Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 N{~YJ$!8
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 HOh!Xcu
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据这一功能,我设计了通用的抽象Bean基类和分页类支持,代码来 I15{)o(8$
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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 t@Nyr&|D
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分页支持类: 8Dm%@*B^b
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java代码: BFJnV.0M!
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package com.javaeye.common.util; ?8Cq{
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import java.util.List; V}NbuvDB@
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publicclass PaginationSupport { nL.<[]r
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publicfinalstaticint PAGESIZE = 30; Oh\<VvZuN
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privateint pageSize = PAGESIZE; {3{"8-18
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privateList items; klR|6u]%
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privateint totalCount; 7;(UF=4
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privateint[] indexes = newint[0]; JO"<{ngsQ
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privateint startIndex = 0; JOim3(5?s
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public PaginationSupport(List items, int fn6J*[`
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totalCount){ 84 pFc;<
setPageSize(PAGESIZE); =+MPFhvg!
setTotalCount(totalCount); .JiziFJ@mj
setItems(items); M6-&R=78K
setStartIndex(0); x`IEU*z#
} ([LSsZ]sj
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public PaginationSupport(List items, int @Sbe^x
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totalCount, int startIndex){ @)&=%
setPageSize(PAGESIZE); l9u!aD
setTotalCount(totalCount); r7,t";?>
setItems(items); =j*$
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setStartIndex(startIndex);
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} QM#4uI55B
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public PaginationSupport(List items, int V0XvJ
6}Y#= }
totalCount, int pageSize, int startIndex){ O,h ;hQZ
setPageSize(pageSize); ?+a,m# Yx
setTotalCount(totalCount); W=qVc
setItems(items); j578)!aJ
setStartIndex(startIndex); {_Rr 6
} s^uS1
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publicList getItems(){ [ )dXI IM
return items; j*jo@N|
} }\:NuTf
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publicvoid setItems(List items){ zZ323pq
this.items = items; YCM]VDx4u1
} #c?j\Y9nz
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publicint getPageSize(){ *8_wYYH
return pageSize; bNNr]h8y-
} fs%.}^kn
os={PQRD
publicvoid setPageSize(int pageSize){ g($DdKc|g
this.pageSize = pageSize; }$Tl ?BRpU
} |NC*7/}
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publicint getTotalCount(){ 'd$P`Vw:
return totalCount; |pp*|v1t
} sCk?
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publicvoid setTotalCount(int totalCount){ c+$*$|t=v`
if(totalCount > 0){ b8SHg^}
this.totalCount = totalCount; AKyUfAj3
int count = totalCount / a (b#
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pageSize; #[~pD:qqM
if(totalCount % pageSize > 0) Zk"eA'"\
count++; [^e%@TV>d
indexes = newint[count]; ft KTnK.
for(int i = 0; i < count; i++){ sN2p76KN
indexes = pageSize * &NK,VB;
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i; d0Qd$ .%A
} W=vP]x
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}else{ IrhA+)pdse
this.totalCount = 0; hB>oJC
} iQ
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} C3],n
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publicint[] getIndexes(){ Tewb?:
return indexes; @jSYB+D
} sVv xHkt@
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publicvoid setIndexes(int[] indexes){ |>27B
this.indexes = indexes; Z}l3l`h!
} ~r`9+b[9{
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publicint getStartIndex(){ SB|Qa}62
return startIndex; '~&X wZ&
} D
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publicvoid setStartIndex(int startIndex){ (Dl$k Gn
if(totalCount <= 0) W$OG(m!W>
this.startIndex = 0; s<_)$}
elseif(startIndex >= totalCount) >eB\(EP
this.startIndex = indexes \$\ENQ;Nk
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[indexes.length - 1]; RBm ;e0
elseif(startIndex < 0) vUU9$x
this.startIndex = 0; o.G!7
else{ <|+Ex
this.startIndex = indexes $yYO_ZBiy
db6b-Y{
[startIndex / pageSize]; lfz2~Si5A
} K4;'/cS
} I}6\Sv=
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publicint getNextIndex(){ PuT@}tw
int nextIndex = getStartIndex() +
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pageSize; GlT7b/JCG
if(nextIndex >= totalCount) TXk?#G\o
return getStartIndex(); I`LuRlw
else $!(pF
return nextIndex; Jjv=u
} M|qteo
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publicint getPreviousIndex(){ *
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int previousIndex = getStartIndex() - (?{MEwHG
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pageSize; j|%HIF25
if(previousIndex < 0) U,q\emR
return0; 7C ,UDp|
else .wu
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return previousIndex; w1#gOwA,$
} ?zVL;gVWA
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} ;)e2@'Agl
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抽象业务类 (%xwl
java代码:
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/** @reeO=
* Created on 2005-7-12 C@W"yYt
*/ ,o,I5>`
package com.javaeye.common.business; h{p=WWK
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import java.io.Serializable; aZ'Lx:)R
import java.util.List; p2udm! )J
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import org.hibernate.Criteria; pg%aI,
import org.hibernate.HibernateException; )>-ibf`#?
import org.hibernate.Session; K7Wk6Aw
import org.hibernate.criterion.DetachedCriteria; G\r?f&
import org.hibernate.criterion.Projections; H&
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import a|=x5`h04~
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org.springframework.orm.hibernate3.HibernateCallback; LLXVNO@e+
import P2'DD 3
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org.springframework.orm.hibernate3.support.HibernateDaoS e0@Y#7N62
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upport; x,S
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import com.javaeye.common.util.PaginationSupport; g[7#w,o
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public abstract class AbstractManager extends -3lb@ 6I6
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HibernateDaoSupport { ?Ovqp-sw
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privateboolean cacheQueries = false; 5N*Ux4M
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privateString queryCacheRegion; H4!+q:<
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publicvoid setCacheQueries(boolean ^:* 1d
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cacheQueries){ *`Yv.=cd
this.cacheQueries = cacheQueries; JEgx@};O
} B7<Kc
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publicvoid setQueryCacheRegion(String -O!Zxg5x
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queryCacheRegion){
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this.queryCacheRegion = ADk8{L{UU
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queryCacheRegion; aKJQm'9Ks
} DHT&,=
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publicvoid save(finalObject entity){ BQ2wnGc
getHibernateTemplate().save(entity); BC;:
} ,b;{emX h
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publicvoid persist(finalObject entity){ PF7&p~O(Z
getHibernateTemplate().save(entity); JA_BKA
} 4bJZmUb
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publicvoid update(finalObject entity){ xOHgp=#D
getHibernateTemplate().update(entity); [mr9(m[F
} m7GR[MR
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publicvoid delete(finalObject entity){ 3y~r72J
getHibernateTemplate().delete(entity); t
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} [j:[
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publicObject load(finalClass entity, I1>N4R-j
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finalSerializable id){ d@G}~&.|
return getHibernateTemplate().load rf%7b8[v
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(entity, id); W|,V50K
} LW:LFzp
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publicObject get(finalClass entity, .*JA!B
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finalSerializable id){ 'vaLUy9]
return getHibernateTemplate().get Wt9Q;hK
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(entity, id); H7kPM[
} A?T<",bO
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publicList findAll(finalClass entity){ 79yd&5#e?
return getHibernateTemplate().find("from y{a$y}7#X
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" + entity.getName()); 3TZ*RPmFRm
} kY&h~Q
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publicList findByNamedQuery(finalString Iu35#j
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namedQuery){ )CS.F=
return getHibernateTemplate `K
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().findByNamedQuery(namedQuery); o(Cey7
} 02k4N%
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publicList findByNamedQuery(finalString query, 35x 0T/8
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finalObject parameter){ X5*C+ I=2
return getHibernateTemplate ow' lRHZ
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().findByNamedQuery(query, parameter); rqlc2m,<-p
} `j9$T:`
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publicList findByNamedQuery(finalString query, 2w$twW-
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finalObject[] parameters){ HOp-P8z
return getHibernateTemplate *X38{rj
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().findByNamedQuery(query, parameters); =4 X]gW
} ^R$'eG 4L?
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publicList find(finalString query){ ;*[9Q'lI*
return getHibernateTemplate().find 1SV^ ){5I
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(query); Z2bcCIq4
} i$KpDXP\
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publicList find(finalString query, finalObject S|GWcSg
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parameter){ Ab1/.~^
return getHibernateTemplate().find FCc=e{
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(query, parameter); B )JM%r
} O;]?gj 1@
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public PaginationSupport findPageByCriteria I6LD)?
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(final DetachedCriteria detachedCriteria){ BXUF^Hj%
return findPageByCriteria mEuHl>
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); yO>V/5`
} WnAd5#G
7e&\{*
public PaginationSupport findPageByCriteria m$$?icA
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(final DetachedCriteria detachedCriteria, finalint *xM/;)
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startIndex){ ?&l)W~S
return findPageByCriteria 7nHTlI1b
g9my=gY
(detachedCriteria, PaginationSupport.PAGESIZE, 4rU!4l
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startIndex); cUDg M
} !@
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public PaginationSupport findPageByCriteria ;</Twm;:
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(final DetachedCriteria detachedCriteria, finalint '?Iif#Z1
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pageSize, :a<hQ|p
finalint startIndex){ hGP1(pH.
return(PaginationSupport) ev>oC~>s
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getHibernateTemplate().execute(new HibernateCallback(){ fV ZW[9[
publicObject doInHibernate |Zq\GA
xNN@ 1P[*
(Session session)throws HibernateException { hWcTI{v
Criteria criteria = i.rU&yT%
z4}
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detachedCriteria.getExecutableCriteria(session); hPufzhT
int totalCount = D(r:}pyU
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((Integer) criteria.setProjection(Projections.rowCount Kv+Bfh
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()).uniqueResult()).intValue(); ibF#$&!
criteria.setProjection En9R>A;`
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(null); (clU$m+oXX
List items = Ls:=A6AGM
->yeJTsE9
criteria.setFirstResult(startIndex).setMaxResults Uk-HP\C"7
BGjb`U#%3
(pageSize).list(); ZxS&4>.
PaginationSupport ps = 3DoRE2}
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new PaginationSupport(items, totalCount, pageSize, ?B4#f!X
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startIndex); =2oUZjA
return ps; D&[Z;,CHMA
} [{PqV):p
}, true); E5B8 Z?$a
} H(\V+@~>AD
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public List findAllByCriteria(final *e<_; Kr?
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DetachedCriteria detachedCriteria){ LC'2q*:'
return(List) getHibernateTemplate ( D}"&2
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().execute(new HibernateCallback(){ *:arva5
publicObject doInHibernate Sa}D.SBg
bc}dYK3$q
(Session session)throws HibernateException { @
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Criteria criteria = J#7(]!;F
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detachedCriteria.getExecutableCriteria(session); dokuyiN\
return criteria.list(); )bYez
} H%Y%fQ~^
}, true); dB`b9)Tk0z
} YMAQ+A!
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public int getCountByCriteria(final I>((o`
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DetachedCriteria detachedCriteria){
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Integer count = (Integer) #K`B<2+T
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getHibernateTemplate().execute(new HibernateCallback(){ $GF&x>]]
publicObject doInHibernate HIPL!ss]
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(Session session)throws HibernateException { mG}k 3e-
Criteria criteria = /;+,mp4
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detachedCriteria.getExecutableCriteria(session); *tAqt2{48
return =8S}Iat
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criteria.setProjection(Projections.rowCount &PWf:y{R`
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()).uniqueResult(); X RRJ)}P
} aL$j/SC
}, true); B*Cb6'Q
return count.intValue(); '
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} Y~GUR&ww0n
} w)<4>(D
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用户在web层构造查询条件detachedCriteria,和可选的 vz,LF=s2
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 /'NUZ9
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PaginationSupport的实例ps。 Wy,"cT
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ps.getItems()得到已分页好的结果集 mdt
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ps.getIndexes()得到分页索引的数组 2?H@$-x>
ps.getTotalCount()得到总结果数 [EOMCH2Ki
ps.getStartIndex()当前分页索引 w}b<D#0XC
ps.getNextIndex()下一页索引 GFY-IC+fc
ps.getPreviousIndex()上一页索引 'Ix5,^M}B
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 @d
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,尤其是上面的示例代码,让我着实觉得该对我原来的分页查询做 1YFAr}M
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一下代码重构了。 K5+!(5V~
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我把原本我的做法也提供出来供大家讨论吧: :3 PG f
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首先,为了实现分页查询,我封装了一个Page类: TwwIt5_fN
java代码: _jk|}IB;X
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/*Created on 2005-4-14*/ U!_sh<
package org.flyware.util.page; 7~lB}$L
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/** `lvh\[3^
* @author Joa sV&`0N
* &8juS,b
*/ uq]iMz>
publicclass Page { 4=UI3 2v3
w8U2y/:>
/** imply if the page has previous page */ <xC:Ant
privateboolean hasPrePage; Fv;u1Atiw
vFR
1UPF
/** imply if the page has next page */ #[C<
J#;
privateboolean hasNextPage; =sL(^UISl
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/** the number of every page */ cy9N:MR(c
privateint everyPage; cyDiA(ot&
s"#CkG
/** the total page number */ M$gvq:}kt
privateint totalPage; # e$\~c Pd
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/** the number of current page */ ]C+eJ0"A
privateint currentPage; [3GKPX:OA/
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/** the begin index of the records by the current iczs8gj*
z{@=_5;
query */ A"`L~|&
privateint beginIndex; M3)v-"
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/** The default constructor */ KhLg*EL
public Page(){ fdg[{T4:
XlE$.
} osI- o~#>
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/** construct the page by everyPage aYqqq|
* @param everyPage 9 Zs#Ky/
* */ (di)`D5Q
public Page(int everyPage){ 32TP Mk
this.everyPage = everyPage; zkuv\kY/ Z
} BW+qp3 k\
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/** The whole constructor */ 9 J$Y,Z
public Page(boolean hasPrePage, boolean hasNextPage, &f$a1#O}dx
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int everyPage, int totalPage, YNuewD
int currentPage, int beginIndex){ 1VRqz5
this.hasPrePage = hasPrePage; [B.W1 GL!
this.hasNextPage = hasNextPage; \CP*i_:"
this.everyPage = everyPage; =]8f"wAh*
this.totalPage = totalPage; Xcs8zT
this.currentPage = currentPage; kO
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this.beginIndex = beginIndex; IEKMa
} hhN(;.
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/** wY."Lw> 6
* @return $IZ*|>(
* Returns the beginIndex. :YkDn~@
*/ /&y,vkZTT
publicint getBeginIndex(){ ^!zJf7(+<>
return beginIndex; >b[4
} ,C5@P+A
F#zQQ)(Pf
/** |:`?A3^m#
* @param beginIndex
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* The beginIndex to set. iPRJA{$b_
*/ Pl`Bd0
publicvoid setBeginIndex(int beginIndex){ +_vm\]4
this.beginIndex = beginIndex; /3xFd)|Ds
} Q*TQ*J7".X
#d7)$ub
/** b}"vIRz
* @return 8trm`?>
* Returns the currentPage. gwkZk-f\p
*/ _.s\qQ
publicint getCurrentPage(){ hfP(N_""S
return currentPage; 4cv|ok8P
} &**.naSo
jHUz`.8B
/** EHE6-^F
* @param currentPage AmrJ_YP/t~
* The currentPage to set. "X!_37kQ
*/ ,sy/rV
publicvoid setCurrentPage(int currentPage){ g*\v}6
h
this.currentPage = currentPage; eN7yjd'Y6
} PT=2LZ
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/** )gm \e?^
* @return ek_i{'hFd
* Returns the everyPage. d,E/9y\e
*/ kB!M[[t
publicint getEveryPage(){ aNh1e^j
return everyPage; *jqPKK/
} '! 2
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/** yp7,^l
* @param everyPage Phjf$\pt
* The everyPage to set. [eTck73
*/ kdZ-<O7@
publicvoid setEveryPage(int everyPage){ Y7IlqC`i
this.everyPage = everyPage; EJ[iOYx
} :EmMia-)J
Ky{I&}+R|
/** :O_<K&
* @return Yru1@/;
* Returns the hasNextPage. Zzzi\5&gU
*/ iJ~iJ'vf
publicboolean getHasNextPage(){ |cBF-KNZ
return hasNextPage; w{UKoU
} _{@}Fd?o
EXScqGa]
/** }j5@\c48
* @param hasNextPage I(r5\A=
* The hasNextPage to set. ~(L<uFU V
*/ Fb`7aFIf
publicvoid setHasNextPage(boolean hasNextPage){ aWi]t'_
this.hasNextPage = hasNextPage; IBsO
} 1pBsr(
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/** Q(eQZx{
* @return S7~l%G>]b
* Returns the hasPrePage. nD{;4$xP`
*/ ) a2m<"
publicboolean getHasPrePage(){ GA*Khqdid
return hasPrePage; Zm'::+tl
} wBaFC\CW
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/** g960;waz3
* @param hasPrePage ri_6wbPp
* The hasPrePage to set. `oI/;&
*/ L.~]qs|G/K
publicvoid setHasPrePage(boolean hasPrePage){ 7D1`^,?
this.hasPrePage = hasPrePage; X0J]6|du.
} TuhL:
4)S?Y"Bs
/** 2SCf]&
* @return Returns the totalPage. 2nz'/G
* Jd_1>p
*/ Gt*<?
publicint getTotalPage(){ ,'0oj$~S:
return totalPage; N`^W*>XB
} T;e (Q,!H
V$]a&wM<5
/** V?pO ~qo
* @param totalPage HK4`@jYQ
* The totalPage to set. XhkL))FcG
*/ (E]K)d
publicvoid setTotalPage(int totalPage){ IpVwn Nj!}
this.totalPage = totalPage; [A/+tv
} #1lS\!
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} 761"S@tf$}
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#]hkQo
LfSUY
KQI} 5
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 PL2Q!i`[o
OX`GN#yl
个PageUtil,负责对Page对象进行构造: @G-k]IWi
java代码: xRZT
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/*Created on 2005-4-14*/ {Q3#]Vu
package org.flyware.util.page; wAwH8x LU
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import org.apache.commons.logging.Log; ?At-
import org.apache.commons.logging.LogFactory; m<HjL
L&k$4,Z9
/** }U1{&4Ph
* @author Joa WmBnc#>gK
*
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*/ ]=$ay0HC
publicclass PageUtil { S6:gow(wU
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privatestaticfinal Log logger = LogFactory.getLog |?b"my$g$
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(PageUtil.class); U.9nHo{
~a|Q[tiV]
/** yKy)fn!
* Use the origin page to create a new page {.)~4.LhQM
* @param page T1TZ+\
* @param totalRecords .-*nD8b
* @return G#M]\)f%
*/ VL1z$<vVXt
publicstatic Page createPage(Page page, int @"5u~o')@v
^IZ0M1&W;
totalRecords){ AR2+W^aM3
return createPage(page.getEveryPage(), cLF>Jvs*J
90I3_[Ii
page.getCurrentPage(), totalRecords); yUlQPrNX
} f}uCiV!?v
<]`2H}*U'
/** c8W=Is`
* the basic page utils not including exception ;]ew>P)
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handler AV`7>@
* @param everyPage _!vbX
mb
* @param currentPage
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* @param totalRecords Za?&\
* @return page L{Zy7O]"d
*/ M:M<bz Vu
publicstatic Page createPage(int everyPage, int 0Jif.<
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currentPage, int totalRecords){ &^>r<~]
everyPage = getEveryPage(everyPage); QrA+W\=_`y
currentPage = getCurrentPage(currentPage); 5qko`r@#
int beginIndex = getBeginIndex(everyPage, 0 pz
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/!3:K<6@
currentPage); K 6Ua~N^
int totalPage = getTotalPage(everyPage, v2g+oKO]
tr+~@]I+
totalRecords); ~+ur*3X
boolean hasNextPage = hasNextPage(currentPage,
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sP8B?Tn1W
totalPage); j+_75t`AZ
boolean hasPrePage = hasPrePage(currentPage); Un+Jz
?Y
(\
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returnnew Page(hasPrePage, hasNextPage, JC3)G/m(03
everyPage, totalPage, (q7mzZY
currentPage, 9)X<}*(qo
4\RuJx
beginIndex); 'IszS!kY
} S?<Qa;
>{8H==P
privatestaticint getEveryPage(int everyPage){ 6.=b^6MV
return everyPage == 0 ? 10 : everyPage; zD|W3hL2&
} upKrr
aP gG+tu
privatestaticint getCurrentPage(int currentPage){ $Q4b~
return currentPage == 0 ? 1 : currentPage; RT9@&5>il
} ^)I:82"|?
d_hcv|%
privatestaticint getBeginIndex(int everyPage, int p^!p7B`qe.
fba3aId[
currentPage){ *4E,|IJ
return(currentPage - 1) * everyPage; vA `.8U 0S
} QkAwG[4
64@s|m*
privatestaticint getTotalPage(int everyPage, int GC2<K
ozG:f*{T
totalRecords){ eU0-_3gN_
int totalPage = 0; [5-5tipvWp
yFqC-t-i
if(totalRecords % everyPage == 0) gw^+[}U#
totalPage = totalRecords / everyPage; ~E~J*R Ze
else ^DOcw@Z6HC
totalPage = totalRecords / everyPage + 1 ; FW,D\51pTP
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return totalPage; L&%iY7sC`
} HVpaVM
6h%(0=^
privatestaticboolean hasPrePage(int currentPage){ CTYkjeej
return currentPage == 1 ? false : true; Wi<Fkzj
} NM ]/OKs'H
@ So"(^
privatestaticboolean hasNextPage(int currentPage, ~sD'pS
/jAs`"U
int totalPage){ T~Cd=s(T"
return currentPage == totalPage || totalPage == '
r/1+.
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0 ? false : true; -M}iDBJx>#
} e^QOn
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TPuzL(ws
} C'#:}]@E
QNY{pk
*k -UQLJ
&[uGfm+@
CDhk!O..
上面的这两个对象与具体的业务逻辑无关,可以独立和抽象。 5o*x?P!$
%qMk&1
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 ;Xns 9
.xx9tP}Xy
做法如下: ]Az >W*Y
1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 (0r6_8e6xv
e[n>U@
的信息,和一个结果集List: DWG}}vN:&
java代码: AF
!_!qc;
sXTO`W/
H{8\<E:V+}
/*Created on 2005-6-13*/ I5mS!m/X
package com.adt.bo; -oj@ c
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import java.util.List; ?a%
u=G
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import org.flyware.util.page.Page; _kSus
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/** e j~ /sO
* @author Joa #R$!|
*/ `Cc<K8s8
publicclass Result { VQyDd~Za
uB
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private Page page; ZyG528O22
e=U7w7(s9
private List content; Yi:+,-Fso
qXW5_iX
/** P06K0Fxf
* The default constructor yI!K
quMC
*/ fXN;N&I
public Result(){ Xs`/q}R
super(); dFlx6H+R!0
} YeQX13C"Z
&^Io\
/** t0Uax-E(
* The constructor using fields Q["}U7j
* pVr,WTr6E
* @param page fqi584
* @param content :Vg,[\I{
*/ +J2=\YO
public Result(Page page, List content){ I?=Q
*og
this.page = page; |b@-1
this.content = content; KM6r}CDHs
} "(5M }5D
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/** F
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* @return Returns the content. $ _zdjzT
*/ ppxu\a
publicList getContent(){ rei<{woX
return content; /2c?+04+
} vR -/c
Gc>\L3u
/** u+*CpKR}
* @return Returns the page. o_cj-
*/ qVf~\H@
public Page getPage(){ B!:(*lF
return page; _M?:N:e
} }Vt5].TA
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/** !!9V0[
* @param content R
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* The content to set. >o@WT kF]
*/ h'
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public void setContent(List content){ >y1/*)O9~
this.content = content; wFh{\
} RxqXGM`4
%9IM|\ulp
/** ^OUkFH;dG?
* @param page Vry#
* The page to set. `=oN &!
*/ R{.ku!w
publicvoid setPage(Page page){ r8mE
this.page = page; DY1o!thz)
} bygwoZ<E
} "UE'dWz
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WHU&9N
.; :[sv)
)%*uMuF
2. 编写业务逻辑接口,并实现它(UserManager, doG&qXw
IuPwFf)
UserManagerImpl) X/?3ifP6I
java代码: rXA7<_V g
u+hzCCwtR
7-)Y\D
/*Created on 2005-7-15*/ &D/_@\ 0
package com.adt.service; F$)Ki(mq
srUpG&Bcx
import net.sf.hibernate.HibernateException; #bnFR
U|,VH-#
import org.flyware.util.page.Page; @n<WM@|l
4rv3D@E
import com.adt.bo.Result; zc(-dMlK
qV5ME#TJ
/** V]IS(U(
* @author Joa * ,,D%L
*/ ,rQznE1e
publicinterface UserManager { 'H+pwp"M@
JrO2"S
public Result listUser(Page page)throws gg5`\}
\ B<(9
HibernateException; V"gnG](2l
2Ui)'0
} [&6l=a
QO0T<V
'H:lR1(,
<vOljo
4u A;--j
java代码: $KKrl
r'-)@|
aHS.U^2
/*Created on 2005-7-15*/ BT>8
package com.adt.service.impl; yjc:+Y{5'
PoQ@9
A
import java.util.List; B$aboL2
Qr$uFh/y
import net.sf.hibernate.HibernateException; :43K)O"
[p|-G*=00
import org.flyware.util.page.Page; buq3t+0
import org.flyware.util.page.PageUtil; L3'o2@$
Lr_+)l
import com.adt.bo.Result; @zW'!Ol
import com.adt.dao.UserDAO; d2Bn`VI
import com.adt.exception.ObjectNotFoundException; >cQ*qXI0
import com.adt.service.UserManager; qbpvTTF
O]90F
/** USfOc
* @author Joa Z'hW;^e%_z
*/ BB>3Kj:|
publicclass UserManagerImpl implements UserManager { |&o%c/
{])F%Q_#cD
private UserDAO userDAO; }r9f}yX9Q
.^fq$7Y}7
/** C
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* @param userDAO The userDAO to set.
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*/ ma?$@]`k
publicvoid setUserDAO(UserDAO userDAO){ !zVuO*+
this.userDAO = userDAO; Atzp\oO
} J#!:Z8b
P
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/* (non-Javadoc) 1.]#FJe
* @see com.adt.service.UserManager#listUser Da0E)
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(org.flyware.util.page.Page) 1BmevEa)
*/ H*?U@>UU
public Result listUser(Page page)throws y}R{A6X)
kzMCI)>"
HibernateException, ObjectNotFoundException { >t20GmmN
int totalRecords = userDAO.getUserCount(); -yy&q9
if(totalRecords == 0) g>CF|Wj
throw new ObjectNotFoundException 5rr7lwWZ
x}?y@.sn8
("userNotExist"); O&!+ni
page = PageUtil.createPage(page, totalRecords); c 5+oP j
List users = userDAO.getUserByPage(page); hbD@B.PD
returnnew Result(page, users); qH: `
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} *!ZU"q}i
\SHYwD}*Pr
} @0; 9.jml,
b'p bf
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cZuZfMDM
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其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 tx;MH5s/V
O[+S/6uy
询,接下来编写UserDAO的代码: |FHeT*"
3. UserDAO 和 UserDAOImpl: "CapP`:
java代码: I,(m\NalK
5?r#6:(yI
@Kd1|K
/*Created on 2005-7-15*/ )l[<3<@s
package com.adt.dao; e#(0af8A
bIu'^
import java.util.List; >Vy=5)/i
ZSuUmCm
import org.flyware.util.page.Page; MUh)
:DXkAb2
import net.sf.hibernate.HibernateException; +AhR7R!
]tA39JK-i
/** 1mm/Ssw:C
* @author Joa \bw71( Q
*/ PspH[db
publicinterface UserDAO extends BaseDAO { zmQ V6o=k
%<6oKE
publicList getUserByName(String name)throws IHZ WNT2
7Vr .&`l
HibernateException; G(~d1%(
j0B, \A
publicint getUserCount()throws HibernateException; yv=LT~
DmEmv/N=
publicList getUserByPage(Page page)throws &W:Wv,3
c9/w-u~j
HibernateException; tSV}BM,
7h?PVobe
} 7(rTGd0
=uQCm#
ywXerz7dUk
=unMgX]$
M7-piRnd4
java代码: wv>Pn0cO
dE!{=u(!i
B(wk $2
/*Created on 2005-7-15*/ W"? |O Q'
package com.adt.dao.impl; #Z;ziM:
A8&yB;T$y
import java.util.List; -sm{Hpf_b
$9Hod-Z1
import org.flyware.util.page.Page; .\= GfF'
/Mb?dVwA
import net.sf.hibernate.HibernateException; =B4U~|k
import net.sf.hibernate.Query; {(]B{n
s
Z(LT'}
import com.adt.dao.UserDAO; 2hdi)C,7Y
O Ul+es
/** M,"4r^%k
* @author Joa 9a 9<I
*/ LH@)((bi4v
public class UserDAOImpl extends BaseDAOHibernateImpl E#JDbV1AC
1fM=>Z
implements UserDAO { "5C)gxI^
`~vqu69MF9
/* (non-Javadoc) e;~[PYeu
* @see com.adt.dao.UserDAO#getUserByName b)J(0,9`G"
kD
dY
i7g>
(java.lang.String) 5<w"iqZ\?N
*/ uNZJNrV%
publicList getUserByName(String name)throws wvvMesX<L
}WS%nQA
HibernateException { )` -b\8uw
String querySentence = "FROM user in class ^Crl~~Gk`
,uqSq
com.adt.po.User WHERE user.name=:name"; k<wX ??'
Query query = getSession().createQuery vNlYk
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Hrq
(querySentence); $]|fjB#D
query.setParameter("name", name); !31v@v:)
return query.list(); H>AQlO+ J
} CT+pkNC
Q<B=m6~
/* (non-Javadoc) P$S>=*`n
U
* @see com.adt.dao.UserDAO#getUserCount() 6f,#O8]#5
*/ u:&gp
publicint getUserCount()throws HibernateException { Yf&x]<rkCp
int count = 0; ,+<NP}Yg#G
String querySentence = "SELECT count(*) FROM #X'!wr|-
P0uUVU=B|
user in class com.adt.po.User"; Sq8 `)$\
Query query = getSession().createQuery EzqYHY+_r
zm4Okg)w@
(querySentence); li;Np5P
count = ((Integer)query.iterate().next +RQlMAB
-1d2Qed
()).intValue(); Bi/=cI
return count; 4]0|fi3}>
} 5jD2%"YUV
9$8B)x
/* (non-Javadoc) +:pjQ1LsJ
* @see com.adt.dao.UserDAO#getUserByPage ~f0Bu:A)
5BR9f3}
(org.flyware.util.page.Page) gfG Mu0FjB
*/ )pLde_ k
publicList getUserByPage(Page page)throws Zc(uK{3W-
wG6>.`:
HibernateException { hd1(q33
String querySentence = "FROM user in class iIji[>qz
Tn,'*D@l
com.adt.po.User"; XBe!9/'k>
Query query = getSession().createQuery W}#eQ|oCV
}D/0&