Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 $h
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 NP/2gjp
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据这一功能,我设计了通用的抽象Bean基类和分页类支持,代码来 Darkj>$\
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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 5jk4k c
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分页支持类: 4 ETVyK|
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java代码: 2F]MzeW
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package com.javaeye.common.util; 6<6_W#
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import java.util.List; [V~bo/n
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publicclass PaginationSupport { YO61 pZY
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publicfinalstaticint PAGESIZE = 30; .?
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privateint pageSize = PAGESIZE; QI<3N
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privateList items; 64@s|m*
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privateint totalCount; st>t~a|T
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privateint[] indexes = newint[0]; }% *g\%L
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privateint startIndex = 0; ^(3k
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public PaginationSupport(List items, int /zKuVaC
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totalCount){ Yn/-m
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setPageSize(PAGESIZE);
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setTotalCount(totalCount); n66_#X
setItems(items); w8Yff[o
setStartIndex(0); 2)YLs5>W%
} u a-p^X`w
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public PaginationSupport(List items, int ^=j$~*(LmX
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totalCount, int startIndex){ 2_C.-;!
setPageSize(PAGESIZE); t~Ax#H
setTotalCount(totalCount); ikC;N5Sw
setItems(items); $9/r*@bu8d
setStartIndex(startIndex); Uan;}X7@
} v.MWO]L
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public PaginationSupport(List items, int )C[8#Q-:
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totalCount, int pageSize, int startIndex){ e[n>U@
setPageSize(pageSize);
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setTotalCount(totalCount); ]3G2mY;`"%
setItems(items);
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setStartIndex(startIndex); dj#<,e\
} 'Tn$lh
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publicList getItems(){ 'JydaF~>
return items; F`l1I=;
} Tym!7H2
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publicvoid setItems(List items){ (Jm_2CN7X
this.items = items; .dV!d u
} P06K0Fxf
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publicint getPageSize(){ Xs`/q}R
return pageSize; 4s~o
} xAI<<[-
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publicvoid setPageSize(int pageSize){ R[b?kT-%
this.pageSize = pageSize; @m6E*2Gg
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publicint getTotalCount(){ iMSS8J
return totalCount; j JW0a\0
} M:A7=rO~
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publicvoid setTotalCount(int totalCount){ q8U]Hyp(`
if(totalCount > 0){ +XsY*$O
this.totalCount = totalCount; 0F"xU1z,
int count = totalCount / z~F!zigNAc
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pageSize; fgNEq
if(totalCount % pageSize > 0) &{$\]sv
count++; wi!Ml4Sb
indexes = newint[count]; qYE -z(i
for(int i = 0; i < count; i++){ MSA*XDnN
indexes = pageSize * ]5^u^
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} VB Ce=<
}else{ 9 eP @} C6
this.totalCount = 0; "`lRX
} $Uzc
} lGxG$0`;;
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publicint[] getIndexes(){ bH&[O`vf
return indexes; vJYy` k^Y
} mFT[[Z#
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publicvoid setIndexes(int[] indexes){ !d ZHG
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this.indexes = indexes; &cZD{Z
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publicint getStartIndex(){ na <g
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return startIndex; +&|WC2#
} J6jrtLh
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publicvoid setStartIndex(int startIndex){ Q|:\
if(totalCount <= 0) 2+0'vIw}
this.startIndex = 0; @}#$<6|
elseif(startIndex >= totalCount) C0'Tua'
this.startIndex = indexes t0/fF'GZD
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[indexes.length - 1]; F`'e/
elseif(startIndex < 0) Fe:0nr9;
this.startIndex = 0; QGfU:
else{ ~W!sxM5(*
this.startIndex = indexes "Y4tt0I
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[startIndex / pageSize]; yt$V<8a
} nsYS0
} SZEX;M
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publicint getNextIndex(){ U1dz:OG>
int nextIndex = getStartIndex() + 'H:lR1(,
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pageSize; <Cm:4)~
if(nextIndex >= totalCount) \#
return getStartIndex(); W&)OiZN
else ?:~ `?
return nextIndex; BT>8
} R:zjEhH)
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publicint getPreviousIndex(){ Bm1yBKjO
int previousIndex = getStartIndex() - (V}DPA
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pageSize; XswEAz0=
if(previousIndex < 0) gQ h;4v
return0; jO3Z2/#
else FX 0^I 0
return previousIndex; vV,H@WK
} IYb@@Jzo
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} yD(0:g#
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抽象业务类 PKty'}KF
java代码: j'I$F1>Te
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/** b>Iqk
* Created on 2005-7-12
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*/ iE0A-;:5
package com.javaeye.common.business; ?&j[Rj0pH
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import java.io.Serializable; xLP yV&j-
import java.util.List; !zVuO*+
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import org.hibernate.Criteria; s+$l.aIO!
import org.hibernate.HibernateException; /k l0(='
import org.hibernate.Session; SzMh}xDh2
import org.hibernate.criterion.DetachedCriteria; -6aGcPq
import org.hibernate.criterion.Projections; QB7E:g&