Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 ?.SGn[
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 +d6onO{8
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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 N.JR($N$
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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 ChTq !W
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。 Vc(4d-d5
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分页支持类: _d@YLd78P
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java代码: |Gf<Ql_.4
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package com.javaeye.common.util; o}v<~v(
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import java.util.List; U3{<+vSR`
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publicclass PaginationSupport { v0\l~_|H
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publicfinalstaticint PAGESIZE = 30; ]eKuR"ob0
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privateint pageSize = PAGESIZE; 4=^_VDlpd
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privateList items; bFG~08Z ,d
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privateint totalCount; ?:\/-y)Sp
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privateint[] indexes = newint[0]; ]%Eh"
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privateint startIndex = 0; =wh[D$n$~
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public PaginationSupport(List items, int eM<N?9 s
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totalCount){ ab2FK
setPageSize(PAGESIZE); ]bY|>q
setTotalCount(totalCount); e'K~WNT
setItems(items); efXnF*Z
setStartIndex(0); j;3I` :
} )q=F_:$
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public PaginationSupport(List items, int pN[WYM?[
vha9,5_
totalCount, int startIndex){ xsH1)
setPageSize(PAGESIZE); M@cFcykK
setTotalCount(totalCount); |T|m5V'l
setItems(items); mXRkR.zu+
setStartIndex(startIndex); 9lb?%UFe
} 1,fR kQ
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public PaginationSupport(List items, int PQ4mNjXN
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totalCount, int pageSize, int startIndex){ ,&_H
setPageSize(pageSize); X<%D@$
setTotalCount(totalCount); Oh! {E5!)
setItems(items); [[$CtqLg
setStartIndex(startIndex); ;:6\w!fc
} |`LH|6/
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publicList getItems(){ sLr47 NC
return items; 7 9tE
} ?8-Am[xH
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publicvoid setItems(List items){ WWunS|B!
this.items = items; `dZ|Ko%k
} .TGw+E1k
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publicint getPageSize(){ ?@'&<o0p#
return pageSize; aD: #AmbJ
} >&(#p@#
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publicvoid setPageSize(int pageSize){ 1{a%V$S[
this.pageSize = pageSize; DG;7+2U
} C8-7XQ=B:b
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publicint getTotalCount(){ cXb*d|-|N
return totalCount; o!tC{"g
} K?uZIDo
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publicvoid setTotalCount(int totalCount){ CYaN;HV@_
if(totalCount > 0){ ok\-IU?
this.totalCount = totalCount; K0.aU
int count = totalCount / 8&2+=<Q~
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pageSize; @su<h\)
if(totalCount % pageSize > 0) &D<R;>iI
count++; ` g]
indexes = newint[count]; G=:/v
for(int i = 0; i < count; i++){ yNvAT>H
indexes = pageSize * QL7b<xDQC*
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i; E=8'!
} zy,SL
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}else{ fmW{c mr|
this.totalCount = 0; RDdnOzx
} Ev7.!
} al2lC#Sy
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publicint[] getIndexes(){ kq}byv}3I
return indexes; 2z-Nw <bA
} w/6X9d
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publicvoid setIndexes(int[] indexes){ 11oNlgY&
this.indexes = indexes; kOydh(yE
} r07u6OA
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publicint getStartIndex(){ ^^b'tP1>
return startIndex; 7a"06Et^
} PeJ#9hI~rQ
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publicvoid setStartIndex(int startIndex){ dxX`\{E
if(totalCount <= 0) ]rv\sD`[
this.startIndex = 0; !6(3Y
elseif(startIndex >= totalCount) qZd*'ki<
this.startIndex = indexes `Z;Z^c
'[#y|
[indexes.length - 1]; u9"=t
elseif(startIndex < 0) 7P<VtS
this.startIndex = 0; h&'|^;FM
else{ l'"nU6B&
this.startIndex = indexes
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[startIndex / pageSize]; qX@e+&4P0
} 99=~vNn
} NH/A`Wm
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publicint getNextIndex(){ ?#z$(upQ
int nextIndex = getStartIndex() + Py; 5z
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pageSize; *)E${\1' <
if(nextIndex >= totalCount) d"FB+$
return getStartIndex(); G0
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else V?Jy
return nextIndex; $S#Z>d*1!
} 4A2}3$c9
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publicint getPreviousIndex(){ DkWp
int previousIndex = getStartIndex() - J+P<zC
tW UI?\
pageSize; <U3X4)r
if(previousIndex < 0)
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return0; jSp&\Wj b
else Qf~>5(,h
return previousIndex; M{jXo%C
} uMQI Aapb
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} {xZY4b2
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抽象业务类 .)tv'V/
java代码: 0f@+o}i=)
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/** .
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* Created on 2005-7-12 @[;'b$T$
*/
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package com.javaeye.common.business; 3RtVFDIZA"
%E_Y4Oe1
import java.io.Serializable; +@rFbsyJ.
import java.util.List; 5=?P6I_$G
B=cA$620
import org.hibernate.Criteria; Ic0Sb7c
import org.hibernate.HibernateException; /GgID!8
import org.hibernate.Session; <O+GXJ2
import org.hibernate.criterion.DetachedCriteria; |?88EG@05
import org.hibernate.criterion.Projections; 4;YP\{u
import QGpj$ _b
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org.springframework.orm.hibernate3.HibernateCallback; 2_wpj;E
import *HD(\;i-$
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org.springframework.orm.hibernate3.support.HibernateDaoS -PPwX~;!
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upport; }eLApFHEDg
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import com.javaeye.common.util.PaginationSupport; <SNr\/aCRi
*F( qg%1+
public abstract class AbstractManager extends Zv
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HibernateDaoSupport { S>dHBR#AD
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privateboolean cacheQueries = false; gCghWg{S
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privateString queryCacheRegion; A"7YkOfwH
WR #XPbk
publicvoid setCacheQueries(boolean I2/am8!u%
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cacheQueries){ I7U/={[J
this.cacheQueries = cacheQueries; 3P0z$jh"H
} \aJ>?
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publicvoid setQueryCacheRegion(String Vo"G@W)lZ
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queryCacheRegion){ `<tRfl}qs
this.queryCacheRegion = fn<dr(Dx
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queryCacheRegion; 4pL'c@'
} :P-H8*n""
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publicvoid save(finalObject entity){ 3V]dl)en%
getHibernateTemplate().save(entity); }Cu:BD.zQ
} uf?;;wg
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publicvoid persist(finalObject entity){ __}SHU0R
getHibernateTemplate().save(entity); r^Ra`:ca
} gOg7:VPG
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publicvoid update(finalObject entity){ I;@q`Tm
getHibernateTemplate().update(entity); mPA)G,^
} GSRf/::I}4
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publicvoid delete(finalObject entity){ q;9X8 _
getHibernateTemplate().delete(entity); }C @xl9S "
} &W>\Vl1
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publicObject load(finalClass entity, j*QdD\)
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finalSerializable id){ Qy9_tvq
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return getHibernateTemplate().load :0@0muo
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(entity, id); ?Q_ @@)
} 6?,qysm06
xtGit}
publicObject get(finalClass entity, J;>;K6pW
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finalSerializable id){ ILCh1=?{9r
return getHibernateTemplate().get al#(<4sJ
-+){ ;,
(entity, id); YAXd
} F(1E@xs
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publicList findAll(finalClass entity){ d\qszYP[
return getHibernateTemplate().find("from EF&CV{Sw
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" + entity.getName()); ir'<H<t2
} &7'=t6
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publicList findByNamedQuery(finalString HxK'u4I
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namedQuery){ 3z0Bg
return getHibernateTemplate \2u7>fU!
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().findByNamedQuery(namedQuery); O$z"`'&j#
} -)%\$z
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publicList findByNamedQuery(finalString query, 3q4VH q
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finalObject parameter){ 1[OY -G
return getHibernateTemplate MVMJl ">
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().findByNamedQuery(query, parameter); $-DW+|p.?^
} A23K!a2u&
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publicList findByNamedQuery(finalString query, ~V(>L=\V;
8/2Wq~&
finalObject[] parameters){ t_ CMsp
return getHibernateTemplate #>_t[9;
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().findByNamedQuery(query, parameters); ();Z,A
} 2L^/\!V#
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publicList find(finalString query){ &LM@xt4"^[
return getHibernateTemplate().find VXCB.C"
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(query); 0qR#o/~I
} W+u@UJi
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publicList find(finalString query, finalObject ;|T|*0vY[
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parameter){ u9:sj
return getHibernateTemplate().find oG22;
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(query, parameter); K:XXtG
} yq, qS0Fo
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public PaginationSupport findPageByCriteria <Y /3U
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(final DetachedCriteria detachedCriteria){ >l}v
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return findPageByCriteria L7- JK3/E
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); ral=`/p
} qKXg'1#E)
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q
public PaginationSupport findPageByCriteria -DGuaUU
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(final DetachedCriteria detachedCriteria, finalint ?b d&Av
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startIndex){ H^*[TX=#[
return findPageByCriteria CWZv/>,%
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(detachedCriteria, PaginationSupport.PAGESIZE, !]"M]tyv\
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startIndex); /W>?p@j+K
} aIT0t0.
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public PaginationSupport findPageByCriteria p8]X Ne
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(final DetachedCriteria detachedCriteria, finalint z__{6"^
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pageSize, 9XUYy2{G
finalint startIndex){ Fbotn(\h@
return(PaginationSupport) %N\45nYU:
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getHibernateTemplate().execute(new HibernateCallback(){ e}gGl<((g
publicObject doInHibernate (CDh,ZN;|
=sAOWI,8!
(Session session)throws HibernateException { 7F]oK0l_
Criteria criteria = !j6CvclT
!
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detachedCriteria.getExecutableCriteria(session); H5vg s2R
int totalCount = 1.2qh"#
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((Integer) criteria.setProjection(Projections.rowCount O?#<kmd/)
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()).uniqueResult()).intValue(); `,FA3boE
criteria.setProjection (<`>B
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(null); )fuAdG
List items = " u]X/
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criteria.setFirstResult(startIndex).setMaxResults ;[C_ho
yqb$,$
(pageSize).list(); c]ll89`||
PaginationSupport ps = ) WkN34Q
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new PaginationSupport(items, totalCount, pageSize, )CH\]>-FO
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startIndex); 6C_H0a/h&
return ps; j%S}
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} mg3YKHNG
}, true); ZV/g_i#
} MA=gCG/JD
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public List findAllByCriteria(final 5p.#nc!;y
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DetachedCriteria detachedCriteria){ LK|rLoia:
return(List) getHibernateTemplate xs)SKG*
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().execute(new HibernateCallback(){ c~Y g(
publicObject doInHibernate KWVl7Kw#e
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(Session session)throws HibernateException { rgv$MnG
Criteria criteria = Wsw/ D
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detachedCriteria.getExecutableCriteria(session); Y4Jaw2b
return criteria.list(); sVS),9\}
} p?s[I)e
}, true); `cmzmQC
} s|Vbc@t
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public int getCountByCriteria(final aH$DEs
*]S&V'Di
DetachedCriteria detachedCriteria){ HvG~bZN
Integer count = (Integer) ~Ctq
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getHibernateTemplate().execute(new HibernateCallback(){ Wh?3vZ^
publicObject doInHibernate X5)].[d
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(Session session)throws HibernateException { .P!pC
Criteria criteria = p ^I#9(PT
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detachedCriteria.getExecutableCriteria(session); x]"N:t
return L# .vbf
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criteria.setProjection(Projections.rowCount CDFX>>N
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()).uniqueResult(); .gwT?O,
} om0g'Qa
}, true); OYIH**?
return count.intValue(); H3|x
} w2]]##J
} $0~_)$i:
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用户在web层构造查询条件detachedCriteria,和可选的 Z=144n 1
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 JN<u4\e{-&
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PaginationSupport的实例ps。 &Y8S! W@4
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ps.getItems()得到已分页好的结果集 G4K3qD#+H
ps.getIndexes()得到分页索引的数组 WaDdZIz4
ps.getTotalCount()得到总结果数 V53iWWaFe
ps.getStartIndex()当前分页索引 lT-LOu|
ps.getNextIndex()下一页索引 !-|{B3"6
ps.getPreviousIndex()上一页索引 `yua?n
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 K2oyHw<mk
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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 05[k@f$n
,=t}|!jx
一下代码重构了。 {edjvPlk
kiR+ Dsl
我把原本我的做法也提供出来供大家讨论吧: aL0,=g%
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首先,为了实现分页查询,我封装了一个Page类: 8s<t*
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java代码: QR{pph*zn-
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/*Created on 2005-4-14*/ =bl6:
package org.flyware.util.page; $n9Bp'<
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/**
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* @author Joa L3^+`e
* 5(&'/U^
*/ U=\!`_f':
publicclass Page { /UPe@
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/** imply if the page has previous page */ 0%GQXiy
privateboolean hasPrePage; f-l(H="e
}*M>gvPo
/** imply if the page has next page */ Yuqt=\? #
privateboolean hasNextPage; 4^AdSuV
2:Q2w3Xe
/** the number of every page */ .0u@PcE:O
privateint everyPage; C:@JLZB
)_Wo6l)i
/** the total page number */ uO}UvMW
privateint totalPage; ^,N=GZRWW
dG*2-v^G
/** the number of current page */ ~jn~M_}K
privateint currentPage; 4ROuy+Ms'
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/** the begin index of the records by the current 3!0~/8!f@
e?)ic\K
query */ vSG$2g=
privateint beginIndex; )l"py9STF
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zDx*R3%
/** The default constructor */ };s8xGW:k3
public Page(){ 7xy[;
1;N5@0%p
} E [b6k&A
1|/]bffg!c
/** construct the page by everyPage iF'qaqHWY4
* @param everyPage !1cVg
ls|
* */ "kg;fF|
public Page(int everyPage){ Tg|/UUn
this.everyPage = everyPage; [5sa1$n96G
} s'yT}XQ;r
b1ma(8{{{
/** The whole constructor */ 3"y,UtKGa
public Page(boolean hasPrePage, boolean hasNextPage, Ht=h9}x"g
}D\i1/Y
~_Q1+ax}
int everyPage, int totalPage, aX{i
int currentPage, int beginIndex){ ,"EgYd8-'
this.hasPrePage = hasPrePage; 86<[!ZM
this.hasNextPage = hasNextPage; -"MB(`
this.everyPage = everyPage; }0z]sYI
this.totalPage = totalPage; t}q\.
this.currentPage = currentPage; AI\|8[kf0
this.beginIndex = beginIndex; we;QrS(Hi
} :o+&>z
b?{ \t;
/** < k?jt
* @return ?kKr/f4N
* Returns the beginIndex. q}0xQjpo
*/ @<,YUp,%S
publicint getBeginIndex(){ b'$fr6"O1
return beginIndex; {;| >Qn
} , UiA?7k
#Z>EX?VS:
/** u[G`_Y{=EM
* @param beginIndex ?A`8c R=)I
* The beginIndex to set. c#YW>(
*/ qxW^\u!<
publicvoid setBeginIndex(int beginIndex){ "0]s|ys6<
this.beginIndex = beginIndex; \:@yfI@
} HH3Ln+AWg_
7ajkp+E6
/** .`Rju|l
* @return nYbI =_-
* Returns the currentPage. <Gkmk?x`A
*/ z)&ZoSXWc
publicint getCurrentPage(){ ^7>k:|7-t
return currentPage; IMtfi(Y%F
} *N!>c&8
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/** 0; BX
* @param currentPage X[r\ Qa
* The currentPage to set. .T|1l$Jn
*/
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publicvoid setCurrentPage(int currentPage){ ~rICPR
this.currentPage = currentPage; [+4/M3J%
} HyKv5S$
6< O|,7=_
/** 0JS#{EDh+
* @return O{w'i|
* Returns the everyPage. q6a7o=BP]
*/ D +Ui1h-
publicint getEveryPage(){ w:+wx/\
return everyPage; T i!<{>
} g6p:1;Evf
Xah-*]ET
/** H". [&VP5Z
* @param everyPage
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* The everyPage to set. L
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*/ O|I)HpG;
publicvoid setEveryPage(int everyPage){ E/IoYuB
this.everyPage = everyPage; X8Y)5,`s
} Ia!B8$$'RP
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/** 5,Hj$v7fe
* @return >IFqwh7b
* Returns the hasNextPage. : 7Jpt3
*/ D,sb{N
publicboolean getHasNextPage(){ k^C^.[?
return hasNextPage; VS
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} bHf>EU
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/** tX@G`Mr(
* @param hasNextPage R7Z7o4jg
* The hasNextPage to set. "B3&v%b
*/ \~~y1.,U.
publicvoid setHasNextPage(boolean hasNextPage){ sm9/sX!
this.hasNextPage = hasNextPage; u-%|ZSg
} rS&"UH?c7
Wt
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/** |(77ao3
* @return Iq["(!7E5
* Returns the hasPrePage.
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*/ Q$lgC
v^M
publicboolean getHasPrePage(){ ]**h`9MF
return hasPrePage; yh:Wg$qx
} SQ0?M\D7
}K'gjs/N;
/** |rr<4>)X
* @param hasPrePage %]1.)j
* The hasPrePage to set. vtu!* 7m
*/ Y6w7sr_R
publicvoid setHasPrePage(boolean hasPrePage){ }{y(&Oy3Y
this.hasPrePage = hasPrePage; 7*I:cga
} 2.PZtl
OLs<]0H
/** K);)$8K
* @return Returns the totalPage. 3GVS-?
*
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*/ |zCT~#
publicint getTotalPage(){ 4157!w'\y
return totalPage; U *K6FWqiB
} V AnP3:
>Sc/E}3
/** "%E<%g
* @param totalPage KbTd`AIL
* The totalPage to set. unD.t
*/ vp|'Yy(9z
publicvoid setTotalPage(int totalPage){ h#JX$9
this.totalPage = totalPage; 67D{^K"KT
} Ahf71YP
&@ [pJ2
} Or3GrZ!H
tQWjNP~
e]DuV)k&
Bj*\)lG<
"J"RH:$v
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 H9%[!
RF
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个PageUtil,负责对Page对象进行构造: P1qQ)-J
java代码: 'dvi@Jx
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5`\"UC7?%
/*Created on 2005-4-14*/ /hp
[ +K
package org.flyware.util.page; %Kzu&*9Hb
Zgw4[GpL
import org.apache.commons.logging.Log; LTWiCI
import org.apache.commons.logging.LogFactory; XmAun
5hj
_YqQ7
/** z0T9tN!(
* @author Joa 7#+>1 "\
* C'.^2s#e8
*/ 'PWX19
publicclass PageUtil { y%!zXK`cl]
{!>'#
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privatestaticfinal Log logger = LogFactory.getLog /1 h ${mo~
d.xT8l}sS
(PageUtil.class); Y.
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@p%WFNR0
/** 4Is Wp!`W
* Use the origin page to create a new page 9}A\BhtiM
* @param page l8 H8c &
* @param totalRecords +%=lu14G
* @return \5P 5N]]
*/ x T1MW
publicstatic Page createPage(Page page, int X4CiVV
j.kv!;Rj=
totalRecords){ nq
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return createPage(page.getEveryPage(), k7kPeq
}uiD8b{I
page.getCurrentPage(), totalRecords); au#/Q
} wK!7mZ
h!J|4Qa
/** Ejt?B')aB5
* the basic page utils not including exception A_g\Fa[jG
lS{ ^*(a
handler %:N;+1
* @param everyPage wnjAiIE5
* @param currentPage G#YBfPmr
* @param totalRecords Ia j`u
* @return page w0P Atu
*/ R5N~%Dg)3
publicstatic Page createPage(int everyPage, int ^Eif~v
te;VGpv.
currentPage, int totalRecords){ :_[pZ;-@
everyPage = getEveryPage(everyPage); y*e({fio_
currentPage = getCurrentPage(currentPage); sL],@z8<k
int beginIndex = getBeginIndex(everyPage, {RN-rF3w
sB0m^Y'
currentPage); JH._/I
int totalPage = getTotalPage(everyPage, 3}5Ya\x
}CM#jN?(
totalRecords); snP]&l+
boolean hasNextPage = hasNextPage(currentPage, d+p^fBz
:%<'('S|
totalPage); .^8rO,H[
boolean hasPrePage = hasPrePage(currentPage); c)Ne/E{!0
s\ e b
returnnew Page(hasPrePage, hasNextPage, %?Q<
everyPage, totalPage, 1EWskmp
currentPage, K"cV7U rE
:Q ?p^OC
beginIndex); &2r[4
} +zf`_1+)U
%gu |
privatestaticint getEveryPage(int everyPage){ C:.>*;?7
return everyPage == 0 ? 10 : everyPage; 4mvnFY}
} #<d'=R[AK
]JQ}9"p=5
privatestaticint getCurrentPage(int currentPage){ M44$E4a20
return currentPage == 0 ? 1 : currentPage; Ym?VF{e,
} 0[p"8+x
N<XMSt
privatestaticint getBeginIndex(int everyPage, int X7txAp.
'.]<lh!
currentPage){ LKgo(&mY
return(currentPage - 1) * everyPage; <6&Z5mpm$w
} q;.LK8M
45H9pY w
privatestaticint getTotalPage(int everyPage, int Y/T-2)D
@<koL
totalRecords){ |3BxNFe`%
int totalPage = 0; xAr&sGMA
)JhB!P(
if(totalRecords % everyPage == 0) O-!Q~;3][
totalPage = totalRecords / everyPage; W9;9\k
else X/h|;C*9
totalPage = totalRecords / everyPage + 1 ; MS\?+8|SV(
Ec&_&
return totalPage; Z+ _xX
} Y+eDE:4
|3g'~E?$
privatestaticboolean hasPrePage(int currentPage){ %$N,6}n
return currentPage == 1 ? false : true; ?3gf)g=
} DDj:(I?,w
AWg'J
privatestaticboolean hasNextPage(int currentPage, "A0y&^4B@
Bm;:
cmB0e
int totalPage){ .:O($9^Ho
return currentPage == totalPage || totalPage == G +AP."M?
:mhO/Bx
0 ? false : true; N]-skz<v
} >z73uKA(
R&Ss ET.
<{i1/"k?X
} Js^(mRv=
Zr(eH2}0D
eQ*zi9na
gHFQs](G.
3R%yKa#
上面的这两个对象与具体的业务逻辑无关,可以独立和抽象。 i:Gyi([C
~=9S AJr]
面对一个具体的业务逻辑:分页查询出User,每页10个结果。具体 Qe_C^(P
rONz*ly|i
做法如下: WLiF D.
1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 N*+WGsxl$z
|Xt6`~iC
的信息,和一个结果集List: _na/&J6
java代码: |l@z7R+4*
WM7LCP
*JAC+<~d
/*Created on 2005-6-13*/ ^oR
qu
package com.adt.bo; 4'td6F
&Zjs
import java.util.List; 'K\H$<CJ
g_rk_4]
import org.flyware.util.page.Page; (\nEU! Y
OIkjO}/7
/** K"ly\$F
* @author Joa @>&b&uj7T
*/ D=K{(0{"/,
publicclass Result { \-sW>LIA
s>%.bAxc
private Page page; d[Zx [=h
f4VdH#eng`
private List content; /PbMt
7}e5a c
/** 5 Pf)&iG
* The default constructor % bKy
*/ gLg.mV1<
public Result(){ <$ qT(3w<y
super(); y}?PyPz
} [("2=Uz;
.m.Ga|;
/** O8Z+g{
* The constructor using fields D5:|CMQ
* DK20}&RQ
* @param page :4)(Qa(
* @param content n5)ml)m
*/ Ti7
@{7>
public Result(Page page, List content){ 9_8\xLk
this.page = page; 85$ WH
this.content = content; Bd- &~s^
} K_k'#j~*?
9|Ylv:sR
/** |nm}E_
* @return Returns the content. (xKypc+j
*/ }^VikT]>1
publicList getContent(){ /%gMzF
return content; \UX9[5|
} +3sbpl2}
&%g$Bi,G
/** #XG3{MGX[
* @return Returns the page. R / ND f`
*/ A~X\ dcn
public Page getPage(){ =yoR>llbBC
return page; a8-V`
}
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cc>b#&s
/** CIf@G>e-
* @param content k7j[tB#
* The content to set. CD5% iFy
*/ My Ky*wD
public void setContent(List content){ 6uKP
BL@,
this.content = content; # ,97 ]
} |'I>Ojm
KW3<5+w]c
/** <L<^uFB
* @param page u /DE
* The page to set. j@Pd"
Z9
*/ 7GS4gSd3
publicvoid setPage(Page page){ %3AE2"
this.page = page; pvb&vtp
} l<+PA$+}}
} %nG>3.%
^Wn+G8n
HF"TS*
oE6`]^^
%*o
2. 编写业务逻辑接口,并实现它(UserManager, &5XEjY>@
2 |JEGyDS-
UserManagerImpl) +H *6:
java代码: 587;2
6 EfBz
:RxMZwa=
/*Created on 2005-7-15*/ iX<" \pV
package com.adt.service; wwQ2\2w>Hm
NHe)$%a=H
import net.sf.hibernate.HibernateException; byMy-v;
)l.uj
import org.flyware.util.page.Page; *j,bI Y&se
)=`DEbT
import com.adt.bo.Result; `'>~(8&zE
R
eb.x_
/** Q1ayd$W@<
* @author Joa <mj/P|P@
*/ lpS v
publicinterface UserManager { Dsn=fht
m*CW3y{n)
public Result listUser(Page page)throws ^fH)E"qq5
/8nUecr
HibernateException; z>iXNwz"?
1P'A*`!K
} 'Bxj(LaV-
6 eu7&Kj'
G
9(*F
JtsXMZz
l'@!'
java代码: B3D}'<
VBS}2>p
"A&A?%
/*Created on 2005-7-15*/ \13Q >iAu
package com.adt.service.impl; *3!r &iY
i*$~uuY
import java.util.List; =wW M\f`=
|=0w_)Fa]
import net.sf.hibernate.HibernateException; </@5>hx/
x
DNu'
import org.flyware.util.page.Page; j@^zK!mO
import org.flyware.util.page.PageUtil; c
q[nqjC=
-Eig#]Se3
import com.adt.bo.Result; =:xX~,qmv
import com.adt.dao.UserDAO; UNwjx7usD
import com.adt.exception.ObjectNotFoundException; *OdmKVw6G
import com.adt.service.UserManager; _+nk3-yQw
'+Z Jf&Ox
/** Ge=^q.
* @author Joa Rm}5AJ
*/ C.":2F;-e
publicclass UserManagerImpl implements UserManager { jDTG15_=
R4R\B
private UserDAO userDAO; :T?WN+3
C22h*QM*
/** &4sz:y4T>
* @param userDAO The userDAO to set. e`H>}O/ai
*/ O[eU{;P
publicvoid setUserDAO(UserDAO userDAO){ X}i2 qv
this.userDAO = userDAO; KdYR?rY
} &0\:MJc
K3`!0(
/* (non-Javadoc) l4.ql1BX@y
* @see com.adt.service.UserManager#listUser =$^90Q,Z;
}* }F_Y+
(org.flyware.util.page.Page) ::'Y07
*/ ~piE$"]&
public Result listUser(Page page)throws HeO&p@
RticGQy&5
HibernateException, ObjectNotFoundException { 5h^BXX|Y*
int totalRecords = userDAO.getUserCount(); 1?^
P=^8
if(totalRecords == 0) Ejr'Yzl3_
throw new ObjectNotFoundException /kK!xe
q~5zv4NX
("userNotExist"); bZ:+q1
D
page = PageUtil.createPage(page, totalRecords); *PV7s
List users = userDAO.getUserByPage(page); \`["IkSg7
returnnew Result(page, users); 9}a$0H
h
} ]\A=[T^
zVf79UrK
} On~KTt3Mp
rc<Ix
)8rF'pxI
o _l_Yi
3 yb]d5:U
其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 M%Rr=
]+m2pEO
询,接下来编写UserDAO的代码: 4e .19H9
3. UserDAO 和 UserDAOImpl: 8#tuB8>
java代码: oF]]Pl{W
I=
<eCv
koS?UYF`
/*Created on 2005-7-15*/ )u28:+8
package com.adt.dao; "*j8G8
hY%} x5ntU
import java.util.List; >`a^E1)
94dd )/a
import org.flyware.util.page.Page; ,%N[FZ`|
xP9h$!
import net.sf.hibernate.HibernateException; p=A,yGDV
7RBEEE`)
/** (3D&