Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 yHYsZ,GE
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 qfF~D0}
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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 A.F%Ycq
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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 P.se'z)E
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分页支持类: k:i4=5^*GX
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java代码: !"e5h`/ADM
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package com.javaeye.common.util; U)TUOwF
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import java.util.List; D_ 2:k'4
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publicclass PaginationSupport { j a[Et/r
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publicfinalstaticint PAGESIZE = 30; HdI8f!X'TG
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privateint pageSize = PAGESIZE; Y>z>11yEB0
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privateList items; /V8#[9K
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privateint totalCount;
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privateint[] indexes = newint[0]; CZe ]kXNv
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privateint startIndex = 0; X56q-|
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public PaginationSupport(List items, int h
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totalCount){ ;a!S!%.h
setPageSize(PAGESIZE); >{]%F*p4
setTotalCount(totalCount); fm%t^)E
setItems(items); tIi&;tw]
setStartIndex(0); `RT>}_j
} YDsb3X<0'
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public PaginationSupport(List items, int 7Die
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totalCount, int startIndex){ ;O5zUl-`
setPageSize(PAGESIZE); + J{IRyBc
setTotalCount(totalCount); 4B;=kL_f
setItems(items); )m+W
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setStartIndex(startIndex); bP#:Oi0v`
} uc{Ihw
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public PaginationSupport(List items, int Kn{4;Xk\
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totalCount, int pageSize, int startIndex){ q$UJ$7=f8
setPageSize(pageSize); \7eUw,~Q>
setTotalCount(totalCount); #MkTkm&r
setItems(items); ztY}5A2`
setStartIndex(startIndex); Paq4
} p>N(Typ0b
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publicList getItems(){ //MUeTxR
return items; bj^5yX;2
} ]cvwIc">
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publicvoid setItems(List items){ 1\m[$Gs:
this.items = items; P; no?
} Q*cf(
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publicint getPageSize(){ iVr J Q
return pageSize; rXq.DvQ
} A@('pA85
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publicvoid setPageSize(int pageSize){ (E3b\lST
this.pageSize = pageSize; :,7hWs
} kH1~k,|\&K
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publicint getTotalCount(){ DfD&)tsMQ
return totalCount; >6-`}G+|
} 5;WH:XM
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publicvoid setTotalCount(int totalCount){ (lqC[:
if(totalCount > 0){ a-tmq]]E
this.totalCount = totalCount; VQ@
int count = totalCount / =XQ%t
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pageSize; -i|}m++
if(totalCount % pageSize > 0) ~8+ Zs
count++; 7A7?GDW
indexes = newint[count]; G_JA-@i%
for(int i = 0; i < count; i++){ r;2^#6/Z
indexes = pageSize * ; 2#y7!
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i; s8Q 5ui]
} 8,%^
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}else{ cjY-y-vO
this.totalCount = 0; Ax@$+/Z!
} (CL%>5V
} } OR+Io
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publicint[] getIndexes(){ >=>2m2z=
return indexes; j$:~Rek
} }X6m:#6
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publicvoid setIndexes(int[] indexes){ rlLMT6r.8
this.indexes = indexes; w&#]-|$
} ioCsV
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publicint getStartIndex(){ G` A4|+W"
return startIndex; RqrdAkg
} d0ksG$
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publicvoid setStartIndex(int startIndex){ p2](_}PK
if(totalCount <= 0) |{ip T SH
this.startIndex = 0; #6=
elseif(startIndex >= totalCount) bH~dJFj/
this.startIndex = indexes fHFE){
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[indexes.length - 1]; (9a^$C*
elseif(startIndex < 0) ZECfR>`x
this.startIndex = 0; ktIFI`@w)
else{ 2+XAX:YD
this.startIndex = indexes WyiQoN'q
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[startIndex / pageSize]; o]V^};B
} /{I$ #:M
} N!}f}oF
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publicint getNextIndex(){ >t+P(*u
int nextIndex = getStartIndex() + ccxNbU
~}
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pageSize;
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if(nextIndex >= totalCount) dZuOrTplA
return getStartIndex(); sI2^Qp@O1
else u ga_T
return nextIndex; 2=}FBA,2
} ~W/z96'
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publicint getPreviousIndex(){ 53h0UL
int previousIndex = getStartIndex() - "[N!m1i:{
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pageSize; 6A ah9
if(previousIndex < 0) Fr-SvsNFB
return0; 4qa.1j(R/
else l]SX@zTb
return previousIndex; /-s6<e!
} K
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} e3\T)x&=
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抽象业务类 7+*WH|Z@
java代码: zuCSj~
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/** $cgcX
* Created on 2005-7-12 PvL[e"p
*/ 6u%&<")4HP
package com.javaeye.common.business; Xa&kIq}(g
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import java.io.Serializable; '%;m?t%q
import java.util.List; .\mj4*?/
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import org.hibernate.Criteria; !u hT
import org.hibernate.HibernateException; {8etv:y
import org.hibernate.Session; Ort(AfW
import org.hibernate.criterion.DetachedCriteria; \. S/|
import org.hibernate.criterion.Projections; JGZBL{8
import V[V[~;Py
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org.springframework.orm.hibernate3.HibernateCallback; N>E_%]C h
import CN?gq^
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org.springframework.orm.hibernate3.support.HibernateDaoS }0 ?3:A
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upport; _v:SP
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import com.javaeye.common.util.PaginationSupport; L50n8s
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public abstract class AbstractManager extends l"]V6!-U
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HibernateDaoSupport { w(F%^o\
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privateboolean cacheQueries = false; 3gzXbP,
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privateString queryCacheRegion; vD4*&|8T#
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publicvoid setCacheQueries(boolean !m$jk2<
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cacheQueries){ *ui</+
this.cacheQueries = cacheQueries; !9x}
} S>{~nOYt-`
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publicvoid setQueryCacheRegion(String \NC3'G:Ii
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queryCacheRegion){ :EyD+!LJ
this.queryCacheRegion = QW"! (`K
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queryCacheRegion; _B0L.eF
} v,t:+
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publicvoid save(finalObject entity){ NVs@S-rpX
getHibernateTemplate().save(entity); SAz
} W9)&!&<o
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publicvoid persist(finalObject entity){ svSVG:48
getHibernateTemplate().save(entity); snJ129}A
} @XVTU
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publicvoid update(finalObject entity){ W8<%[-r
getHibernateTemplate().update(entity); g=rbPbu
} ~5g ~;f[4
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publicvoid delete(finalObject entity){ ctUp=po
getHibernateTemplate().delete(entity); `x|?&Ytmf9
} Mfs?x
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publicObject load(finalClass entity, K%d&EYoW]
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finalSerializable id){ BuwY3F\-O
return getHibernateTemplate().load W4N{S.#!
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(entity, id); _j3f Ar(V
} &FD>&WRV
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publicObject get(finalClass entity, kP"9&R`E
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finalSerializable id){ O84i;S+-p
return getHibernateTemplate().get ;aBG,dr}i
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(entity, id); <qSC#[xu
} pUTr!fR
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publicList findAll(finalClass entity){ ,)XLq8
return getHibernateTemplate().find("from weQ_*<5%
(?c-iKGc
" + entity.getName()); E3i4=!Y
} Y}/-C3)
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publicList findByNamedQuery(finalString T|p"0b A
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namedQuery){ *Uh!>Iv;
return getHibernateTemplate Jvi#)
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().findByNamedQuery(namedQuery); ~BF&rx5Q
} Gq6*SaTk
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publicList findByNamedQuery(finalString query, s S
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finalObject parameter){ y(&Ac[foS}
return getHibernateTemplate \lY_~*J
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().findByNamedQuery(query, parameter); }#J/fa9
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} qLCR] _*
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publicList findByNamedQuery(finalString query, #ABCDi={zA
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finalObject[] parameters){ XG?8s
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return getHibernateTemplate l.]xB,k
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().findByNamedQuery(query, parameters); B1gR5p 0
} ==B6qX8T
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publicList find(finalString query){ No$3"4wk
return getHibernateTemplate().find 9^x> 3Bo
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(query); i@q&5;%%
} =*Lfl'sr_
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publicList find(finalString query, finalObject ^pS~Z~[d/
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parameter){ gr{ DWCK
return getHibernateTemplate().find gIfh3 D=yX
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(query, parameter); 7^285)UQA
} ,+VGSd
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public PaginationSupport findPageByCriteria 7=uj2.J6
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(final DetachedCriteria detachedCriteria){ e.%nRhSs3
return findPageByCriteria +t.b` U`-
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); "4Nt\WQ
} /
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public PaginationSupport findPageByCriteria T|$H#n}
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(final DetachedCriteria detachedCriteria, finalint #4:?gfIj
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startIndex){ km(Po}
return findPageByCriteria im8 CmQ
S/ *E,))m
(detachedCriteria, PaginationSupport.PAGESIZE, ~u{uZ(~
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startIndex); y-k.U%
} |)&%A%m
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public PaginationSupport findPageByCriteria =l6mL+C
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(final DetachedCriteria detachedCriteria, finalint \+etCo
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pageSize, _$'ashF
finalint startIndex){ >z03{=sAN
return(PaginationSupport) \zY!qpX<
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getHibernateTemplate().execute(new HibernateCallback(){ sB</DS
publicObject doInHibernate T%Lx%Qn
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(Session session)throws HibernateException { EPm/r
Criteria criteria = Wzh`or
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detachedCriteria.getExecutableCriteria(session); "[k3kAm
int totalCount = 6<]lW
. vV|hSc
((Integer) criteria.setProjection(Projections.rowCount S!UaH>Rh
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()).uniqueResult()).intValue(); s*[bFJwN
criteria.setProjection ,hVli/
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(null); &HW9Jn
List items = Za9qjBH
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criteria.setFirstResult(startIndex).setMaxResults l;Wj]
+2{Lh7Ks
(pageSize).list(); vQCy\Gi
PaginationSupport ps = l-Z4Mq6*L
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new PaginationSupport(items, totalCount, pageSize, UfGkTwoo=
= [E
startIndex); 3n _htgcv
return ps; fu5=k:/c
} *pq\MiD/
}, true); ! mHO$bQ"
} ]DcFySyv
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public List findAllByCriteria(final ueudRb
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DetachedCriteria detachedCriteria){ O-^Ma-}
return(List) getHibernateTemplate 6Oq7#3]
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().execute(new HibernateCallback(){ mt
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publicObject doInHibernate KoT\pY^7\
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(Session session)throws HibernateException { @dKTx#gZ
Criteria criteria = ;p//QJB9
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detachedCriteria.getExecutableCriteria(session); jd:6:Fm
return criteria.list(); j%kncGS
} dN q$}
}, true); ;l+Leex
} L0,'mS
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public int getCountByCriteria(final *@5 @,=d
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DetachedCriteria detachedCriteria){ IxU/?Zm
Integer count = (Integer) sRs>"zAg
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getHibernateTemplate().execute(new HibernateCallback(){ la!~\wpa
publicObject doInHibernate G{}VPcrbC
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(Session session)throws HibernateException { Ml_^
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Criteria criteria = HJ"GnZp<
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detachedCriteria.getExecutableCriteria(session); [y(MCf19
return [0!( xp^
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criteria.setProjection(Projections.rowCount j#|ZP-=1_
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()).uniqueResult(); Wr
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} >MZ/|`[M
}, true); {: /}NpA$
return count.intValue(); ?,z}%p
} ch]IzdD
} M`_0C38
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用户在web层构造查询条件detachedCriteria,和可选的 Wtnfa{gP%
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 vx
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PaginationSupport的实例ps。 }f ?y*
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ps.getItems()得到已分页好的结果集 >*bvw~y,
ps.getIndexes()得到分页索引的数组 0-gAyiKx?
ps.getTotalCount()得到总结果数 "+c-pO`Wg
ps.getStartIndex()当前分页索引 kh<2BOV
ps.getNextIndex()下一页索引 h[ ZN+M
ps.getPreviousIndex()上一页索引 ?6!LL5a.
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 \V:^h[ad
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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 pg.%Pdr<$
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一下代码重构了。 lZ0 =;I
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我把原本我的做法也提供出来供大家讨论吧: 3`HV(5U[
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首先,为了实现分页查询,我封装了一个Page类: jPeYmv]
java代码: <@}9Bid!o
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/*Created on 2005-4-14*/ _F{C\}
package org.flyware.util.page; ~&O%N
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/** PF2nLb2-
* @author Joa G$PE}%X
* INf&4!&h
*/ CLSK'+l
publicclass Page { Xj*Wu_
hZ3bVi)L\
/** imply if the page has previous page */ E`q_bn
privateboolean hasPrePage; #$vEGY}1
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/** imply if the page has next page */ :gT4K-Oj
privateboolean hasNextPage; 6~{C.No}
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/** the number of every page */ J4utIGF
privateint everyPage; :N@^?q{b
qR.Q,(b|
/** the total page number */ N!3 2 wJ
privateint totalPage; ^8tEach
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/** the number of current page */ )"LJ
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privateint currentPage; +p^u^a
l%ZhA=TKQ
/** the begin index of the records by the current zT/\Cj68
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query */ d _
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privateint beginIndex; DlT{`
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/** The default constructor */ P2!C|SLK
public Page(){ O f#:
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} +V+a4lU14
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/** construct the page by everyPage HDKbF/
* @param everyPage &zs$x?/
* */ DMS!a$4
public Page(int everyPage){ y]imZ4{/
this.everyPage = everyPage; :EH=_"
} >+waX"e
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/** The whole constructor */ :LTN!jj
public Page(boolean hasPrePage, boolean hasNextPage, 3F0 N^)@
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int everyPage, int totalPage, xpI wrJO
int currentPage, int beginIndex){ b\ PgVBf9
this.hasPrePage = hasPrePage; dd["dBIZ '
this.hasNextPage = hasNextPage; RyN s6
this.everyPage = everyPage; bfO=;S]b!
this.totalPage = totalPage; 9Ee'Cm
this.currentPage = currentPage; 8[>zG2
this.beginIndex = beginIndex; nd(S3rct&
}
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/** 8] ikygt"
* @return E e]-qN*8
* Returns the beginIndex. qa6,z.mQ
*/ T Ge_G_'o
publicint getBeginIndex(){ *qMY22X
return beginIndex; SB7c.H,
} LF7SS;&~f
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/** ZB&6<uw
* @param beginIndex }&e5$lB
* The beginIndex to set. ipILG4
*/ 'RRE|L,
publicvoid setBeginIndex(int beginIndex){ y?:.;%!E
this.beginIndex = beginIndex; \;-|-8Q
} 9/7u*>:
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/** %IRi1EmN8
* @return wf$s*|z
* Returns the currentPage. KdlQ!5(?X
*/ bTu9;(
publicint getCurrentPage(){ p$>l7?h
return currentPage; BUR*n;V`
} -gWZwW/lD
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/** )Wox Mmz
* @param currentPage j+(I"h3
* The currentPage to set. ZW}_Qs
*/ g[t [/TV
publicvoid setCurrentPage(int currentPage){ * H9 8Du
this.currentPage = currentPage; W];dD$Oqg
} (~en (
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/** eIo7F m
* @return kxRV)G
* Returns the everyPage. g4@ lM"|S
*/ ``Un&-Ms
publicint getEveryPage(){ l (%1jC8
return everyPage; JLJ;TM'4=
} "Yca%:
@]#1(9P
/** w-{c.x
* @param everyPage p"Z-6m~
* The everyPage to set. eN~=*Mn(za
*/ 3{h_&Gbo'D
publicvoid setEveryPage(int everyPage){ 6x|jPb
this.everyPage = everyPage; $j?1g#
} ~!3r&(
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/** 9$m|'$p3sG
* @return C/&-l{7
* Returns the hasNextPage. ,=mS,r7
*/ D )'bH5
publicboolean getHasNextPage(){ TW>WHCAm
return hasNextPage; ;ZG\p TCA
} uOGw9O-d9
ilva,WFa^
/** fg{n(TE"8
* @param hasNextPage X~i<g?]
* The hasNextPage to set. Y)a^(!<H<
*/ evJ.<{M
publicvoid setHasNextPage(boolean hasNextPage){ vA.MRu#
this.hasNextPage = hasNextPage; ,'iE;o{Tu
} Jdp3nzM^^@
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/** A_#DJJMm
* @return ',4iFuY
* Returns the hasPrePage.
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*/ @Pzu^
publicboolean getHasPrePage(){ "v4B5:bmqW
return hasPrePage; O5t[
} gOOPe5+ J
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/** y<bDTeoo
* @param hasPrePage BFJnV.0M!
* The hasPrePage to set. yEj^=pw
*/ E1U",CMU
publicvoid setHasPrePage(boolean hasPrePage){ /_#q@r4ZQ
this.hasPrePage = hasPrePage; f.`*Qg L
} x7x\Y(@
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/** !o[7wKrXb
* @return Returns the totalPage. !GEJIefx_
* {3{"8-18
*/ yN
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publicint getTotalPage(){ VEw"
return totalPage; HuKc9U'7A
} hzbw>g+
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/** ">jj
* @param totalPage 5=?\1`e1[
* The totalPage to set. f\>M'{cV
*/ +|89>}w4
publicvoid setTotalPage(int totalPage){ t=O8f5Pf{
this.totalPage = totalPage; T+k{W6
} U,- 39mr
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} 58J}{Req
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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 o/Q;f@
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个PageUtil,负责对Page对象进行构造: s;vHPUB\n
java代码: .:QLk&a,:,
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/*Created on 2005-4-14*/ #c?j\Y9nz
package org.flyware.util.page; +sUFv)!4
#"\gLr_:m
import org.apache.commons.logging.Log; ,+{LYF
import org.apache.commons.logging.LogFactory; Pjjewy1}^
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/** lun\`f 5Q
* @author Joa M`i\VG
* {I #]@,
*/ mFaZio0GK
publicclass PageUtil { D(RTVef
^y1j.M@q
privatestaticfinal Log logger = LogFactory.getLog (/j/>9iro
#& Rw&
(PageUtil.class); 1\>^m
}h!f eP
/** T<p !5`B 1
* Use the origin page to create a new page u5: q$P
* @param page /%TI??PGu
* @param totalRecords uIZ -#q
* @return IrhA+)pdse
*/ iQ
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publicstatic Page createPage(Page page, int i/ )am9
@u]rWVy;\[
totalRecords){ Xudg2t)+K
return createPage(page.getEveryPage(), Dq5j1m.
X4E%2-m@'
page.getCurrentPage(), totalRecords); ^_u kLzP9
} \6<=$vD
lWc:$qnR-K
/** s1NKLt
* the basic page utils not including exception fM63+9I)\
D.Q=]jOs
handler ruzspS
* @param everyPage .my0|4CQ#@
* @param currentPage $yYO_ZBiy
* @param totalRecords e<h~o!za
* @return page An"</;HU
*/ (>GK\=:<
publicstatic Page createPage(int everyPage, int qA$*YIlK
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currentPage, int totalRecords){ 7-T{a<g
everyPage = getEveryPage(everyPage); Q&g^c2
currentPage = getCurrentPage(currentPage); J}+6UlD
int beginIndex = getBeginIndex(everyPage, >wBJy4:
X+}1
currentPage); pxf$1
int totalPage = getTotalPage(everyPage, <$~mE9a6
#Av.iAs
totalRecords); :1^R9yWA4
boolean hasNextPage = hasNextPage(currentPage, 1ilBz9x*!
q+]h=:5=I
totalPage); \lC
boolean hasPrePage = hasPrePage(currentPage); K7W6ZH9;
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returnnew Page(hasPrePage, hasNextPage, dJ""XaHqf
everyPage, totalPage, [YT>*BH ?
currentPage, \y)
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6B
beginIndex); ";Rtiiu
} $8[r9L!
qt
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privatestaticint getEveryPage(int everyPage){ S. q].a
return everyPage == 0 ? 10 : everyPage; ct,l^|0Hu8
} F>[,zN
;Uu(zhbj
privatestaticint getCurrentPage(int currentPage){ me ks
RcF
return currentPage == 0 ? 1 : currentPage; mP P`xL?T
} p>;_e(
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privatestaticint getBeginIndex(int everyPage, int '07P&g-
1u(.T0j7f
currentPage){ a5!Fv54
return(currentPage - 1) * everyPage; $3uKw!z
} I=9!Rs(QF
+d!v}aJ
privatestaticint getTotalPage(int everyPage, int %\r!7@Q
.h5[Q/*h
totalRecords){ .]7Qu;L
int totalPage = 0; H0SQ"?
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if(totalRecords % everyPage == 0) pL%r,Y_^\x
totalPage = totalRecords / everyPage; {=-\|(Bx
else uDSxTz{
totalPage = totalRecords / everyPage + 1 ; u(t#Ze~Y1
~\3kx]^10
return totalPage; Z(_ZAB%+D
} ;cz|ss=
Ox'/`Mppw
privatestaticboolean hasPrePage(int currentPage){ Ch%m
return currentPage == 1 ? false : true; -O!Zxg5x
} y>|{YWbp?
\qR %%S
privatestaticboolean hasNextPage(int currentPage, ADk8{L{UU
H0R&2#YD
int totalPage){ aKJQm'9Ks
return currentPage == totalPage || totalPage == R%
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0 ? false : true; 3LTcEd
} *"r~-&IL
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a~!G%})'a
} -yg?V2
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上面的这两个对象与具体的业务逻辑无关,可以独立和抽象。 ee#):
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面对一个具体的业务逻辑:分页查询出User,每页10个结果。具体 ?8mlZ
X9C
WJ9cZL
做法如下: {]]|5
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1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 -TOI c%
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的信息,和一个结果集List: g}U3y'
java代码: la?Wnw
t/PlcV_M"
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/*Created on 2005-6-13*/ d/e|'MPX
package com.adt.bo; LJTQaItdqJ
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import java.util.List; )&<=.q
w7n373y%
import org.flyware.util.page.Page; y tf b$;|
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/** RTu4@7XP
* @author Joa Wt9Q;hK
*/ Q9&kJ%Mo
publicclass Result { cFF*Z=L_
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private Page page; q;wLa#4)J
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private List content; k%op>
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/** =?(~aV
* The default constructor &h,5:u
*/ ,xT?mt}P
public Result(){ A[YpcG'9
super(); PSmfiaThwo
} 56Z\-=KAU
)*d W=r/$V
/** sfVf@0g
* The constructor using fields }Y17*zp%
* xyE1Gw`V
* @param page L~^*u_U]
* @param content M-uMZQe
*/ lRP1&FH0
public Result(Page page, List content){ $8BE[u|H2
this.page = page; U`x bPQ
this.content = content;
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} 1Fi86
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/** Sm2>'C
* @return Returns the content. 8Z2.`(3c[
*/ l**;k+hw
publicList getContent(){ \ M/6m^zS
return content; jUqy8q&
} ?QDWuPhN
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/** D=)f
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* @return Returns the page. T/P7F\R
*/ d'9:$!oz
public Page getPage(){ 9><mp]E4
return page; e[t<<u3"
} 41 vL"P
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k 2%S`/:
/** G 8Y+w
* @param content cxYfZ4++m
* The content to set. ]> Y/r-!
*/ L {ymI)Y^
public void setContent(List content){ XO
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this.content = content; #m8sK(#lo
} bO/*2oau
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/** &(xUhX T
* @param page r++i=SQax
* The page to set. XL}<1-}
*/ L6i|:D32p
publicvoid setPage(Page page){ Cv=GZGn-
this.page = page; !
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} e^$j5jV
} H%z@h~s>
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qU[O1bN
2. 编写业务逻辑接口,并实现它(UserManager, }o9Aa0$*$
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UserManagerImpl) (5uJZ!m
java代码: xnq><4
=<<3Pkv7@
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/*Created on 2005-7-15*/ r[Zq3
package com.adt.service; q?~Rnv
3#<*k>1G?
import net.sf.hibernate.HibernateException; z4}
%TT@^
%TK&)Q% h5
import org.flyware.util.page.Page; "6I[4U"@
zb2K;%Qs+f
import com.adt.bo.Result; g*]E>SQ=
a`Z{
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/** Z-|li}lDr
* @author Joa iG[?
]]
*/ }BN\/;<A
publicinterface UserManager { F$hZRZ
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public Result listUser(Page page)throws N5q725zJ
ZcZ;$*
HibernateException; j.QHkI1.
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} "jZm0U$,*
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=%h~/,
nN ~GP"}
java代码: [a8+(
}#aKFcvg
>x'bZ]gm
/*Created on 2005-7-15*/ =[(1my7
package com.adt.service.impl; mTEVFm
=&0U`P$`
import java.util.List; U4wpjHg
i;lE5
import net.sf.hibernate.HibernateException; &jJckT
=FBIrw{w
import org.flyware.util.page.Page; 6f}e+ 80
import org.flyware.util.page.PageUtil; \X@IkL$r
56s*A*z$
;
import com.adt.bo.Result; -fux2?8M
import com.adt.dao.UserDAO; dokuyiN\
import com.adt.exception.ObjectNotFoundException; Uh+jt,RB`
import com.adt.service.UserManager; zeTszT)
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/** IH3FK!>6
* @author Joa <-|SIF
*/ `)tK^[,<W
publicclass UserManagerImpl implements UserManager { g[!Cj,
gNa#|
private UserDAO userDAO;
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/** %\yK5V5
* @param userDAO The userDAO to set. 0QR.
*/ Jn,w)Els
publicvoid setUserDAO(UserDAO userDAO){ xzK>Xi?
this.userDAO = userDAO; W#45a.v
} !3KPwI,
kukaim>K
/* (non-Javadoc) d8.ajeN]o
* @see com.adt.service.UserManager#listUser +{xG<Wkltz
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(org.flyware.util.page.Page) b]dxlj}
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*/ s,
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public Result listUser(Page page)throws p#M!S2&z
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HibernateException, ObjectNotFoundException { B&nw#saz.
int totalRecords = userDAO.getUserCount(); v@,XinB[
if(totalRecords == 0) N<bD
throw new ObjectNotFoundException n1)'cS5}
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("userNotExist"); dP3VJ3+
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page = PageUtil.createPage(page, totalRecords); t~~r-V":
List users = userDAO.getUserByPage(page); kGj]i@(PA4
returnnew Result(page, users); o*)@oU
} drX4$Kdf]
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} r!M#7FDs(
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h*l4Y!7
其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 g _x\T+=
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询,接下来编写UserDAO的代码: *cy.*@d
3. UserDAO 和 UserDAOImpl: .9I_NG
java代码:
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q @*UUj@
/*Created on 2005-7-15*/ eHROBxH&
package com.adt.dao; WnO DDr
+cw{aI`a8
import java.util.List; U;>B7X;`E4
>";%2u1
import org.flyware.util.page.Page; "DzGBu\
&}|0CR.(
import net.sf.hibernate.HibernateException; (>r|j4$
@d
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/** Wb'*lT0=
* @author Joa 1YFAr}M
*/ x/[8Wi,yB
publicinterface UserDAO extends BaseDAO { K5+!(5V~
%)dI2 J^Xf
publicList getUserByName(String name)throws AYYRxhv_,
.^GFy
HibernateException; <M`-`v6H
"j
+v,js
publicint getUserCount()throws HibernateException; Q+/R
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=G[H,;W
publicList getUserByPage(Page page)throws [5-!d!a|st
&?v#| qIh
HibernateException; {z-NlH
}7&\eV{qU
} 4Z],+?.[
H7J`]nr6
$TFTIk*uU
lWIv(%/@
@#1cx
java代码: zAu}hVcW
7ia"u+Y
]P
JH'=
/*Created on 2005-7-15*/ I_K[!4~Kn
package com.adt.dao.impl; fyGCfM
*;Ak5.du
import java.util.List; }1@n(#|c
[6tR&D#K
import org.flyware.util.page.Page; G@;Nz i89
S q.9-h%5
import net.sf.hibernate.HibernateException; *j/uihY
import net.sf.hibernate.Query; M44_us
s%FP6u7[i
import com.adt.dao.UserDAO; E]1\iV
$To4dJb
/** =tLU]
* @author Joa %{=4Fa(Jux
*/ b,zR5R^D;
public class UserDAOImpl extends BaseDAOHibernateImpl ;;D%
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implements UserDAO { 2c!h2$w
f*UBigk
/* (non-Javadoc) S_`W@cp[
* @see com.adt.dao.UserDAO#getUserByName 'o7R/`4KR
`9]P/J^
(java.lang.String) 1g+LF[*-~
*/ (tgEa{rPAP
publicList getUserByName(String name)throws (}VuiNY<