Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 3`Ug]<m
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 "8.to=Lx
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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 2qA"emUM
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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 WxLmzSz{xD
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分页支持类: ak SUk)}e
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java代码: 35;UE2d)<
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package com.javaeye.common.util; p)x*uqSd
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import java.util.List; %2S+G?$M?
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publicclass PaginationSupport { nDFF,ge;a#
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publicfinalstaticint PAGESIZE = 30; |vGb,&3
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privateint pageSize = PAGESIZE; 2\b 2W_
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privateList items;
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privateint totalCount; GKk>;X-
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privateint[] indexes = newint[0]; CnXl 7"
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privateint startIndex = 0; \{GBaMwG~
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public PaginationSupport(List items, int n[E#K`gg'
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totalCount){ hx5oTJR
setPageSize(PAGESIZE); }C'H@:/
setTotalCount(totalCount); +A!E 6+'
setItems(items); z5>
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setStartIndex(0); .{=|N8*py8
} qH8d3?1XO
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public PaginationSupport(List items, int v/s6!3pnl
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totalCount, int startIndex){ 1KI,/ H"SY
setPageSize(PAGESIZE); 17..
setTotalCount(totalCount); Cj +{%^#
setItems(items); #Bih=A
#
setStartIndex(startIndex); k^%Kw(/
} zxo"
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public PaginationSupport(List items, int ULJV
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totalCount, int pageSize, int startIndex){ Vzmw%f)_+
setPageSize(pageSize); ^'Z?BK
setTotalCount(totalCount); -aV!ZODt
setItems(items); m4r!Ck|
setStartIndex(startIndex); nF)XZB0F
} Nr(t5TP^
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publicList getItems(){ Z=|NoDZ
return items; 7C::%OF~7
} [dXpz^Co
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publicvoid setItems(List items){ q; n
this.items = items; +%'!+r
l
} JHvawFBN<u
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publicint getPageSize(){ e{}oQK
return pageSize; 2K~<_.S
} )[]*Y]vSx
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publicvoid setPageSize(int pageSize){ 3%0ShMFP@
this.pageSize = pageSize; Af`qe+0E
} knS(\51A
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publicint getTotalCount(){ h't!1u
return totalCount; -V_iv/fmM
} \Aa{]t
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publicvoid setTotalCount(int totalCount){ .IkQo`_s:
if(totalCount > 0){ 7+Z%#G~T
this.totalCount = totalCount; 5X1z^(
int count = totalCount / ]aDU* tk
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pageSize; zcrM3`Zh
if(totalCount % pageSize > 0) 9()d7Y#d/`
count++; a:V2(nY
indexes = newint[count]; +k<0:Fi
for(int i = 0; i < count; i++){ IBn+42V
indexes = pageSize * G<_<j}=
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i; =uil3:,[S
} dR|*VT\
}else{ |3SM
this.totalCount = 0; QrSF1y'd
} # ^q87y
} S!@h\3d8{
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publicint[] getIndexes(){ lB<
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return indexes; [~v1
} T4fVZd)x
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publicvoid setIndexes(int[] indexes){ a@v}j&
this.indexes = indexes; u$%;03hJ
} \|f3\4;!
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publicint getStartIndex(){ 5BAGIO<w
return startIndex; M8y:FDX
} Py^fWQ5I~%
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publicvoid setStartIndex(int startIndex){ s)BB(vQ]6
if(totalCount <= 0) ygo4.
this.startIndex = 0; =&,<Co1 hF
elseif(startIndex >= totalCount) 7mBH#Q)
this.startIndex = indexes qdQQt5Y'm
|]UR&*
[indexes.length - 1]; !V O^oD7
elseif(startIndex < 0) 1{Kv
this.startIndex = 0; s.IYPH|pn
else{ d$}!x[g$Z
this.startIndex = indexes kes
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7
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[startIndex / pageSize]; F~Sw-b kSf
} \NF5)]:
} 0Bn35.K
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publicint getNextIndex(){ .EB'n{zxd
int nextIndex = getStartIndex() + uWjSqyb:
e anR$I;Yj
pageSize; s%/x3anz=
if(nextIndex >= totalCount) Gv\:Agi
return getStartIndex(); ;%a
else );!IGcgF
return nextIndex; kdW$>Jqb
} 4T??8J-J
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publicint getPreviousIndex(){ es!>u{8)
int previousIndex = getStartIndex() - k%Wj+\93f
bB+ 4
pageSize; Q`)iy/1M
if(previousIndex < 0) VXP@)\!
return0; "STd ;vR
else ,vcd>"PK
return previousIndex; ~kp,;!^vr
} 59#o+qo4
(,I9|
} X0 ^~`g
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抽象业务类 r0/aw
java代码: q(\kCUy!
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/** {v,NNKQ4x
* Created on 2005-7-12 "L&84^lmf
*/ oYAHyCkVq
package com.javaeye.common.business; 5*\]F}
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import java.io.Serializable; r) g:-[Ox9
import java.util.List; MG:eI?G/'
BF/l#)$yK
import org.hibernate.Criteria; L/xTW
import org.hibernate.HibernateException; \\P*w$c
import org.hibernate.Session; 1!W'0LPM
import org.hibernate.criterion.DetachedCriteria; o0 |T<_
import org.hibernate.criterion.Projections; 0BPUbp(
import 9?tG?b0
srK9B0I
org.springframework.orm.hibernate3.HibernateCallback; !:3X{)4
import C;I:?4
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org.springframework.orm.hibernate3.support.HibernateDaoS 8}K4M(
agd^ga3
upport; jidRh}>a=
yrG=2{I
import com.javaeye.common.util.PaginationSupport; F$@(0c
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public abstract class AbstractManager extends I~Q
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HibernateDaoSupport { nLY(%):(P
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privateboolean cacheQueries = false; Ejj+%)n.
y' RQ_Gi
privateString queryCacheRegion; vg8Yc
|#ZMZmo{
publicvoid setCacheQueries(boolean r2m&z%N&
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cacheQueries){ nL+y"O
this.cacheQueries = cacheQueries; H;MyT Vl
} ldt]=Sqy
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publicvoid setQueryCacheRegion(String Ch_eK^ g1
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queryCacheRegion){ }H:wgy`
this.queryCacheRegion = l4ru0V8s7
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queryCacheRegion; Y+{jG(rg.F
} q!{>Nlk
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publicvoid save(finalObject entity){ Ey)ey-'\
getHibernateTemplate().save(entity); Id=V\'$o
} V[0
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publicvoid persist(finalObject entity){ 06e dVIRr
getHibernateTemplate().save(entity); BS3{TGn
} W'6sY@0m
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publicvoid update(finalObject entity){ XTRF IY
getHibernateTemplate().update(entity); 9.B gsV .
} kK:U+`+
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publicvoid delete(finalObject entity){ ?JBA`,-
getHibernateTemplate().delete(entity); :LCyxLI
} g(i8HU*{q
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publicObject load(finalClass entity, T+oOlug
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finalSerializable id){ ueEf>0
return getHibernateTemplate().load _9'hmej
[5]n,toAh
(entity, id); 10xza=a
} R'8S)'l
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publicObject get(finalClass entity, [Sj"gLj
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finalSerializable id){ v3{%U1>}v
return getHibernateTemplate().get V9jxmu F,
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(entity, id); Z5
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} x~=Mn%Ew0
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publicList findAll(finalClass entity){ N6`U)=2o>h
return getHibernateTemplate().find("from =R "LB}>h}
j{D tjV8
" + entity.getName()); )+ 'r-AF*
} U8-OQ:2.
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publicList findByNamedQuery(finalString P- +]4\
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namedQuery){ T8&eaAoo
return getHibernateTemplate (UCCEQq5
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().findByNamedQuery(namedQuery); /;{L~f=et)
} OMM5ALc(F
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publicList findByNamedQuery(finalString query, ={f8s,m)P,
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finalObject parameter){ __zHe-.m
return getHibernateTemplate wS+!>Q_]w
yPY{ZADkQ
().findByNamedQuery(query, parameter); &SNH1b#>E
} z`.<dNg
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publicList findByNamedQuery(finalString query, }!?RB v'W
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finalObject[] parameters){ 9|[uie
return getHibernateTemplate \Rb:t}
QPh3(K1w^
().findByNamedQuery(query, parameters); W-gu*iZ6&
} LAY:R{vI
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publicList find(finalString query){ wOCAGEg
return getHibernateTemplate().find e /1x/v'
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(query); ||.Hv[
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} .gzfaxi
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publicList find(finalString query, finalObject !s?SI=B8
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parameter){ U]w"T{;@.)
return getHibernateTemplate().find )B)f`(SA"<
F#M(#!)Y"
(query, parameter); "^!y>]j#A
} <VQ)}HW;k
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public PaginationSupport findPageByCriteria So8
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(final DetachedCriteria detachedCriteria){ }ijQ*ECdl
return findPageByCriteria rf%VSxD9
yP>025o't
(detachedCriteria, PaginationSupport.PAGESIZE, 0); UV0[S8A
} zH6@v+gb
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public PaginationSupport findPageByCriteria ^jUw4Dj~-q
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(final DetachedCriteria detachedCriteria, finalint -`eB4j'7
Z<^!N)
startIndex){ ZTz07Jt
return findPageByCriteria J|DZi2o
*8m['$oyV
(detachedCriteria, PaginationSupport.PAGESIZE, _ZFEo< `'
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startIndex); rUmP_
} t|i<}2
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public PaginationSupport findPageByCriteria /*k_`3L
3
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(final DetachedCriteria detachedCriteria, finalint %lWOW2~R
n*A1x8tn
pageSize, )RvX}y-
finalint startIndex){ zxCx2.7
return(PaginationSupport) |*UB/8C^/!
/]5*;kO`
getHibernateTemplate().execute(new HibernateCallback(){ M}# DX=NZc
publicObject doInHibernate MuQ)F-GSUu
"t(_r@qU/
(Session session)throws HibernateException { 3Cc#{X-+
Criteria criteria = A)>#n)
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detachedCriteria.getExecutableCriteria(session); F]?] |nZZ
int totalCount = BLO ]78
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((Integer) criteria.setProjection(Projections.rowCount ;tZQ9#S
j;Z?q%M{6
()).uniqueResult()).intValue(); >20dK
criteria.setProjection 4,c6VCw3+
&k%>u[Bo
(null); H4AT>}ri
List items = -|uoxj>
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criteria.setFirstResult(startIndex).setMaxResults D\-\U
E/
79W^;\3
(pageSize).list(); aW&)3C2-x
PaginationSupport ps = &tAYF_}
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new PaginationSupport(items, totalCount, pageSize, 0O>ClE~P
m\0_1 #(
startIndex); %8tE*3iUF
return ps; M
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} *??lwvJp
}, true); A+0-pF2D
} znwKwc8,
7<]
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public List findAllByCriteria(final u6ULk<<\
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DetachedCriteria detachedCriteria){ >9dD7FH
return(List) getHibernateTemplate "
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().execute(new HibernateCallback(){ 4>>=TJ!M
publicObject doInHibernate nJ2x;';lA
lFyDH{!
(Session session)throws HibernateException { 6^[4.D
Criteria criteria = m"iA#3l*=
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detachedCriteria.getExecutableCriteria(session); "a8E0b
return criteria.list(); 5?^L))
} =\WF +r]V
}, true); 2H)4}5H
} *(F`NJ 3
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public int getCountByCriteria(final 5dj@N3ZX7;
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DetachedCriteria detachedCriteria){ 0+* NHiH
Integer count = (Integer) yijP
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getHibernateTemplate().execute(new HibernateCallback(){ Kf[d@L
publicObject doInHibernate PC#^L$cg}
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(Session session)throws HibernateException { >5t%_/yeB
Criteria criteria = k||t<&`Ze
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detachedCriteria.getExecutableCriteria(session);
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return qUkMNo3
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criteria.setProjection(Projections.rowCount N>!:bF
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()).uniqueResult(); (j&:
} N]A# ecm
}, true); R-13DVK
return count.intValue(); Xo34~V@(
} o8bd L<
} "?I#!t%'
~|V^IJZ22
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w7V\_^&Id
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用户在web层构造查询条件detachedCriteria,和可选的 -zR<m
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 c{1;x)L
z%82Vt!a5
PaginationSupport的实例ps。 =&WIa#!=
*;Jb=
ps.getItems()得到已分页好的结果集 ZSC*{dD$E
ps.getIndexes()得到分页索引的数组 1@F-t94I
ps.getTotalCount()得到总结果数 oN7SmP_
ps.getStartIndex()当前分页索引 h:
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ps.getNextIndex()下一页索引 z0[XI 7KK
ps.getPreviousIndex()上一页索引 lB,1dw2(T
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 r;#"j%z
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,尤其是上面的示例代码,让我着实觉得该对我原来的分页查询做 Kxr@!m"
Nd~B$venh
一下代码重构了。 -NBVUUAgN
tn]nl!_@
我把原本我的做法也提供出来供大家讨论吧: XB)D".\
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首先,为了实现分页查询,我封装了一个Page类: 2c `m=
java代码: 8 #_pkVQw:
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/*Created on 2005-4-14*/ ^q:-ZgM>
package org.flyware.util.page; J]F&4O
!GcBNQ1p+7
/** *_(X$qfoW
* @author Joa nBh+UT}
* Ez3fL&*
*/ I652Fcj
publicclass Page { 2|nm> 4
50,'z?-_
/** imply if the page has previous page */ n6/Ous
privateboolean hasPrePage; ;Shu
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/** imply if the page has next page */ {)[o*+9
privateboolean hasNextPage; 2~4:rEPJ:
O2w-nd74U
/** the number of every page */ M(%H
privateint everyPage; A_xC@$1e<
O0 'iq^g
/** the total page number */ Jj4HJ9
privateint totalPage; |xO*!NR
c+Q'4E0|
/** the number of current page */ &> sbsx\y
privateint currentPage; d$t"Vp
UP~28%>X
/** the begin index of the records by the current LEb$Fd
$y(;"hy
query */ honh'j
privateint beginIndex; )U/jD
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/** The default constructor */ R\j~X@vI
public Page(){ :eN&wQ5q
BWt`l,nF
} N /4E
~^2
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/** construct the page by everyPage #<{v~sVp&
* @param everyPage {6i|"5_j
* */ ejN/U{)jK'
public Page(int everyPage){ %OQdUH4x
this.everyPage = everyPage; wJp<ZL
} HsY5wC
@]3\*&R}
/** The whole constructor */ c -w #`
public Page(boolean hasPrePage, boolean hasNextPage, HDe\Oty_
}(EH5jZ'
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int everyPage, int totalPage, RGW@@
int currentPage, int beginIndex){ V_7\VKR
this.hasPrePage = hasPrePage; T{dQ4
c
this.hasNextPage = hasNextPage; N>mW64_H)
this.everyPage = everyPage; ug3\K83aj/
this.totalPage = totalPage; f{BF%;
this.currentPage = currentPage; v~$V
this.beginIndex = beginIndex; HNzxFnh
} MN?aPpr>
7|,L{~
/** p9v:T1?
* @return )Sn0Y B
* Returns the beginIndex. (bwD:G9
*/ 4 m:h&^`N
publicint getBeginIndex(){ 0 QTI;3
return beginIndex; !%>RHh[
} t. P@Ba^
lQ8hY$
/** mixsJ}e
* @param beginIndex rA~f68h|
* The beginIndex to set. EU[\D;
*/ fU>l:BzJK
publicvoid setBeginIndex(int beginIndex){ O}M-6!%<,
this.beginIndex = beginIndex; ON2o^-%=
} pz%s_g'
:=Olp;+_
/** #U:|-
a.>
* @return I&-r^6Yx
* Returns the currentPage. VLuHuih
*/ 4]o+)d.`(
publicint getCurrentPage(){ b\P:a_vq
return currentPage; -S$F\%
} gN/<g8
"*d6E}wG
/** JFT$1^n
* @param currentPage #Oka7.yz
* The currentPage to set. 25>R^2,LiE
*/ ibkB>n{(
publicvoid setCurrentPage(int currentPage){ )vW'g3u _
this.currentPage = currentPage; '1mk;%
} ]Lv3XMa
JK$3qUDnI
/** :nx+(xgw
* @return eF+F"|1h
* Returns the everyPage. 1K Vit{
*/ Sn nfU
publicint getEveryPage(){ ng}C$d . I
return everyPage; pGs?Y81
} `~XksyT
}UPC~kC+Z
/** H^d?(Svh
* @param everyPage D{(}&8a9
* The everyPage to set. Z^kE]Ir#EV
*/ 3x~7N
publicvoid setEveryPage(int everyPage){ ebBi zc=
this.everyPage = everyPage; j_<qnBeQ
} Xb"i/gfxt
|=0vgwd"S
/** VrIN.x
* @return x}/jh
* Returns the hasNextPage. Bsa;,
*/ Q.N!b7r7
publicboolean getHasNextPage(){ |[`YGA4
return hasNextPage; 5}%R
} [*
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a2P)@R
/** Lm[,^k
* @param hasNextPage uE1;@Dm+
* The hasNextPage to set. #D9.A7fCc5
*/ 'g%:/lwA
publicvoid setHasNextPage(boolean hasNextPage){ k[f2`o=
this.hasNextPage = hasNextPage; 3t-STk?
} 7Fj8Mp|
k
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/** )0/9
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* @return ?^U? ua6
* Returns the hasPrePage. Va )W[I
*/ h*R@ d
publicboolean getHasPrePage(){ 8KJUC&`
return hasPrePage; v~ >Bbe
} sU>IETo
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/** NgTB4I8P
* @param hasPrePage nP%U<$,+
* The hasPrePage to set. !h#ZbErW
*/ ,8r?C !m]
publicvoid setHasPrePage(boolean hasPrePage){ ,lH
}Ba02F
this.hasPrePage = hasPrePage; GL?b!4xx
} Erw1y,mF
NF0_D1Goi
/** NVRzthg%c_
* @return Returns the totalPage. sSU|N;"Y
* DKf(igw
*/ sJZ2e6?n
publicint getTotalPage(){ @_kF&~
return totalPage; 3YMqp~4
} Z"VP<-
[mzed{p]]
/** Rq|6d
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* @param totalPage jfG of*
* The totalPage to set. +j{Cfv$do
*/ |Y
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publicvoid setTotalPage(int totalPage){ (tYZq86`
this.totalPage = totalPage; A,F~*LXm
} pl).U#7`
wH?)ZL
} l:'#pZ4T
[2-n*a(q
SOI=~BGd)
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:^ywc O
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 ,!_6X9N-h
l_}d Q&R
个PageUtil,负责对Page对象进行构造: !~|-CF0z=
java代码: 9^F3r]bH
xnMcxys~
bB?E(>N;
/*Created on 2005-4-14*/ ]L~NYe9
package org.flyware.util.page; nh4G;qdU
6C2~0b
import org.apache.commons.logging.Log; 4-.W~C'Q
import org.apache.commons.logging.LogFactory; 2
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N" L&Z4Z
/** hnFpC1TO
* @author Joa 7
0?iZIK _
* _Gq6xv\b1
*/ #DgHF*GG+>
publicclass PageUtil { %_W4\
k7iko{5D
privatestaticfinal Log logger = LogFactory.getLog 4fsd5#
yU!1q}L!
(PageUtil.class); 3aq'JVq
3tZIL
/** ^7yt>
* Use the origin page to create a new page e%[*NX/
* @param page ;(?tlFc
* @param totalRecords i*=~mO8E
* @return K ~mUO
*/ kY$EK]s
publicstatic Page createPage(Page page, int
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YJv$,Z&;HO
totalRecords){ 2yK">xYY@
return createPage(page.getEveryPage(), c9nR&m8(+
YHEn{z7
page.getCurrentPage(), totalRecords); KZjh<sjX|
} W+&5G(z~
nmU1xv_
/** hiS|&5#
* the basic page utils not including exception ]$ "eGHX
~gpxK{
handler g[G/If
* @param everyPage 2#7|zhgb
* @param currentPage | @AXW
* @param totalRecords elR'e6Q
* @return page fF)Q;~_VA
*/ CI{2(.n4
publicstatic Page createPage(int everyPage, int 6=;:[
~W21%T+
currentPage, int totalRecords){ {T-\BTh&Q
everyPage = getEveryPage(everyPage); Q!P%duO
currentPage = getCurrentPage(currentPage); &DMC\R* j
int beginIndex = getBeginIndex(everyPage, kxhsDD$@p
1w=.vj<d8
currentPage); B!/kC)bF:
int totalPage = getTotalPage(everyPage, Em(_W5
ND{
fi
HE`]0
totalRecords); M>i(p%
boolean hasNextPage = hasNextPage(currentPage, jg?UwR&
NwF"Zh5eMW
totalPage); .u)KP*_
boolean hasPrePage = hasPrePage(currentPage); D;!sH?J@+
*5PQ>d
G
returnnew Page(hasPrePage, hasNextPage, .h W>#
everyPage, totalPage, ^i8,9T'=
currentPage, */e$S[5
]Uwp\2Bc
beginIndex); |1%%c
%
} >.qFhO\1so
*W8n8qG%T
privatestaticint getEveryPage(int everyPage){ >\1twd{u]
return everyPage == 0 ? 10 : everyPage; []A9j?_w
} [^
}$u[
xq;>||B
privatestaticint getCurrentPage(int currentPage){ 3?B1oIHQ
return currentPage == 0 ? 1 : currentPage; 9Vm
aB
} PaSwfjOnqr
%d+Fq=<
privatestaticint getBeginIndex(int everyPage, int Z@euO~e~
>3/mV<g f
currentPage){ 'KjH|u
return(currentPage - 1) * everyPage; d`=
~8`
} V<9L-7X 8
~+' f[!^
privatestaticint getTotalPage(int everyPage, int KRxJ2
1<vJuF^
totalRecords){ _-vlN
int totalPage = 0; LhAN( [
.h
<=C&Yg
if(totalRecords % everyPage == 0) 4vL\t
uoz
totalPage = totalRecords / everyPage; igQzL*X
else O.FTToh<
totalPage = totalRecords / everyPage + 1 ; ^!B]V>L-
<9&GOaJ
return totalPage; drAJ-ii
} oqvu8"
}$<v
privatestaticboolean hasPrePage(int currentPage){ p8 S~`fjV
return currentPage == 1 ? false : true; M%:\ ry4:
} R>"pJbS;L
J?{sTj"KB
privatestaticboolean hasNextPage(int currentPage, j?C[ids<
F7<M{h5s
int totalPage){ R7IFlQH%
return currentPage == totalPage || totalPage == U`)
";WN
?MywA'N@x
0 ? false : true; @8 c@H#H
} >0SG]er@
Jhj ]`$J
M5*Ln-qt(a
} 5xr2
i+S%e,U*
*As"U99(
<,O|fY%
W
~MNst?
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。 %J6>Vc!ix=
:JBtqpo2
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 YP!}Bf
DBy%"/c
做法如下: {6LS$3}VM
1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 \gT({XU?
E
@r &K
的信息,和一个结果集List: (Qw >P42J
java代码: -c8h!.Q$
w:I!{iX
k3LHLJZ#
/*Created on 2005-6-13*/ ^VzhjKSu
package com.adt.bo; V,zFHXO
*pO`sC>
import java.util.List; 9[~.{{Y
A~{vja0?
import org.flyware.util.page.Page; T
g(\7Kq
\1?'JdN
/** 8fQfu'LyjY
* @author Joa w}/+3z
*/ K
d#(eGe
publicclass Result { OGH,K'l
0WZd $
private Page page; KWYjN
h#*
sc-+?i
private List content; asQ^33g z
+i /4G.=*
/** D1ik*mDA=
* The default constructor PXl%"O%d
*/ s{c|J#s
public Result(){ o]]tH
super(); ijcF[bmE
} &D|+tu{
B)d 4]]4\\
/** B}zBbB
* The constructor using fields Z>/
*q2
* ^!O!HMX0
* @param page ]2&RN@
* @param content Nw,|4S
*/ QXa2qxTc
public Result(Page page, List content){ ifl
LY7j
this.page = page; /A>nsN?:]
this.content = content; {a2Gb
} );S8`V
@d8Nr:
/** W}k/>V_
* @return Returns the content. Te3 ?z
*/ mU[
publicList getContent(){ Tqs|2at<t
return content; +~==qLsU
} %ol1WG 9
`Um-Y'KE
/** -`X`Ff
* @return Returns the page. .Y!dO@$:
*/ M`9|8f,!a
public Page getPage(){ sw:a(o&$
return page; qx0F*EH|
} ;eW)&qzK
W8-vF++R
/** Vvv;m 5.
* @param content mYk~ ]a-
* The content to set. pFBK'NE
*/ d&ff1(j(
public void setContent(List content){ D)[(
this.content = content; ^%\MOjSN
} F[B=sI
Lv)1
)'v0
/** DdeKZ)8
* @param page =<TJ[,h
et
* The page to set. #op0|:/N
*/ bx-:aC)]2
publicvoid setPage(Page page){ ExFz@6@
this.page = page;
# xX
} [CAFh:o
} tu;Pm4q7
F0kAQgUv
(*T$:/zIS
SUvrOl
[{>1wJ Pdj
2. 编写业务逻辑接口,并实现它(UserManager, Zv8GrkK
MlbcJo3
UserManagerImpl) 9.9B#?
java代码: nYBa+>3BDf
X]W(
R$QhuxT|
/*Created on 2005-7-15*/ d*U<Ww^q
package com.adt.service; ?jvuTS 2
6y^GMlsI
import net.sf.hibernate.HibernateException; rz%^l1@-
>4+KEK
import org.flyware.util.page.Page; &xt
GabNk
Jy('tfAHp
import com.adt.bo.Result; <qI!Dj{
L7.SH#m
/** 0fqycGSmU
* @author Joa /cvMp#<]
*/ `z7,HJ.0c
publicinterface UserManager { rP!GS
_RG
wAL}c(EHO
public Result listUser(Page page)throws 7 Z?
Hyv
%E [HMq<H
HibernateException; *=T(ncR['
^oW{N
} |goK@<
M23r/eg]
9}4~3_gv;M
kZi/2UA5Z
(I35i!F+tY
java代码: uW!saT5o
UG}2q:ST
[r'A8!/|[
/*Created on 2005-7-15*/ !E)|[:$XT
package com.adt.service.impl; ' d?6 L
T{yJL<
import java.util.List; ~mMTfC~9
hMV>5Y[s
import net.sf.hibernate.HibernateException; 7;&,LH
)%lPKp4]
import org.flyware.util.page.Page; Vobq|Rd/%
import org.flyware.util.page.PageUtil; _c5*9')-)
G!h75G20
import com.adt.bo.Result; ]e+&Pxw]e
import com.adt.dao.UserDAO; Z aS29}
import com.adt.exception.ObjectNotFoundException; $ \o)-3
import com.adt.service.UserManager; tE-g]y3
B<a` o&?
/** >[~7fxjK-
* @author Joa -8<vW e
*/ J(wFJg\/
publicclass UserManagerImpl implements UserManager { GS}JyU
M.:JT31>1
private UserDAO userDAO; >VX'`5r>uw
Z_Y'#5o#
/** :F@goiuC
* @param userDAO The userDAO to set. 1X9s\JKQ
*/ Gzg3{fXl
publicvoid setUserDAO(UserDAO userDAO){ )}t't"
this.userDAO = userDAO; >mG64N
} Fop +xR,Z
0r8Wv,7Bo
/* (non-Javadoc) "^a"`?J
* @see com.adt.service.UserManager#listUser 2% OAQ(
bMNr +N
(org.flyware.util.page.Page) ZmNNR 1%/
*/ l=((>^i
public Result listUser(Page page)throws M]/DKo
3wcFR0f
HibernateException, ObjectNotFoundException { lBAu@M
int totalRecords = userDAO.getUserCount(); c"pOi&
if(totalRecords == 0) Hrph>v
throw new ObjectNotFoundException J_m@YkK
E-FR
w
("userNotExist"); '3WtpsKA
page = PageUtil.createPage(page, totalRecords); 7mMMVz2
List users = userDAO.getUserByPage(page); cDE5/!
returnnew Result(page, users); T#*H
} kxJ[Bi#
(Cfb8\~
} tMp!MQ
5b*knN>
SY%y *6[6
i1-%#YYF(
( }Bb=~
其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 x\f~Gtt7Y
o[fg:/5)A
询,接下来编写UserDAO的代码: G9yK/g&q
3. UserDAO 和 UserDAOImpl: Jww#zEK
java代码: _vDmiIn6K
:zLf~W
5g/,VMe
/*Created on 2005-7-15*/ }u=Oi@~
package com.adt.dao; ;l
ZKgi8`
wWiYxBeN
import java.util.List; a.}#nSYP
MGt>:&s(]
import org.flyware.util.page.Page; V
K 7
H"6x/&s.=k
import net.sf.hibernate.HibernateException; J{Kw@_ypP
jy?*` q1]
/** RLB"}&SF]
* @author Joa 6[c|14l
*/ {7z]+ h
publicinterface UserDAO extends BaseDAO { t'@mUX:-A
z[v4(pO6
publicList getUserByName(String name)throws C49\'1\6
k_7b0dr%F
HibernateException; ?X@[ibH6
QOSMV#Nw%
publicint getUserCount()throws HibernateException;
h-?yed*?
h72/03!
publicList getUserByPage(Page page)throws C8>
i{XOO,
\\#D!q*
HibernateException; YZ4`b-
+KIz#uqF8Z
} )Ak#1w&q
}RI_k&;
`cXLa=B)9
a(]&H
"
Zja3HGL
java代码: `?(J(H
xL"J?Gy
O& Sk}^
/*Created on 2005-7-15*/ phjM(lmCo
package com.adt.dao.impl; LkS tU)
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q=%h|
import java.util.List; *$fM}6}
D5@=#/?*
import org.flyware.util.page.Page; nsU7cLf"^V
w
a(Y[]V
import net.sf.hibernate.HibernateException; RdWn =;
import net.sf.hibernate.Query; &|GH@^)@
iIX%%r+
import com.adt.dao.UserDAO; SefhOh^,V
=JzzrM|V*
/** w+
!c9
* @author Joa -(:T&rfTp
*/ K?'m#}]
public class UserDAOImpl extends BaseDAOHibernateImpl 0j!3\=P$
<1*.:CL"s
implements UserDAO { mB_?N $K
xB Wl|j
/* (non-Javadoc) cLf90|YFp
* @see com.adt.dao.UserDAO#getUserByName s_NY#MPz[
hHJvLs>^
(java.lang.String) Eb[;nk?
*/ M11\Di1
publicList getUserByName(String name)throws :a;F3NJ
?;~E*kzO&
HibernateException { =M;F&;\8
String querySentence = "FROM user in class ?m]vk|>
Az:~|P
com.adt.po.User WHERE user.name=:name"; lOVcXAe}
Query query = getSession().createQuery @iuX~QA[9
J\*uW|=F
(querySentence);
QvZ"{
query.setParameter("name", name); 7wx=#
return query.list(); #17 &rizl
} <?7qI8 5OT
g,JfT^
/* (non-Javadoc) $lT8M-yK\
* @see com.adt.dao.UserDAO#getUserCount() ZDmL?mC
*/ >B0AJW/u
publicint getUserCount()throws HibernateException { K^fs#7
int count = 0; M@{?#MkS%
String querySentence = "SELECT count(*) FROM R%RbC!P
N~$>| gn
user in class com.adt.po.User"; #9|&;C5',!
Query query = getSession().createQuery qK.(wFx
s oY\6mHio
(querySentence); )]C]K B
count = ((Integer)query.iterate().next b=lJ`|
GO"|^W
()).intValue(); )v;O2z
return count; r=n{3o+
} $f3 IO#N
Qa=Y?=Za
/* (non-Javadoc) o@L0ET
* @see com.adt.dao.UserDAO#getUserByPage #8et91qw
f9u=h}
(org.flyware.util.page.Page) s;TB(M~i[
*/ ,K,st+s|
publicList getUserByPage(Page page)throws -yqgs>R(d
;"Gy5
HibernateException { \"ahs7ABT
String querySentence = "FROM user in class \o[][R#D
F@Sk=l(
com.adt.po.User"; j<(E%KN3
Query query = getSession().createQuery 9k;,WU(K<
&q<k0_5Q
(querySentence); z9S
(<