Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 "n<rP 3y
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 2T3TD%
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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 P:~Xaz\F
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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 Z|78>0SAt
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。 !T+jb\O_
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分页支持类: Mn)>G36(
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java代码: iJ8 5okv'
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package com.javaeye.common.util; ~*R:UTBtw
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import java.util.List; (~59}lu~
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publicclass PaginationSupport { Z>897>
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publicfinalstaticint PAGESIZE = 30; 7!-3jU@m
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privateint pageSize = PAGESIZE; %:jVx
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privateList items; +&AKDVmx
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privateint totalCount; #=}dv8
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privateint[] indexes = newint[0]; sObH#/l`
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privateint startIndex = 0; KOQiX?'
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public PaginationSupport(List items, int R1!F mZW8
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totalCount){ "7w~0?}
setPageSize(PAGESIZE); jwP}{mi*
setTotalCount(totalCount); ;q=0NtCS=4
setItems(items); ^[UWG^d
setStartIndex(0); $q"/q*ys
} "ITC P<+
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public PaginationSupport(List items, int |3Fo4K%+
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totalCount, int startIndex){ VXE85
setPageSize(PAGESIZE); !b !C+ \v
setTotalCount(totalCount); qcNu9Ih
setItems(items); Ou26QoT9XI
setStartIndex(startIndex); Gky
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} L9lN AiOH
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public PaginationSupport(List items, int )+Nm@+B
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totalCount, int pageSize, int startIndex){ 9+z5$
setPageSize(pageSize); S]Y3nI
setTotalCount(totalCount); TT85G
setItems(items); %VV\biO]
setStartIndex(startIndex); Vxr_2Kra
} 4$5d*7
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publicList getItems(){ 2
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return items; (31ia"i%
} '}nH\?(
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publicvoid setItems(List items){ *Ce8(
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this.items = items; gY\g+df-
} yN'<iTh
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publicint getPageSize(){ cWNZ +Q8Y
return pageSize; ]JQ+*ZYUE
} [lU0TDq
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publicvoid setPageSize(int pageSize){ NWSm
this.pageSize = pageSize; )aV\=a |A
} "mbjS(-eg
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publicint getTotalCount(){ *btLd7c%
return totalCount; !=)R+g6b
} $uPM.mPFE
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publicvoid setTotalCount(int totalCount){ ;s^br17z~
if(totalCount > 0){ d`XC._%^J
this.totalCount = totalCount; ?{)s dJe
int count = totalCount / /Zzb7bHLK
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pageSize; RJYB=y8l
if(totalCount % pageSize > 0) P"Scs$NOU?
count++; zeC@!,lH
indexes = newint[count]; Z(|@C(IL0\
for(int i = 0; i < count; i++){ mQbpv'N
indexes = pageSize * a/4!zT
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i; Bql5=p
} ]j4Nl?5*x
}else{ K)D5%?D
this.totalCount = 0; t PJW|wo
} $!'S7;*uW
} `4xnM`:L"
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publicint[] getIndexes(){ bu2@~
return indexes; Q5ZZ4`K!
} I[x+7Y0k9
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publicvoid setIndexes(int[] indexes){ -T,/S^
this.indexes = indexes; Y%OJ3B(n|
} 5qe6/E@
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publicint getStartIndex(){ %(P\"hE'
return startIndex; L~Hl?bK
} Y:x,pPyl
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publicvoid setStartIndex(int startIndex){ ytmFe !
if(totalCount <= 0) !1X^lFf;~
this.startIndex = 0; 5PcN$r"P
elseif(startIndex >= totalCount) KTmduf7DL
this.startIndex = indexes Ar;uq7c,G
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[indexes.length - 1]; Yn~N;VUA
elseif(startIndex < 0) o 94]:$=~
this.startIndex = 0; Vgj&hdbd
else{ ,GU|3
this.startIndex = indexes un&Z'
.
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[startIndex / pageSize]; 'XbrO|%
} >u-6,[(5X*
} I6.!0.G
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publicint getNextIndex(){ 7\T~KYb?
int nextIndex = getStartIndex() + .5tE, (<?
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pageSize; q
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if(nextIndex >= totalCount) mY'c<>6t
return getStartIndex(); aFbIJm=!
else 3IlflXb
return nextIndex; q^I/
} h1A/:/_M6
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publicint getPreviousIndex(){ $:4*?8K2
int previousIndex = getStartIndex() - 2#XYR>[
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pageSize; %XQ!>BeE
if(previousIndex < 0) d3IMQ_k
return0; w nPg ).
else liuw!
return previousIndex; ~{xm(p
} Dp8`O4YC
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} J%
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#
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抽象业务类 82>90e(CH]
java代码: iPuX
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/** Ofm?`SE*|
* Created on 2005-7-12 xh90qm
*/ |Y9mre.Y;
package com.javaeye.common.business;
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import java.io.Serializable; Ld9YbL:
import java.util.List; $*k9e ^{S
!Z}d^$
import org.hibernate.Criteria; CI}zu;4|
import org.hibernate.HibernateException; 4H]~ ]?F&
import org.hibernate.Session; lG>,&(
import org.hibernate.criterion.DetachedCriteria; bzC|aUGM
import org.hibernate.criterion.Projections; 'LyEdlC]
import tx9;8K3
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org.springframework.orm.hibernate3.HibernateCallback; 7C::%OF~7
import G%q^8#
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org.springframework.orm.hibernate3.support.HibernateDaoS <aPbKDF~V
nRSiW*;R
upport; kLfk2A;' i
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import com.javaeye.common.util.PaginationSupport; kgl7l?|O
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public abstract class AbstractManager extends
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HibernateDaoSupport { Pc:5*H
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privateboolean cacheQueries = false; b<]Ae!I'
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privateString queryCacheRegion; m8:9Uv
*pP&$!bH%
publicvoid setCacheQueries(boolean 3%0ShMFP@
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cacheQueries){ iLIv<VK/d
this.cacheQueries = cacheQueries; cN&]JS,
} P2t{il
{: H&2iF
publicvoid setQueryCacheRegion(String ~rl,Hr3Zo
\8}!aTC
queryCacheRegion){ j]X$7
this.queryCacheRegion = !Y95e'f.x
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queryCacheRegion; b rpsZU
} {pR4+g
~ 7^#.
publicvoid save(finalObject entity){ xaw)iC[gI{
getHibernateTemplate().save(entity); |Vj@;+/j
} -H+<81"B#
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publicvoid persist(finalObject entity){ p "Cxe
getHibernateTemplate().save(entity); %%c1@2G<
} 0LW|5BVbIO
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publicvoid update(finalObject entity){ v*[oe
getHibernateTemplate().update(entity); -KA Y
} ^fq^s T.$
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publicvoid delete(finalObject entity){ x,rK4L7U
getHibernateTemplate().delete(entity); t)__J\xF
} -L6YLe%w
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publicObject load(finalClass entity, D_D76
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finalSerializable id){ \YZ7
return getHibernateTemplate().load TilCP"(6D
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(entity, id); 6dlV:f_\y
} l =X6m(
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publicObject get(finalClass entity, 6VQe?oh
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finalSerializable id){ M}Obvl
return getHibernateTemplate().get E/:mO~1< c
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(entity, id); +f"q^R IU
} xro%AM
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publicList findAll(finalClass entity){ h|Ah\P?o
return getHibernateTemplate().find("from vvwQ/iJO4Q
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" + entity.getName()); 7E]qP
5
} \96aHOk<
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publicList findByNamedQuery(finalString +v{g'
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namedQuery){ >2BWie?T
return getHibernateTemplate H)rE-7(f!
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().findByNamedQuery(namedQuery); /y-eVu6
} fP>~ @^
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publicList findByNamedQuery(finalString query, vP @\"
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finalObject parameter){ ?igA+(.
return getHibernateTemplate p*5QV
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().findByNamedQuery(query, parameter); VoG:3qN
} T?e(m
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publicList findByNamedQuery(finalString query, ?qt .+2:
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finalObject[] parameters){ VNT*@^O_=
return getHibernateTemplate b
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().findByNamedQuery(query, parameters); !3;KC"o
} jM5w<T-2/
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publicList find(finalString query){ +zL|j/q ?
return getHibernateTemplate().find duq(K9S
s%/x3anz=
(query); L}Rsg'U
} {Lg]chJq?
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publicList find(finalString query, finalObject r>,s-T!7
f =T-4Of
parameter){ I(Gl8F\c~
return getHibernateTemplate().find Y9r##r+
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(query, parameter); h6;vOd~%
} l#|wF$J
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public PaginationSupport findPageByCriteria pybE0]
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(final DetachedCriteria detachedCriteria){ !4vepa}Y
return findPageByCriteria n]x%xnt
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); wi-F@})f#
} >`=9So_J
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public PaginationSupport findPageByCriteria $,
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(final DetachedCriteria detachedCriteria, finalint >)*0lfxTZ
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startIndex){ M"s+k
return findPageByCriteria >XJUj4B|X
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(detachedCriteria, PaginationSupport.PAGESIZE, H~<w*[uT
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startIndex); yB5JvD ?
} 4'#?"I
! z6T_;s
public PaginationSupport findPageByCriteria 9$s~ `z)
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(final DetachedCriteria detachedCriteria, finalint 77H"=
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pageSize, rGmxK|R
finalint startIndex){ z]HaE|j}S
return(PaginationSupport) dGG 8k&
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getHibernateTemplate().execute(new HibernateCallback(){ t|?eNKVV9'
publicObject doInHibernate V:
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(Session session)throws HibernateException { FSD~Q&9&
Criteria criteria = F10TvJ
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detachedCriteria.getExecutableCriteria(session); _V,bvHWlM
int totalCount = N1yx|g:
$!7$0WbC
((Integer) criteria.setProjection(Projections.rowCount C$4!|Wg3
@MKf$O4K
()).uniqueResult()).intValue(); a)QSq<2*
criteria.setProjection 8 -YC#&
@kW RI* m
(null); iI Dun Ih
List items = Oh5aJ)"D
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criteria.setFirstResult(startIndex).setMaxResults y`\rb<AZ*t
j1O_Az|3
(pageSize).list(); "0aJE1)p:
PaginationSupport ps = oH;9s-Be
r!;wKO
new PaginationSupport(items, totalCount, pageSize, vLIaTr gz
9>r@wK'Pn
startIndex); SNc $!
return ps; _6.Y3+7I
} |_mN:(3
}, true); Pos(`ys;
} @tlWyUju
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public List findAllByCriteria(final Xbu P_U'
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DetachedCriteria detachedCriteria){ s"~3.J
return(List) getHibernateTemplate |3G;Rh9w,
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().execute(new HibernateCallback(){ #z =$*\u
publicObject doInHibernate ]cM,m2^2
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(Session session)throws HibernateException { [LM9^*sG2V
Criteria criteria = 1#KBf[0
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detachedCriteria.getExecutableCriteria(session); C."\ a_p
return criteria.list(); ;:
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} W>(w&k]%B
}, true); k
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} dy]ZS<Hz8G
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public int getCountByCriteria(final TTGWOC
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DetachedCriteria detachedCriteria){ 20/P:;
Integer count = (Integer) <>H^:iqn
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getHibernateTemplate().execute(new HibernateCallback(){ Y=D\
publicObject doInHibernate I ZBY*kr
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(Session session)throws HibernateException { NUFW
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Criteria criteria = `_SV1|=="8
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detachedCriteria.getExecutableCriteria(session); $"ACg!=M
return ;tC$O~X
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criteria.setProjection(Projections.rowCount :,V&P_
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()).uniqueResult(); %+oqAYm+s
} fR]KXfZ
}, true); KNjU!Z/4
return count.intValue(); A<+1:@0
} 5zz">-Q !
} 9XhcA
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用户在web层构造查询条件detachedCriteria,和可选的 kK:U+`+
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 zUq(bD
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PaginationSupport的实例ps。 0:JNkXZ:
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ps.getItems()得到已分页好的结果集 {E0\mZ2
ps.getIndexes()得到分页索引的数组 w?Pex]i{
ps.getTotalCount()得到总结果数 .DM-&P
ps.getStartIndex()当前分页索引 \h?6/@3ob
ps.getNextIndex()下一页索引 @VQ<X4Za
ps.getPreviousIndex()上一页索引 dDa&:L
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 i,t!17M:
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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 jig3M N
bd H+M?k
一下代码重构了。 I%NeCd
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我把原本我的做法也提供出来供大家讨论吧: )Y6\"-M[
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首先,为了实现分页查询,我封装了一个Page类: X#HH7V>
java代码: nuVux5:
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/*Created on 2005-4-14*/ zB/VS_^^W:
package org.flyware.util.page; o]]sm}3N
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/** \01 kK)
* @author Joa ?Qx4Z3n
* O*.n;_&
*/ #M4LG; B
publicclass Page { 5~ZzQG
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/** imply if the page has previous page */ ;NE4G;px4<
privateboolean hasPrePage; 5A<}*T
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/** imply if the page has next page */ Uf
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privateboolean hasNextPage; qoZ)"M
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/** the number of every page */ zszmG^W{
privateint everyPage; mX!*|$bs
sWB@'P:x
/** the total page number */ ([^#.x)hz
privateint totalPage; I@\D
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w=3
j'y{f
/** the number of current page */ y0-UO+;
privateint currentPage; RR'sW@
#c":y5:
/** the begin index of the records by the current v+}${h9
:LlZ#V2
query */ A}}dc:$C
privateint beginIndex; 6nREuT'k
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/** The default constructor */ O /:FY1
public Page(){ \w"~DuA
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} .;qh>Gt
R$66F>Jz^
/** construct the page by everyPage xR8.1T?8
* @param everyPage c{ +bY.J
* */ y0ObcP.MA
public Page(int everyPage){ @WJ\W `P
this.everyPage = everyPage; a>rDJw:
} ?#fm-5WIi
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/** The whole constructor */ 7\[fjCg\w
public Page(boolean hasPrePage, boolean hasNextPage, 3o0ZS^#eB
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YY u
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int everyPage, int totalPage, M<*WC{
int currentPage, int beginIndex){ OZd
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this.hasPrePage = hasPrePage; |i#06jIq
this.hasNextPage = hasNextPage; =FI[/"476
this.everyPage = everyPage; Jgg< u#
this.totalPage = totalPage; l5~O}`gfh
this.currentPage = currentPage; mlCg&fnDB
this.beginIndex = beginIndex; 1e7I2g
} BFg&@7.X
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/** >\3\&[#"
* @return Ok|Dh;1_
* Returns the beginIndex. VIN0kRQ#
*/ &%GAPs%
publicint getBeginIndex(){ iK+Vla`}
return beginIndex; Jp%5qBS^
} 8UXRM :Z"
MB $aN':
/** <VQ)}HW;k
* @param beginIndex 1r_V$o$
* The beginIndex to set. ;ISe@yR;
*/ k<CbI
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publicvoid setBeginIndex(int beginIndex){ mF|KjX~s
this.beginIndex = beginIndex; A0U9,M
} 2ZEGE+0
R&&&RI3{
/** jWV}Ua
* @return yP>025o't
* Returns the currentPage. T:Ee6I 3l
*/ H0sTL#/L \
publicint getCurrentPage(){ E`V\/`5D
return currentPage; Ej
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} -zn_d]NV
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/** ?w'86^_z
* @param currentPage xy4+
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* The currentPage to set. Hk@Gkx_
*/ K1BBCe
publicvoid setCurrentPage(int currentPage){ ciiI{T[Z
this.currentPage = currentPage; '21gUYm
} V>,=%r4f
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/** 9=3DYCk/
* @return hV0fkQ.|
* Returns the everyPage. EG|dN(qh
*/ '6WS<@%}
publicint getEveryPage(){ t|i<}2
return everyPage; c.b| RM0;
} **kix
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/** FKz5,PeL
* @param everyPage wT6zeEV~*
* The everyPage to set. pr7lm5
*/ #vxq|$e
publicvoid setEveryPage(int everyPage){ m%apGp'=1
this.everyPage = everyPage; KR%WBvv
} Qni`k)4
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/** l
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* @return &KAe+~aPm
* Returns the hasNextPage. ZV+tHgzlv5
*/
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publicboolean getHasNextPage(){ ~IjID
return hasNextPage; _p+E(i 9
} 5Gy#$'kdf
"t(_r@qU/
/** f$:SacF
* @param hasNextPage r{9fm,
* The hasNextPage to set. X!^|Tass
*/ 9J?s:"j
publicvoid setHasNextPage(boolean hasNextPage){ -~lq <M
this.hasNextPage = hasNextPage; \3^ue0
} 1ONkmVtL
gCC7L(1
/** t(-,mw
* @return zU+q03l8Ur
* Returns the hasPrePage. M3O !jN~
*/ 2M'dTXz
publicboolean getHasPrePage(){ *wj5( B<y
return hasPrePage; 16~E
} z]+L=+,,
rf:H$\yw
/** HOFxOBV
* @param hasPrePage kDWEgnXK,v
* The hasPrePage to set. 7#%Pry
*/ LlO8]b!P-^
publicvoid setHasPrePage(boolean hasPrePage){ =urGs`\
this.hasPrePage = hasPrePage; 4}v|^_x-i
} ;-kDJi
BR@m*JGajz
/** URrx7F98
* @return Returns the totalPage. -|KZOea
* -Z$u[L [c
*/ SnQT1U%
publicint getTotalPage(){ QO(F%&v++
return totalPage; A8*zB=C
} S* O .
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v#/Gxk9eX
/** @|c])
* @param totalPage QR'# ]k;>%
* The totalPage to set. w"s@q$}]8M
*/ pF8 #H~
publicvoid setTotalPage(int totalPage){ \"nut7";2
this.totalPage = totalPage; o?hr>b
} p ZTrh&I]
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} .E}lAd.Mn
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T TN!$?G3
9"]#.A^Q*
上面的这个Page类对象只是一个完整的Page描述,接下来我写了一 ucx02^uA
}}QR'
个PageUtil,负责对Page对象进行构造: 3>@VPMi
java代码: }\?9Prsd
-;L'Jb>s76
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/*Created on 2005-4-14*/ WJnGF3G>
package org.flyware.util.page; ebQgk
Y=
:1>?:3,`
import org.apache.commons.logging.Log; @
gWd
import org.apache.commons.logging.LogFactory; ngl +`|u
d9M[]{
/** c:Nm!+5_(
* @author Joa f(Of+>
* '1gfXC
*/ N8dxgh!,
publicclass PageUtil { ?l^Xauk4Pj
Pp tuXq%U
privatestaticfinal Log logger = LogFactory.getLog Jq'8"
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(PageUtil.class); ~!
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/** BA]$Fi.Mw
* Use the origin page to create a new page ,dCEy+
* @param page bT^dtEr[
* @param totalRecords S*V}1</L
* @return ]$[sfPKA
*/ o6k#neB>=.
publicstatic Page createPage(Page page, int $zjdCg<
5?^L))
totalRecords){ x1.S+:
return createPage(page.getEveryPage(), /q]rA
f|~ {j(.v
page.getCurrentPage(), totalRecords); T"_'sSI>tF
} 4?'vP '
{}$7B p
/** EyE#x_A
* the basic page utils not including exception RDp
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handler *{DTxEy
* @param everyPage ZP<<cyY
* @param currentPage .+/d08]
* @param totalRecords d}[cX9U/
* @return page v\Uk?V5T
*/ 4V')FGB$
publicstatic Page createPage(int everyPage, int Dp
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j )6
currentPage, int totalRecords){ mLxgvp
everyPage = getEveryPage(everyPage); ZNX38<3h
currentPage = getCurrentPage(currentPage); g4[VgmhJ
int beginIndex = getBeginIndex(everyPage,
J, 9NVw$
##7y|AwK
currentPage); GkIY2PD
int totalPage = getTotalPage(everyPage, }aVZ\PDg
3 !@
totalRecords); "d_wu#fO)
boolean hasNextPage = hasNextPage(currentPage, YNEwX$)M,B
k2U*dn"9U
totalPage); ?BnU0R_r]
boolean hasPrePage = hasPrePage(currentPage); (j&:
\!-BR0+y;
returnnew Page(hasPrePage, hasNextPage, "+F'WCJ-(*
everyPage, totalPage, y>P+"Z.K%}
currentPage, "]+g5G
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beginIndex); WEimJrAn
} ^Co$X+
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privatestaticint getEveryPage(int everyPage){ 7MKX`S
return everyPage == 0 ? 10 : everyPage; 1`&`y%c?B
} h xO}'`:
bO=|utpk
privatestaticint getCurrentPage(int currentPage){ h+FM?ct6}
return currentPage == 0 ? 1 : currentPage; &0F' Ca
} `@/)S^jBau
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privatestaticint getBeginIndex(int everyPage, int 1UP=(8j/
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currentPage){ a#YK1n[!
return(currentPage - 1) * everyPage; zfeT>S+
} !@ ^6/=
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privatestaticint getTotalPage(int everyPage, int K3yQ0k
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totalRecords){ =&WIa#!=
int totalPage = 0; zw/AZLS
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if(totalRecords % everyPage == 0) 9zu;OK%
totalPage = totalRecords / everyPage; )/T[Cnx.Nc
else pH1!6X
totalPage = totalRecords / everyPage + 1 ; D0D=;k
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return totalPage; U lYFloZ
} qb>41j9_t
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privatestaticboolean hasPrePage(int currentPage){ jf~](TK
return currentPage == 1 ? false : true; G,u=ngZ]
} s,HbW%s
XcVN{6-z
privatestaticboolean hasNextPage(int currentPage, qO#3{kW
B>,eHXW
int totalPage){ EuK}L[Kl
return currentPage == totalPage || totalPage ==
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/eF@a!
0 ? false : true; S
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} ;M:AcQZ|_
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o
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} `q^#u
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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。 o*cu-j3
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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 T
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做法如下: |&; ^?M
1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 QL?_FwZL
z
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的信息,和一个结果集List: 0HzqU31%l@
java代码: -'! J?~
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/*Created on 2005-6-13*/ o?`FjZ6;x
package com.adt.bo; J]F&4O
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import java.util.List; uzYB`H<
*_(X$qfoW
import org.flyware.util.page.Page; Nu5|tf9%A
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/** )l3Uf&v^f
* @author Joa 3_(_yEKx
*/ )GD7rsC`<
publicclass Result { &d_^k.%y
WR;1
private Page page; HK;NR.D
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private List content; WyN
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/** Z(mUU]
* The default constructor \TV
*/ Rs %`6et}\
public Result(){ LgqQr6y"
super(); hlzB
cz*
} ]3KeAJ
}A)\bffH
/** 3BFOZV+
* The constructor using fields 9/ <3mF@E
* Q]ersA8 V>
* @param page |Y9>kXM l
* @param content i'IT,jz!
*/ slQn
public Result(Page page, List content){ c_J9CKqc
this.page = page; u` pTFy
this.content = content; VY?9|};f
} c+Q'4E0|
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/** HW@wia
* @return Returns the content. eg0_ <
*/ vObZ|>.J~O
publicList getContent(){ MmF&jd-=
return content; w#A)B<Y/"
} [!'+}
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/** b^o4Q[
* @return Returns the page. b8mH.g&l
*/ PDNl]?
public Page getPage(){ R9J!}az'
return page; ZpTDM1ro
} o! a,r3
':*H#}Br-#
/** i8]EIXbMX
* @param content F/5&:e?( )
* The content to set. :eN&wQ5q
*/ tsXKhS;/w
public void setContent(List content){ +
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this.content = content; $:9t(X)H
} c*bvZC^6
je] DR~
/** '&IGdB I
* @param page I"Oq< _
* The page to set. qZ1'uln=C-
*/ )6"}M;v
publicvoid setPage(Page page){ K-RmB4WI
this.page = page; Et=Pr+Q{c
} .#[ 9q-
} N} EKV
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2. 编写业务逻辑接口,并实现它(UserManager, K<S3gb?0
n`Q@<op
UserManagerImpl) K;F1'5+=D
java代码: 01cBAu
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/*Created on 2005-7-15*/ >eJ<-3L;
package com.adt.service; 1J?v\S$ma`
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import net.sf.hibernate.HibernateException; .9~j%]q
,H=k5WA4m
import org.flyware.util.page.Page; !KHgHKEW^
uibmQ|AQ
import com.adt.bo.Result; XKp&GE@Y
8^7Oc,:~
/** ug3\K83aj/
* @author Joa 09kR2(nsW/
*/ ww2mL
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publicinterface UserManager { ztp|FUi
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public Result listUser(Page page)throws '|8dt "C
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HibernateException; MN?aPpr>
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(\7
} [F-R*}&x
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java代码: ^rWg:fb
atL<mhRz
BP/nK.
/*Created on 2005-7-15*/ g5V \R*{
package com.adt.service.impl; &Ok1j0~~
#asg5 }
import java.util.List; qC`}vr|Z
C- .;m
import net.sf.hibernate.HibernateException; F#Lo^ 8
br I;}m
import org.flyware.util.page.Page; E&U_1D9=L<
import org.flyware.util.page.PageUtil; >kXscbRL7
:i.@d?
import com.adt.bo.Result; L(y70T
import com.adt.dao.UserDAO; l=?e0d>O
import com.adt.exception.ObjectNotFoundException; (< +A w7
import com.adt.service.UserManager; (Pc>D';{S
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/** sz9W}&(j
* @author Joa cBxGGggB
*/ O<S.fr,
publicclass UserManagerImpl implements UserManager { #&Hi0..y
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private UserDAO userDAO; !"^Zr]Qt+\
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/** JR!-1tnc
* @param userDAO The userDAO to set. y:'Ns$+
*/ 1wFu3fh@
publicvoid setUserDAO(UserDAO userDAO){ 5B=uvp|Y
this.userDAO = userDAO;
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} s6H.Q$3L
a?[[F{X9^
/* (non-Javadoc) Iz0$T.T
* @see com.adt.service.UserManager#listUser 8(1*,CJQg
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(org.flyware.util.page.Page) $1yy;IyR
*/ G6p gG+w
public Result listUser(Page page)throws {4J.
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HibernateException, ObjectNotFoundException { VbX P7bZ
int totalRecords = userDAO.getUserCount(); ]Lv3XMa
if(totalRecords == 0) o[Ffa#sE
throw new ObjectNotFoundException |A&;m}(Mt
8$IKQNS
("userNotExist"); H/o_? qK
page = PageUtil.createPage(page, totalRecords); >@vu;j\*E5
List users = userDAO.getUserByPage(page); b-u@?G|<
returnnew Result(page, users); 9nFL70
} Sn nfU
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} gFR}WBl/
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其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 X4%uY
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询,接下来编写UserDAO的代码: 8iIp[9~=
3. UserDAO 和 UserDAOImpl: /.]u%;%r[
java代码:
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ajSB3}PN
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/*Created on 2005-7-15*/ &gCGc?/R#
package com.adt.dao; y3~`qq
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import java.util.List; Ark]>4x>
qPDNDkjDD
import org.flyware.util.page.Page; Xb"i/gfxt
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import net.sf.hibernate.HibernateException; p/Pus;*s
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/** `2f/4]fY
* @author Joa Z9vMz3^N
*/ -06G.;W\^
publicinterface UserDAO extends BaseDAO { Bsa;,
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publicList getUserByName(String name)throws ~4fE`-O
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HibernateException; iT'doF
bdL= ?KS
publicint getUserCount()throws HibernateException; VhO+nvd*W
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publicList getUserByPage(Page page)throws d6n_Hpxw^
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HibernateException; /EjXyrn2
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} }m+Q(2
#D9.A7fCc5
'g%:/lwA
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#Th)^Is
java代码: .i*oZ'[X
y8YsS4E^Q
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