Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 h-XMr_F
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 a=55bEn
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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 U#B,Q6~
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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 T4W"!4[
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。 Z66b>.<8
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分页支持类: !~'\Ey
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java代码: V/0?0VKG
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package com.javaeye.common.util; A2`QlhZ
W~1/vJ.*l
import java.util.List; m_%1IJ
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publicclass PaginationSupport { &h7q=-XU
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publicfinalstaticint PAGESIZE = 30; X^tVq..0
`.# l_-U{
privateint pageSize = PAGESIZE; a0"gt"qA
728}K^7:
privateList items; !;SpQ28
lR!Sdd} -
privateint totalCount; 9<An^lLK*
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privateint[] indexes = newint[0]; x8a?I T.
LzEAA{
privateint startIndex = 0; :<%q9)aPf`
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public PaginationSupport(List items, int (K$K;f$"r
nL}bCX{
totalCount){ UarU.~Uqi
setPageSize(PAGESIZE); @<]xbWhuw
setTotalCount(totalCount); #vy:aq<bjE
setItems(items); }b9#.H9
setStartIndex(0); PN{l)&K2.
} ^4LkKYMS
,jBd3GdlZ
public PaginationSupport(List items, int khl(9R4a
PXGS5,
totalCount, int startIndex){ ]McLace&
setPageSize(PAGESIZE); 4z-sR/ d
setTotalCount(totalCount); .>0e?A4,5?
setItems(items); "(}xIsy
setStartIndex(startIndex); N\<RQtDg
} [y
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Vw*;xek?
public PaginationSupport(List items, int XD`QU m
4BG6C'`%
totalCount, int pageSize, int startIndex){ L<>;E
setPageSize(pageSize); :GC<U|p
setTotalCount(totalCount); d:0RDK-}s
setItems(items); N2_j[Pe
setStartIndex(startIndex); (NUk{MTX
} >n@?F[ Y
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publicList getItems(){ I)ub='+&;
return items; wVBY^TE
} w>T1D
rt%.IQdY
publicvoid setItems(List items){ *b?C%a9
this.items = items; ?H7*? HV
} -
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FxSBxz<N-A
publicint getPageSize(){ (Q !4\Gy
return pageSize; <@n/[ +3
} cA"',N8!5
lTPo2-j/eK
publicvoid setPageSize(int pageSize){ ^RG6h
this.pageSize = pageSize; : j&M&+
} KO(+%>^R
}N5>^y
publicint getTotalCount(){ 4NL TtK
return totalCount; 59";{"sw
} -zg,pK$+
CjM+%l0MW
publicvoid setTotalCount(int totalCount){ CG IcuHp
if(totalCount > 0){ $]4^ENkI
this.totalCount = totalCount; KyW6[WA9
int count = totalCount / 22|eiW/a
vV1F|
pageSize; 5O&6 (Gaf
if(totalCount % pageSize > 0) cb l@V 1
count++; ^_JD
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indexes = newint[count]; <Mo_GTOC!
for(int i = 0; i < count; i++){ ]{Vq;
indexes = pageSize * ~oI7TP
Vb06z3"r
i; `pF|bZ?v
} \pZ,gF;y
}else{ z8M^TV
this.totalCount = 0; \4I1wdd|^
} 9i WDEk
} $j^Jj
ilQR@yp*
publicint[] getIndexes(){ JxI}#iA
return indexes; I,vy__sZ
} 7/NXb
[P2$[|IM
publicvoid setIndexes(int[] indexes){ S =q.Y
this.indexes = indexes; 3 q
} [AQ6ads)
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publicint getStartIndex(){ Mn $TWhg'
return startIndex; oju7<b9Ez
} "<0BCJJ
-;'8#"{`^
publicvoid setStartIndex(int startIndex){ QJp
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if(totalCount <= 0) 6}
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this.startIndex = 0; ?:Y{c#w>
elseif(startIndex >= totalCount) =?T\zLN=
this.startIndex = indexes elb|=J`M0
?U~C= F?K
[indexes.length - 1]; 8Wid.o-U
elseif(startIndex < 0) 6GG&mqr+
this.startIndex = 0; n'0^l?V
else{ aOfL;I
this.startIndex = indexes #gi0FXL
-WwFUm
[startIndex / pageSize]; VYkOJAEBg
} ?8. $A2(Xw
} kVw5z3]Xg
]uX'[Z}t
publicint getNextIndex(){ q=ZLSBZ
int nextIndex = getStartIndex() + 2V_C_5)1
Y$!K<c k
pageSize; `h_,I R<
if(nextIndex >= totalCount) >>=lh
return getStartIndex(); }N(-e$88
else E"bYl3
return nextIndex; WM NcPHcj
} DCM,|FE
*W,"UL6U8y
publicint getPreviousIndex(){ fLL_{o0T
int previousIndex = getStartIndex() - }rsD$
K>6#MI
pageSize; <~t38|Ff@
if(previousIndex < 0) b gGd
return0; oL>m}T
else wxVf6`
return previousIndex; LU~U>
} u _s
v'Gqdd-#)
} y$7Fq'
/8@JWK^I{
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抽象业务类 "0 \U>h
java代码: 4%~$A`7
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n|IdEgD$
/** ~"!F&
* Created on 2005-7-12 9+U%k(9
*/ 0[TZ$<v"
package com.javaeye.common.business; lZZ4 O(
Cq;t;qN,nQ
import java.io.Serializable; \ }>1$kH;
import java.util.List; XWZ
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import org.hibernate.Criteria; ym:^Y-^iV
import org.hibernate.HibernateException; k1i*1Tc
import org.hibernate.Session; y 562g`"U
import org.hibernate.criterion.DetachedCriteria; Teu4 ;
import org.hibernate.criterion.Projections; |[(4h
import =\`g<0
0*YLFqN
org.springframework.orm.hibernate3.HibernateCallback; ?Q;8D@
import N_Cu%HP
G*2bYsnhX
org.springframework.orm.hibernate3.support.HibernateDaoS 0DhF3]
A;m)/@
upport; ViQxOUE
7lY&/-V
import com.javaeye.common.util.PaginationSupport; Q7UFF
."l@aE=|
public abstract class AbstractManager extends Ox.&tW%@
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HibernateDaoSupport { &^FCp'J-
iq-n(Rfw~
privateboolean cacheQueries = false; 2-j+-B|i
, .uu/qV}w
privateString queryCacheRegion; hc2[,Hju{O
o)Kx:l +f
publicvoid setCacheQueries(boolean _%w-y(Sqn
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cacheQueries){ .9+"rK}u
this.cacheQueries = cacheQueries; k-xh-&
} RoSh|$JF
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publicvoid setQueryCacheRegion(String 'x{g P?.
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queryCacheRegion){ i%+cPQ^o
this.queryCacheRegion = G<OC99;8
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queryCacheRegion; ~'KymarPU
} LOpnPH`
qEPvV
publicvoid save(finalObject entity){ yjvzA|(YC
getHibernateTemplate().save(entity); 6 /gh_'&
} p#hs8xz
DxR__
publicvoid persist(finalObject entity){ &H$
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getHibernateTemplate().save(entity); c-3AzB#[
} KRQKL`}}
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publicvoid update(finalObject entity){ jhrmQS
getHibernateTemplate().update(entity); W_9-JM(r
} K,bv\j;f
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publicvoid delete(finalObject entity){ U(3+*'8r,1
getHibernateTemplate().delete(entity); /+pbO-r W*
} I>o+INb:
dawe!w!
publicObject load(finalClass entity, I-oI,c%+
>(S4h}^I
finalSerializable id){ uQazUFw
return getHibernateTemplate().load (f^WC,
2s>dlz
(entity, id); u@5vK2
} /:d03N\9k
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publicObject get(finalClass entity, _R<eWp
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finalSerializable id){ B
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return getHibernateTemplate().get L22GOa0
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(entity, id); jnsV'@v8Nj
} 0{#,'sc;
kmPK |R
publicList findAll(finalClass entity){ =fG c?PQ
return getHibernateTemplate().find("from =k6zUw;5 U
}Iz'#I
Xx
" + entity.getName()); MO&QR-OY
} S`gUSYS"w
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publicList findByNamedQuery(finalString z=:<]j#=
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namedQuery){ 6Ae <W7
return getHibernateTemplate W.TZU'%
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().findByNamedQuery(namedQuery); g^@Kx5O\
} #3vq+mcn
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publicList findByNamedQuery(finalString query, ,L%\{bp5
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finalObject parameter){ sE@t$'=
return getHibernateTemplate /=I&-gxC
\GS]jhEtn
().findByNamedQuery(query, parameter); (G $nN*rlu
} ^IGutZov
cZI )lX
publicList findByNamedQuery(finalString query, x=Z\c,@O
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finalObject[] parameters){ 5!u.w
return getHibernateTemplate w^Qb9vTa8
&SfJwdG*=
().findByNamedQuery(query, parameters); |#8u:rguy
} H((!
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f$N
publicList find(finalString query){ FVM:%S
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return getHibernateTemplate().find M-1 VB5
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(query); .}>d[},F
} ,g2|8>sJP
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publicList find(finalString query, finalObject x4|>HY<p?
: Y/i%#*1
parameter){ }[XzM/t
return getHibernateTemplate().find k<RJSK8
3kFSu
(query, parameter); w^MU$ubx
} {WUW.(^]G
y>wrm:b-O
public PaginationSupport findPageByCriteria >FED*C4
?#?[6t
(final DetachedCriteria detachedCriteria){ w='1uV<6
return findPageByCriteria ktLXL;~X
\~!9T5/*
(detachedCriteria, PaginationSupport.PAGESIZE, 0); Z*S
9pkWcF
} Q<W9<&VZe
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public PaginationSupport findPageByCriteria WGjT06a\
l<5O\?Vo]
(final DetachedCriteria detachedCriteria, finalint meunAEe
tz0@csXV
startIndex){ 'WK}T)o
return findPageByCriteria Qb}7lm{r
S!Ue+jW
(detachedCriteria, PaginationSupport.PAGESIZE, {|?OKCG{
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startIndex); BE. v+'c"
} i0DYdUj
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public PaginationSupport findPageByCriteria p6m](Jg
C{>@b:]p
(final DetachedCriteria detachedCriteria, finalint It'hmwu#
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pageSize, ]jiM
finalint startIndex){ YVt#( jl
return(PaginationSupport) Kn3qq
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getHibernateTemplate().execute(new HibernateCallback(){ /.<%y8v
publicObject doInHibernate jv7-i'I@
Qj: D=j8
(Session session)throws HibernateException { eq.K77El{J
Criteria criteria = ?:l3O_U5
(pM5B8U
detachedCriteria.getExecutableCriteria(session); _[;>V*?zp5
int totalCount = |_L\^T|6
fkE4[X7f
((Integer) criteria.setProjection(Projections.rowCount 3a PCi>i!_
,73kh
()).uniqueResult()).intValue(); NIufL
}6\
criteria.setProjection W^; wr#
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(null); nIdB,
List items = V5sH:A7GJ
hJY= )
criteria.setFirstResult(startIndex).setMaxResults ceBu i8a
|
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(pageSize).list(); z}\TS.
PaginationSupport ps = }~pT
saw
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new PaginationSupport(items, totalCount, pageSize, *izPLM}+
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startIndex); OAPR wOQ^=
return ps; (sLFJ
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} V`xZ4 i%L
}, true); WLGk
} rX*4$d0
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public List findAllByCriteria(final 3YT>3f!\
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DetachedCriteria detachedCriteria){ [=*c8
return(List) getHibernateTemplate 's]I:06A
=9$hZ c
().execute(new HibernateCallback(){ gwE#,OY*
publicObject doInHibernate p12'^i |
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(Session session)throws HibernateException { r0kJx$f
Criteria criteria = :*|%g
2u 8z>/G
detachedCriteria.getExecutableCriteria(session); iu!j#VO
return criteria.list(); x+Vp&
} 1SIhW:C
}, true); =d>^q7s
} Zwj\Hz.
#T<<{ RA
public int getCountByCriteria(final S1oRMd)r
vi?{H*H4c
DetachedCriteria detachedCriteria){ ',GWH:B
Integer count = (Integer) Z)E[Bv=
UjLZ!-}
getHibernateTemplate().execute(new HibernateCallback(){ 2{^k*Cfd
publicObject doInHibernate d]Y-^&]{]
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(Session session)throws HibernateException { p6~\U5rXm
Criteria criteria = Yw7+wc8R
db$wKvO1
detachedCriteria.getExecutableCriteria(session); P5 GM s
return N-*
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ioxsx>e<
criteria.setProjection(Projections.rowCount gBM6{48GF
RC(fhqV
()).uniqueResult(); r;:5P%:
} !DsKa6Zj
}, true); }^r=(
return count.intValue(); ^M?O
} / J 3
} s}Y_og_c
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用户在web层构造查询条件detachedCriteria,和可选的 Fy1@B(V%
(!kd9uV
startIndex,调用业务bean的相应findByCriteria方法,返回一个 /G)Y~1ASA%
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PaginationSupport的实例ps。 i,HafY
ygt7;};!
ps.getItems()得到已分页好的结果集 awP
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ps.getIndexes()得到分页索引的数组 \hGoD
ps.getTotalCount()得到总结果数 J9s4lsea
ps.getStartIndex()当前分页索引 vY|{CBGbd
ps.getNextIndex()下一页索引 wX(h]X"q
ps.getPreviousIndex()上一页索引 paFiuQ
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T}DP35dBzE
r9!jIkILz
E"LSM]^^<f
3Z?"M
连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 8@`"Zz M
Z^t" !oY
,尤其是上面的示例代码,让我着实觉得该对我原来的分页查询做 H/!_D f
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一下代码重构了。 ZJUTti D
jys1Ki
我把原本我的做法也提供出来供大家讨论吧: s$g"6;_\
h<KE)^).
首先,为了实现分页查询,我封装了一个Page类: U)IW6)q
java代码: qRXQL"Pe_l
l :sZ
/8V#6d_
/*Created on 2005-4-14*/ &Xr@nt0H
package org.flyware.util.page; :e9}k5kdk
tK9_]663
/** nXjf,J-T
* @author Joa &?~OV:r9
* 3SbtN3
*/ xw?Mc{w
publicclass Page {
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QwaCaYoh
/** imply if the page has previous page */ o`B,Pt5vu
privateboolean hasPrePage; ,E&PIbDL1
P'Q|0lB
/** imply if the page has next page */ S $wx>715
privateboolean hasNextPage; N>,`l
c%2C\UB
/** the number of every page */ \
;.W;!*
privateint everyPage; ]Z/<HP$#
z#qlu=
/** the total page number */ foh>8/AL/
privateint totalPage; &(H;Bin'
B> kx$_~
/** the number of current page */ =,Yi" E
privateint currentPage; Pba 6Ay6B
J*)Vpk
/** the begin index of the records by the current CiE
h-0sDt pR
query */ 'FB?#C %U
privateint beginIndex; 6=V&3|"
FD?!bI4
jJ^p
?
/** The default constructor */ VCOz?Y*
public Page(){ {d`e9^Z:
S+c)
} ~udi=J|
b"U{@
/** construct the page by everyPage 25xpq^Zw
* @param everyPage eKdF-;
* */ D ff0$06Nq
public Page(int everyPage){ ,sEu[m
this.everyPage = everyPage; XA8{N
} MB$K ?"Y
$JKR,
/** The whole constructor */ cID{X&or
public Page(boolean hasPrePage, boolean hasNextPage, H{*~d+:ol
p4m9@\gn
N?!]^jI,
int everyPage, int totalPage, q,k/@@Qd9
int currentPage, int beginIndex){ qTM,'7Rwn
this.hasPrePage = hasPrePage; KPGo*mY
this.hasNextPage = hasNextPage; SrMg=a
this.everyPage = everyPage; BMlnzi
this.totalPage = totalPage; 0@w8,x
this.currentPage = currentPage; :r0?[#r?N,
this.beginIndex = beginIndex; m.ib#Y)y
} y%.^|
G
dZnAdlJ
/** m/#)B6@A
* @return A%H" a+
* Returns the beginIndex. ICSi<V[y1
*/ #]nH$Kq
publicint getBeginIndex(){ sFNB rL
return beginIndex; }Dk*Hs^E
} x5q5<-#
_c*0Rr
/** ?yKW^,q+
* @param beginIndex g~FA:R
* The beginIndex to set. ya7/&Z
)0
*/ g70B22!y
publicvoid setBeginIndex(int beginIndex){
<^j,jX
this.beginIndex = beginIndex; "b&[W$e
} ?m3,e&pB5
xA|72!zk0P
/** #7S[Ch}O
* @return ZJev_mj
* Returns the currentPage. l4c9.'6
*/ ur\v[k=
publicint getCurrentPage(){ Sp+ zP-3
return currentPage; ;q:.&dak1
} c`]_Q1'30w
{Lj]++`fB]
/** k@1\ULo
* @param currentPage NFT&\6!o
* The currentPage to set. _F|oL|
*/ 9!hiCqA&
publicvoid setCurrentPage(int currentPage){ _~ m@ SI
this.currentPage = currentPage; #K1VPezN
} I$@0FSl
<uXZ*E
/** cPcp@Dp
* @return _97A9wHj
* Returns the everyPage. VUF^ r7e
*/ P qFK*^)s
publicint getEveryPage(){ Gni<@;}
return everyPage; #QdBI{2
} @y,pfWh`
d_CY=DHF%`
/** 5c?1JH62o8
* @param everyPage O)g\/uRy
* The everyPage to set. D/1{v
*/ 2y6 e]D
publicvoid setEveryPage(int everyPage){ ml=tS,
this.everyPage = everyPage; Ew>E]Ys
}
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{ETuaFDM
/** XV"8R"u%Q
* @return gkDyWZG B
* Returns the hasNextPage. \XaKq8uE
*/ qKX3Npw
publicboolean getHasNextPage(){ &)?ECj0`
return hasNextPage; -ea":}/
} EHByo[
<-xI!o"}
/** "F
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* @param hasNextPage qV^Z@N+,
* The hasNextPage to set. E/MD]ox
*/ w'NL\>
publicvoid setHasNextPage(boolean hasNextPage){ Opc, {,z6
this.hasNextPage = hasNextPage; `Pa z
} j2A
Z.s
4+fWIY1
"
/** 9VyY[&
* @return L;d(|7BVv
* Returns the hasPrePage. J[6`$$l0
*/ Ke0j8|
publicboolean getHasPrePage(){ :77dl/d%
return hasPrePage; K.k%Tg[ ~
} 9r,)Bw!RP
r(g:b
^S
/** fUy:TCS
* @param hasPrePage SJ(<u2J]
* The hasPrePage to set. K0hmRR=
*/ WP/?(%#Y
publicvoid setHasPrePage(boolean hasPrePage){ eEvE3=,hg
this.hasPrePage = hasPrePage; y\M]\^[7
} #bN'N@|
DEj6 ky
/** @LQe[`
* @return Returns the totalPage. !zc?o?~z
* ~I'1\1
*/ {OA2';3
publicint getTotalPage(){ ~\;s}Fv.
return totalPage; ]3B8D<p
} L\1&$|?
u-yVc*<,
/** R(jp
* @param totalPage b^WTX
* The totalPage to set. Bf
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*/ /DxaKZ ;b
publicvoid setTotalPage(int totalPage){ s,&tD
WU
this.totalPage = totalPage; sFhmp
} .UJp#/EHs
v<+5B5"1
} ''Lf6S`4X~
\]bAXa{ p
/_yJ;l/K
:Fe}.* t
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+Y
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 v#yeiE4
TGUlJLT
个PageUtil,负责对Page对象进行构造: S6~&g|T,
java代码: OsQB`
D
L[M`LZpJo
Rd|#-7
/*Created on 2005-4-14*/ KmUH([#
package org.flyware.util.page; 2y"]rUS`
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import org.apache.commons.logging.Log; &-l(nr]h]
import org.apache.commons.logging.LogFactory; A.`)
0dV
re\pE2&B
/** ZdcG6IG+
* @author Joa %d3KE|&u
* Pe-1o#7~W
*/ fpESuVKr
publicclass PageUtil { hq.XO=0" k
)SJ18 no|l
privatestaticfinal Log logger = LogFactory.getLog B4 XN
G)|s(C!
(PageUtil.class); ((Jiv=%
9d5|rk8VS
/** ;gE]*Y.Z.p
* Use the origin page to create a new page ak_&\'P
* @param page S.^/Cl;aj
* @param totalRecords El9D1],
* @return '
];|
*/ 5Vq&w`sW
publicstatic Page createPage(Page page, int 0m`{m'B4n
=Fu~ 0Wc
totalRecords){ m+Um^:\jX
return createPage(page.getEveryPage(), {`X O3
[PRQa[_
page.getCurrentPage(), totalRecords); qKL:#ny
} bUcq
LV
3W<_J_[
/** [\41
* the basic page utils not including exception NG)Xk[q4
y9/x:n&]
handler 9hbn<Y
* @param everyPage a,>`ab%>
* @param currentPage -Y?C1DbKz
* @param totalRecords -chk\75
* @return page 3Gr:.V9=
*/ }VetaO2*
publicstatic Page createPage(int everyPage, int zG"*B_l}+
Qj:`[#3?2
currentPage, int totalRecords){ 5Xe1a'n5]
everyPage = getEveryPage(everyPage); |ORro
r}
currentPage = getCurrentPage(currentPage); J~"h&>T
int beginIndex = getBeginIndex(everyPage, oZ
CvEVUk
q!r4"#Y"@Z
currentPage); L("zS%qr
int totalPage = getTotalPage(everyPage, 8Q wn
#YEOY#
totalRecords); :3oLGiL
boolean hasNextPage = hasNextPage(currentPage, f&ZFG>)6
.+.BNS
totalPage); F4o)6+YM
boolean hasPrePage = hasPrePage(currentPage); O|ODJOQNol
E;*JD x
returnnew Page(hasPrePage, hasNextPage, 4/_@ F>I_
everyPage, totalPage, 7QnQ=gu
currentPage, h#EksX
DrY5Q&S
beginIndex); ?H30
} 0q4E^}iR
n91@{U)QJ3
privatestaticint getEveryPage(int everyPage){ =
nIl$9
return everyPage == 0 ? 10 : everyPage; I4Y;9Gg
} x{|`q9V~ N
!}+rg2
privatestaticint getCurrentPage(int currentPage){ f\/'Fy0
return currentPage == 0 ? 1 : currentPage; K4.GAGd
} _,G^#$pH
H0 %;t
privatestaticint getBeginIndex(int everyPage, int .#BWu(EYV
AJ%x"
currentPage){ E <O:
return(currentPage - 1) * everyPage; S|_} 0
} +6i~Rx>
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privatestaticint getTotalPage(int everyPage, int =xf7lN'
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totalRecords){ |1rKGDc
int totalPage = 0; I7Uj<a=(q
K]bw1KK
if(totalRecords % everyPage == 0) S2!$
totalPage = totalRecords / everyPage; 0r |mg::'
else Da@H^
totalPage = totalRecords / everyPage + 1 ; "&Y5Nh
:t'*fHi~
return totalPage; r6x"D3
} Z'@a@Y+
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privatestaticboolean hasPrePage(int currentPage){ !(&N{NH9
return currentPage == 1 ? false : true; '9w.~@7
} kr=&x)Wy!
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privatestaticboolean hasNextPage(int currentPage, |IgH0
zZ
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int totalPage){ h^`!kp
return currentPage == totalPage || totalPage == ;DG&HO
4/Wqeq,E8
0 ? false : true; W/?\ 8AE
} %K$f2):
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} uy
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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。 B(z?IW&
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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 :VB{@ED
tt%lDr1A)
做法如下: a2vZ'
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>@st="
hM/:zC:
的信息,和一个结果集List: hG8!aJo
java代码: u\uY q
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/*Created on 2005-6-13*/ eX1<zzd
package com.adt.bo; Px$4.b[{_Y
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import java.util.List; <,Z6=M`
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import org.flyware.util.page.Page; YR\pt8(z?
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/** WF!u2E+
* @author Joa Kj+=?R~}S
*/ $vQ#ah/k
publicclass Result { ar#Xe;T!
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private Page page; EU0b>2n4
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private List content; F79!B
7/:C[J4GTN
/** GmJ4AYEP
* The default constructor ujt0?DM
*/ }CoR$K
public Result(){ .dM|J'`g
super(); ._$tNGI4
} #K[UqJ+x
|;[%ZE"
/** 5VXI/Lw#
* The constructor using fields 2VY.#9vl
*
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* @param page B,f4<
* @param content ~Ip-@c}'j
*/ OZ'=Xtbn
public Result(Page page, List content){ o(w xu)
this.page = page; ap7ZT7KW
this.content = content; a'U}.w}
} T/b%,!N)
)T_o!/\*|*
/** Jh)x_&R&Q
* @return Returns the content. e=yQFzQT)
*/ ?f{--|V
publicList getContent(){ &/}reE*
return content; p}r1@L s
} R}S@u@mOE
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/** lebwGW,!
* @return Returns the page. !i`HjV0wS
*/ @'Y^A
public Page getPage(){ s_j ?L
return page; m,TN%*U!
} $}* bZ~
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/** Qel2OI `b
* @param content C(Bh<c0@
* The content to set. X/8CvY#n
*/ 3b#eB
public void setContent(List content){ `ecIy_O3P&
this.content = content; _3_kvs
} Uh9p,AV
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/** >3v
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* @param page k/hD2tBLu
* The page to set. C}= *%S
*/ R;6$lO8C&
publicvoid setPage(Page page){ HoTg7/iK
this.page = page; ?hXeZB+b4
} Xqz\%&G
} .d4L@{V
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2. 编写业务逻辑接口,并实现它(UserManager, 5\?\|* WT
I 19 /
UserManagerImpl) WPN4mEow
java代码: D<DSK~
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tz).] E
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/*Created on 2005-7-15*/ O@Ro_sPG(
package com.adt.service; W$I^Ej}>$
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import net.sf.hibernate.HibernateException; OrZ =-9"
s5
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import org.flyware.util.page.Page; .:`+4n
7;wx,7CUq
import com.adt.bo.Result; !ULU#2'1
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/** )37 .H^7
* @author Joa ['*{f(AI
*/ sv g`s,g
publicinterface UserManager { 3>+9Rru
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public Result listUser(Page page)throws Q7~9~
w,,QXJe{Z_
HibernateException; N 9.$--X}D
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} ;?*`WB
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java代码: 6rx%>\UkS
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QXQ'QEG
/*Created on 2005-7-15*/ e1EFZ,EcaO
package com.adt.service.impl; kPt] [1jo
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import java.util.List; U:a-Wi+
5*q!:$
W
import net.sf.hibernate.HibernateException; _>6xUt
L$Uy
import org.flyware.util.page.Page; :skNEY].
import org.flyware.util.page.PageUtil; V[w Y;wj
%y{f]m
import com.adt.bo.Result; Qh0tU<jG
import com.adt.dao.UserDAO; /9K,W)h_
import com.adt.exception.ObjectNotFoundException; AB.gVw|
4
import com.adt.service.UserManager;
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/** :3uCW1
* @author Joa hJkSk;^
*/ &EELq"5K
publicclass UserManagerImpl implements UserManager { "5 /i
iq25|{1$
private UserDAO userDAO; pq3W.7z;b
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/** ({R-JkW:;
* @param userDAO The userDAO to set. l[MP|m#
*/ ~ _!lx
publicvoid setUserDAO(UserDAO userDAO){ $,/;QP}
this.userDAO = userDAO; QM"\;l??
} /uh?F
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/* (non-Javadoc) p}b:(QN~m
* @see com.adt.service.UserManager#listUser c Nhy.Z~D
P
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(org.flyware.util.page.Page) fAW(
*/ *FINNNARB
public Result listUser(Page page)throws efc<lSUR
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HibernateException, ObjectNotFoundException { W-pN
int totalRecords = userDAO.getUserCount(); C\Y%FTS:
if(totalRecords == 0) h~!KNF*XW
throw new ObjectNotFoundException (9"w{pnlLc
n]15 ~GO.
("userNotExist"); n!Ic.T3PA
page = PageUtil.createPage(page, totalRecords); Q)n6.%V/e
List users = userDAO.getUserByPage(page); P0Q]Ds|
returnnew Result(page, users); JlM0]__v
} .nN>Ipv
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} 0wh4sKm[X
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其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 b3h3$kIYN
p4Wy2.&Q
询,接下来编写UserDAO的代码: 8)NQt$lWp
3. UserDAO 和 UserDAOImpl: lBYc(cr
java代码: H}nPaw]G
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BA5b;+o-
/*Created on 2005-7-15*/ DX*eN"z[
package com.adt.dao; rz@FUU:&
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import java.util.List; rt_k }
A ;06Zrf1
import org.flyware.util.page.Page; 2 SJN;A~}
c,v?2*<
import net.sf.hibernate.HibernateException; >dr34=(
r Ljb'\<*
/** 0LjF$3GpZ
* @author Joa g }%$VUSA
*/ nn1T5;
publicinterface UserDAO extends BaseDAO { bm</qF'T6
VV$$t;R/
publicList getUserByName(String name)throws nx2iEXsa
vFz#A/1
HibernateException; /OX;3" +1
vC#
*w,
publicint getUserCount()throws HibernateException; PsV1btq]
gsSUm f1
publicList getUserByPage(Page page)throws |5;:3K+
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HibernateException; Y`U[Y Hx
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} Xf"B\%,(`
THOXs;
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vmY 88Kx&S
java代码: J%:D%=9 )
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@_ZE_n
/*Created on 2005-7-15*/ w[/_ o,R
package com.adt.dao.impl; ;b-d2R
0-=PP@W
import java.util.List; 6AA"JX
#77p>zhY
import org.flyware.util.page.Page; y|+n77[Gv
wqZ*$M
import net.sf.hibernate.HibernateException; zFFip/z\
import net.sf.hibernate.Query; KeGGF]=>
Os5Xejh`I
import com.adt.dao.UserDAO; |})7\o
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/** 3SeM:OYq]s
* @author Joa dw"Tv~
*/ TTfU(w%&P
public class UserDAOImpl extends BaseDAOHibernateImpl GY3g`M
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implements UserDAO { o)M=; !
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/* (non-Javadoc) |)4aIa
* @see com.adt.dao.UserDAO#getUserByName TA~FP#.
.*x |TPv{
(java.lang.String) (Cc!Iw'0M
*/ d4 r@Gx%BE
publicList getUserByName(String name)throws nXg:lCI-uu
@ uF$m/g
HibernateException { Q&@~<!t
String querySentence = "FROM user in class ;;Y>7Kn!u
5LF#w_x
com.adt.po.User WHERE user.name=:name"; [%1 87dz:D
Query query = getSession().createQuery fl4z'8P"(
ij|+MX
(querySentence); ;
*@lH%u
query.setParameter("name", name); NCKhrDd&
return query.list(); xc&&UKd
} $ lC*q
H;=JqD8`
/* (non-Javadoc) p_Yx"nO7
* @see com.adt.dao.UserDAO#getUserCount() `nvm>u~[Hq
*/ &y~~Z [.F,
publicint getUserCount()throws HibernateException { &l