'
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public PaginationSupport(List items, int 9vGs;
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totalCount, int pageSize, int startIndex){ Md;/nJO~{
setPageSize(pageSize); {#Q\z>
setTotalCount(totalCount); 1@sM1WMX
setItems(items); jkrx]`A{~
setStartIndex(startIndex); &$fbP5uAZ
} R
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publicList getItems(){ =)<3pG O
return items; MXAEX2xmme
} h!]"R<QQdu
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publicvoid setItems(List items){ %I4zQiJ%
this.items = items; nZvU'k:
} cHvF* A
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publicint getPageSize(){ ddpl Pzm#
return pageSize; CUmH,`hu
} (7q^FtjA#
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publicvoid setPageSize(int pageSize){ H"YL
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this.pageSize = pageSize; o$bUY7_
} cz.3|Lby
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publicint getTotalCount(){ XdIah<F2
return totalCount; b6W#SpCF
} =&NOHT>
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publicvoid setTotalCount(int totalCount){ NtZ6$o<Y
if(totalCount > 0){ B%b_/F]e
this.totalCount = totalCount; 3XVk#)lw
int count = totalCount / @&R1wr1>I5
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pageSize; !]DuZ=
if(totalCount % pageSize > 0) U~QMR-bz
count++; gL]'B!dGd
indexes = newint[count]; Gp1EJ2d8
for(int i = 0; i < count; i++){ _nX%#/{
indexes = pageSize * Y1r,2 k
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} 8W{~wg`
}else{ gX/NtO%
this.totalCount = 0; m "]!I~jd
} ER<eX4oU
} i:k-"
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publicint[] getIndexes(){ .~<]HAwq
return indexes; hAa[[%wPhU
} _7 `E[&v
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publicvoid setIndexes(int[] indexes){ p":@>v?
this.indexes = indexes; #:W%,$9\P
} SKxe3
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publicint getStartIndex(){ `@\^m_!}
return startIndex; u%aFb*
} 44Qk;8*
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publicvoid setStartIndex(int startIndex){ PN9^[X
if(totalCount <= 0) .\4l'THn,0
this.startIndex = 0; yM17H\ =
elseif(startIndex >= totalCount) \*9Ua/H
this.startIndex = indexes T{;=#rG<
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[indexes.length - 1]; J" wKR y
elseif(startIndex < 0) nk>8SW^
this.startIndex = 0; P8]ORQ6ZF
else{ iE+6UK
this.startIndex = indexes K051usm
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[startIndex / pageSize]; pg5&=
} Q
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} \d$Rd")w
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publicint getNextIndex(){ g`.{K"N>!
int nextIndex = getStartIndex() + 0w+5'lOg
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pageSize; 'W+i[Ep5Q
if(nextIndex >= totalCount) JQH7ZaN
return getStartIndex(); hJ4S3b
else s!i:0} U
return nextIndex; \@:j
} /6smVz@O
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publicint getPreviousIndex(){ +|M{I= 8
int previousIndex = getStartIndex() - PgTDjEo
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pageSize; >Ban?3{
if(previousIndex < 0) `+Xe'ey
return0; {[N?+ZJD*L
else uh1S
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return previousIndex; /xF 9:r
} wU.'_SBfB
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} .2/,XwIr
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抽象业务类 #[Z<