Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 v_KO xV:<`
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 $+j1^
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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 4/
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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 Fk=SkSky
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分页支持类: Kx9u|fp5
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java代码: *JK0X
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package com.javaeye.common.util; ]bds~OY5 U
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import java.util.List; fkI 5~Y|
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publicclass PaginationSupport { )tG. 9"<
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publicfinalstaticint PAGESIZE = 30; jPSVVOG
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privateint pageSize = PAGESIZE; {Zgd
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privateList items; $w(RJ/
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privateint totalCount; ((ebSu2-?$
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privateint[] indexes = newint[0]; ZR1U&<0c@
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privateint startIndex = 0; y#Dh)~|k
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public PaginationSupport(List items, int ||hQ*X<m>
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totalCount){ i q`}c
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setPageSize(PAGESIZE); "pkdZ
setTotalCount(totalCount); a``|sn9
setItems(items); }AS?q?4?
setStartIndex(0); {+9RJmZg
} )Qb,zS6
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public PaginationSupport(List items, int #*bmwb*i
y#'hOSR2
totalCount, int startIndex){ yzN[%/
setPageSize(PAGESIZE); 1AAyzAP9`
setTotalCount(totalCount); i#-v4g
setItems(items); l cl|o3yQ
setStartIndex(startIndex); hDxq9EF
} 9gg{i6
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public PaginationSupport(List items, int \Kf\%Q
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totalCount, int pageSize, int startIndex){ JP4DV=}L
setPageSize(pageSize); 6]v}
setTotalCount(totalCount); ~5,^CTAM
setItems(items); MZGhN
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setStartIndex(startIndex); 3}nk9S:jr
} 0O"W0s"T#
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publicList getItems(){ X,Na4~JO(
return items; {KgA
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} ]FCP|Jz
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publicvoid setItems(List items){ b,Wm]N
this.items = items; =zFROB\
} 6qT@M0)i
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publicint getPageSize(){ r *K
return pageSize; !JA;0[;l=
} )R7Sh51P
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publicvoid setPageSize(int pageSize){ ~&RTLr#\*M
this.pageSize = pageSize; -'Z Gc8)
} .I:rb~&
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publicint getTotalCount(){ AYnPxiW|
return totalCount; wqo:gW_
} m?(8T|i
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publicvoid setTotalCount(int totalCount){ [NSslVr
if(totalCount > 0){ .?{no}u.
this.totalCount = totalCount; f30J8n"k
int count = totalCount / ~A>fB2.pM
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pageSize; j4IVIj@$`
if(totalCount % pageSize > 0) =e6pv#
count++; -$8ew+
indexes = newint[count]; vh\i ^
for(int i = 0; i < count; i++){ Ic(qA{SM
indexes = pageSize * `O6#-<>
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i; }StzhV{GS
} akvi^]x
}else{ m]jA(
this.totalCount = 0; EL~$7 J
} ?L }>9$"
} .\caRb[
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publicint[] getIndexes(){ JX0M3|I=
return indexes; ox&5}&\
} S1$^ _S
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publicvoid setIndexes(int[] indexes){ %"`p&aE:
this.indexes = indexes; jt}Re,
} .{ v$;g
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publicint getStartIndex(){ k3bQ32()
return startIndex; 6!_Wo\_%
} 5&8E{YXr
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publicvoid setStartIndex(int startIndex){ 8C{&i5kj\E
if(totalCount <= 0) eB~\~@
this.startIndex = 0; .,u>WIUxj
elseif(startIndex >= totalCount) OQumAj
this.startIndex = indexes 5az%yS
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[indexes.length - 1]; )|*Qs${tF
elseif(startIndex < 0) d7^
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this.startIndex = 0; v_zt$bf{Y
else{ *5Zow 3
this.startIndex = indexes x;[ . ZzQ
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[startIndex / pageSize]; d.+*o
} 4.,EKw3
} d[t0K]
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publicint getNextIndex(){ Q# hRnM
int nextIndex = getStartIndex() + d&^b=d FDu
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pageSize; 7RT{RE
if(nextIndex >= totalCount) lfAy$qP"}
return getStartIndex(); IRg2\Hq
else /!ElAL
return nextIndex; >7BP}5`.;
} 30HUY?'K
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publicint getPreviousIndex(){ ]\yB,
int previousIndex = getStartIndex() - cB,^?djJ3
CzV;{[?~;
pageSize; z#+WK|a
if(previousIndex < 0) \hX,z =
return0; 7(2}Vs!5
else Tu(:?
return previousIndex; z<eu=OD4t
} K#A&
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} +jE)kaV%
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抽象业务类 3X(^`lAf)
java代码: "\*)KH`C
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/** jN+`V)p
* Created on 2005-7-12 u[qy1M0
*/ x[t?hl=:
package com.javaeye.common.business; "22./vWV|i
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import java.io.Serializable; d_
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import java.util.List; '5aA+XP|
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import org.hibernate.Criteria; ?`TJ0("z"
import org.hibernate.HibernateException; 1le9YL1_g
import org.hibernate.Session; ZTTA??}Y
import org.hibernate.criterion.DetachedCriteria; q-t%spkl
import org.hibernate.criterion.Projections; @zS/J,:v}
import L~ax`i1:"
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org.springframework.orm.hibernate3.HibernateCallback; %# uw8V
import s>;"bzzq
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org.springframework.orm.hibernate3.support.HibernateDaoS Fe[6Y<x+:
sA6Hk B.
upport; ?e-rwaW
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import com.javaeye.common.util.PaginationSupport; ( &m1*
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public abstract class AbstractManager extends GYw/KT~$
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HibernateDaoSupport { pJg:afCg
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privateboolean cacheQueries = false; _3
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privateString queryCacheRegion; ZS:[ZehF
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publicvoid setCacheQueries(boolean 9>+>s ?IgK
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cacheQueries){ pjO
this.cacheQueries = cacheQueries; Db2#QQ
} ?Ho$fGz
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publicvoid setQueryCacheRegion(String h`fZ8|yw
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queryCacheRegion){ NTJ,U2
this.queryCacheRegion = S?t
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queryCacheRegion; TJ>YJD
} kk126?V]_
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publicvoid save(finalObject entity){ AkjoD7.*
getHibernateTemplate().save(entity); h1>.w
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} ,=!s;+lu{
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publicvoid persist(finalObject entity){ zX=%BL?
getHibernateTemplate().save(entity); :8n?G
} )FB<gCh7X
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publicvoid update(finalObject entity){ Iy5W/QK6
getHibernateTemplate().update(entity); ,S(_YS^m
} mp3 Dc
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publicvoid delete(finalObject entity){ a
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getHibernateTemplate().delete(entity); 'PMzm/;8st
} p"\-iY]
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publicObject load(finalClass entity, dFeGibI{
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*
finalSerializable id){ O'SxTwO
return getHibernateTemplate().load >y+j!)\
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(entity, id); yPbOiA*lHz
} HH!SqkwT
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publicObject get(finalClass entity, Rpcnpo
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finalSerializable id){ EI9Yv>7 d{
return getHibernateTemplate().get \l6mXIn=>
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(entity, id); j@Us7Q)A(
} nkk GJV!
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publicList findAll(finalClass entity){ jaThS!>v
return getHibernateTemplate().find("from t[%=[pJHW
QL(}k)dB
" + entity.getName()); :+DAzjwO<
} :?%_JM5U
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publicList findByNamedQuery(finalString b=Sl`&A
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namedQuery){ d@|j>Z
return getHibernateTemplate '9wD+'c=A
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().findByNamedQuery(namedQuery); D/{ Spw@
} =7P; /EV
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publicList findByNamedQuery(finalString query, b!37:V\#}
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finalObject parameter){ q33!X!br
return getHibernateTemplate r52,f%nlm
8&f"")m
().findByNamedQuery(query, parameter); Q;$/&Y*
} ZoC?9=k
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publicList findByNamedQuery(finalString query, q14A'XW
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finalObject[] parameters){ J2#=`|t"
return getHibernateTemplate 13{"sY:PT#
{&(bKQ
().findByNamedQuery(query, parameters); Ll&5#q
} +ACV,GG
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publicList find(finalString query){ e;}5~dSi
return getHibernateTemplate().find f4T-=` SO
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(query); S+OI?QS
} ")M.p_b[Z=
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publicList find(finalString query, finalObject !c`Q?aGV)
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parameter){ Y=rW.yK8
return getHibernateTemplate().find Js#c9l{{
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(query, parameter); M!6bf
} z8"=W,2
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public PaginationSupport findPageByCriteria kAk,:a;P
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(final DetachedCriteria detachedCriteria){ <db/. A3
return findPageByCriteria Mw5!9@Fc7
E[Io8|QA
(detachedCriteria, PaginationSupport.PAGESIZE, 0); %J%gXk}]
} v <Ze$^e&
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public PaginationSupport findPageByCriteria 0_y%Qj^e
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(final DetachedCriteria detachedCriteria, finalint ;09J;sf
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startIndex){ |)JoxqR
return findPageByCriteria O-2H!58$)
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`;}) .
(detachedCriteria, PaginationSupport.PAGESIZE, +`Bn]e8O
n_ez6{
startIndex); >%3c 1
} :3n.nKANr
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public PaginationSupport findPageByCriteria tw3d>H`
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(final DetachedCriteria detachedCriteria, finalint )LhO}zQ
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pageSize, >`\*{]
finalint startIndex){ OB^2NL~Q~
return(PaginationSupport) =,]J"n8|v
h5l
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getHibernateTemplate().execute(new HibernateCallback(){ 1W!n"3#
publicObject doInHibernate Pd;ClMa%
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(Session session)throws HibernateException { &lS0"`J=
Criteria criteria = tx1jBh:e=
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detachedCriteria.getExecutableCriteria(session); coFg69\^
int totalCount = O`0$pn
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((Integer) criteria.setProjection(Projections.rowCount 4K;j:ZJ"x
n)7icSc
()).uniqueResult()).intValue(); G-(c+6Mn
criteria.setProjection 6uXYZ.A
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(null); t(rU6miN
List items = qtH&]Suu,
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criteria.setFirstResult(startIndex).setMaxResults 9f6TFdUi"y
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(pageSize).list(); *_wef/==
PaginationSupport ps = Q%xY/xH]
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new PaginationSupport(items, totalCount, pageSize, 9c7}-Go
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startIndex); Yr= mLT|JN
return ps; S7q&|nI
} "qm> z@K
}, true); ">QY'r
} bgK(l d`
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public List findAllByCriteria(final >oNk(.
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DetachedCriteria detachedCriteria){ GDB>!ukg
return(List) getHibernateTemplate
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().execute(new HibernateCallback(){ *vO'Z &
publicObject doInHibernate oX4uRc7wR
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(Session session)throws HibernateException { ibc/x v2
Criteria criteria = WO9/rF_
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detachedCriteria.getExecutableCriteria(session); :Y3?,
return criteria.list(); w1_Ux<RF
} K)@}Ok"#\4
}, true); WLl9>v^1
} pzr-}>xrZ
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public int getCountByCriteria(final %$xFnGb
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DetachedCriteria detachedCriteria){ x+e
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Integer count = (Integer) :GYv9OG
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getHibernateTemplate().execute(new HibernateCallback(){ ,AM-cwwT:u
publicObject doInHibernate lpUtNy
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(Session session)throws HibernateException { %p60pn[(
Criteria criteria = 1F,_L}=o1s
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detachedCriteria.getExecutableCriteria(session); &zcjU+n
return Sh6Cw4 R
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criteria.setProjection(Projections.rowCount ;alFK*K6
bVHi3=0{
()).uniqueResult(); m_ m@>}ud
} OP}p;(
}, true); ,-Nk-g
return count.intValue(); <R>ZG"m {
} 6w;|-/:`
} )x &@j4,
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用户在web层构造查询条件detachedCriteria,和可选的 n^02@Aw
-(}1o9e\7
startIndex,调用业务bean的相应findByCriteria方法,返回一个 tlgvBRH>
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PaginationSupport的实例ps。 Sg>0P*K@
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ps.getItems()得到已分页好的结果集 j]"xck
ps.getIndexes()得到分页索引的数组 !@Lc/'w
ps.getTotalCount()得到总结果数 CHit
ps.getStartIndex()当前分页索引 E57{*C
ps.getNextIndex()下一页索引 1<`7MN
ps.getPreviousIndex()上一页索引 Z;\"pP:
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 =>\-ma+
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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 {taVAcb
8G] m7Z
一下代码重构了。 GTe:k
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我把原本我的做法也提供出来供大家讨论吧: yGGB
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首先,为了实现分页查询,我封装了一个Page类: vcO`j<`
java代码: \N , ' +
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/*Created on 2005-4-14*/ $uK"@Mw
package org.flyware.util.page; */y]!<\v!k
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/** dHF$T33It
* @author Joa 3,L3C9V'
* &MZy;Sq
*/ lN>C#e<]
publicclass Page { `Uj?PcS_
##FNq#F
/** imply if the page has previous page */ yPh2P5}H>
privateboolean hasPrePage; Ca@=s
QsJW"4d
/** imply if the page has next page */ 0&IXzEOr
privateboolean hasNextPage; 6*aa[,>
u<=KC/vZe
/** the number of every page */ "Lq|66
privateint everyPage; D>b5Uwt
)(Mr f{
/** the total page number */ !aw#',r8m
privateint totalPage; =Z .V+ 4+
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/** the number of current page */ N46$EsO!h
privateint currentPage; J2<
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/** the begin index of the records by the current tb?F}MEe
DwY<qNWT
query */ X0Z-1bs
privateint beginIndex; -F+P;S
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/** The default constructor */ 4[,B ;7
public Page(){ }#HTO:r
+}1hU
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} AOlt,MNpQ
f./m7TZ
/** construct the page by everyPage omv6_DdZ
* @param everyPage hQ}7Z&O
* */ c\)&yGE
public Page(int everyPage){ cP@F
#!2
this.everyPage = everyPage; f UF;SqT
} r ctSS:1
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/** The whole constructor */ u2-@?yt
public Page(boolean hasPrePage, boolean hasNextPage, ]r6BLZ[ %
leES YSY:
ke9QT#~p!-
int everyPage, int totalPage, ;j>Vt?:Pw
int currentPage, int beginIndex){ v=.z|QD^1
this.hasPrePage = hasPrePage; &H4uvJ_<
this.hasNextPage = hasNextPage; ?)mhJ/IT
this.everyPage = everyPage; _@/C~
this.totalPage = totalPage; _h1 HuL
this.currentPage = currentPage; O/Y\ps3r
this.beginIndex = beginIndex; C?60`^
} RJRq` T|m
kUg+I_j6*
/** UGmuX:@y76
* @return :qAc= IC%
* Returns the beginIndex. =l8!VJa
*/ 833%H`jQc
publicint getBeginIndex(){ uojh%@.4
return beginIndex; wAu[pWD'6;
} cNuHXaWp
k~1j/VHv
/** oT|P1t.
* @param beginIndex p`ADro*
* The beginIndex to set. S?Bc~y
*/ lP@)
publicvoid setBeginIndex(int beginIndex){ (~ ]g,*+
this.beginIndex = beginIndex; 5"kx}f2$
} pG!(6V-x<E
nrTv=*tDj
/** 9P7xoXJ@y
* @return "B9[cDM&
* Returns the currentPage. &N"'7bK6n
*/ jB%"AvIX
publicint getCurrentPage(){ 0Oc}rRH(C
return currentPage; >lraYMc<rZ
} `y^zM/Ib
_oJ2]f6KX
/** Dh&:-
* @param currentPage 5@ bc(H
* The currentPage to set. c{mKra
*/ >P\h,1
publicvoid setCurrentPage(int currentPage){ A,m4WO_q3
this.currentPage = currentPage; &0+x2e)7g
} YgfSC}a
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/** Jt2,LL:G
* @return 3tT|9Tb@
* Returns the everyPage. ` URSv,(
*/ 8"km_[JE e
publicint getEveryPage(){ c$Xe.:QY
return everyPage; "[jhaUAK
} 9Hf*cQ
cW)Oi^q%o2
/** NZo<IKD$
* @param everyPage oe(9mYWKa6
* The everyPage to set. X~v4"|a
*/ 5c:'>
publicvoid setEveryPage(int everyPage){ IjG5X[@
this.everyPage = everyPage; cq*p9c
} _m9~*
b:P\=k]8#
/** 2Vp>"
* @return X,RT<GNNb
* Returns the hasNextPage. (TEo_BW|+
*/ 87^:<\pp
publicboolean getHasNextPage(){
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return hasNextPage; wVgi+P
} p`>AnfG
3<c*v/L{C\
/** 44|deE3Z
* @param hasNextPage XnBm`vk?V!
* The hasNextPage to set. wL'oImE
*/ o" |O
]
publicvoid setHasNextPage(boolean hasNextPage){ `[WyHO|8
this.hasNextPage = hasNextPage; j#N(1}r=1
} }*iAE>;
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/** OuB2 x=B
* @return h ZoC _\
* Returns the hasPrePage. g-."sniP$g
*/ p1Q/g Il
publicboolean getHasPrePage(){ MWM
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return hasPrePage; qE>i,|rP`
} |vv]Z(_
\).Nag +
/** za,6du6
* @param hasPrePage fC_zX}3
* The hasPrePage to set. #hIEEkCp +
*/ 5pO]vBT
publicvoid setHasPrePage(boolean hasPrePage){ hzaU8kb
this.hasPrePage = hasPrePage; cX2$kIs;
} GGCqtA^@7d
Js/N()X
/** 6hZ.{8e0
* @return Returns the totalPage. YVo ao#!
* ('=Z}~
*/ ytEQ`
publicint getTotalPage(){ Iq+2mQi*/k
return totalPage; I?^aCnU
} StEQ
-k
!?jK1{E3
/** +<&E3O r
* @param totalPage nt7|f,_J
* The totalPage to set. ;:P7}v fz!
*/ d>UnJ)V}
publicvoid setTotalPage(int totalPage){ R0{Qy*YQ`
this.totalPage = totalPage; !6lOIgn
} zei6S
pg+b[7
} '?5S"??
+6
ho)YL
2zhn`m
^[#=L4
L/ ~D<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 mIvnz{_d
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个PageUtil,负责对Page对象进行构造: 7m\vRMK
java代码: -!l^]MU
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/*Created on 2005-4-14*/ Uls+n@\!
package org.flyware.util.page; DE%fF,Hk3
VrVDm*AGQ
import org.apache.commons.logging.Log; @a0Q0M
import org.apache.commons.logging.LogFactory; 975
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8yn4}`Nc@
/** 0 <g{ V
* @author Joa )Bo]=ZTJ^
* E30Ln_^o
*/ d ,UCH
publicclass PageUtil { NddO*`8+)
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privatestaticfinal Log logger = LogFactory.getLog sZKEUSFD #
RB[/q:
(PageUtil.class); [_V:)
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/** iA9 E^
* Use the origin page to create a new page nWk e#{[
* @param page ~T%Ui#Gc
* @param totalRecords e9 *lixh
* @return E:)Cp
*/ LX\)8~dp
publicstatic Page createPage(Page page, int ;,k=<]
pl|h>4af
totalRecords){ L/yaVU{aEb
return createPage(page.getEveryPage(), :> SLQ[1
\9w~pO
page.getCurrentPage(), totalRecords); GV5qdD(
} t{zBC?cR
*jE;9^
/** /D'M 24
* the basic page utils not including exception @MOCug4
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handler FIS "Z(
* @param everyPage l[oe*aYN7
* @param currentPage Lc|{aN
* @param totalRecords s9i|mVtm8
* @return page q*bt4,D&Es
*/ tb,9a!?
publicstatic Page createPage(int everyPage, int P\AqpQv
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currentPage, int totalRecords){ >'b=YlUL
everyPage = getEveryPage(everyPage); {jW%P="z$"
currentPage = getCurrentPage(currentPage); i $C-)d]
int beginIndex = getBeginIndex(everyPage, lI6W$V\,
&n>7Ir
currentPage); nR[^|CAR
int totalPage = getTotalPage(everyPage, rEM#D]k
at|
\FOKj
totalRecords); t"|DWC*
boolean hasNextPage = hasNextPage(currentPage, [1SMg$@<
|cgui
totalPage); cS(;Qs]Q
boolean hasPrePage = hasPrePage(currentPage); k"0;D-lTZ>
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returnnew Page(hasPrePage, hasNextPage, <^c3}
everyPage, totalPage, lL0M^Nv
currentPage, Juu+vMn1
R%"K
beginIndex); Vm,,uF
} OhFW*v
"(f`U.
privatestaticint getEveryPage(int everyPage){
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return everyPage == 0 ? 10 : everyPage; \f%.n]>
} 8EI:(NE*J
"%@v++4y
privatestaticint getCurrentPage(int currentPage){
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return currentPage == 0 ? 1 : currentPage; ),`8eQC
} ix&'0IrX*
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privatestaticint getBeginIndex(int everyPage, int orqJ[!u)`
y'
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currentPage){ cU8x Upq
return(currentPage - 1) * everyPage; <cj{Qk
} Ryv_1gR!
0` 5e
privatestaticint getTotalPage(int everyPage, int I2[]A,f,
'SV7$,mK@
totalRecords){ "r$/
int totalPage = 0; )];aI A$
tJ'iX>9I
if(totalRecords % everyPage == 0) snC/H G7
totalPage = totalRecords / everyPage; 7u|B ](FS
else wk @,wOt
totalPage = totalRecords / everyPage + 1 ; [_.n$p-
9 <\`nm
return totalPage; PVYyE3`UB
} WD.U"YI8y
`q_<Im%I
privatestaticboolean hasPrePage(int currentPage){ ].m qxf
return currentPage == 1 ? false : true; o35fifM`
} 6Hf,6>
,b|-rU\
privatestaticboolean hasNextPage(int currentPage, zk}{ dG^M:
L;/n!k.A
int totalPage){ K0Tg|9
return currentPage == totalPage || totalPage == x?sI;kUw8
+}JM&bfK
0 ? false : true; 76@qHTh}
} H=~9CJ+tc
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} ,;jGJr
m3 -9b"
f^b K=#
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q>s`uFRg(
上面的这两个对象与具体的业务逻辑无关,可以独立和抽象。 ,:GN;sIXg
'*T]fND4
面对一个具体的业务逻辑:分页查询出User,每页10个结果。具体 LW:1/w&pv
#/70!+J_UF
做法如下:
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1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 ."6[:MF
lr3mE
的信息,和一个结果集List: d%ME@6K)
java代码: Hj6'pJ4
lm0N5(XP
Tv$sqVe9
/*Created on 2005-6-13*/ &JhX+'U
package com.adt.bo; .%}+R|g
rx!=q8=0R
import java.util.List; n7! H:{L
FHg0E++?
import org.flyware.util.page.Page; 6v732;^
>:
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/** ^%<pJMgdF
* @author Joa K7(MD1tk
*/ (K<9hL+X
publicclass Result { l"pN90B4
C+N k"l9
private Page page; Qa4MZj;$K
Q8nId<\(
private List content; j6YiE~
]?LB?:6
/** zP) ~a
* The default constructor iiC!|`k"
*/ D4u%6R|F
public Result(){ A :e;k{J
super(); h~}.G{"
} l#qv 5f
jvwwJ<K
/** D E/:['
* The constructor using fields E"PcrWB&
* @cD uhK"U}
* @param page *?%
k#S
* @param content egR-w[{
*/ QlZ@ To
public Result(Page page, List content){ ^ c%N/V
\
this.page = page; {D`T0qPT[
this.content = content; osP\DiQ
} $l[Rh1z`;+
ftbpqp'
/** 01@t~v3!Z
* @return Returns the content. 7hw .B'7
*/ 04@cLDX8uB
publicList getContent(){ RHY4P4B<v>
return content; 9
c3E+
} AMCyj`Ur
L>9R4:g
/** T)iW`vZg8
* @return Returns the page. S4o$t-9l
*/ tkKJh !Q7
public Page getPage(){ {6Au3gt/
return page; rofNZ;nu
} n.}T1q|l
x3G :(YfO
/** +[-i%b3q
* @param content 5Fw - d
* The content to set. }IaA7f
*/ ]uh3R{a/
public void setContent(List content){ #f,y&\Xmf
this.content = content; \2v"YVWw
} nv/[I,nw
7/IlL
/** t?eH'*>
* @param page @%ECj)u`O
* The page to set. f'Mop= .
*/ zGo|JF
publicvoid setPage(Page page){ K\?]$dK5
this.page = page; DBH#)4do@
} {dWObh
} r6.d s^
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vGd1w%J-
&, a3@i
9$*s8}|
2. 编写业务逻辑接口,并实现它(UserManager, 7<\C?`q"
C(?blv-vM0
UserManagerImpl) 5FeFN)
java代码: @'2m$a
+0$/y]k
hGTV;eU
/*Created on 2005-7-15*/ *C|
package com.adt.service; ^s :y/Kd
:l u5Uu~
import net.sf.hibernate.HibernateException; O6s.<`\
iJh!KEy~A5
import org.flyware.util.page.Page; $.E6S<(h
-G |a*^
import com.adt.bo.Result; 9J-b6,
Gu0 ,)jy\
/** #
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* @author Joa QO;4}rq
*/ 'Prxocxq
publicinterface UserManager { Ri*3ySyb
2[yBD-":
public Result listUser(Page page)throws 5]Ajf;W\
}FqA ppr
HibernateException; r?$?;%|C
w}cY6O,1
} JCniN";r[
vIGw6BJI
T]9\VW4
es:2M |#O
aptY6lGv-|
java代码: tOl e>]
u{H?4|'(
%3Z/+uT@v]
/*Created on 2005-7-15*/ kSncZ0K{
package com.adt.service.impl; j Ch=@<9
Q4]4@96Aj
import java.util.List; {Tp2H_EG
6=GZLpv
import net.sf.hibernate.HibernateException; YUWn;#
E+95WF|4k"
import org.flyware.util.page.Page; VyLH"cCv
import org.flyware.util.page.PageUtil; eDKxn8+(H
D@ek9ARAq
import com.adt.bo.Result; I27,mS+]
import com.adt.dao.UserDAO; F=a+z/xKT
import com.adt.exception.ObjectNotFoundException; &dB-r&4;+
import com.adt.service.UserManager; kma?v B
coE&24,0
/** .x83Ah`
* @author Joa Pt,ebL~
*/ r),PtI0X
publicclass UserManagerImpl implements UserManager { sN=6 gCau
jH;Du2w
private UserDAO userDAO; `6=-WEo
&]6)LFm
/** gxNL_(A
* @param userDAO The userDAO to set. <=K qcHb
*/ gk0.zz([
publicvoid setUserDAO(UserDAO userDAO){ 6aft$A}XnD
this.userDAO = userDAO; _o3e]{
} &?,U_)x/
(t^n'V
/* (non-Javadoc) ~:4kU/]
* @see com.adt.service.UserManager#listUser -NGK@Yk22
?i\;:<e4
(org.flyware.util.page.Page) uYI@9U
*/ y^>Q/H\
public Result listUser(Page page)throws fT\:V5-
4<,|*hAT
HibernateException, ObjectNotFoundException { ;F:fM!l=
int totalRecords = userDAO.getUserCount(); zt24qTKL
if(totalRecords == 0) k3!a$0Bs;
throw new ObjectNotFoundException . RVVWqW
n
1b(\PA
("userNotExist"); Z3KO90O!8
page = PageUtil.createPage(page, totalRecords); XUMX*
List users = userDAO.getUserByPage(page); w&h2y4
returnnew Result(page, users); &7mW9]
} .1 )RW5|c
I5ss0JSl/
} ~`8hwR1&z
yc;3Id5?>
B:TR2G9UT
'=E9En#@
imB# Eo4eY
其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 Nil}js27
<~U4*
询,接下来编写UserDAO的代码: gwkb!#A
3. UserDAO 和 UserDAOImpl: |H}sYp
java代码: 66&EBX}
q}|U4MJm
M+>`sj
/*Created on 2005-7-15*/ Oft arD
package com.adt.dao; b]Kk2S/
6(&Y(/
import java.util.List; .\Fss(Zn
<Cpp?DW_
import org.flyware.util.page.Page; ?WI3/>:<
QWnndI_4p
import net.sf.hibernate.HibernateException; R@Y=o].2
MZv]s
/** UM%o\BiO
* @author Joa FjfN3#qlg
*/ 9W7#u}Z
publicinterface UserDAO extends BaseDAO { j|fd-<ng
le)DgIT>=
publicList getUserByName(String name)throws 8ip7^
.Ce8L&