Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 W0 n?S
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 IW{}l=D/
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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 a7fFp9l!
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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 \`:nmFO(9
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分页支持类: 1o8C4?T&
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java代码: Hh1]\4D,4
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package com.javaeye.common.util; ^cnTZzT#Q
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import java.util.List; _t/~C*=:=
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publicclass PaginationSupport { P{K;vEp
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publicfinalstaticint PAGESIZE = 30; JE*d-
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privateint pageSize = PAGESIZE; i<b-$9
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privateList items; T\wfYuc&X
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privateint totalCount; rHa*WA;TE
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privateint[] indexes = newint[0]; L+X:M/)
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privateint startIndex = 0; "OO)m](w
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public PaginationSupport(List items, int PrKH{nyJk
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totalCount){ =o5|W'>`
setPageSize(PAGESIZE); S0'
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setTotalCount(totalCount); S
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setItems(items); "}x%5/(
setStartIndex(0); &~aS24c
} `x]`<kS;
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public PaginationSupport(List items, int -hY@r 7y
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totalCount, int startIndex){ aJ"m`5]=%
setPageSize(PAGESIZE); *N&~Uq^
setTotalCount(totalCount); SaIY-PC
setItems(items); |E9'ii&?B
setStartIndex(startIndex); ^)UX#D3b
} 6Vj=SYK
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public PaginationSupport(List items, int g.*DlD%%
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totalCount, int pageSize, int startIndex){ CUN1.i<pk8
setPageSize(pageSize); .]e_je_
setTotalCount(totalCount); .|e8v _2J
setItems(items); !<3!ORFO
setStartIndex(startIndex); RKPX*(i~
} ka_(8
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publicList getItems(){ '.wb= C
return items; q-s(2C
} tE#;$Ss
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publicvoid setItems(List items){ KL yI*`
this.items = items; ALQ-aXJ
} zd6F}2*6
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publicint getPageSize(){ bq2f?uD-}
return pageSize; 7$*X
} aJQzM
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publicvoid setPageSize(int pageSize){ .JOZ2QWm<
this.pageSize = pageSize; ?<` ;lu/eL
} CTS1."kx1
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publicint getTotalCount(){ B!
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return totalCount; D94bq_2}
} BwkY;Ur/AL
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publicvoid setTotalCount(int totalCount){ *M)M!jTv
if(totalCount > 0){ }K5okxio
this.totalCount = totalCount; I^n DO\m <
int count = totalCount / f92z/5%V
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pageSize; ^
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if(totalCount % pageSize > 0) /J(vqYK"
count++; t#xfso`4o
indexes = newint[count]; CBv0fQtL
for(int i = 0; i < count; i++){ PXyv);#Q`
indexes = pageSize * Ze[,0Y!u&
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} i),bAU!+m
}else{ 'J$@~P
this.totalCount = 0; 9GRQ^E
} Wb>;L@jB7
} ;{aGEOP'U
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publicint[] getIndexes(){ Vm[F~2+HX
return indexes; *NG\3%}%|@
} Xo:Mar
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publicvoid setIndexes(int[] indexes){ x0b=r!Duu
this.indexes = indexes; zO---}[9a
} x5CMP%}d
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publicint getStartIndex(){ r
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{
return startIndex; "X^<g{]
} fZj,Q#}D
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publicvoid setStartIndex(int startIndex){ q-+:1E
if(totalCount <= 0) %ioVNbrR7
this.startIndex = 0; *FktI\tS
elseif(startIndex >= totalCount) j!w{
this.startIndex = indexes B;?)X&n|X
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[indexes.length - 1]; )|v y}Jf7
elseif(startIndex < 0) s[sv4hq
this.startIndex = 0; 14"57Jt8
else{ <zL_6Y2
this.startIndex = indexes 3LT~-SvL
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[startIndex / pageSize];
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} lcm3wJ'w
} pY@QR?F\
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publicint getNextIndex(){ 1f<R,>
int nextIndex = getStartIndex() + #G.eiqh$a
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pageSize; DnFzCJ
if(nextIndex >= totalCount) TIxOMY y
return getStartIndex(); bD0l^?Hu!
else rVqQo`K\
return nextIndex; *V%"q|L8
} y^,Q M[ &
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publicint getPreviousIndex(){ e`s1z|h
int previousIndex = getStartIndex() - In^mE(8YO
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pageSize; MzX&|wimb
if(previousIndex < 0) =T,Q7Dh
return0; AU3Rz&~
else [B#XA}w
return previousIndex; 9zb1t1[W
} h@Ea5x
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} \1jThJn
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抽象业务类 U8Zb&6
java代码: gns}%\,
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/** . s9E
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* Created on 2005-7-12 A{
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*/ -n&&d8G^s
package com.javaeye.common.business; < j:\;mi;
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import java.io.Serializable; eO <N/?t
import java.util.List; S(Af o`
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import org.hibernate.Criteria; qC> tni%
import org.hibernate.HibernateException; q* p
import org.hibernate.Session; `P;r[j"
import org.hibernate.criterion.DetachedCriteria; }bv+^#
import org.hibernate.criterion.Projections; PPB/-F]rr
import (s,&