Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 AXpg_JC
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 +R8G*2
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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 1K#%mV_
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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 *qZBq&7tb
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分页支持类: 8,@0~2fz#
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java代码: lFtH;h,==v
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package com.javaeye.common.util; B ({g|}|G+
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import java.util.List; <KX fh
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publicclass PaginationSupport { OF} ."a
}
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publicfinalstaticint PAGESIZE = 30; p%R+ c
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privateint pageSize = PAGESIZE; ~ <36vsk
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privateList items; \`0s %F:V}
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privateint totalCount; 11vAx9
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privateint[] indexes = newint[0]; 5?Ukf$)x
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privateint startIndex = 0;
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public PaginationSupport(List items, int <A(Bq'eQM
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totalCount){ pAws{3(Q
setPageSize(PAGESIZE); 2w}l!'ue
setTotalCount(totalCount); GG`j9"t4
setItems(items); "l{{H&d
setStartIndex(0); e3mFO+
} q/^?rd
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public PaginationSupport(List items, int Y P,>vzW
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totalCount, int startIndex){ T>pyYF1Q
setPageSize(PAGESIZE); U.WXh(`%
setTotalCount(totalCount); /}/GK|tj
setItems(items); BNgm+1?L
setStartIndex(startIndex); U[? f@.&
} $>7T s>8
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public PaginationSupport(List items, int 34QW^{dgE
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totalCount, int pageSize, int startIndex){ ^T#jBqe
setPageSize(pageSize); W&k@p9
setTotalCount(totalCount); :uJHFF xg
setItems(items); 9}_'
setStartIndex(startIndex); i;atYltEJ2
} &e78xtA{
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publicList getItems(){ cm0$v8
return items; @+0dgkJ
} gA`QV''/:
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publicvoid setItems(List items){ _e/Bg~
this.items = items; {1_<\~J
} Xr:s-L
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publicint getPageSize(){ P4zwTEk`
return pageSize; ^f57qc3nF
} [mQdc?n\
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publicvoid setPageSize(int pageSize){ JVGTmS[3
this.pageSize = pageSize; CG95ScrX
} E0x\h<6W~
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publicint getTotalCount(){ ^ir)z@P?V
return totalCount; O c.fvP^ZD
} N~0ihTG5
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publicvoid setTotalCount(int totalCount){ %ZcS"/gf
if(totalCount > 0){ -k@1#c+z
this.totalCount = totalCount; f[
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int count = totalCount / )dFPfu&HL
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pageSize; +hKs
if(totalCount % pageSize > 0) `!spi=f
count++; =av0a!
indexes = newint[count]; D.-G!0!
for(int i = 0; i < count; i++){ >28l9U
indexes = pageSize * ( et W4p
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} l p(D@FT
}else{ -Lq2K3JHyn
this.totalCount = 0; V1,/qd_
} g*(z.
} GXIzAB(
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publicint[] getIndexes(){
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return indexes; pF7N = mO
} <f`n[QD2z
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publicvoid setIndexes(int[] indexes){ `N&*+!O%
this.indexes = indexes; ^{{a
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} +q;{%3C
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publicint getStartIndex(){ "M@&*<S
return startIndex; K a&
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} 8{QCW{K
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publicvoid setStartIndex(int startIndex){ ; o
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if(totalCount <= 0) |d&C<O;f
this.startIndex = 0; ,vO\n^
elseif(startIndex >= totalCount) d:w/{m%#
this.startIndex = indexes gS'7:UH,
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[indexes.length - 1]; Yku6\/^
elseif(startIndex < 0) 6PYm?i=p?
this.startIndex = 0; z HvE_-
else{ [^?i<z{0C
this.startIndex = indexes Z'>UR.g
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[startIndex / pageSize]; `^,E4Q y
} oH+PlL
} XI ;] c5
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publicint getNextIndex(){ Pc =ei
int nextIndex = getStartIndex() + FwlDP
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pageSize; |!9xL*A
if(nextIndex >= totalCount) bS2g4]$'po
return getStartIndex(); {lH'T1^m
else ?O+.
return nextIndex; &6C]|13;
} tq~4W% p/
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publicint getPreviousIndex(){ x s\<!
int previousIndex = getStartIndex() - ?d3FR!
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pageSize;
;}?ZH4.S
if(previousIndex < 0) YPGzI]\
return0; dqJ 8lU?
else xEurkR
return previousIndex; u6F>o+Td)
} as]M%|/-I
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} BO4;S/ O
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抽象业务类 v@ OELJX
java代码: 7Y[ q)lv
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/** Ahl&2f\
* Created on 2005-7-12 Qw5(5W[L
*/ O|+ZEBP
package com.javaeye.common.business; :e=7=|@7
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import java.io.Serializable; ?g{[U0)
import java.util.List; T)sIV5bk
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import org.hibernate.Criteria; O5vfcX4>
import org.hibernate.HibernateException; krFp q;
import org.hibernate.Session; |f @A-d X
import org.hibernate.criterion.DetachedCriteria; u9|Eos i
import org.hibernate.criterion.Projections; ']eN4H&=?}
import 2F`#df
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org.springframework.orm.hibernate3.HibernateCallback; jvsSP?]n
import Zs79,*o+0M
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org.springframework.orm.hibernate3.support.HibernateDaoS -k7b#
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upport; s7sd(f]=
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import com.javaeye.common.util.PaginationSupport; .tLRY
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public abstract class AbstractManager extends a'|]_`36x
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HibernateDaoSupport {
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privateboolean cacheQueries = false; J)B3o$
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privateString queryCacheRegion; o.NU"$\?
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publicvoid setCacheQueries(boolean hG.}>(VV
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cacheQueries){ ] 9C)F*r7
this.cacheQueries = cacheQueries; zA6C{L G3
} z+;$cfN
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publicvoid setQueryCacheRegion(String ?m2FN<S
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queryCacheRegion){ 4cSs=|m?+
this.queryCacheRegion = ! PGCoI
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queryCacheRegion; qjkWCLOd
} }NwmZw>_
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publicvoid save(finalObject entity){ Cj3Xp~
getHibernateTemplate().save(entity); 9 c9$cnQ
} xj U0&
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publicvoid persist(finalObject entity){ Od;k}u6;<
getHibernateTemplate().save(entity); @w= =*.x
} *(q{k%/M
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publicvoid update(finalObject entity){ hs;|,r
getHibernateTemplate().update(entity); !gRU;ZQU_
} 0 fT*O
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publicvoid delete(finalObject entity){ rU"AO}6\@
getHibernateTemplate().delete(entity); .O0eSp|e
} j -o
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publicObject load(finalClass entity, ,?j!c*
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finalSerializable id){ .aa7*e
return getHibernateTemplate().load DL~!
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(entity, id); "gI-S[
} @(a~p
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publicObject get(finalClass entity, mD +9/O!
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finalSerializable id){ /rD9)
return getHibernateTemplate().get bHSoQ \
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(entity, id); hOLlZP+
} l>`S<rGe
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publicList findAll(finalClass entity){ >^9j>< Z
return getHibernateTemplate().find("from !lEV^SQJs
}.|a0N 5
" + entity.getName()); ZUB]qzmK
} ?UflK
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publicList findByNamedQuery(finalString w].DLoz
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namedQuery){ 7]L}~
return getHibernateTemplate NPBOG1q%
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().findByNamedQuery(namedQuery); SP2";,%/9
} ;+f(1=x
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publicList findByNamedQuery(finalString query, epk
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finalObject parameter){ E]a,2{&8<
return getHibernateTemplate l3MA&&++KF
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().findByNamedQuery(query, parameter); p,8:(|(
} O>X!78]#K
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publicList findByNamedQuery(finalString query, '2|mg<Ft
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finalObject[] parameters){ 96F+I!qC
return getHibernateTemplate ^JIs:\g<<
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().findByNamedQuery(query, parameters); dXt@x8E
} yyVJb3n5:!
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publicList find(finalString query){ PL\4\dXB
return getHibernateTemplate().find !C' Y
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(query); "$%&C%t
}
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publicList find(finalString query, finalObject /WAOpf5
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parameter){ K^AIqL8
return getHibernateTemplate().find 8.`5"9Vh
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(query, parameter); P)=$0kR3
} =snJ+yn!
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public PaginationSupport findPageByCriteria m:;`mBOc3
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(final DetachedCriteria detachedCriteria){ ^?0WE
return findPageByCriteria y3'K+?4
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); BXl
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} 3XjY
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public PaginationSupport findPageByCriteria ]ao%9:P;
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(final DetachedCriteria detachedCriteria, finalint ug`Jn&x!
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startIndex){ jA%R8hdr_
return findPageByCriteria Dm;aTe
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(detachedCriteria, PaginationSupport.PAGESIZE, _ =O;Lz$x
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startIndex); bb`DyUy ^+
} QN~9O^
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public PaginationSupport findPageByCriteria -S$Y0FDV
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(final DetachedCriteria detachedCriteria, finalint pEGHW;
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pageSize, ZoKX ao
finalint startIndex){ lS`VJA6l.
return(PaginationSupport) x5W@zqj
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getHibernateTemplate().execute(new HibernateCallback(){ r<kqs,-~
publicObject doInHibernate ~rz%TDX0\
\9.@Tg8`
(Session session)throws HibernateException { v.H@Ey2
Criteria criteria = hKK"D:?PRs
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detachedCriteria.getExecutableCriteria(session); fJG!TQJ[Y
int totalCount = Ria*+.k@"B
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((Integer) criteria.setProjection(Projections.rowCount <m?/yREK2
dy0xz5N-
()).uniqueResult()).intValue(); y"0!7^
criteria.setProjection q&k?$rn
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(null); qc^qCGy!z
List items = nR$Q~`
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criteria.setFirstResult(startIndex).setMaxResults K06&.>v_
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(pageSize).list(); &f>1/"lnd\
PaginationSupport ps = _/[(&}M
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new PaginationSupport(items, totalCount, pageSize, yy3-Xu4
>9]i#So^
startIndex); 4ze4{a^
return ps; L {i|OK^e
} Rlf#)4
}, true); *[['X%f
} }#f~"-O
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public List findAllByCriteria(final /3v`2=b
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DetachedCriteria detachedCriteria){ 3/((7O[
return(List) getHibernateTemplate Kkds^v6
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().execute(new HibernateCallback(){ {5gh.
publicObject doInHibernate -r"h[UV)
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(Session session)throws HibernateException { 5PCKBevV
Criteria criteria = -}*YfwK
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detachedCriteria.getExecutableCriteria(session); lAPvphO
return criteria.list(); L9)nRV8
} vb Mv8Nk
}, true); ];o[Yn'>o
} ~~'UQnUN4
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public int getCountByCriteria(final o@0p
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DetachedCriteria detachedCriteria){ kFHtZS(
Integer count = (Integer) "Dwaq*L
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getHibernateTemplate().execute(new HibernateCallback(){ PG/xX
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publicObject doInHibernate d$` NApr
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(Session session)throws HibernateException { N-Nq*
Criteria criteria = GE[J`?E]
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detachedCriteria.getExecutableCriteria(session); }EZd=_kAq~
return 9nPc>O$
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criteria.setProjection(Projections.rowCount hzjEO2
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()).uniqueResult(); YAf`Fnmw
} x7]Yn'^'
}, true); &*#- %<=1
return count.intValue(); !
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} AGxG*KuZ
} #2023Zo]
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用户在web层构造查询条件detachedCriteria,和可选的 $NtbI:e{
_ *O^|QbM
startIndex,调用业务bean的相应findByCriteria方法,返回一个 .UuCTH;6`
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PaginationSupport的实例ps。 }vbs6u
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ps.getItems()得到已分页好的结果集 CcHf1
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ps.getIndexes()得到分页索引的数组 sSMcF[]@2I
ps.getTotalCount()得到总结果数 }QL 2#R
ps.getStartIndex()当前分页索引 8&"@6/)[
ps.getNextIndex()下一页索引 WU
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ps.getPreviousIndex()上一页索引 75LIQ!G|=
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 Sb&[V>!2^
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,尤其是上面的示例代码,让我着实觉得该对我原来的分页查询做 o7*z@R"
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一下代码重构了。 2R!1Vl
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我把原本我的做法也提供出来供大家讨论吧: :!h1S`wS
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首先,为了实现分页查询,我封装了一个Page类: 0]c 2 T
java代码: s3*h=5bX=
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/*Created on 2005-4-14*/ jQp7TdvLE$
package org.flyware.util.page; =~i~SG/f
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/** y-TS?5Dr]
* @author Joa L`$MOdF{_
* ^nYS@
*/ ",c(cYVW
publicclass Page { >+w(%;i;
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/** imply if the page has previous page */ 8()L }@y
privateboolean hasPrePage; hDp
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/** imply if the page has next page */ K>2mm!{
privateboolean hasNextPage; _Kp{b"G
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/** the number of every page */ ,{ C
privateint everyPage; "-'w,g
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/** the total page number */ #[^?f[9r
privateint totalPage; v(?^#C>6W
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/** the number of current page */ Cw<bu|?
privateint currentPage; .~+I"V{yF
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/** the begin index of the records by the current (=d%Bn$6b
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query */ MZGN,[~)6
privateint beginIndex; {CM%QMM
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/** The default constructor */ V=pg9KR!T
public Page(){ %C_RBd
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} $z!o&3c'x
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/** construct the page by everyPage ;O*y$|+PA
* @param everyPage -0 [^w
* */ ]>NP?S
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public Page(int everyPage){ 4+t9"SD
this.everyPage = everyPage; c]`}DH,TJ
} Ds4n>V,o
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/** The whole constructor */ OXy>Tlv
public Page(boolean hasPrePage, boolean hasNextPage, 36154*q
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int everyPage, int totalPage, +1j@n.)ft
int currentPage, int beginIndex){ [-)N}rL>
this.hasPrePage = hasPrePage; (Yz EsY
this.hasNextPage = hasNextPage; `p@YV(
this.everyPage = everyPage; ~yH<,e
this.totalPage = totalPage; *~F\k):>
this.currentPage = currentPage; 2f8fA'|O
this.beginIndex = beginIndex; `B{N3Kxbp
} [HJ^'/bB'
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/** +$KUy>
* @return Np4';H
* Returns the beginIndex. Hmt}@
*/ nYJ)M
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publicint getBeginIndex(){ w(O/mUDX
return beginIndex; {{c/:FTEU
} =.9L/74@
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/** uXiAN#1
* @param beginIndex <StyO[
* The beginIndex to set. G992{B
*/ !/W[6'M#p
publicvoid setBeginIndex(int beginIndex){ *ip2|2G$
this.beginIndex = beginIndex; 8=rD'*
} e_Na_l]
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/** c"w}<8
* @return bce>DLF
* Returns the currentPage. $;1#gq%
*/ [:-Ltfr
publicint getCurrentPage(){ pp$WM\r
return currentPage; 5;wA7@
} !424K-nW
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/** \|\Dc0p}
* @param currentPage " (c#H
* The currentPage to set. hqW4.|&\c
*/ VP
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publicvoid setCurrentPage(int currentPage){ 8<UD#i@:C
this.currentPage = currentPage; 6-U+<[,x
} \F;V69'
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/** fZK&h.
* @return t|Cp<k]B
* Returns the everyPage. uGIA4CUm
*/ 1!,xB]v1Ri
publicint getEveryPage(){ 3.M<ATe^
return everyPage; 1|)l6#hOL
} ig(a28%
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/** 6/`$Y!.ub
* @param everyPage H79XP. TtE
* The everyPage to set. >U\,(VB
*/ :_;9&[H9ha
publicvoid setEveryPage(int everyPage){ kwRXNE(k]_
this.everyPage = everyPage; Mg?^ 5`*
} cn&\q.!fh
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/** J%d\ 7
* @return BdcTKC
* Returns the hasNextPage. QeP8Vl&e:
*/ ZS0=xS5q)
publicboolean getHasNextPage(){ L&$ X\\Lv^
return hasNextPage; $\kqh$")
} (q'w"q j
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/** r`5[6)+P
* @param hasNextPage %a%x`S3
* The hasNextPage to set. w
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*/ ,7:_M>-3g
publicvoid setHasNextPage(boolean hasNextPage){ G}1?lO_d`
this.hasNextPage = hasNextPage; H^cB?i
} nQ4 s
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/** Hn"xn79nc
* @return B. Rc s
* Returns the hasPrePage. OYKeu(=L
*/ >%jQw.
publicboolean getHasPrePage(){ 16"eyt>
return hasPrePage; P$z8TDCH
} dIiQ^M
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/** ^E_`M:~
* @param hasPrePage @T53%v<5
* The hasPrePage to set. bp G`,[
*/ xE(VyyR
publicvoid setHasPrePage(boolean hasPrePage){ &9bsTm
this.hasPrePage = hasPrePage; 2Cd#~
} L~N<<8?\
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/** 8z&7wO
* @return Returns the totalPage. siveqz6h
* i=$##
*/ ]k~k6#),;
publicint getTotalPage(){ ;WX)g&19x
return totalPage; k(|D0%#b7
} ()1\b
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/** llVm[7
* @param totalPage dL%?k@R
* The totalPage to set. SaKaN#C
*/ 28qTC?
publicvoid setTotalPage(int totalPage){ ,$irJz F
this.totalPage = totalPage; v%O KOrJ
} ZuIr=`"j
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上面的这个Page类对象只是一个完整的Page描述,接下来我写了一 >`Xikn(
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个PageUtil,负责对Page对象进行构造: -a:+ h\K
java代码: ]?!#*<t r
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/*Created on 2005-4-14*/ !{'C.sb?~
package org.flyware.util.page; A$gP: 1&m
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import org.apache.commons.logging.Log; J^tLK T B
import org.apache.commons.logging.LogFactory; ?&ie;t<7
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/** y[M<x5
* @author Joa ziUEA>m*/
* wlc Cz
*/ M*M,Z
publicclass PageUtil {
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privatestaticfinal Log logger = LogFactory.getLog pVgzUu7
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(PageUtil.class); d/I,`
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/** zN2CI6
* Use the origin page to create a new page mx`QBJ
* @param page 8nzDLFxp_
* @param totalRecords m-V_J`9"
* @return HCOv<k
*/ Nn/me
publicstatic Page createPage(Page page, int `[)
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totalRecords){ 3>60_:+Zb
return createPage(page.getEveryPage(), D#VUx9kugv
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page.getCurrentPage(), totalRecords); 9!CD25u
} \0gU)tVZ
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/** 3d<Z##`{4
* the basic page utils not including exception }<m'Nkz<X
AlZ]UGf^
handler nPlg5&E
* @param everyPage D^]g`V*N
* @param currentPage 0\W6X;?
* @param totalRecords Uwj|To&QR
* @return page #8xP,2&zf
*/ jtS-nQ|
publicstatic Page createPage(int everyPage, int rQE:rVKVh
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currentPage, int totalRecords){ KK-}&N8
everyPage = getEveryPage(everyPage); _JEe]
currentPage = getCurrentPage(currentPage); [g<rzhC~=
int beginIndex = getBeginIndex(everyPage, PBkTI2 v
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currentPage); +!"GYPUXy
int totalPage = getTotalPage(everyPage, qYba%g9RN(
d8N{sT
totalRecords); l~mC$>f
boolean hasNextPage = hasNextPage(currentPage, }\#u~ k!l
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;,&
totalPage); H6o_*Y
boolean hasPrePage = hasPrePage(currentPage); Ja4j7d1:
g
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returnnew Page(hasPrePage, hasNextPage, C-2{<$2k
everyPage, totalPage, =lb5 #
currentPage, ^*g= 65!1
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beginIndex); ]a=n(`l?
} p;xMudM
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privatestaticint getEveryPage(int everyPage){ Xtk3~@
return everyPage == 0 ? 10 : everyPage; 9*Z!=Y#4,
} v#^ _|
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privatestaticint getCurrentPage(int currentPage){ +o3 ZQ9
return currentPage == 0 ? 1 : currentPage; ]broU%#"
} NG+%H1!$_
r-e-2y7
privatestaticint getBeginIndex(int everyPage, int zk m#w
[wkSY>Gu
currentPage){ r?%,#1|$$
return(currentPage - 1) * everyPage; rds4eUxe
} 4R}$P1 E
\Dx5= Lh
privatestaticint getTotalPage(int everyPage, int GeFu_7u!|
U-.A+#<IT9
totalRecords){ N2uTWT>
int totalPage = 0; |-Q="7b%
k*ZYT6Z?
if(totalRecords % everyPage == 0) Wr6y w#
totalPage = totalRecords / everyPage; yc7"tptfF
else INNTp[
totalPage = totalRecords / everyPage + 1 ; {36QZV*P
BbG=vy8'l
return totalPage; iezY+`x4
} pP)> x*1
3gQ2wP*K
privatestaticboolean hasPrePage(int currentPage){ 3kW%,d*_
return currentPage == 1 ? false : true; k =
} GhC%32F
R+<M"LriR&
privatestaticboolean hasNextPage(int currentPage, WqRaD=R->;
LTZ~Id-)P
int totalPage){ g0k{b
return currentPage == totalPage || totalPage == .2f0e[J
1Q!^%{Y;
0 ? false : true; S{S.H?{F
} 9Itj@ps
83pXj=k<
XQStlUw8+
} \~#$o34V
5;[h&jH
O[5u6heNMr
' p!\[*e
J%1 2Ey@6
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。 +"3K)9H
dk.VH!uVb
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 pKhV<MFB
9t"/@CH{
做法如下: /9<62F@zJ"
1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 ZJ'FZ8Sx
te
b/
的信息,和一个结果集List: m<GJ1)%3i
java代码: (R^Ca7F
&-(p~[|
8]A`WDO3
/*Created on 2005-6-13*/ oF=UjA
package com.adt.bo; Qe4"a*l-r
N6uKFQL:{
import java.util.List; P7y.:%DGD0
?T7ndXX
import org.flyware.util.page.Page; `cpUl*Y=
>-4kO7.V
/** !~a1xI~s
* @author Joa )kt,E}609
*/ `dm}|$X|
publicclass Result { V38v2LI
k%h%mz
private Page page; T)#eaz$4W
)jm u*D5N
private List content; 9p%8VDF=
Pskg68W
/** wf/DLAC
* The default constructor hG
qZB
*/ tN&_f==e
public Result(){ &?#!%Ds
super(); Q+=D#x
} -: 8[
gs9VCaIa
/** ;eiqzdP
* The constructor using fields YN($rAkL
* 6dQ]=];
* @param page ZE"Z_E;r
* @param content 6),VN>j
*/ &dvL`
public Result(Page page, List content){ 07qL@![!
this.page = page; sA[eKQjaD
this.content = content; Bw8&Amxx:
} hwB>@r2
Wz-7oP%;I
/** -40OS=wpA
* @return Returns the content. D$/*Z5Z)]
*/ drEND`,@6|
publicList getContent(){ 4Q5c'
return content; mZb[Fi
} 6n5>{X
G,JK$j>*l
/** KvfZj
* @return Returns the page. X/-u$c
*/ wC4:OJ[d
public Page getPage(){ Tv`-h
return page; 7(<z= F
} 'k9dN
\ev
4>$weu^
/** :c^9\8S
* @param content ^VAvQ(b!:i
* The content to set. a<ztA:xt|1
*/ ( R0>0f@
public void setContent(List content){ >djTJ>dl_u
this.content = content; -+w^"RBV
}
wk (}q
r%^J3
/** s0bWg$
* @param page [!CIBK99
* The page to set. -)2sR>`A%
*/ =zXii{t
publicvoid setPage(Page page){ c<J/I_!
this.page = page; 4_B1qN
} T($6L7 j9
} iQnIk|8
% HK \
{Y#$
WPzq?yK
8>y!=+9_
2. 编写业务逻辑接口,并实现它(UserManager, ?E88y
_6,Tb]
UserManagerImpl) 9X6l`bo'
java代码: Jf|6 FQo&
eX9Hwq4X44
eaGd:(
/*Created on 2005-7-15*/ 5$C]$o}
package com.adt.service; M7 Z9(3Va
Q-,,Kn
import net.sf.hibernate.HibernateException; |rg4j
}3&~YBx;:
import org.flyware.util.page.Page; #0wH.\79
%Yi^{ZrM
import com.adt.bo.Result; pg;y\}
2|C(|fD4
/** "/MA.zEl0,
* @author Joa v1Wz#oP
*/ 16N+
publicinterface UserManager { WMw]W&
4`Z8EV
public Result listUser(Page page)throws |-SImxV
-B l!s^-'
HibernateException; 0cxk)l%
ejuw+@ _
} k_}aiHdG
Im* ~6[
Zg#VZg1
2
h72#AN
78[5@U
java代码: 0nbQKoF
*>,CG:`D
V<+=t{
/*Created on 2005-7-15*/ j~a"z4 0
package com.adt.service.impl; 6YCFSvA#/
k-uwK-B}v+
import java.util.List; rIg5Wcd
@h&crI[c
import net.sf.hibernate.HibernateException; ?UPZ49y
n,E=eNc
import org.flyware.util.page.Page; |VPJaiC~
import org.flyware.util.page.PageUtil; vS$_H<;P
Mx<?c
import com.adt.bo.Result; KS6H`Mm}/
import com.adt.dao.UserDAO; UD@u hL
import com.adt.exception.ObjectNotFoundException; c+^#(OB
import com.adt.service.UserManager; _CDl9pP36#
^bjaa
/**
=]auP{AlE
* @author Joa dmkd.aP4
*/ &S8Pnb)d
publicclass UserManagerImpl implements UserManager { zAxscDf'
}}g.L|
private UserDAO userDAO; V>YZ^>oeH
Ym WVb
/** Y,%d_yR[
* @param userDAO The userDAO to set. -!kfwJg8N(
*/ =h<LlI^v
publicvoid setUserDAO(UserDAO userDAO){ v_$'!i$
this.userDAO = userDAO; Gc'CS_L
} lW!}OzE(m
)O~V3a
/* (non-Javadoc) \z4I'"MC.9
* @see com.adt.service.UserManager#listUser @@O=a
#s-^4znv9
(org.flyware.util.page.Page) dD Zds
k+!
*/ HaUfTQ8
public Result listUser(Page page)throws d
Xiv8B1
xp4w9.X5(
HibernateException, ObjectNotFoundException { yl=_ /'*
int totalRecords = userDAO.getUserCount(); BV8-\R@
if(totalRecords == 0) ?1G7=R
throw new ObjectNotFoundException 79?%g=#=
EMV<PshW=
("userNotExist"); w!=Fi
page = PageUtil.createPage(page, totalRecords); p? dXs^ c
List users = userDAO.getUserByPage(page); *+-L`b{SX
returnnew Result(page, users); TC=djC4$/
} o?Wp[{K
h5:>o
} m\}8N
u
EP|OKXRltA
%L\buwjy$
*r&q;ER
},d`<^~
其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 XU3v#Du
=deqj^&@
询,接下来编写UserDAO的代码: 9<9 c^2
3. UserDAO 和 UserDAOImpl: Bj ~bsT@a.
java代码: uP:Y[$O
<#hltPyh
kbxy^4"X
/*Created on 2005-7-15*/ @LzqQ[
package com.adt.dao; ,.cNs5[t
WP@IV;i
import java.util.List; t#Q" ;e
.!kO2/:6
import org.flyware.util.page.Page; } +@H&}u
[`_ZlC
import net.sf.hibernate.HibernateException; JMUk=p<\
b* QRd
/** /%#LA
* @author Joa =`b/ip5
*/ 4rmSo^vK
publicinterface UserDAO extends BaseDAO { Gl1Qbd0
7.r}98V
publicList getUserByName(String name)throws Aj9Onz,Lg
: *~}\M*
HibernateException; 8+L,a_q-
wClX3l>y
publicint getUserCount()throws HibernateException; M%3 \]&
rl\$a2_+
publicList getUserByPage(Page page)throws [F^qa/vJ10
:`9hgd/9
HibernateException; [BH^SvE
jWg7RuN
} }SdI _sLe
g"60{
|HjoaN )
`ehZ(H}
-7^A_!.
java代码: :%!}%fkxH
jAa{;p"jU
q*Hf%I"
/*Created on 2005-7-15*/ w/L^w50pt
package com.adt.dao.impl; A?DgeSm
&nc0stuL
import java.util.List; cmzu
@zq
6O`s&T,t
import org.flyware.util.page.Page; D['z/r6F
SG&VZY
import net.sf.hibernate.HibernateException; y U-^w^4
import net.sf.hibernate.Query; |NbF3 fD
"funFvY
import com.adt.dao.UserDAO; 8$|<`:~J
WMo
/** &
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* @author Joa ]vyu!
*/ X`[P11`
public class UserDAOImpl extends BaseDAOHibernateImpl eb])=
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implements UserDAO { Y:~A-_
l1_Tr2A}7/
/* (non-Javadoc) UN~dzA~V
* @see com.adt.dao.UserDAO#getUserByName X>[x7t:
ZfpV=DU
(java.lang.String) x}g5
*/ ECO4ut.d
publicList getUserByName(String name)throws F/"Q0% (m
"Ih>>|r
HibernateException { V)$y
String querySentence = "FROM user in class re\@v8w~
LqH<HGMFD
com.adt.po.User WHERE user.name=:name"; 2k
}:)]m
Query query = getSession().createQuery ^4+ew>BLSv
;g3z?Uz)
(querySentence); d},IQ,Az:Z
query.setParameter("name", name); lZY0A#
return query.list(); AoaRlk-#
} E&\dr;{7
V~Zi #o
/* (non-Javadoc) ]x8_f6;D
* @see com.adt.dao.UserDAO#getUserCount() h,Y!d]2w
*/ Quc,,#u
publicint getUserCount()throws HibernateException { yGNZw7^(
int count = 0; uCc.dluU
String querySentence = "SELECT count(*) FROM di@4'$5#
\m3'4#
user in class com.adt.po.User"; rjmKe*_1V
Query query = getSession().createQuery y:U'3G-
WIytgM
(querySentence); -_m>C2$6x
count = ((Integer)query.iterate().next 6.o8vC/PZ
&GF|Rr8NXs
()).intValue(); b`NXe7A
return count; kOe%w-_
} +d[A'&"
*]ROUk@K=
/* (non-Javadoc) bv.DW,l%'
* @see com.adt.dao.UserDAO#getUserByPage Q?f%]uGFQ
}(g`l)OX
(org.flyware.util.page.Page) 1g_(xwUp+
*/ 6sRe. ct<