Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 B; ~T|ex u
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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 iIg_S13
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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 !HFwQGP.Y
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分页支持类: [e (-
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java代码: Q"KH!Bu%P
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package com.javaeye.common.util; H4UnF5G
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import java.util.List; ,ua]h8
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publicclass PaginationSupport { 'O
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publicfinalstaticint PAGESIZE = 30; :E.mU{
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privateint pageSize = PAGESIZE; !JJY(o
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privateList items; wI)W:mUZZ
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privateint totalCount; 3=`UX
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privateint[] indexes = newint[0]; _uDtRoI8
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privateint startIndex = 0; !5ppA
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public PaginationSupport(List items, int qr:[y
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totalCount){ VXC_Y
setPageSize(PAGESIZE); *<J**FhcMu
setTotalCount(totalCount); ?k/Uw'J4u/
setItems(items); j5AW}
setStartIndex(0); 9+pnpaZB0
} B<i1UJ5
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public PaginationSupport(List items, int ?;\YiOTda
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totalCount, int startIndex){ yQ\c<z^e
setPageSize(PAGESIZE); rN
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setTotalCount(totalCount); =5+:<e,&
setItems(items); M}HGFN
setStartIndex(startIndex); xHHG|
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} N'IzHyo.
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public PaginationSupport(List items, int J-=&B5"O>
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totalCount, int pageSize, int startIndex){ LFtnSB8
setPageSize(pageSize); [<6ez;2q'
setTotalCount(totalCount); ~Xa >;
setItems(items); "@.hz@>
setStartIndex(startIndex); r" ^P>8
} iX}EJD{f
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publicList getItems(){ >[NNu Y~
return items; ZM0vB% M|
} "H6DiPh.E
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publicvoid setItems(List items){ L ej3? k
this.items = items; )%P!<|s:5
} 0D=6-P?^W
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publicint getPageSize(){ [Qr#JJ
return pageSize; _HGbR/
} A=>%KQc?
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publicvoid setPageSize(int pageSize){ H&l/o
this.pageSize = pageSize; S9-FKjU
} Lk4gjs,V
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publicint getTotalCount(){ ;=aj)lemCr
return totalCount; _A1r6
} 1#6c
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publicvoid setTotalCount(int totalCount){ EQ\/I(
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if(totalCount > 0){ =56O-l7T*w
this.totalCount = totalCount; n}0[EE!
int count = totalCount / y@e/G3
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pageSize; ^_n(>$
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if(totalCount % pageSize > 0) "cj6i{x,~w
count++; Dy
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indexes = newint[count]; }mz@oEB#vF
for(int i = 0; i < count; i++){ _I+QInD ;)
indexes = pageSize * [Q6PFdQ_JT
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i; $zKf>[K
} RX \%R
}else{ Igrr"NuDZ
this.totalCount = 0; 2XNO*zbve
} h:[%' htz
} /5pVzv+rm
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publicint[] getIndexes(){ !UDTNF?1
return indexes; :;HJ3V;
} t,Ss3
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publicvoid setIndexes(int[] indexes){ oP!oU2eqK
this.indexes = indexes; 16Cd0[h?
} N6EG!*
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publicint getStartIndex(){ c>mTd{Abi
return startIndex; v4OroG=^
} #-W
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publicvoid setStartIndex(int startIndex){ 9bwG3jn4?
if(totalCount <= 0) 8`Ih>
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this.startIndex = 0; |ZC@l^a7
elseif(startIndex >= totalCount) x5jd2wSDx
this.startIndex = indexes g:8k,1y5
v)1@Ew=Y%
[indexes.length - 1]; ;auT!a~a#
elseif(startIndex < 0) fAYp\k
this.startIndex = 0; z>}H[0[#
else{ '(fQtQ%
this.startIndex = indexes 21_sg f?
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[startIndex / pageSize]; ~T">)Y~+xI
} QN)EPS:y
} S+2we
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publicint getNextIndex(){ m9Xauk$(
int nextIndex = getStartIndex() + I' [gGK4F
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pageSize; 1{15#W
if(nextIndex >= totalCount) Qv1<)&Ft<
return getStartIndex(); VRE[vM'
else
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return nextIndex; `?=Y^+*!-
} 6 H{G$[2
}-/oL+j
publicint getPreviousIndex(){ :yxP3e%rp
int previousIndex = getStartIndex() - ?
R!Pf: t
SR>(GQ,m0;
pageSize; &a8%j+j
if(previousIndex < 0) t9~Y
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return0; yU|=)p5
else Lrjp
return previousIndex; !,<rW<&;
} ROi_k4Fj
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} v`&>m'
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抽象业务类 "M}3T?0 O
java代码: ^6@6BYf)
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/** |-9##0H
* Created on 2005-7-12 o*5b]XWw
*/ @yNCWa~N
package com.javaeye.common.business; /"@k_[O
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import java.io.Serializable; Pd+Wb3
import java.util.List; RDxvN:v
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import org.hibernate.Criteria; =zW`+++3
import org.hibernate.HibernateException; _};T:GOT
import org.hibernate.Session; )uO 3v
import org.hibernate.criterion.DetachedCriteria; nNhb,J
import org.hibernate.criterion.Projections; \7WZFh%:
import $Yj4&Two<
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org.springframework.orm.hibernate3.HibernateCallback; o4H'
import %GigRA@no
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org.springframework.orm.hibernate3.support.HibernateDaoS %'MR;hQsd8
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upport; P\3H<?@4
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import com.javaeye.common.util.PaginationSupport; COL_c<\
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public abstract class AbstractManager extends Lpk`qJ
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HibernateDaoSupport { iza.' Mm~
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privateboolean cacheQueries = false; ,-)ww:
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privateString queryCacheRegion; ]m\:XhI*<
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publicvoid setCacheQueries(boolean $yZ(ws
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cacheQueries){ "v+%F
this.cacheQueries = cacheQueries; i&Me7=~
} =UV=F/Af^
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publicvoid setQueryCacheRegion(String }/VSIS@Z
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queryCacheRegion){ 5wI j:s
this.queryCacheRegion = &P(vm@*
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queryCacheRegion; *cc|(EM
} 3&Fqd
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publicvoid save(finalObject entity){ Cgn@@P5ZC
getHibernateTemplate().save(entity); oI9-jW
} u\@L|rh
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publicvoid persist(finalObject entity){ K@@Jt
getHibernateTemplate().save(entity); 0hX@ta[Up
} ]*\<k
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publicvoid update(finalObject entity){ Iq(;?_
getHibernateTemplate().update(entity); o[>p
} y0
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publicvoid delete(finalObject entity){ (Ek=0;Cr
getHibernateTemplate().delete(entity); 6EkD(w
} 3L%g2`
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publicObject load(finalClass entity, 5h>t4 [~
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finalSerializable id){ J!*Pg<
return getHibernateTemplate().load AK5$>Pkvk
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(entity, id); et :v4^*f
} von~-51;
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publicObject get(finalClass entity, -}r(75C
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finalSerializable id){ &_y+hV{
return getHibernateTemplate().get .j 0]hn]
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(entity, id); 9@|X~z5E
} 4 4kb
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publicList findAll(finalClass entity){ 1MzOHE
return getHibernateTemplate().find("from 7w=%aW|
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" + entity.getName()); rKys:is
} 5-pz/%,
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publicList findByNamedQuery(finalString eX>X=Ku
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namedQuery){ C&ivjFf
return getHibernateTemplate E5 0$y:
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().findByNamedQuery(namedQuery); Cz_chK4
} d/ OIc){tD
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publicList findByNamedQuery(finalString query, V
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finalObject parameter){ ~!!>`x
return getHibernateTemplate ~4iIG}Y<
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().findByNamedQuery(query, parameter); :[N[D#/z
} 5!*5mtI
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publicList findByNamedQuery(finalString query, +B@NSEy/+
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finalObject[] parameters){ pstQithS
return getHibernateTemplate n]@+<TA<uA
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().findByNamedQuery(query, parameters); Mf&W<n^j
} 1a90S*M
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publicList find(finalString query){ J7.bFW'
return getHibernateTemplate().find >M^
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(query); 8P!dk5,,O
} Sh]x`3 ).
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publicList find(finalString query, finalObject L/GM~*Xp(O
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parameter){ &hba{!`y
return getHibernateTemplate().find WL}6YSC
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(query, parameter); LZG^\c$
} v-)eT
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public PaginationSupport findPageByCriteria 5
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(final DetachedCriteria detachedCriteria){ 4T9hT~cT7
return findPageByCriteria WytCc>oL
);z}T0C
(detachedCriteria, PaginationSupport.PAGESIZE, 0); %i%Xi+{3
} ?/)5U}*M0T
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public PaginationSupport findPageByCriteria ["Q8`vV0WO
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(final DetachedCriteria detachedCriteria, finalint ^^?DYC
5.[{PJ]bq
startIndex){ &J hN&Ur
return findPageByCriteria 2c%}p0<;|?
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(detachedCriteria, PaginationSupport.PAGESIZE, AD?DIE(v
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startIndex); [l#WS
} Pz|qy,
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public PaginationSupport findPageByCriteria HB`pK'gz
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(final DetachedCriteria detachedCriteria, finalint rY!uc!
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pageSize, HqXo;`Yy}
finalint startIndex){ {sm={q
return(PaginationSupport) jq0tMTb%L
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getHibernateTemplate().execute(new HibernateCallback(){ K%=n \Y
publicObject doInHibernate 0= 'DDy
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(Session session)throws HibernateException { =|U2 }U;
Criteria criteria = "ZyHt HAK
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detachedCriteria.getExecutableCriteria(session); k9Sqp:l,
int totalCount = K%pmE?%,8
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((Integer) criteria.setProjection(Projections.rowCount ,#wVqBEk
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()).uniqueResult()).intValue(); xeI ,Kz."
criteria.setProjection ?J~JQe42
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(null); %C3cdy_c
List items = HQ
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criteria.setFirstResult(startIndex).setMaxResults k(
g$_ ]X
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(pageSize).list();
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PaginationSupport ps = AltE~D/4
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new PaginationSupport(items, totalCount, pageSize, 87^
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startIndex); *cf"l
return ps; 8zc!g|5"
} +
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}, true); P+b^;+\1s
} Oq2H>eW`f
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public List findAllByCriteria(final z;/'OJ[.
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DetachedCriteria detachedCriteria){ og\XLJ}_
return(List) getHibernateTemplate gPwp
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().execute(new HibernateCallback(){ <=inogf
publicObject doInHibernate o 4b{>x
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(Session session)throws HibernateException { $0*47+f
Criteria criteria = MzG ryM-
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detachedCriteria.getExecutableCriteria(session); lBn*G&(P
return criteria.list(); iTt=aQjd
} >1~`tP
}, true); .]e6TFsrO
} btF%}<o)
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public int getCountByCriteria(final cik@QN<[0
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DetachedCriteria detachedCriteria){ 0l6iv[qu5w
Integer count = (Integer) /K!,^Xn
}}1/Ede{5
getHibernateTemplate().execute(new HibernateCallback(){ vQ/\BN
publicObject doInHibernate *_QHtZG
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(Session session)throws HibernateException { ;iORfUjxrq
Criteria criteria = K D-_~uIF
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detachedCriteria.getExecutableCriteria(session); i/J NG
return %^l&fM*
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criteria.setProjection(Projections.rowCount )/Xrhhx
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()).uniqueResult(); =Yj[MVn
} lkZC?--H
}, true); 5 WppV3;
return count.intValue(); jp^WsHI3
} FqsjuU@l
} J3x7i8
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用户在web层构造查询条件detachedCriteria,和可选的 4) iEj
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 &{/>Sv!6#
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PaginationSupport的实例ps。 YB{E=\~
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ps.getItems()得到已分页好的结果集 >ij4z
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ps.getIndexes()得到分页索引的数组 =+h!JgY/L
ps.getTotalCount()得到总结果数 rgzI
ps.getStartIndex()当前分页索引 dO4#BDn"=
ps.getNextIndex()下一页索引 ]0i2]=J&,
ps.getPreviousIndex()上一页索引 pmyM&'#Id
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 WJU NJN
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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 'HWgvmw(
bus=LAJt=
一下代码重构了。 _
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我把原本我的做法也提供出来供大家讨论吧: ~}0hN]*G
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首先,为了实现分页查询,我封装了一个Page类: z){UuiUM+=
java代码: !-RpRRR[Co
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/*Created on 2005-4-14*/ !$xEX,vj|W
package org.flyware.util.page; N^yO- xk
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/** @*"<U]
* @author Joa /-YlC(kL
* /N]Ow
*/ oZ>`Qu
publicclass Page { )4)iANH?
`;qv}
/** imply if the page has previous page */ xFm{oJ!]&
privateboolean hasPrePage; +Q!xEfpO;
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/** imply if the page has next page */ (bFWT_CChz
privateboolean hasNextPage; i)= 89?8
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/** the number of every page */ txfwLqx
privateint everyPage; Pv-V7`{
lzy$.H"W
/** the total page number */ @oqi@&L'C
privateint totalPage; /-K dCp~
y5Wqu9C\Io
/** the number of current page */ 0"<;You
privateint currentPage; %c&Ah
)|h;J4V
/** the begin index of the records by the current <,X+`m&
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query */ g.Caapy
privateint beginIndex; B
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/** The default constructor */ `^bvj]>l
public Page(){ [OoH5dD
;p#Z :6
} -6~dJTm[t
1|EU5<
/** construct the page by everyPage p-yOiG8b}
* @param everyPage a,57`Ks+n<
* */ E#{WU}
public Page(int everyPage){ i3 l #~
this.everyPage = everyPage; [mB(GL
} rxgVT4
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/** The whole constructor */ ]k`Fl,"
public Page(boolean hasPrePage, boolean hasNextPage, 8/>wgY
$>h!J.t
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int everyPage, int totalPage, %hQMC'c
int currentPage, int beginIndex){ kk/+Vx~
this.hasPrePage = hasPrePage; %j[LRY/
this.hasNextPage = hasNextPage; YKw!pu=
this.everyPage = everyPage; (:y,CsR}4
this.totalPage = totalPage; }Uwkef.Q
this.currentPage = currentPage; Z}K.^\S9
this.beginIndex = beginIndex; ,+NE: _
} L=$?q/=-
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/** c6Yf"~TD0
* @return csFJ5
* Returns the beginIndex. 1IF'>*
*/ *t?~)o7
publicint getBeginIndex(){ J+cAS/MYX
return beginIndex; {Ukc D+.Y
} }[KDE{,V
pRrqs+IJZ\
/** zh{@?k
* @param beginIndex l)i&ATvCE
* The beginIndex to set. =!g/2;-or
*/ ph8Jn+|E
publicvoid setBeginIndex(int beginIndex){ |>IUtUg\
this.beginIndex = beginIndex; 0?6If+AC
} RI5g+Du?
lC /Hib
/** ET,0ux9F
* @return %Vw|5yA4
* Returns the currentPage. BDm88<]
*/ [V2omSZo
publicint getCurrentPage(){ ~E<PtDab
return currentPage; ;*wT,2;
} <*A|pns
n?ZL"!$
/** o%/-5-
* @param currentPage ]{Mci]H6T
* The currentPage to set. <uBhi4
*/ #Cg}!38
publicvoid setCurrentPage(int currentPage){ +#-kIaU
this.currentPage = currentPage; ^&`sWO@=
} :_o] F
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/** B8cBQ v
* @return )]c]el@y
* Returns the everyPage. LXh@o1
*/ KJ0xp hf
publicint getEveryPage(){ .Ca"$2
return everyPage; "}'8`k+d
} g+ >=C
;gxN@%}@
/** xZ.~:V03\t
* @param everyPage W 9&0k+#^
* The everyPage to set. 93E,
*/ 7]/dg*A )C
publicvoid setEveryPage(int everyPage){ K9e~Wl<3
this.everyPage = everyPage; [)Z'N/;0
} '!j #X_;
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/** `2B*CMW{
* @return p4m^ ~e
* Returns the hasNextPage. 1a($8>
*/ ,2 zt.aqB
publicboolean getHasNextPage(){ <&qpl0U)Y
return hasNextPage; laUu"cS
} 3bbp>7V!
&Q-[;
/** H
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* @param hasNextPage w+Z- -@\
* The hasNextPage to set. `y8
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*/ ~")hE%Kl}
publicvoid setHasNextPage(boolean hasNextPage){ (R4PD
this.hasNextPage = hasNextPage;
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} 5cyddlaat
o}9M`[
/** 2Ueq6IuQ
* @return !Y ;H(.A/
* Returns the hasPrePage. N5pinR5 H
*/ Xt</ -`
publicboolean getHasPrePage(){ iGG6Myp-
return hasPrePage; _u:>1]
} wF|0n t
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/** {l&Ltruhz
* @param hasPrePage l^DINZU@
* The hasPrePage to set. >.DF"]XM
*/ +R|U4`12
publicvoid setHasPrePage(boolean hasPrePage){ k1ipvKxp:8
this.hasPrePage = hasPrePage; {Oy9RESqc
} =)(3Dp
;]2x
/** |ZvNH ~!
* @return Returns the totalPage. E
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* $x?NNS_ "J
*/ ?8 SK\{9r6
publicint getTotalPage(){ AuoxZ?V
return totalPage; DJmoW
} ayV6m
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/** YniZ(
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* @param totalPage `^v4zWDK
* The totalPage to set.
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*/ u9TzZ
publicvoid setTotalPage(int totalPage){ HG2N-<$
this.totalPage = totalPage; -'I _*fu
} k4S} #!
l%rx#;=u
} 285_|!.Y
w-
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/h/6&R0l
1|o$X
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上面的这个Page类对象只是一个完整的Page描述,接下来我写了一 ;*y|8od
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个PageUtil,负责对Page对象进行构造: 6!ZVd#OM%
java代码: \.c]kG>k-
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/*Created on 2005-4-14*/ d!`lsh@tF
package org.flyware.util.page; )8[ym/m
q\a[S*
import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory; dSwm|kIa
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/** 2< p{z
* @author Joa
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* Yx6hA#7I
*/
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publicclass PageUtil { pJd 0k"{
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privatestaticfinal Log logger = LogFactory.getLog ;SfNKu
U);OR
(PageUtil.class); 4py(R-8\
1 ojhh7<
/** 9u?(^(.
* Use the origin page to create a new page pFpZbU^
* @param page (Up'$J}
* @param totalRecords `8,w[o oC2
* @return fCB:733H
*/ B]1HS`*7
publicstatic Page createPage(Page page, int NjbwGcH%\
t)ld<9)eB
totalRecords){ !(Q l)C
return createPage(page.getEveryPage(), nB=0T`vQ
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page.getCurrentPage(), totalRecords); X6xx2v%D
} [Gh"ojt]w
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/** aM), M]m[
* the basic page utils not including exception VMx%1^/(
;
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handler tev QW
* @param everyPage GJX4KA8J
* @param currentPage Y&s2C%jT
* @param totalRecords `|]e6Pb
* @return page }'lNi^"XL
*/ Q!K`e )R
publicstatic Page createPage(int everyPage, int [G a~%m
&eIGF1ws
currentPage, int totalRecords){ m=QCG)s
everyPage = getEveryPage(everyPage); ymtd>P"
currentPage = getCurrentPage(currentPage); :7\9xH
int beginIndex = getBeginIndex(everyPage, h4Ia>^@
B20_ig:
currentPage); \OcMiuw
int totalPage = getTotalPage(everyPage, 2/@D7>F&g
>\ZR*CS
totalRecords); k5@d! }#c
boolean hasNextPage = hasNextPage(currentPage, 8a9RML}G<
=<{ RX8
totalPage); {rC~P
boolean hasPrePage = hasPrePage(currentPage); S8%n .<OB
Ib1e#M3
returnnew Page(hasPrePage, hasNextPage, O6iCZ
everyPage, totalPage, ~s#e,Kav"
currentPage, :M j_2
kM!V.e[g
beginIndex); ?>V6P_r>
} :mpiAs<%U"
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privatestaticint getEveryPage(int everyPage){ W/r^ugDV
return everyPage == 0 ? 10 : everyPage; I]X
} cOkgoL" 4
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privatestaticint getCurrentPage(int currentPage){ 4\p-TPM
return currentPage == 0 ? 1 : currentPage; 2J<&rKCF
} .Pw%DZ'
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privatestaticint getBeginIndex(int everyPage, int ;xK_qBIP
/)9W1U^B
currentPage){ ,)h)5o(?
return(currentPage - 1) * everyPage; B!b sTvX
} B
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privatestaticint getTotalPage(int everyPage, int M^6$
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totalRecords){ LmQ/#Gx
int totalPage = 0; Z)&D`RCf
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if(totalRecords % everyPage == 0) WA.AFt
totalPage = totalRecords / everyPage; aV>aiR=
else .0|=[|
totalPage = totalRecords / everyPage + 1 ; Q>8pP \ho
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return totalPage; frN3S
} Km3&N
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privatestaticboolean hasPrePage(int currentPage){ @T&t.|`
return currentPage == 1 ? false : true; -[R!O'N9
} =MLf[
\Hwg) Uc{
privatestaticboolean hasNextPage(int currentPage, F98i*K`"
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int totalPage){ >qR~'$,$
return currentPage == totalPage || totalPage == 9s` /~ a@
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0 ? false : true; ? _<[T
}
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} !QEL"iJ6M'
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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。 /N)5
3!LT
8LJ{i%
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 !@g)10u
1f4bt6[
做法如下: ;/LD)$_
1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 u+D[_yd^
x*}bo))hb
的信息,和一个结果集List: }!)F9r@\
java代码: 8]< f$3.
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4vdNMV~
/*Created on 2005-6-13*/ ~rv})4h
package com.adt.bo; $/_qE
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import java.util.List; cDV^8 R
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import org.flyware.util.page.Page; "0&N}
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/** E\{< ;S
* @author Joa vR>o}%`
*/ NY.k.
publicclass Result { <]G${y*;
t FgX\4
private Page page; n56;m`IU
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private List content; A0xC,V~z
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/** x#8w6@iPQ
* The default constructor hI|)u4q
*/ cA;js;x@
public Result(){ ?m;;D'1j
super(); ^_>!B)
} orIQ~pF#
jo98
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/** \u{8Bak0
* The constructor using fields qpqokK
* w'ybbv{c
* @param page =AOWeLk*G
* @param content Xl%0/o
*/ IFuZ]CBz
public Result(Page page, List content){ H:S,\D?%2x
this.page = page; <@,$hso7:
this.content = content; H+ZSPHs
} =_pwA:z"A
r;qzo.
/** p!W[X%`)
* @return Returns the content. z?ucIsbR
*/ y' x F0
publicList getContent(){ ,&]MOe4@>
return content; '2^
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} IcF@F>>
85 ]SC$
/** :tGYs8UK
* @return Returns the page. 61K"(r~
*/ ..KwTf
public Page getPage(){ k#)Ad*t
return page; t})$lM
} 7_\Mwy{P
h##WA=1QZ
/** U/w. M_S
* @param content O\beKBT;
* The content to set. 'ks{D(`
*/ HKmcQM
public void setContent(List content){ uV]ULm#,i
this.content = content; *l>0t]5YH
} i~yX tya
n9hm790x-
/** KCR N}`^
* @param page <$E6oZ
* The page to set. faJM^ u
*/ Ruaur]
publicvoid setPage(Page page){ RR|\- 8;
this.page = page; \54}T4R
} )]Ti>R O7
} t#~?{i@m
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}ot"Sx\.
2. 编写业务逻辑接口,并实现它(UserManager, d@kc[WLD^
FJS'G^
UserManagerImpl) lZ+!H=`
java代码: &Cro2|KZhG
zg}YGu|J
1'KishHK=
/*Created on 2005-7-15*/ YUkud2,j
package com.adt.service; @h9MxCE!
3<(q }
import net.sf.hibernate.HibernateException; >Hwc,j
q
LtKB v4
import org.flyware.util.page.Page; 6m`{Z`c$
zCe/Kukvy
import com.adt.bo.Result; OkH\^
grcbH
/** >SI<rR[~%
* @author Joa e>H:/24
*/ QGPw2Q
publicinterface UserManager { ;4~U,+Av
|:q/Dt@
public Result listUser(Page page)throws r6.N4eW.L
4\2V9F{s
HibernateException; |!*Xl)
]
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} +V8b
{]/8skov5]
Zz"}Cz:bX
H7&xLYQ2
>)4YP*qIPb
java代码: 1(gfdx9|b
mN}7H:,
1Ix3i9
/*Created on 2005-7-15*/ W)=%mdxW0
package com.adt.service.impl; Fvl`2W94;
h%}(h2W
import java.util.List; <[Oo*:A!7
<