Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 kBS;SDl)
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 2+s_*zM-
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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 sbjAZzrX2i
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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 \j+O |#`|)
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分页支持类: /!=uM.
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java代码: }/nbv;)
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package com.javaeye.common.util; rjo/-910
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import java.util.List; {0nZ;1,m
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publicclass PaginationSupport { WS/^WxRY
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publicfinalstaticint PAGESIZE = 30; `MAee8u'
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privateint pageSize = PAGESIZE; OL4I}^*,
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privateList items; vIF=kKl9,
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privateint totalCount; peCmb)>Sa
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privateint[] indexes = newint[0]; x#-uf
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privateint startIndex = 0; Zf68EB
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public PaginationSupport(List items, int 3~z4#8=
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totalCount){ g0v},n
setPageSize(PAGESIZE); }`8g0DPuD9
setTotalCount(totalCount); PVP,2Yq!
setItems(items); 5cO}Jp%PA
setStartIndex(0); ^m;dEe&@F
} ,],"tzKtE
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public PaginationSupport(List items, int {_0Efc=7
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totalCount, int startIndex){ ] e!CH
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setPageSize(PAGESIZE); (f#QETiV
setTotalCount(totalCount); "D}PbT[V
setItems(items); /d=i0E3
setStartIndex(startIndex); DQ :w9
} S+3'C
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public PaginationSupport(List items, int u*B.<GmN
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totalCount, int pageSize, int startIndex){ Genk YtS
setPageSize(pageSize); iDt^4=`
setTotalCount(totalCount); 9r-]@6;
setItems(items); !4GGq
setStartIndex(startIndex); F(>']D9$.
} #/$}zl
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publicList getItems(){ AVVL]9b_2
return items; 4 d4le
} ^wPKqu)^
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publicvoid setItems(List items){ Q}FDu,
this.items = items; O( G|fs
} :#0uy1h
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publicint getPageSize(){ NsJt=~
return pageSize; xnmIo?
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} I'2:>44>I6
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publicvoid setPageSize(int pageSize){ :LBG6J
this.pageSize = pageSize; LWHP31{R
} })!d4EcZf
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publicint getTotalCount(){ %[\:
8
return totalCount; s:lar4>kM
} F+,X%$A#?
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publicvoid setTotalCount(int totalCount){ TJ[C,ic=D
if(totalCount > 0){ vzJ69%E_
this.totalCount = totalCount; *#1&IJPI
int count = totalCount / 4v9zFJ<Z
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pageSize; V2sWcV?
if(totalCount % pageSize > 0) ZOc1 vj
count++; _=E))Kp{z
indexes = newint[count]; 3{RuR+yi
for(int i = 0; i < count; i++){ "}Kvx{L8
indexes = pageSize * GdG1e%y]z
*F* c
i; B3K!>lz
} qKt8sxg
}else{ P7QOlTQI
this.totalCount = 0; C\Q3vG
} r@FdxsCnGM
} Mf7Q+_!
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publicint[] getIndexes(){ {PgB~|W
return indexes; 3Yf%M66t
} @3KVYv,q
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publicvoid setIndexes(int[] indexes){ ta"/R@ k*
this.indexes = indexes; HmKvu"3
} B04%4N.g"X
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publicint getStartIndex(){ *%1:="W*|
return startIndex; UfjLNe}wA
} 9|WBJ6
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publicvoid setStartIndex(int startIndex){ -
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if(totalCount <= 0) 6la# 0U23
this.startIndex = 0; %y.9S=,v,
elseif(startIndex >= totalCount) p 7IJ3YY
this.startIndex = indexes %AW5\ EX
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[indexes.length - 1]; Je_Hj9#M\d
elseif(startIndex < 0) kwNXKn/
this.startIndex = 0; xb\(>7M6Y
else{ !iUdej^tx
this.startIndex = indexes c\FyX\i
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[startIndex / pageSize]; *-$u\?$
} VaC#9Tp2X
} xn)FE4
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publicint getNextIndex(){ PbxuD*LQ.
int nextIndex = getStartIndex() + *V#v6r7<Y/
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pageSize; ^(m`5]qr7J
if(nextIndex >= totalCount) 9\3% 5B7
return getStartIndex(); @z"Zj 3ti
else !+& NG&1
return nextIndex; &b,.W;+
} .vNfbYH(
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publicint getPreviousIndex(){ }<7Dyn,
int previousIndex = getStartIndex() - ac>}$Uw)
s([9/ED
pageSize; mXlXB#N
if(previousIndex < 0) ]W<E#^
return0; ]*j>yj.Y'~
else //@_`.
return previousIndex; -aG( Yx
} F3jrJ+nJ
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} B)
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抽象业务类 wJ!
java代码: 9F0B-aZ
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/** oV?tp4&
* Created on 2005-7-12 mhJ>5z
*/ ]]o7ej
package com.javaeye.common.business; #[sC H
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import java.io.Serializable; ]@l~z0^|[_
import java.util.List; H(Mlf
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import org.hibernate.Criteria; xp/u, q
import org.hibernate.HibernateException; 0LoA-c<Ay
import org.hibernate.Session; C JiMg'K
import org.hibernate.criterion.DetachedCriteria; v|_?qBs"
import org.hibernate.criterion.Projections; lO%Z4V_Mj
import WP32t@
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org.springframework.orm.hibernate3.HibernateCallback; ,!kyrk6
import ec1snMY
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org.springframework.orm.hibernate3.support.HibernateDaoS ( NjX?^
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upport; %P_\7YBC>
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import com.javaeye.common.util.PaginationSupport; <WaiJy?
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public abstract class AbstractManager extends po=*%Zs*T
tl ;?/
HibernateDaoSupport { K!|=)G3.`
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privateboolean cacheQueries = false; a9QaF s"
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privateString queryCacheRegion; t8GJ;
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publicvoid setCacheQueries(boolean m>:%[vm
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cacheQueries){ Vz 5:73
this.cacheQueries = cacheQueries; 51x^gX|
} UeHS4cW
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publicvoid setQueryCacheRegion(String dUb(C1h
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queryCacheRegion){ ]-x#zp;=
this.queryCacheRegion = /unOZVr(
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queryCacheRegion; d/t'N-m
} 5R"b1
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publicvoid save(finalObject entity){ ^~BJu#uVyy
getHibernateTemplate().save(entity); NLz$jk%=g
} Pv1psKu
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publicvoid persist(finalObject entity){ r`<evwIe
getHibernateTemplate().save(entity); <V6#)^Or
} +nJ}+|@K
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publicvoid update(finalObject entity){ ;"Ot\:0
getHibernateTemplate().update(entity); zv0RrF^
} {'!D2y.7g
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publicvoid delete(finalObject entity){ ~MhPzu&B
getHibernateTemplate().delete(entity); 8L=QfKr
} v(: VUo]H
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publicObject load(finalClass entity, `Z@wWs
Ix *KL=MG
finalSerializable id){ 2>EIDRLJ-
return getHibernateTemplate().load AOWI`
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(entity, id); P?0b-Qr$a
} H/, tE0ZV
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publicObject get(finalClass entity, 6@I7UL >
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finalSerializable id){ e.HN%LrhS
return getHibernateTemplate().get a:;*"p[R
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(entity, id); 8F[j}.8q
} 2j"%}&
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publicList findAll(finalClass entity){ s-C.+9
return getHibernateTemplate().find("from =
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" + entity.getName()); F2:7UNy,
} jr9ZRHCU
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publicList findByNamedQuery(finalString M"_XaVl
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namedQuery){ !tbRqW6v
return getHibernateTemplate u>(Q& 25
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().findByNamedQuery(namedQuery); l+N?:E$5=%
} ? {l2
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publicList findByNamedQuery(finalString query, 1L9^N
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finalObject parameter){ =~arj
return getHibernateTemplate \E#r[9F{
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().findByNamedQuery(query, parameter); vc!S{4bN
} L;`4"
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publicList findByNamedQuery(finalString query, z44uhR h
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finalObject[] parameters){ L;f=\q"g
return getHibernateTemplate E8j9@BHU[r
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().findByNamedQuery(query, parameters); yf8UfB#a
} sXydMk`J
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publicList find(finalString query){ a-}%R
return getHibernateTemplate().find >3kR~:;
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(query); @t2 Q5c
} k}O|4*.BT
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publicList find(finalString query, finalObject (Q4_3<G+
q+:(@w6
parameter){ g SwG=e\
return getHibernateTemplate().find c,-x}i0c
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(query, parameter); "p;DQ-V
} ,mX|TI<*
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public PaginationSupport findPageByCriteria c%U$qao=c+
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(final DetachedCriteria detachedCriteria){ .;F+ QP0
return findPageByCriteria EGDE4n5>I
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); UxvsSHi
} 3D.S[^s*
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public PaginationSupport findPageByCriteria [.I,B tY+
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(final DetachedCriteria detachedCriteria, finalint ICTtubjV"
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startIndex){ &Kve vPF
return findPageByCriteria Y) h%<J
'f}S,i +q
(detachedCriteria, PaginationSupport.PAGESIZE, 0;H6b=
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startIndex); uy9B8&Sr
} 55cldo
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public PaginationSupport findPageByCriteria &0eB@8{N
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(final DetachedCriteria detachedCriteria, finalint t(Zs*c(
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pageSize, 5Hm!5:ZB
finalint startIndex){
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return(PaginationSupport) |Hm'.-
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getHibernateTemplate().execute(new HibernateCallback(){ >h[!gXL^
publicObject doInHibernate i@CMPz-h&
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(Session session)throws HibernateException { &o/4hnHYt
Criteria criteria = U&n>fXTHn
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detachedCriteria.getExecutableCriteria(session); ^!<7#kX
int totalCount = G; [AQ:Iy
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((Integer) criteria.setProjection(Projections.rowCount 6{$dFwl
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()).uniqueResult()).intValue(); 8-"5|pNc
criteria.setProjection y,&M\3A
{~t4
(null); )h0E$*
List items = Z&w^9;30P
uK:-g,;
criteria.setFirstResult(startIndex).setMaxResults (<3lo
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(pageSize).list(); n6-Ic',;
PaginationSupport ps = b'1d<sD
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new PaginationSupport(items, totalCount, pageSize, m_$I?F0
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startIndex); GWInN8.5
return ps; bez'[Y{
} #a | ch6B
}, true); )SX6)__
} 7vaN&%;E%
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public List findAllByCriteria(final ^dnz=FB
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DetachedCriteria detachedCriteria){ S[~O')
return(List) getHibernateTemplate *fl{Y(_OO
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().execute(new HibernateCallback(){ WYC1rfd=
publicObject doInHibernate 'n[+r}3
@ 9 {%Kn
(Session session)throws HibernateException { >_`D3@Rz
Criteria criteria = ^Y7 /Ow
E ;!<Z4
detachedCriteria.getExecutableCriteria(session); ZjZh z`
return criteria.list(); #t@x6Vt
} i.t9jN
}, true); >4/L-y+
} x$n~f:1Y
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public int getCountByCriteria(final V(2,\+ t
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DetachedCriteria detachedCriteria){ *NW QmC~
Integer count = (Integer) z,bX.*.-
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getHibernateTemplate().execute(new HibernateCallback(){ /S]:dDY9K
publicObject doInHibernate 4Oy.,MDQP
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(Session session)throws HibernateException { rg5]`-!=
Criteria criteria = r]8x;v1
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detachedCriteria.getExecutableCriteria(session); 1BMB?I
return `z}vONXpAX
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criteria.setProjection(Projections.rowCount +YkW[a\4
f6B-~x<l
()).uniqueResult(); vm\wO._
} xHJ8?bD p
}, true); 3vdu;W=Sz
return count.intValue(); heL$2dZ5H
} I vTzPPP
} S jVsF1d_
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用户在web层构造查询条件detachedCriteria,和可选的 XM6".eF)M
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 d4Co^A&
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PaginationSupport的实例ps。 zoZ<)x=;
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ps.getItems()得到已分页好的结果集 ~;M)qR?]W
ps.getIndexes()得到分页索引的数组 E X%6''ys
ps.getTotalCount()得到总结果数 d/D,P=j"
ps.getStartIndex()当前分页索引 ;,1=zhKU.
ps.getNextIndex()下一页索引 48 W.qzC
ps.getPreviousIndex()上一页索引 f64(a\Rw!^
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 e`i7ah;
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,尤其是上面的示例代码,让我着实觉得该对我原来的分页查询做 !z11"
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一下代码重构了。 fUC9-?(K
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我把原本我的做法也提供出来供大家讨论吧: CuH2E>wz
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首先,为了实现分页查询,我封装了一个Page类: 9O;cJ)tXY
java代码: V=pMq?Nr
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/*Created on 2005-4-14*/ %Y~>Jl
package org.flyware.util.page; Xka<I3UD5
&59F8JgJ
/** HcRa`Sfc]/
* @author Joa 5%*w<6<_z
* /<);=&[
*/ ,CP5~4u
publicclass Page { (n,u|}8Y
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/** imply if the page has previous page */ 3jjMY
privateboolean hasPrePage; =;0wFwSz
vw2`:]Q+
/** imply if the page has next page */ ~#R9i^Y
privateboolean hasNextPage; x2co>.i
NzQ9Z1Mxy
/** the number of every page */ H{l)
privateint everyPage; #B8*gFZB
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/** the total page number */ (hIF]>,kl
privateint totalPage; G8nrdN-9
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/** the number of current page */ ';0 qj$#
privateint currentPage; O*[{z)M.
k|xtrW`qo;
/** the begin index of the records by the current L*h{'<Bz
*wuqa)q2
query */ %f j+70
privateint beginIndex; -&|:0#@P
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/** The default constructor */ K{@3\5<
public Page(){
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} uI~s8{0T6
6sJw@OaJ
/** construct the page by everyPage D f4+^B,1
* @param everyPage 4[yIOs
* */ lhH`dG D
public Page(int everyPage){ n(1')?"mA
this.everyPage = everyPage; MZV_5i@:
} mj&57D\fq
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/** The whole constructor */ .pPm~2]z
public Page(boolean hasPrePage, boolean hasNextPage, 26 I
ht =P\E
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int everyPage, int totalPage, 7j$Pt8$
int currentPage, int beginIndex){ ~YP Jez
this.hasPrePage = hasPrePage; WOLuw%
this.hasNextPage = hasNextPage; N~^yL <O
this.everyPage = everyPage; +k\Uf*wh
this.totalPage = totalPage; HOoPrB m
this.currentPage = currentPage; q[3x2sR
this.beginIndex = beginIndex; WIr2{+#
} j}1zdA
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/** |4(~%| 8{
* @return 7F^#o-@=J
* Returns the beginIndex. y [#pC<^
*/ $e1=xSQp4
publicint getBeginIndex(){ ;5_{MCPM
return beginIndex; t5B7I59
} =( v^5
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/** #[{3} %b
* @param beginIndex QaIjLc~W
* The beginIndex to set. *N'K/36;
*/ $
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publicvoid setBeginIndex(int beginIndex){ cD*}..-/4
this.beginIndex = beginIndex; x5}'7,A
} %`MQmXgM
ldha|s.*
/** IW=cym7
* @return te|?)j
* Returns the currentPage. r3E!dTDWq
*/ !p TJ./
publicint getCurrentPage(){ YB<*"HxM)}
return currentPage; {S/yL[S.
} "@R>J?Cc+
C%d_@*82
/** }KUd7[s
* @param currentPage Od+6 -J
* The currentPage to set. q<y#pL=k"*
*/ ]i(-I <`
publicvoid setCurrentPage(int currentPage){ m>USD?i
this.currentPage = currentPage; *IgE)N>
} **9x?s
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/** :B3[:MpL}
* @return Q!-
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* Returns the everyPage. *eI)Z=8
*/ Lbe\@S
publicint getEveryPage(){ ;g{qYj_
return everyPage; T134ZXqqz
} mxor1P#|
infl.
/** ?
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* @param everyPage SJD@&m%?[
* The everyPage to set. afjtn_IB
*/ 3bO(?l`3h
publicvoid setEveryPage(int everyPage){ HhO".GA
this.everyPage = everyPage; J>fQNW!{
} 4iSa7YqhBT
c/c$D;T
/** N0hE4t
* @return R$; n)_H
* Returns the hasNextPage. d%l{V6
*/ dJ"iEb|4
publicboolean getHasNextPage(){ s4&^D<
return hasNextPage; vJAZ%aW
} z-M3
fw ,\DFHO
/** [+O"<Ua
* @param hasNextPage Y*mbjyt[?X
* The hasNextPage to set. v<Bynd-
*/ t_mIOm)S%
publicvoid setHasNextPage(boolean hasNextPage){ ^vG8#A}]
this.hasNextPage = hasNextPage; lu Q~YjH
} ~]ZpA-*@Ut
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/** k,euhA/&
* @return apE
* Returns the hasPrePage. kdGT{2u
*/ NcY608C
publicboolean getHasPrePage(){
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return hasPrePage; 6 uKTGc4
} K~ ;45Z2
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/** q^6 +!&"
* @param hasPrePage Ef<b~E@
* The hasPrePage to set. *)+ut(x|#
*/ DY[$"8Kxcp
publicvoid setHasPrePage(boolean hasPrePage){ 7FRmx4(!
this.hasPrePage = hasPrePage; .*elggM
} *L!!]Q2c
]9\!;Bz^J
/** >}(CEzc8
* @return Returns the totalPage. |HZTN"
* #A]-ax?Qc}
*/ EI\9_}@,
publicint getTotalPage(){ y\&>ZyOY
return totalPage; G7D2{J{1
} L/"0ws_
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/** ,m,)I
* @param totalPage ?&Pg2]g<
* The totalPage to set. P6MRd/y |
*/ xU%w=0z<
publicvoid setTotalPage(int totalPage){ ^{8Gt@
this.totalPage = totalPage; je]}R>[r5
} 1h.)#g?{
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} ^FnfJ:
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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 IEyL];K
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个PageUtil,负责对Page对象进行构造: [V}S<Xp
java代码: v(pmIb{
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/*Created on 2005-4-14*/ pC_O:f>vJ
package org.flyware.util.page; aH#l9kCb
u a\,->
import org.apache.commons.logging.Log; +&["HoKg}&
import org.apache.commons.logging.LogFactory; not YeY7wR
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/** pFJB'=c
* @author Joa 8|$3OVS
* Bphof0{<}
*/ T,$WlK
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publicclass PageUtil { &hk-1y9QS
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privatestaticfinal Log logger = LogFactory.getLog $U/YR&vcw
z.}[m,oTF
(PageUtil.class); ~/_SMPLo
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/** %E_b'[8
* Use the origin page to create a new page 5 QO34t2
* @param page P bQk<"J1
* @param totalRecords N;+[`l
* @return > ,DbNmi
*/ m RZ:ie
publicstatic Page createPage(Page page, int =V^.}WtO
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totalRecords){ \.g\Zib )
return createPage(page.getEveryPage(), bz|
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page.getCurrentPage(), totalRecords); x\Y $+A,P
} }=!,o
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/** ,$eK-w
* the basic page utils not including exception BAO| )~1Pd
l
(3bW1{n
handler x1ztfJd
* @param everyPage HfLLlH<L`&
* @param currentPage p7H3J?`w1+
* @param totalRecords pc?>cs8
* @return page PpsIhMq@
*/ ci+tdMA
publicstatic Page createPage(int everyPage, int C4NTh}6tT
/>j';6vi
currentPage, int totalRecords){ Ks\ NE=;5
everyPage = getEveryPage(everyPage); > 0<)=
currentPage = getCurrentPage(currentPage); hTbI -u7BF
int beginIndex = getBeginIndex(everyPage, ?,yj")+
(mlzg=szW
currentPage); # M!!CX*k
int totalPage = getTotalPage(everyPage, 1[]&(Pa
FCkf#
totalRecords); A0%}v*
boolean hasNextPage = hasNextPage(currentPage, -)~SM&
+S))3 5N[
totalPage); _`#3f1F@[
boolean hasPrePage = hasPrePage(currentPage); D13Rx 6b
^V%rag
returnnew Page(hasPrePage, hasNextPage, q:<{% U$
everyPage, totalPage, 4Bl{WyMJ |
currentPage, ]!IVz)<E&
?3O9eZY@
beginIndex); )Af~B'OUd
} (|d34DOJ
&gI ~LP
privatestaticint getEveryPage(int everyPage){ #6!5 2
return everyPage == 0 ? 10 : everyPage; vF?5].T
} 0 P[RyQI
3~#h|?
privatestaticint getCurrentPage(int currentPage){ *9p |HX=
return currentPage == 0 ? 1 : currentPage; .SWt3|Pi5
} nhN);R~o"1
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)}
privatestaticint getBeginIndex(int everyPage, int eh[_~>w
phE
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currentPage){ ,TRTRb;
return(currentPage - 1) * everyPage; "@9?QI}
} ejA%%5q
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privatestaticint getTotalPage(int everyPage, int xm6 EKp:
r&Ca"dI
totalRecords){ hd 0'u
int totalPage = 0; `HuCT6O
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if(totalRecords % everyPage == 0) rDdzxrKg{
totalPage = totalRecords / everyPage; 'q * Bdx
else ]m#5`zGK1|
totalPage = totalRecords / everyPage + 1 ; JH7Ad (:
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return totalPage; L>Mpi$L
} K 0hu:1l)
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privatestaticboolean hasPrePage(int currentPage){ VB<Jf'NU
return currentPage == 1 ? false : true; P_u|-~|\
} it2 a
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privatestaticboolean hasNextPage(int currentPage, kbPE "urR
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int totalPage){ `Bn=?9
return currentPage == totalPage || totalPage == +PK6-c\r
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0 ? false : true; p*5\+WO>!(
} !,Zp? g)
+}Av-47`h
~ 7)A"t
} 7DlOW1|
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上面的这两个对象与具体的业务逻辑无关,可以独立和抽象。 N -w(e
vs6,
面对一个具体的业务逻辑:分页查询出User,每页10个结果。具体 vVT?h
2l5KJlfj>k
做法如下: [Vdz^_@Y
1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 YRlDX:oX~
^nVl (^{
的信息,和一个结果集List: zhB ">j8j
java代码: <:8,niKtw
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/*Created on 2005-6-13*/ m=qOg>k
package com.adt.bo; KjB/.4lLq
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import java.util.List; 9N[EZhW
6#A:}B<?
import org.flyware.util.page.Page; `:M^8SYrL
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/** @tRMe64
* @author Joa #pdUJ2)yM
*/ T}7uew\v0<
publicclass Result { ^%y`u1ab
>u J/TQU
private Page page; ;1DdjE Tr
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private List content; 6ri\>QrF
7.bN99{xPM
/** ^Jp*B;
* The default constructor VF0dE
*/ c#xP91.m
public Result(){ OuIv e>8
super(); K
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} oQ+61!5>
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/** b~7drf
* The constructor using fields :6;e\UE
* kpob b
* @param page @kD8^,( oH
* @param content >qT 'z$
*/ 2H?d+6Pt3
public Result(Page page, List content){ ?)3jqQ.
this.page = page; E@
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this.content = content; -pTI?
} -+U/Lrt>8
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/** FuP/tTMU1a
* @return Returns the content. INMP"1
*/ CBD_a#K{
publicList getContent(){ nbd Gt
return content; 2Eh@e([PMs
} 4f1D*id*`#
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/** >R,?hWT
* @return Returns the page. 'zgvQMu
*/ :X .,
public Page getPage(){ I6OSC&A`
return page; 0|)19LR
}
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/** ^>r^3C)_-
* @param content m =&j@
* The content to set. -a) T6:e
*/ "zV']A>4H
public void setContent(List content){ Ht=$] Px
this.content = content; dhR(_
} Z}cIA87U
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/** `B#Z;R
* @param page rpU/s@%L
* The page to set. T+TF-] J
*/ shi
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publicvoid setPage(Page page){ s'2Rs^,hN
this.page = page; \K`jCsT
} YQ,tt<CQ
} }]h\/,
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tjb/[RQ
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2. 编写业务逻辑接口,并实现它(UserManager, 3&J&^O
5
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UserManagerImpl) ~u/@rqF
java代码: NV!4(_~
F_PTMl=Q|J
q,,j',8kq/
/*Created on 2005-7-15*/ ;6<zjV7}
package com.adt.service; W]LQ &f
6D*chvNA;
import net.sf.hibernate.HibernateException; R@ QQNYU.D
91;HiILgT
import org.flyware.util.page.Page; +2O=s<fp
4[l^0
import com.adt.bo.Result; b{HhS6<K?
9A*rE.B+W
/** k|ip?O
* @author Joa a2 >[0_E
*/ j#o3
publicinterface UserManager { H0tF
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public Result listUser(Page page)throws e-!?[Ujv*%
Hd*Fc=>"Y
HibernateException; j1F w
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} A5+5J_)*
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GXEcpc08
f#mx:Q.7I
java代码: K!7q!%Ju
gD5P!}s[u0
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/*Created on 2005-7-15*/ ??+:vai2
package com.adt.service.impl; Ge~,[If+
ULTNhq
R*n
import java.util.List; Q%M_
:s-EG;.
import net.sf.hibernate.HibernateException; #ZF>WoC@e?
-=>U
=|
import org.flyware.util.page.Page; `+fk`5Y
import org.flyware.util.page.PageUtil; skK*OO2-
/THNP 8.
import com.adt.bo.Result; ,M{Q}:$+4
import com.adt.dao.UserDAO; vh{9'vd3el
import com.adt.exception.ObjectNotFoundException; pzAoq)gg:
import com.adt.service.UserManager; ;fkSrdj
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/** /Bm#`?(ia
* @author Joa fo;6huz
*/ RCQAtBd
publicclass UserManagerImpl implements UserManager { kI<WvgoL
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private UserDAO userDAO; h$|3dz N
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/** >6k}HrS1V
* @param userDAO The userDAO to set. 99a\MH`^
*/ n{L:MT9TD
publicvoid setUserDAO(UserDAO userDAO){ W?=$V>)
this.userDAO = userDAO; 6SV7\,2M
} Nr%(2[$ =
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/* (non-Javadoc) )7k&`?Mh
* @see com.adt.service.UserManager#listUser Y>G*'[U
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(org.flyware.util.page.Page) "*+\KPCU
*/ IO*l vy
public Result listUser(Page page)throws HLM;EZ
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HibernateException, ObjectNotFoundException { 64h_1,U
int totalRecords = userDAO.getUserCount(); !e&rVoA
if(totalRecords == 0) 5Yn{?r\#F
throw new ObjectNotFoundException _yNT=#/
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("userNotExist"); WN$R[N
page = PageUtil.createPage(page, totalRecords); 'YBi5_
List users = userDAO.getUserByPage(page); TF%3uH
returnnew Result(page, users); A*a7\id!y
} ix^gAot
n>br,bQe
} B;SzuCW
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其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 ) @!~8<_"
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询,接下来编写UserDAO的代码: xLe
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3. UserDAO 和 UserDAOImpl: ``+c`F?5
java代码: P`p6J8}4
L'13BRu`
C%0<1mp
/*Created on 2005-7-15*/ .F4oo =
package com.adt.dao; V_Xy2<V
M8\G>0Hc6
import java.util.List; nrF%wH/5
L^3~gM"!
import org.flyware.util.page.Page; #m[vn^8B]y
zwMQXI'k83
import net.sf.hibernate.HibernateException; ;0;3BH A
y*}AX%8`e~
/** {EOn r1
* @author Joa 3aEt>x
*/ T}V7SD.
publicinterface UserDAO extends BaseDAO { *4-r`k|@>/
CKx\V+\O
publicList getUserByName(String name)throws P)Z/JHB
CFD*g\g<*
HibernateException; uFGv%W
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publicint getUserCount()throws HibernateException; |)28=Z|Z
=>HIF#jU
publicList getUserByPage(Page page)throws iPA@<D%
Bh\
[CY
HibernateException; kSLSxfR
]&&I|K_
} :|?~B%-p[
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NdM}xh
7J0 ^N7"o
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java代码: )W[KD,0+j
.Ql;(Wyl
)EhTM-1
/*Created on 2005-7-15*/ h{Oz*Bq
package com.adt.dao.impl; +`Q
PBj^
Z|]l"W*w
import java.util.List; [P.@1mV
r$b:1 C~
import org.flyware.util.page.Page; z2rQ$O-#
zzulVj*
import net.sf.hibernate.HibernateException; :`{9x%o;
import net.sf.hibernate.Query; L@C >-F|p
p5lR-G
import com.adt.dao.UserDAO; O{;M6U8C\
@#bBs9@gv
/** ]+}:VaeA
* @author Joa ~| X99?P
*/ ZrmnQ
public class UserDAOImpl extends BaseDAOHibernateImpl 0lLr[
.a 'ETNY:>
implements UserDAO { j zxf"X-
@"q~AY
/* (non-Javadoc) d/0/$Bz}P
* @see com.adt.dao.UserDAO#getUserByName &M!4]pow
3&.TU5]`-
(java.lang.String) [VfLv.8w
*/ B|$\/xO
publicList getUserByName(String name)throws V/QTYy1
f9h:"Dnzin
HibernateException { 8.Pcr<