Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 }qg&2M%\
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 7va%-&.&t
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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 hCrgN?Mz
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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 k5/}S@F8
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分页支持类: *BV .zbGm
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java代码: qn .
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package com.javaeye.common.util; b~p <
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import java.util.List; f\JyN@w+
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publicclass PaginationSupport { uo^>95lkv
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publicfinalstaticint PAGESIZE = 30; s?G@k} {
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privateint pageSize = PAGESIZE; !
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privateList items; D'X'h}+2
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privateint totalCount; b({2|R
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privateint[] indexes = newint[0]; l40$}!!<
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privateint startIndex = 0; a;(:iMCi
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public PaginationSupport(List items, int j(SQNSFD
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totalCount){ R#t~i&v/
setPageSize(PAGESIZE); a36<S0R
setTotalCount(totalCount); :p{iBDA
setItems(items); .F]6uXd
setStartIndex(0); Vo\d&}Q
} gyPF!"!5dq
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public PaginationSupport(List items, int o)$sZ{` ="
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totalCount, int startIndex){ ?;$g, 2n
setPageSize(PAGESIZE); q*T+8O
setTotalCount(totalCount); ?vhW`LXNB
setItems(items); dO=<3W
setStartIndex(startIndex); 3RD Q{&J:
} + $M<ck?Bo
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public PaginationSupport(List items, int 1&h\\&ic
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totalCount, int pageSize, int startIndex){ hAgrs[OFj
setPageSize(pageSize); a"cw%L
setTotalCount(totalCount); E\2f"s
setItems(items); r{~b4~kAf5
setStartIndex(startIndex); [g==#[
} <}^p5|
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publicList getItems(){ J^WX^".E
return items; 6=%\@
} ;Zf7|i`R3
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publicvoid setItems(List items){ ,*[N_[
this.items = items; . Z`xNp
} &/Gf@[
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publicint getPageSize(){ }V/iU_)
return pageSize; H H3Z?g
} a U<+ `
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publicvoid setPageSize(int pageSize){ ra
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this.pageSize = pageSize; =q[+e(,3
} 6EY0Fjsi
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publicint getTotalCount(){ [pt U}
return totalCount; 5HB*
} \R
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publicvoid setTotalCount(int totalCount){ xyV7MW\?w
if(totalCount > 0){ WK#c* rsij
this.totalCount = totalCount; @]]\r.DG
int count = totalCount / VYK%0S9yH[
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pageSize; V\c`O
if(totalCount % pageSize > 0) l:a#B
count++; vgn,ZcX
indexes = newint[count]; do.XMdit
for(int i = 0; i < count; i++){ Qdy/KL1]
indexes = pageSize * fG@]G9Z
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} Lq#!}QcW=
}else{ }?CKE<#%
this.totalCount = 0; FZ FPzH
} Wq25, M'
} >+%0|6VSb
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publicint[] getIndexes(){ 2%-/}'G*
return indexes; ?%T]V+40
} ;|,*zD
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publicvoid setIndexes(int[] indexes){ EQy~ ^7V B
this.indexes = indexes; MdnapxuS
} %YG[?"P'
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publicint getStartIndex(){ K;R!>p}t
return startIndex; S<I9`k G
} t&o&gb
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publicvoid setStartIndex(int startIndex){ ^ b{~]I
if(totalCount <= 0) pWeD,!f
this.startIndex = 0; q^}iXE~
elseif(startIndex >= totalCount) @f#6Nu
this.startIndex = indexes X|Nb81M
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[indexes.length - 1]; AD7&-=p&w
elseif(startIndex < 0) <,t6A?YoMP
this.startIndex = 0; gZL,xX
else{ Cv<
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this.startIndex = indexes =pb ru=/
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[startIndex / pageSize]; I9sQPa
} T?*f}J
} >%c>R'~h
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publicint getNextIndex(){ `dgZ `#
int nextIndex = getStartIndex() + fy>~GFk(
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pageSize; &iaS3x
if(nextIndex >= totalCount) q]Af I(
return getStartIndex(); )D7/[zb^
else "8\2w]"
return nextIndex; V17!~
} ;y-sd?pAk
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publicint getPreviousIndex(){ E_#?;l>
int previousIndex = getStartIndex() - ZtX
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pageSize; ?:i,%]zxC
if(previousIndex < 0) ka*#O"}L8
return0; -7VQ{nC
else :c9 H2
return previousIndex; 5 i=C?W`'
} pzeCdHF
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} G
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抽象业务类 BCh|^Pk
java代码: +.QJZo_
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/** ~re~Ys
* Created on 2005-7-12 ?HeUU
*/ upGLZ#
package com.javaeye.common.business; b8glZb*$
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import java.io.Serializable; }d%Fl}.Ez
import java.util.List; Yh;A)Np
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import org.hibernate.Criteria; z#2n+hwE
import org.hibernate.HibernateException; S1U[{R?,
import org.hibernate.Session; pk0{*Z?@
import org.hibernate.criterion.DetachedCriteria; <jBRUa[j_
import org.hibernate.criterion.Projections; w8a49 Fv
import S q{@4F}d
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org.springframework.orm.hibernate3.HibernateCallback; &d\ y:7
import W:K '2j
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org.springframework.orm.hibernate3.support.HibernateDaoS [pInF
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upport; /i#";~sO
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import com.javaeye.common.util.PaginationSupport; ?$l|];m)-
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public abstract class AbstractManager extends W2'!Pc,W
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HibernateDaoSupport { P>(FCX
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privateboolean cacheQueries = false; ^b.#4i(v
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privateString queryCacheRegion; <_#2+7Qs
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publicvoid setCacheQueries(boolean h~ZLULW)B
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cacheQueries){ Nd&UWk^
this.cacheQueries = cacheQueries; EX#AJ>?V(
} k81%$E
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publicvoid setQueryCacheRegion(String eTuKu(0
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queryCacheRegion){ {Ay dt8
this.queryCacheRegion = ,~DV0#"
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queryCacheRegion; Rc
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} Pc2!OQC'""
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publicvoid save(finalObject entity){ Z&U:KrFH
getHibernateTemplate().save(entity); B(k tIy
} i;-M8Q^
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publicvoid persist(finalObject entity){ 1m#.f=u{R
getHibernateTemplate().save(entity); ixSr*+
} Gx6%Z$2n
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publicvoid update(finalObject entity){ ^
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getHibernateTemplate().update(entity); ],k~t5+
} 6 dV )pJd
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publicvoid delete(finalObject entity){ 9)NKI02M|
getHibernateTemplate().delete(entity); -z0;4O (K]
} `$S&:Q,
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publicObject load(finalClass entity, fBj)HoHQW
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finalSerializable id){ 5af0- hj
return getHibernateTemplate().load !*Eu(abD
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(entity, id); FK593z
} L*tfYonq
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publicObject get(finalClass entity, 8hD[z}
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finalSerializable id){ OtmDZ.t;`
return getHibernateTemplate().get #-<Go'yF
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(entity, id); V<W;[#"
} Xt<1b
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publicList findAll(finalClass entity){
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return getHibernateTemplate().find("from hdHz", )
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" + entity.getName()); >kK@tJn
} H3<tsK=:
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publicList findByNamedQuery(finalString g"1V]
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namedQuery){ uBx\xeI
return getHibernateTemplate N68$b#9Ry
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().findByNamedQuery(namedQuery); FL^ _)`
} `}l%61n0
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publicList findByNamedQuery(finalString query, f?Zjd&|Ch
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finalObject parameter){ $h{m")]
return getHibernateTemplate RTcxZ/\"#
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().findByNamedQuery(query, parameter); $lJcC |*
} k
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publicList findByNamedQuery(finalString query, g2|Myz)
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finalObject[] parameters){ B@&sG
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return getHibernateTemplate ?n`m
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().findByNamedQuery(query, parameters); #y:D{%Wp
} &L+uu',M0c
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publicList find(finalString query){ 5
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return getHibernateTemplate().find "#r)NYq`"|
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(query); T?pS2I~
} RhE~-b[X
lI=<lmM0|/
publicList find(finalString query, finalObject f,cd=vGj
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parameter){ QM0B6F
return getHibernateTemplate().find ZZT #V%Q=u
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(query, parameter); 7&ED>Bk
}
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public PaginationSupport findPageByCriteria 8z#Qp(he
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(final DetachedCriteria detachedCriteria){ S\A/*!%~y
return findPageByCriteria 7Z< ~{eD,
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(detachedCriteria, PaginationSupport.PAGESIZE, 0);
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} a `R%\@1
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public PaginationSupport findPageByCriteria [SPx
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(final DetachedCriteria detachedCriteria, finalint Nc:s+ o
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startIndex){ X;I9\Cp]!
return findPageByCriteria ~bLx2=-"
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(detachedCriteria, PaginationSupport.PAGESIZE, ]q]xU,
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startIndex); IO\4dU)
} mJSfn"b}K
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public PaginationSupport findPageByCriteria 6cH8Jr _
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(final DetachedCriteria detachedCriteria, finalint
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pageSize, .xRdKt!p
finalint startIndex){ /I%z7f91O
return(PaginationSupport) * ,hhX
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getHibernateTemplate().execute(new HibernateCallback(){ lzEynMO+
publicObject doInHibernate ZVjB$-do
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(Session session)throws HibernateException { M>AxVL
Criteria criteria = XNz+a|cF
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detachedCriteria.getExecutableCriteria(session); -#v~;Ci
int totalCount = I3t5S;_8
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((Integer) criteria.setProjection(Projections.rowCount }p)K6!J0
(80m'.X
()).uniqueResult()).intValue(); IG^@VQ%
criteria.setProjection ?
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}9fa]D-a?
(null); {r^_ g(.q
List items = g) X3:=['
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criteria.setFirstResult(startIndex).setMaxResults cAWn*%
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(pageSize).list(); - x
PaginationSupport ps = ai!u+L
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new PaginationSupport(items, totalCount, pageSize, <FT7QO$I
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startIndex); 2b"*~O;
return ps; F y+NJSG
} IskL$Y ^
}, true); &W<7!U:2m
} -Jd|H*wWo
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public List findAllByCriteria(final aKI"<%PNn
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DetachedCriteria detachedCriteria){ s(,S~
return(List) getHibernateTemplate ^FVdA1~/
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().execute(new HibernateCallback(){ :'%6
publicObject doInHibernate h]4xS?6O
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(Session session)throws HibernateException { -]N2V'QB
Criteria criteria = ~1G^IZ6
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detachedCriteria.getExecutableCriteria(session); I68u%fCv
return criteria.list(); THrLX;I
} MO`Y&<g~A
}, true); O
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} omG2p
}M07-qIX{
public int getCountByCriteria(final
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DetachedCriteria detachedCriteria){ v+ $3
Integer count = (Integer) 9b.
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getHibernateTemplate().execute(new HibernateCallback(){ ?t/qaUXN
publicObject doInHibernate =
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(Session session)throws HibernateException { 4^7 v@3
Criteria criteria = *D]:{#C*
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detachedCriteria.getExecutableCriteria(session); .S` q2C\
return 7[ ovEE54
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criteria.setProjection(Projections.rowCount *|rdR2R!
_){|/Zd
()).uniqueResult(); %ZVYgtk;*
} } z'Jsy[s
}, true); /T _M't@j
return count.intValue(); 1?'4%>kp
} @@Ib^sB%
} o "z()w~
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用户在web层构造查询条件detachedCriteria,和可选的 rto?*^N?
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 9<mMU:
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PaginationSupport的实例ps。 1RAkqw<E
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ps.getItems()得到已分页好的结果集 p6JTNxD
ps.getIndexes()得到分页索引的数组 W8W7<ml0A
ps.getTotalCount()得到总结果数 /-M:6
ps.getStartIndex()当前分页索引 !)a_@d.;i
ps.getNextIndex()下一页索引 :WB uU
ps.getPreviousIndex()上一页索引 4Kj.o
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 +n1!xv]
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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 a>j}@8[J
}geb959
一下代码重构了。 :8b'HhjM
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我把原本我的做法也提供出来供大家讨论吧: FC0fe_U(F
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首先,为了实现分页查询,我封装了一个Page类: Zc7;&cz
java代码: \%7*@&
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/*Created on 2005-4-14*/ 5kHaZ Q
package org.flyware.util.page; x/,;:S
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/** bO8 g#rO
* @author Joa :na9PW`TC
* %l(qyH)*
*/ |^[]Oy=
publicclass Page { d@<(Z7|
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/** imply if the page has previous page */ s{4|eYR
privateboolean hasPrePage; 3&^4%S{/
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/** imply if the page has next page */ PbvRh~n
privateboolean hasNextPage; E LZCrh6*
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/** the number of every page */ p%pM3<p
privateint everyPage; }RowAGWL
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/** the total page number */ q|;_G#4
privateint totalPage; {4SwCN /
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/** the number of current page */ * $~H=4t
privateint currentPage; kscZ
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/** the begin index of the records by the current QV,X> !Nz
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query */ , 7&`V=C
privateint beginIndex; h
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/** The default constructor */ $<cio
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public Page(){ g`I`q3EF)
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} 5G"LuA
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/** construct the page by everyPage *5?a%p
* @param everyPage &D0suK#
* */ *y<Ru:D
public Page(int everyPage){ D1]%2:
this.everyPage = everyPage; B7BXS*_b
} G8b/eWtP
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/** The whole constructor */ VtIPw&KHW
public Page(boolean hasPrePage, boolean hasNextPage, tl9=u-D13@
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int everyPage, int totalPage, 7fRL'I#[@
int currentPage, int beginIndex){ hd{Vz{;W
this.hasPrePage = hasPrePage; Hbwjs?Vq?]
this.hasNextPage = hasNextPage; >`L)E,=/
this.everyPage = everyPage; \)Jv4U\;
this.totalPage = totalPage; rw_T&>!
this.currentPage = currentPage; hpp>+=
this.beginIndex = beginIndex; 0s )B~
} EXn$ [K;
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/** %SORs(4
* @return y\0<f `v6
* Returns the beginIndex. u=^0n2ez
*/ 3l5rUjRwj
publicint getBeginIndex(){ Bfhw0v]Z
return beginIndex; 2B&Yw
} 2_Me
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/** ~@a7RiE@
* @param beginIndex 2}`Q9?
* The beginIndex to set. 2y;
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*/ G#n99X@-
publicvoid setBeginIndex(int beginIndex){ k1;,eB
this.beginIndex = beginIndex; ,Nl]rmI
} CORX .PQ
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/** -f?Rr:#
* @return [{3WHS.
* Returns the currentPage. pAg;Rib
*/ 7O5`&Z'-
publicint getCurrentPage(){ EN@LB2
return currentPage; rhFa rm4a
} '>FJk`iI
!fdni}f)
/** QrDrdA
* @param currentPage L^PZ\OC
* The currentPage to set. 5vIuH+0
*/ wd*i&ooQ*L
publicvoid setCurrentPage(int currentPage){ rC] jz$sle
this.currentPage = currentPage; .K^'Q|?
} Y+N^_2@+C
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/** F=
* @return U@[P.y~J
* Returns the everyPage. &rj6<b1A
*/ M"F?'zTkJ
publicint getEveryPage(){ *|AnL}GJ
return everyPage; AG)N^yd
} R7T"fN
;}IF'ANA
/** oMda)5 &
* @param everyPage sw*k(i
* The everyPage to set. Y%qhgzz?/
*/ FsZM_0>/s
publicvoid setEveryPage(int everyPage){ *sf9(%j
this.everyPage = everyPage; U0u @[9!
} 4,f[D9|:
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/** Q3%a=ba)h
* @return dv4)fG]W;_
* Returns the hasNextPage. O89<IXk
*/ `{I,!to
publicboolean getHasNextPage(){ R#tz"T@
return hasNextPage; hX)r%v:
} uW;Uq=UN
F~a5yW:R=)
/** W_8FzXA
* @param hasNextPage F-k1yZ?^
* The hasNextPage to set. V]H<:UE
*/ _KmpC>J+
publicvoid setHasNextPage(boolean hasNextPage){ ~'fa,XZ<
this.hasNextPage = hasNextPage; {z@vSQ=)=P
} ] >ipC,v
hv*n";V
/** 4)2*|w
* @return PyYKeo=
* Returns the hasPrePage. qCgP8U/jv
*/ cdU2ph_
publicboolean getHasPrePage(){ 3}g?d/^E3
return hasPrePage; `k\]I |6
} w])~m1yW
r\],5x'xSu
/** eV9:AN }K=
* @param hasPrePage .U5+PQN
* The hasPrePage to set. G&C)`};
*/ e7#=F6
publicvoid setHasPrePage(boolean hasPrePage){ QH\*l~;B\
this.hasPrePage = hasPrePage; " "a+Nc
} ,eUMSg~P.7
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/** "r"]NyM
* @return Returns the totalPage. t1C{
* "6KOql3
*/ P#ru-0DD
publicint getTotalPage(){ K&|zWpb
return totalPage; ;;nmF#
} n+uq|sYVa
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/** /-|xxy
* @param totalPage r456M-~
* The totalPage to set. H50nR$$<*Y
*/ ;4qalxzu
publicvoid setTotalPage(int totalPage){ tQFFt,)
this.totalPage = totalPage; :He:Bdk
} r1?LKoJOn
?,%N?
} ^Ws~h\{%
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上面的这个Page类对象只是一个完整的Page描述,接下来我写了一 wK\SeX
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个PageUtil,负责对Page对象进行构造: 15s?QSKj
java代码: %##9.Xm6l
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/*Created on 2005-4-14*/ ;zJ_apZ:{
package org.flyware.util.page; Xs?>6i@$$
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import org.apache.commons.logging.Log; d*AV(g#B
import org.apache.commons.logging.LogFactory; EwOTG
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/** q{5Vq_s\
* @author Joa 2'}2r ~6
* oz0-'_
*/ 6/n;u{|
publicclass PageUtil { ){(cRB $
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privatestaticfinal Log logger = LogFactory.getLog 0ib 6}L%
\C6m.%%={R
(PageUtil.class); vaU7tJ:
o._^
/** 'qD9kJ`
* Use the origin page to create a new page \G"/Myi
* @param page FG(`&S+,
* @param totalRecords <;T7qEIlo
* @return =0-qBodbl
*/ EtcamI*`
publicstatic Page createPage(Page page, int ";xEuX
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totalRecords){ 0jS/U|0
return createPage(page.getEveryPage(), @rF\6I
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page.getCurrentPage(), totalRecords); \X`P
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} ;wF|.^_2
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/** s [!SG`&
* the basic page utils not including exception ",+uvJT1O
i@6
/#
handler %xruPWT:k
* @param everyPage ;0*^9 8K
* @param currentPage 4s8E:I=K
* @param totalRecords oGqv,[$qN
* @return page "10VN*)J}
*/ L_r &'B
publicstatic Page createPage(int everyPage, int {P5@2u6S
:&%;s*-9
currentPage, int totalRecords){ O+$70
everyPage = getEveryPage(everyPage); 1sJN^BvuG
currentPage = getCurrentPage(currentPage); !O-+h0Z
int beginIndex = getBeginIndex(everyPage, 7y\g~?5N
EHHxCq?
currentPage); yDC97#%3u
int totalPage = getTotalPage(everyPage, aiHr2x6
R'/wOE2
totalRecords); WdAGZUp
boolean hasNextPage = hasNextPage(currentPage, ;`B35K
ar|[D7Xrq\
totalPage); "BRE0Ir:
boolean hasPrePage = hasPrePage(currentPage); {1%ZyY
3c3Z"JV
returnnew Page(hasPrePage, hasNextPage, N 3c*S"1
everyPage, totalPage, obq}#
currentPage, -#6*T,f0P(
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beginIndex); @45 H8|:k
} ~S6 {VK.
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privatestaticint getEveryPage(int everyPage){ ?m1$*j
return everyPage == 0 ? 10 : everyPage; PNgMLQI6
} E+zn\v
!@{[I:5
privatestaticint getCurrentPage(int currentPage){ &|'6-wD.
return currentPage == 0 ? 1 : currentPage; Ba0D"2CgY
} E{s|#
AFTed?(
privatestaticint getBeginIndex(int everyPage, int vs|6ww
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currentPage){ i(;-n_:,`
return(currentPage - 1) * everyPage; ~iZF~PQ1_
} (H+[ ^(3d2
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privatestaticint getTotalPage(int everyPage, int OeGuq.>w
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totalRecords){ X-#mv|3
int totalPage = 0; lMez!qx,=
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if(totalRecords % everyPage == 0) ;}~Bv<#
totalPage = totalRecords / everyPage; kZ-~
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else G@EjWZQ
totalPage = totalRecords / everyPage + 1 ; Y0O<]2yVx
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return totalPage; 14 'x-w^~k
} KH>sCEt
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privatestaticboolean hasPrePage(int currentPage){ -!G#")<
return currentPage == 1 ? false : true; `AHNk7 t=
} k`mrRs
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privatestaticboolean hasNextPage(int currentPage, '3UIriY6
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int totalPage){ N|d.!Q;V.y
return currentPage == totalPage || totalPage == ZX6=D>)u
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0 ? false : true; 1qKxg
} _<F@(M5
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} M(WOxZ8
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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。 >`?+FDOJ,
h:Mn$VR,
面对一个具体的业务逻辑:分页查询出User,每页10个结果。具体 e9hVX[uq
}Oh'YX#[
做法如下: nP{sCH 1
1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 Iam-'S5
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的信息,和一个结果集List: yZ~eLWz
java代码: [FV=@NI
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/*Created on 2005-6-13*/ UFIAgNKl
package com.adt.bo; sHPwW5j/o'
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import java.util.List;
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import org.flyware.util.page.Page; #9hXZr/8
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/** +?5Uy*$
* @author Joa ND55`KT4
*/ l;{N/cS
publicclass Result {
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private Page page; j
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private List content; peTO-x^a-
2) /k`Na
/** %X9:R'~ sP
* The default constructor fdq^!MWTi
*/ |!xfIR>=F
public Result(){ i^s`6:rNu
super(); 32bkouq
} +.gf]|
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/** @^:7UI_
* The constructor using fields L`HH);Ozw
* sx-Hw4.a"
* @param page 94'k7_q
* @param content An8%7xa7
*/ 0,~6TV<K
public Result(Page page, List content){ n$OE~YwP{
this.page = page; %g]$Vfpy
this.content = content; _86*.3fQG
} ,yM}]pwlB
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/** P+;CE|J`X
* @return Returns the content. *b6I%MZn
*/ M8#*zCp{5
publicList getContent(){ Hlt8al3
return content; rt 3f7 s*
} \&\_>X.,
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/** )O2Nlk~l&
* @return Returns the page. t> x-1vf%
*/ ElEv(>G*
public Page getPage(){ fd5ZaE#f
return page; /slm
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} QX/X {h6
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/** JGk3b=K
* @param content &*G5J7%w
* The content to set. (
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*/ u{OS6Ky
public void setContent(List content){ LC,*H0
this.content = content; 0|fb< "
} W.#}qK"
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/** 5|<yfk8*J
* @param page u0bfX,e2U
* The page to set. c-4m8Kg?L
*/ 3d*&':
publicvoid setPage(Page page){ .N~PHyXZR
this.page = page; D00G1:Ft(T
} aN^]bs?R
} e/"yGQu
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/9x{^
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2. 编写业务逻辑接口,并实现它(UserManager, @4IW=V
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UserManagerImpl) 0bMoUy*q
java代码: !c3```*
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/*Created on 2005-7-15*/ sx22|j`)V
package com.adt.service; A3Su&0uaB
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import net.sf.hibernate.HibernateException; U*-%V$3+w5
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import org.flyware.util.page.Page; z.QW*rW9
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import com.adt.bo.Result; NWKD:{
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/** !XK p_v
* @author Joa >9|Q,/b0
*/ Ar|_UV>Zf
publicinterface UserManager { v'|Dj^3[
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public Result listUser(Page page)throws il:+O08_
9{+B lNZ
HibernateException; f1Rm9``
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} `/0FXb
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java代码: [~$9n_O94
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/*Created on 2005-7-15*/ v\Q${6kEtx
package com.adt.service.impl; Qp{{OjD
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import java.util.List; 94H 6`
1XwbsKQ}
import net.sf.hibernate.HibernateException; iQ:]1H s
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import org.flyware.util.page.Page; EFV'hMjS)
import org.flyware.util.page.PageUtil; o4tQ9X=}
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import com.adt.bo.Result; )~rN{W<s`H
import com.adt.dao.UserDAO; )|3?7?X
import com.adt.exception.ObjectNotFoundException; |]^OX$d
import com.adt.service.UserManager; MH1??vW
98G>I(Cw%
/** C}#JvNyQ
* @author Joa /z`LB
*/ Q
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publicclass UserManagerImpl implements UserManager { Wcw$
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private UserDAO userDAO; 7@5}WNr
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/** )y_MI
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* @param userDAO The userDAO to set. Ac|IBXGa=
*/ t*~V]wZ
publicvoid setUserDAO(UserDAO userDAO){ o{lR_
this.userDAO = userDAO; d A[I
} `VwZDU~6
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/* (non-Javadoc) GeD^-.^
* @see com.adt.service.UserManager#listUser wHvX|GwMv
L
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(org.flyware.util.page.Page) ZXh6Se4o
*/ {rBS52,Z#
public Result listUser(Page page)throws ~A(fn:d
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HibernateException, ObjectNotFoundException { 9s7sn*aB#5
int totalRecords = userDAO.getUserCount(); 2r]80sWY
if(totalRecords == 0) U@Y0 z.Y
throw new ObjectNotFoundException ~*@UQ9*p#
by (xv0v;
("userNotExist"); q ^Un,h64t
page = PageUtil.createPage(page, totalRecords); pqmtN*zV
List users = userDAO.getUserByPage(page); y yW;VKN
returnnew Result(page, users); Y92wL}
} \]1qAFB5
|
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} SvLI%>B=9
#?DwOUw
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i=jwk_y
其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 dZK/v
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询,接下来编写UserDAO的代码: wc`UcGO
3. UserDAO 和 UserDAOImpl: wVX]"o
java代码: H0r@dn
jfF
3 }~.#`QeY
/*Created on 2005-7-15*/ 5+Fr/C
package com.adt.dao; .5*5S[
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%
import java.util.List; /enlkZx=8
A:!_ &