Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 <"}WpT
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 YfUUbV
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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 \
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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 a!*K)x,"<
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分页支持类: Wz-7oP%;I
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java代码: 8jm\/?k|
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package com.javaeye.common.util; M`gr*p
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import java.util.List; Fc.1)yh.
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publicclass PaginationSupport { u<a =TPAU
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publicfinalstaticint PAGESIZE = 30; .qG*$W2f
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privateint pageSize = PAGESIZE; nN[gAM (
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privateList items; e+7x &-+
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privateint totalCount; X/-u$c
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privateint[] indexes = newint[0]; wC4:OJ[d
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privateint startIndex = 0; g
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public PaginationSupport(List items, int O a#m}b
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totalCount){ ? bnhx
setPageSize(PAGESIZE); 4.}J'3 .
setTotalCount(totalCount); M}*#{UV2
setItems(items); K_t!P
setStartIndex(0); U2)y fhI
} `1qM Sq
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public PaginationSupport(List items, int M~#%
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totalCount, int startIndex){ ~f:jI1(}
setPageSize(PAGESIZE); |m /XGr
setTotalCount(totalCount); ';OZP2
setItems(items); E#A}J:
setStartIndex(startIndex); #(Ah>y
}
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public PaginationSupport(List items, int 1X$hwkof
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totalCount, int pageSize, int startIndex){ "f-z3kL
setPageSize(pageSize); 2h^9lrQcQG
setTotalCount(totalCount); H&3i[D!p
setItems(items); E]26a,^L
setStartIndex(startIndex); b+qdl`Vd
} A-XWG9nL
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publicList getItems(){ X`E3lgfqT
return items; #pm0T1+jW
} FZW:dsm
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publicvoid setItems(List items){ T($6L7 j9
this.items = items; N&'05uWY}
} M,j3 z#
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publicint getPageSize(){ sHi *\
return pageSize; `OWw<6`k
} U)g27*7
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publicvoid setPageSize(int pageSize){ >!7 \Rx
this.pageSize = pageSize; JSOgq/\
} 8wQ|Ep\
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publicint getTotalCount(){ g0
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return totalCount; [#hoW"'Q9
} (@y te
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publicvoid setTotalCount(int totalCount){ {f
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if(totalCount > 0){ @p}"B9h*^
this.totalCount = totalCount; ;[>g(W+
int count = totalCount / $pOgFA1'
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pageSize; Ar:ezA
if(totalCount % pageSize > 0) |KQkmc
count++; )^'g2gVK+p
indexes = newint[count]; Z(=UZI?
for(int i = 0; i < count; i++){ t@1bu$y
indexes = pageSize * zjVQ \L
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i; !<P|:Oo*Dl
} E6FT*}Q
}else{
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this.totalCount = 0; %oY=.Ok ]
} k_}aiHdG
} Z<,$XvL
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publicint[] getIndexes(){ (T]<
return indexes; LAT%k2%Wx
}
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publicvoid setIndexes(int[] indexes){ k-uwK-B}v+
this.indexes = indexes; }&h*bim
} o :tz_5
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publicint getStartIndex(){ }#h >*+Q
return startIndex; Q5:8$
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} />,Tq!i\4}
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publicvoid setStartIndex(int startIndex){ =Hs[peO*
if(totalCount <= 0) s/"?P/R
this.startIndex = 0; X>`5YdT~+
elseif(startIndex >= totalCount) ;F:~HrxT}
this.startIndex = indexes =gjq@N]lAW
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[indexes.length - 1]; bim
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elseif(startIndex < 0) =Q!)xEK
this.startIndex = 0; h/t{=
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else{ (pFPuV
this.startIndex = indexes ."#M
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[startIndex / pageSize]; X/D^?BKC
} _FRwaFVJ3
} And|T 6u
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publicint getNextIndex(){ :{ }]$+|)\
int nextIndex = getStartIndex() + S|pMX87R
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pageSize; AUk,sCxd
if(nextIndex >= totalCount) ;GgW&*|
return getStartIndex(); =QiVcw,G#
else )t-Jc+*A>
return nextIndex; wf=
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} m<DiYxK
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publicint getPreviousIndex(){ 'K9{xI@N
int previousIndex = getStartIndex() -
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pageSize; APC,p,"
if(previousIndex < 0) BV8-\R@
return0; ?1G7=R
else LXm5f;
return previousIndex; d\R]>
} w!=Fi
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} }c"1;C&{
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抽象业务类 @vC7j>*4B
java代码: EP|OKXRltA
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/** 5yHarC
* Created on 2005-7-12 xgX"5Czvv`
*/ .5;Xd?
package com.javaeye.common.business; sL9,+
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import java.io.Serializable; i"h '^6M1
import java.util.List; ,1s,G]%M
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import org.hibernate.Criteria; 4a&*?=GG
import org.hibernate.HibernateException; TaZw_)4c
import org.hibernate.Session; bvuoo/
import org.hibernate.criterion.DetachedCriteria; @Y~R*^n"}
import org.hibernate.criterion.Projections; |9;6Cp
import ,EAf/2C
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org.springframework.orm.hibernate3.HibernateCallback; &@c?5Ie5
import vtv^l3
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org.springframework.orm.hibernate3.support.HibernateDaoS h27awO
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upport; WCg*TL}
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import com.javaeye.common.util.PaginationSupport; %|3I|'%Y
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public abstract class AbstractManager extends : *~}\M*
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HibernateDaoSupport { wClX3l>y
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privateboolean cacheQueries = false; hr+,-j
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privateString queryCacheRegion; oPX `/X#
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publicvoid setCacheQueries(boolean \uumNpB*n
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cacheQueries){ c\n&Z'vK
this.cacheQueries = cacheQueries; V>{G$(v$
} Bc/'LI.%
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publicvoid setQueryCacheRegion(String "71,vUW
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queryCacheRegion){ |r]f2Mrm
this.queryCacheRegion = D*>EWlZ
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queryCacheRegion; n9;z=
} %7X<:f|N8x
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publicvoid save(finalObject entity){ 62R94
getHibernateTemplate().save(entity); {M7`z,,[
} J H%^FF2
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publicvoid persist(finalObject entity){ -`iXAyr)m
getHibernateTemplate().save(entity); Y7vTseq
} an4^(SY
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publicvoid update(finalObject entity){ BVKr 2v
getHibernateTemplate().update(entity); pzo9?/-
} >y2;sJ4]D%
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publicvoid delete(finalObject entity){ uB(16|W>S
getHibernateTemplate().delete(entity); o)X(;o
} MWsjkI`
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publicObject load(finalClass entity, X#qmwcF
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finalSerializable id){ ECO4ut.d
return getHibernateTemplate().load F/"Q0% (m
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(entity, id); >q'xW=Y
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} 3f u*{8.XZ
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publicObject get(finalClass entity, 'f#i@$|]
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finalSerializable id){ z/JoUje
return getHibernateTemplate().get ArFsr
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(entity, id); m3apeIEi[
} V~Zi #o
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publicList findAll(finalClass entity){ 0!D,74r
return getHibernateTemplate().find("from L[]*vj
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" + entity.getName()); u|!On
} ;XJK*QDN
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publicList findByNamedQuery(finalString 5E~?hWAv
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namedQuery){ sr0.4VU1
return getHibernateTemplate oD$8(
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().findByNamedQuery(namedQuery); |ZEZ@y^
} S$CO T)7
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publicList findByNamedQuery(finalString query, K[wOK
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finalObject parameter){ y_^w|
return getHibernateTemplate _RLx;Tn)L
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().findByNamedQuery(query, parameter); U
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} yIab3/#`
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publicList findByNamedQuery(finalString query, IETdL{`~
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finalObject[] parameters){ \2?p
return getHibernateTemplate 6^W6As0
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().findByNamedQuery(query, parameters); +Zaew679
} ~R;9a"nr
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publicList find(finalString query){ 16iymiLz&
return getHibernateTemplate().find !Gv*iWg
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(query); /jR]sC)xs
} xwjim7#_:
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publicList find(finalString query, finalObject N30w^W&
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parameter){ 45Z"U<I,9
return getHibernateTemplate().find }E01B_T9z
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(query, parameter); U=?hT&w\S
} UbBo#(TZ)
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public PaginationSupport findPageByCriteria
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(final DetachedCriteria detachedCriteria){ :<-,[(@bR
return findPageByCriteria CYr2~0<g
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); DzZ)aE
} z3l=aAw8
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public PaginationSupport findPageByCriteria -IBf;"8f
aR }|^ex
(final DetachedCriteria detachedCriteria, finalint *wNX<R.
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startIndex){ ^*;{Uj+O~Y
return findPageByCriteria G;:D6\
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(detachedCriteria, PaginationSupport.PAGESIZE, \z}/=Qgc
]!>ThBMa
startIndex); Yp8~wdm
} /h4 ::,
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public PaginationSupport findPageByCriteria KFCL|9P
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(final DetachedCriteria detachedCriteria, finalint yOn +Y
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pageSize, T [w]w
finalint startIndex){ }$K2h*
return(PaginationSupport) 3Lxk7D>0c
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getHibernateTemplate().execute(new HibernateCallback(){ uV]4C^k;`[
publicObject doInHibernate ap;tggi(H
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(Session session)throws HibernateException { '4PAH2&n
Criteria criteria = ,&S^R yc
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detachedCriteria.getExecutableCriteria(session); [OI&_WIw
int totalCount = 7wt2|$Qz
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((Integer) criteria.setProjection(Projections.rowCount ,2F4S5F~rC
8^fkY'x
()).uniqueResult()).intValue(); JPS7L} Kv
criteria.setProjection M Cam c
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(null); #;bpxz1lR9
List items = v1hrRf2<
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criteria.setFirstResult(startIndex).setMaxResults q&IO9/[dk
LEM{$Fxo&
(pageSize).list(); sSLs%)e|:
PaginationSupport ps = c5uT'P"
{}?;|&_
new PaginationSupport(items, totalCount, pageSize, a8T<f/qW k
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startIndex); O_*(:Z
return ps; )z0qKb\
} Rn O%8Hk
}, true); !XjvvX"j
} "ei*iUBN:
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public List findAllByCriteria(final !GkwbHr+p
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DetachedCriteria detachedCriteria){ S~1>q+<Q
return(List) getHibernateTemplate k^q}F%UV
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().execute(new HibernateCallback(){ cH>rS\|Y
publicObject doInHibernate :uZfdu
; 6Wlu3I
(Session session)throws HibernateException { _m!TUT8o
Criteria criteria = |irqv< r
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detachedCriteria.getExecutableCriteria(session); TlExw0i!
return criteria.list(); ^'S0A=1
} qC9$xIWq
}, true); ^/K\a
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} j(|G) F
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public int getCountByCriteria(final DPvM|n`TW
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DetachedCriteria detachedCriteria){ !UE'
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Integer count = (Integer) D_GIj$%N[
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getHibernateTemplate().execute(new HibernateCallback(){ hWK}] gF
publicObject doInHibernate cq'opjLf 5
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(Session session)throws HibernateException { vjG:
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Criteria criteria = Sf>R7.lpP
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detachedCriteria.getExecutableCriteria(session); !Gu,X'#Ab
return DSY:aD!
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criteria.setProjection(Projections.rowCount @R=gJ:&a
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()).uniqueResult(); v\*43RL
} jsSxjf;O
}, true); qr%9Sdvx
return count.intValue(); )rv5QH`i
} 7<[p1C*B
} o+W5xHe^1
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用户在web层构造查询条件detachedCriteria,和可选的 Evkb`dU3n
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 *>!O2c
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PaginationSupport的实例ps。 d%?+q0j
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ps.getItems()得到已分页好的结果集 g(t"+
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ps.getIndexes()得到分页索引的数组 &| %<=\
ps.getTotalCount()得到总结果数 .lfKS!m2
ps.getStartIndex()当前分页索引 ud K)F$7
ps.getNextIndex()下一页索引 IM&2SSmYNH
ps.getPreviousIndex()上一页索引 3vPb}
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 mxtLcG4G
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,尤其是上面的示例代码,让我着实觉得该对我原来的分页查询做 V6"<lK8"
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一下代码重构了。 vCT5do"C&
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我把原本我的做法也提供出来供大家讨论吧: ?Y2ZqI
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首先,为了实现分页查询,我封装了一个Page类: e2Sm.H '
java代码: LtKiJ.j?A
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/*Created on 2005-4-14*/ 0Vv6B2<
package org.flyware.util.page; trmCIk&Fkj
lk{
/** 2?ac\c6"
* @author Joa ]Mi
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* ?P[uf
*/ Z^,C><Yt
publicclass Page { 9ctvy?53H
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/** imply if the page has previous page */ IbC(/i#%`
privateboolean hasPrePage; Y3r m')c
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/** imply if the page has next page */ O{a<f7 W
privateboolean hasNextPage; pfgFHNH:
n'=-bj`
/** the number of every page */ (&0%![j&
privateint everyPage; A_1cM#4
d_=@1JM>
/** the total page number */ 8R Wfv}:X
privateint totalPage; GwxxW
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/** the number of current page */ #}L75
privateint currentPage; 6 ]W!>jDc
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/** the begin index of the records by the current C4],7"Sw
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query */ t9SzZ2E
privateint beginIndex; C{!L +]/
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/** The default constructor */ aYr?J
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public Page(){
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} "Wr5:T-;
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/** construct the page by everyPage q}>1Rr|U`
* @param everyPage ?D-1xnxep
* */ duB{1
public Page(int everyPage){ BJ!b LQ
this.everyPage = everyPage; ?|'+5$
} GVk&n"9kp
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/** The whole constructor */ SA&0f&07i
public Page(boolean hasPrePage, boolean hasNextPage, F>Rz}-Fy
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int everyPage, int totalPage, [2#5;')
int currentPage, int beginIndex){ D-e0q)RSU
this.hasPrePage = hasPrePage; QQUeY2}
this.hasNextPage = hasNextPage; \O5`R-
this.everyPage = everyPage; |m7U^
this.totalPage = totalPage; ,/AwR?m
this.currentPage = currentPage; gRv5l3k
this.beginIndex = beginIndex; #j
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} sS;6QkI"y
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/** z+I'N4*^
* @return G 'IqAKJ
* Returns the beginIndex. [G2@[CtY1
*/ rF:C({y
publicint getBeginIndex(){ z(2pl}
return beginIndex; <+ UEM~)
} 4Gs#_|!
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/** .gTla
* @param beginIndex Hs/
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* The beginIndex to set. lo*OmAF
*/ \7PPFKS
publicvoid setBeginIndex(int beginIndex){ Q\Dx/?g!vx
this.beginIndex = beginIndex; '?dO[iQ$:
} D+ mZ7&L
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/** RUqN,C,m5I
* @return aTS\NpK&
* Returns the currentPage. XWN
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*/ <WFA3
publicint getCurrentPage(){ G n"]<8yl~
return currentPage; |N_tVE
} m3W:\LTTp
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/** )3# gpM
* @param currentPage Fw5|_@&k
* The currentPage to set. C(zgBk
*/ |f), dC
publicvoid setCurrentPage(int currentPage){ 't:$Lx
this.currentPage = currentPage; K
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} 2Ya)I k{
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/** [8|Y2Z\N
* @return ~!UC:&UKo
* Returns the everyPage. Ie{98
*/ hhd%j6
publicint getEveryPage(){ P^V,"B8t
return everyPage; ;6S,|rC]
} XN9s!5A<L)
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/** :T^!<W4
* @param everyPage wK OljE6d
* The everyPage to set. _:@~bHd
*/ yUV0{A-q{0
publicvoid setEveryPage(int everyPage){ F5UvD[i
this.everyPage = everyPage; 0VsQ$4'V^
} ?>c*[>LpZ
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/** ]<b$k
* @return Uytq,3Gj6
* Returns the hasNextPage. sd4eJ
*/ fkf69,+"]
publicboolean getHasNextPage(){ V]I@&*O~r
return hasNextPage; Gl8D
GELl;
} nOq?Q
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/** 8B#;ffkmN
* @param hasNextPage tLCu7%P>
* The hasNextPage to set. O~
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*/ j>jZg<}J
publicvoid setHasNextPage(boolean hasNextPage){ J{>9ctN
this.hasNextPage = hasNextPage; )9/.K'o,dy
} A!EmJ
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/** 9R_2>BDn
* @return 9/A$3#wF
* Returns the hasPrePage. 5=/&[=
*/ /`(Kbwh
publicboolean getHasPrePage(){ 0XouHU
return hasPrePage; _vOV(#q2a
} ,n\"zYf]^
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/** =KQQS6
* @param hasPrePage &Tz@lvOv%
* The hasPrePage to set. O-m=<Fk>
D
*/ 8A q [@i
publicvoid setHasPrePage(boolean hasPrePage){ &L7u//
this.hasPrePage = hasPrePage; k3[rO}>s
} 6oTWW@
*R9s0;&:
/** G!]%xFwYa
* @return Returns the totalPage. ,RmXZnWY
* 6Gt~tlt:L
*/ 9%fd\o@X
publicint getTotalPage(){ oCtg{*vp
return totalPage; $cl[Qcw
} 5mzOr4*0
&UzeNL"]
/** :`u?pc27Sm
* @param totalPage WFWQ;U{|
* The totalPage to set. ^gw htnI
*/ Y~I$goT
publicvoid setTotalPage(int totalPage){ GMk\
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this.totalPage = totalPage; k^<s|8Y
} TUE*mDRmP
}f
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} LDg"s0n#
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上面的这个Page类对象只是一个完整的Page描述,接下来我写了一 mL5 Nu+#
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个PageUtil,负责对Page对象进行构造: \9;SOA v
java代码: vjo@aY.x
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/*Created on 2005-4-14*/ RYhaQ&1i
package org.flyware.util.page; )"( ojh
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import org.apache.commons.logging.Log; hz:^3F`>/&
import org.apache.commons.logging.LogFactory; $'Pn(eZHGv
q%H`/~AYM
/** G.j R
* @author Joa S8=Am7D]1
* $ghAC
*/ V[9#+l~#
publicclass PageUtil { 6d4e~F
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privatestaticfinal Log logger = LogFactory.getLog 9NUft8QB
\R"} =7
(PageUtil.class); 'K|Jg.2
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/** 4)]w"z0Pc
* Use the origin page to create a new page mT]+wi&
* @param page 8]SJ=c"}Xf
* @param totalRecords $? 'JePC
* @return '*4>&V.yX
*/ *[
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publicstatic Page createPage(Page page, int i4sd29v
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totalRecords){ @.rVg XE=!
return createPage(page.getEveryPage(), ^oZz,q
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page.getCurrentPage(), totalRecords); s,5SWdb\v
} (~59}lu~
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/** ioIOyj
* the basic page utils not including exception Drn{ucIs
7!-3jU@m
handler kzky{0yKk=
* @param everyPage Fe: M'.
* @param currentPage Cx
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* @param totalRecords 2/*F}w/
* @return page #9R[%R7Nz
*/ !@6P>HzY$
publicstatic Page createPage(int everyPage, int XsH(8-n0
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currentPage, int totalRecords){ `zRE $O
everyPage = getEveryPage(everyPage); *.'9 eC0s
currentPage = getCurrentPage(currentPage); F'v3caE
int beginIndex = getBeginIndex(everyPage, 3Jt7IM!9[
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currentPage); O?p8Gjf
int totalPage = getTotalPage(everyPage, [H~Yg2O
gKp5*
totalRecords); S%NS7$`a
boolean hasNextPage = hasNextPage(currentPage, M-#OPj*
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totalPage); ,^Cl?\9"
boolean hasPrePage = hasPrePage(currentPage); +2DzX/3
^Vbx9UN/
returnnew Page(hasPrePage, hasNextPage, !b !C+ \v
everyPage, totalPage, qcNu9Ih
currentPage, 1q?b?.
L9lN AiOH
beginIndex); 7@[HRr
} fX:)mLnO/
mYU7b8x_
privatestaticint getEveryPage(int everyPage){ v?BVUH>#9
return everyPage == 0 ? 10 : everyPage; J
8!D."'Q0
} zRO-oOJ
A-=B#U F
privatestaticint getCurrentPage(int currentPage){ Dw%V.J/&o
return currentPage == 0 ? 1 : currentPage; 2
}9of[
} (31ia"i%
c
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privatestaticint getBeginIndex(int everyPage, int V6c>1nZ
a{4Wg:
currentPage){ 1v<,nABuJ6
return(currentPage - 1) * everyPage; @yGK$<R
} AZj`o
d9j+==S
<
privatestaticint getTotalPage(int everyPage, int J|O=w(
-\6";_Y
totalRecords){ |UudP?E
int totalPage = 0; O#}d!}SIp
[N35.O6P6u
if(totalRecords % everyPage == 0) 5s5GBJ?
totalPage = totalRecords / everyPage; 5l(8{,NDt
else X0QY:?
totalPage = totalRecords / everyPage + 1 ; !!{!T;)l
f1Z
return totalPage; /~8<;N>,+
} %^`b)
^~p^N <
privatestaticboolean hasPrePage(int currentPage){ {6y@;Fd
return currentPage == 1 ? false : true; wqB 5KxO
} 3Y;<Q>roT
9_$i.@L1
privatestaticboolean hasNextPage(int currentPage, T%[&[8{8
yLC5S3^1\"
int totalPage){ &J]|pf3m
return currentPage == totalPage || totalPage == 1WTDF
eX{:&Do
0 ? false : true; 0h3-;%
} |9fvj6?Y
?(t{VdZSzQ
_mEW]9Sp
} he
vM'"|4
z1K}] z%
a>05Yxw
=6sA49~M
+i\ +bR
上面的这两个对象与具体的业务逻辑无关,可以独立和抽象。 q7z;b A
.wdWs tQ
面对一个具体的业务逻辑:分页查询出User,每页10个结果。具体 !nm[ZrSP
5W Z9z-6
做法如下: nDFF,ge;a#
1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 Q;V*M
EgYM][:UU
的信息,和一个结果集List: (Yv )%2
java代码: "X[sW%# F
/Ezx'h3Q
2\b 2W_
/*Created on 2005-6-13*/ x;F^7c1
package com.adt.bo; B#A
.-nb
]* #k|>Fl
import java.util.List; Np.]
W(
@5[9iY
import org.flyware.util.page.Page; Tc3~~ X
nEG+TRZ)\
/** 0\y{/P?I$
* @author Joa fQ[&
^S$
*/ [|vE*&:uO
publicclass Result { y^ij u(
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private Page page; (
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'XbrO|%
private List content; >u-6,[(5X*
K> rZJ[a
/** P3W<a4 ==
* The default constructor ^zfO=XN
*/ l%f&vOcd
public Result(){ ].!^BYNht
super(); eZck$]P(6H
} +A!E 6+'
c; MF
/** pA%Sybw+
* The constructor using fields +Cf
* lMQ_S"
* @param page <*Ex6/j
* @param content |e%o
*/ l>kREfHq!{
public Result(Page page, List content){ hoDE*>i
this.page = page; 6-+q3#e
this.content = content; YVcO+~my
} 0DZ}8"2
)' hOW*v
/** Q4[^JQsR2
* @return Returns the content. Y30T>5
*/ #+Pk_?
publicList getContent(){ O} &%R:
return content; k^%Kw(/
} 'G#T 6B!
FG6bKvEQm^
/** nYvx[
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* @return Returns the page. 8M~^/Zc
*/ }~akVh`3
public Page getPage(){ -".q=$f
return page; Vzmw%f)_+
}
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/**
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* @param content z2
m(<zb
* The content to set. 6F)^8s02h
*/ $GI
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public void setContent(List content){ Pw:{
this.content = content; g,YJh(|#{
} h,palP6^
O,c}T7A'?w
/** ;Pd nE~
* @param page &hSABtr}
* The page to set. )*CDufRFz
*/ [dXpz^Co
publicvoid setPage(Page page){ ^tr?y??k
this.page = page; Osk'zFiL<
} kLfk2A;' i
} Y+kfMA v
m) -DrbE
JHvawFBN<u
A#@9|3
!,0%ZG}]7
2. 编写业务逻辑接口,并实现它(UserManager, |GLh|hr
uexm|5|
UserManagerImpl) ALO0yc
java代码: })#SjFq<V
iL6Yk @
,P.yl~'Al
/*Created on 2005-7-15*/ $-Yq?:
package com.adt.service; q-lejVS(g
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import net.sf.hibernate.HibernateException; YR? ujN
V:Lq>rs#
import org.flyware.util.page.Page; 8=T[Y`;x
#sRkKl|
import com.adt.bo.Result; |RS(QU<QE
\Aa{]t
/** OBm#E}
* @author Joa 1OOMqFn} L
*/ er44s^$
publicinterface UserManager { cOz/zD
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public Result listUser(Page page)throws g)M"Cx.
hUo}n>Aa
HibernateException; >69- [#P!
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} mV'XH
q[
-YXO
Jjr&+Q^3Tu
v*[oe
-KA Y
java代码: "pa2,-&
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oWP3Y.
/*Created on 2005-7-15*/ ~B704i
package com.adt.service.impl; <{Pr(U*7}
7J6D wh{
import java.util.List; m(0c|-
+~{Honj[
import net.sf.hibernate.HibernateException; vWh]1G#'p[
&&s3>D^Ta
import org.flyware.util.page.Page; f$|AU-|<
import org.flyware.util.page.PageUtil; Ix59(g
tSf$`4
import com.adt.bo.Result; :g~X"C1s
import com.adt.dao.UserDAO;
PZ[hH(EX
import com.adt.exception.ObjectNotFoundException; '&+5L.
import com.adt.service.UserManager; "WfVZBWG$
5%#V>|@e#
/** nPRv.h
* @author Joa xJ(}?0h-X
*/ 62D UF
publicclass UserManagerImpl implements UserManager { q,%lG$0v
g-8D1.U
private UserDAO userDAO; $uj3W<iw3E
>&Ios<67g
/** OC5\3H
* @param userDAO The userDAO to set. nb|KIW
*/ M8y:FDX
publicvoid setUserDAO(UserDAO userDAO){ 7ZR0cJw;
this.userDAO = userDAO; P~^VLnw
} Iss)7I
ON-zhT?v
/* (non-Javadoc) 0vjlSHS;`.
* @see com.adt.service.UserManager#listUser .kf FaK
~C31=\$
(org.flyware.util.page.Page) |1/UC"f
*/ 5oTj^W8M(
public Result listUser(Page page)throws ;_dOYG1
TO5#iiM)
HibernateException, ObjectNotFoundException { (`cXS5R
int totalRecords = userDAO.getUserCount(); PO@b9O
if(totalRecords == 0) J`d_=C?J
throw new ObjectNotFoundException *I<L1g%9d
BTAt9Z8qK
("userNotExist"); 3vC"Q!J&
page = PageUtil.createPage(page, totalRecords); 4 >`2vb
List users = userDAO.getUserByPage(page); /73ANQ"
returnnew Result(page, users); {4^NZTjd@
} , #nYH D
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} m3']/}xHO
EpUBO}q]
$)v`roDD.
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y3Qb2l
其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 ggL^*MV
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询,接下来编写UserDAO的代码: 4m"6$
3. UserDAO 和 UserDAOImpl: 'wT !X[jF
java代码: EFdo-.Ax
(`)ZR%i
S-2@:E
/*Created on 2005-7-15*/ vhE^jS<Tg
package com.adt.dao; M$$Lsb [
Usl963A#'F
import java.util.List; CwdeW.A"j
h#~\-j9>
import org.flyware.util.page.Page; Qk[YF
0@LC8Bz+'
import net.sf.hibernate.HibernateException; U.A:'9K,
d9Uv/VGp
/** N_liKhq
* @author Joa ~m6b6Aj@6
*/ ttd
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publicinterface UserDAO extends BaseDAO { aESlbH
\u$[ $R5
publicList getUserByName(String name)throws FnWN]9
M;j)F
HibernateException; ]rS:#LK
uFYcVvbT@
publicint getUserCount()throws HibernateException; i1JVvNMQ,
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zfb
publicList getUserByPage(Page page)throws >)*0lfxTZ
]WvV*FL9D3
HibernateException; M"s+k
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} BIY"{"hJ
H~<w*[uT
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4'#?"I
java代码: ! z6T_;s
9$s~ `z)
4o3TW#
/*Created on 2005-7-15*/ 77H"=
package com.adt.dao.impl; :um]a70
.X\9vVJ
import java.util.List; 7fXta|eP0
1{-yF :A
import org.flyware.util.page.Page; bR'UhPs-8;
3XSfXS{lwP
import net.sf.hibernate.HibernateException; Y|nC_7&Bv
import net.sf.hibernate.Query; r?2J
`
#; "
import com.adt.dao.UserDAO; 3,^.
ngOGo =
/** l}_6_g>6
* @author Joa -LU%z'
*/ bc]SY =
public class UserDAOImpl extends BaseDAOHibernateImpl Ny5$IIFe
Y6RbRcJw
implements UserDAO { 0q o]nw
1!W'0LPM
/* (non-Javadoc) /N7.|XI.
* @see com.adt.dao.UserDAO#getUserByName :YCB23368"
UW'@3#<?
(java.lang.String)
%\] x}IC
*/ trz&]v=:
publicList getUserByName(String name)throws p8(Z{TSv
`5
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HibernateException { #pnB+h&tE
String querySentence = "FROM user in class KD`*[.tT
R q`j|tY
com.adt.po.User WHERE user.name=:name"; G]zyx"0Sqb
Query query = getSession().createQuery &P&VJLA