Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 8Wtr,%82
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 9({ 9 r[U
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据这一功能,我设计了通用的抽象Bean基类和分页类支持,代码来 [8tpU&J
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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 MTE1\,
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。 En-=z`j
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分页支持类: SLkgIb~'X
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java代码: :SN? t
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package com.javaeye.common.util; v%`k*n':
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import java.util.List; JT6Be8
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publicclass PaginationSupport { >3 p8o@:
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publicfinalstaticint PAGESIZE = 30; >PdrLwKS
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privateint pageSize = PAGESIZE; j}@LiH'Q
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privateList items; OHngpe4
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privateint totalCount; HCktgL:E=
9ygNJX'~
privateint[] indexes = newint[0]; %ID48_>*
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privateint startIndex = 0; E'+z.~+
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public PaginationSupport(List items, int vXdI)Sx[
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totalCount){ /^~)iTwH
setPageSize(PAGESIZE); [8DPZU@
setTotalCount(totalCount); #'#@H
setItems(items); ?v+el,
setStartIndex(0); Kx;l a
} |D;I>O^"R
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public PaginationSupport(List items, int \H PB{
;
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totalCount, int startIndex){ uqBV KE
setPageSize(PAGESIZE); x f:|lQf
setTotalCount(totalCount); Q`=d5Uvw
setItems(items); d<cQYI4V
setStartIndex(startIndex); ?%>S5,f_
} 0w2<2grQ
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public PaginationSupport(List items, int [;C*9Nl
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totalCount, int pageSize, int startIndex){ ``h*A
setPageSize(pageSize); .g_Kab3?L
setTotalCount(totalCount); #("E)P
setItems(items); -{*QjP;K
setStartIndex(startIndex); 7X/B9Hee
} y 5Kr<cF^
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publicList getItems(){ SQG9m2
return items; 7x$VH5jie#
} ukee.:{
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publicvoid setItems(List items){ Q"GZh.m
this.items = items; FCt %of#
} u>03l(X6f
QyEoWKu;
publicint getPageSize(){ U,\t2z
return pageSize; o7fJ@3B/
} Z~g7^,-t
R6irL!akAd
publicvoid setPageSize(int pageSize){ KD..X~Me
this.pageSize = pageSize; K@!Gs'Op
} @B>pPCowa
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publicint getTotalCount(){ E*UE?4FSw|
return totalCount; +78cQqDY!
} 6PRP&|.#
CGZ3-OW@E
publicvoid setTotalCount(int totalCount){ Y$eO:67;
if(totalCount > 0){ )#025>$z
this.totalCount = totalCount; yRldPk_
int count = totalCount / PCiwQ4~
J@(69&
pageSize; >+ku:<Hw%.
if(totalCount % pageSize > 0) J4m2|HK
count++; u'"]{.K>fb
indexes = newint[count]; Ibu 5
for(int i = 0; i < count; i++){ "l-R|>6~
indexes = pageSize * Au{J/G<W@
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i; LVBE+{P\5?
} "VQ7Y`,+
}else{ -h,?_d>
this.totalCount = 0; sk~inIj-
} 1c*XmMB
} ?%i~~hfH#N
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publicint[] getIndexes(){ Xny{8Oo<1?
return indexes; \ H!Klp
} }6 MoC0
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publicvoid setIndexes(int[] indexes){ [ih^VlZ
this.indexes = indexes; =]W[{@P
} %HcCe[d5l
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publicint getStartIndex(){ k[5:]5lp+
return startIndex; YaAOP'p
} }]|e0 w:
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publicvoid setStartIndex(int startIndex){ j4}Q
if(totalCount <= 0) rE9Nt9}
this.startIndex = 0; ^.@F1k
elseif(startIndex >= totalCount) K4Hu0
this.startIndex = indexes ^W,~
@ x5LrQ_`r
[indexes.length - 1]; I)q"M]~
elseif(startIndex < 0) #,Cz+k*4
this.startIndex = 0; 5b;~&N4~
else{ &r1]A&
this.startIndex = indexes QeG3X+
2[g kDZ
[startIndex / pageSize]; 0@kL<\u
} tYMPqP,1.
} G]O5irsV
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publicint getNextIndex(){ QfRo`l/V9
int nextIndex = getStartIndex() + ZhY03>X
:?SD#Vvrh.
pageSize; PUErvLt
if(nextIndex >= totalCount) 'C)
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return getStartIndex(); dK>sHUu
else w[OUGn'
return nextIndex; MM(\>J[Uq
} x%T.0@!8
H7(D8.y )
publicint getPreviousIndex(){ Ix+eP|8F
int previousIndex = getStartIndex() - h`f $]_c
nB6 $*'
pageSize; hRZYvZ3
if(previousIndex < 0) ]EqwDw4
return0; 8yk4#CZ
else YFP<^y=
return previousIndex; BJKv9x1jK
} k{D0&
_fS4a134R
} $N\k*=
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抽象业务类 ~bsdy2&/q
java代码: (C0Wty
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/** [ps4i_
* Created on 2005-7-12 d'iSvd.
*/ g{CU1c)B
package com.javaeye.common.business; L8(2or
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import java.io.Serializable; vIf-TQw
import java.util.List; AG><5 }
6sG5n7E-A
import org.hibernate.Criteria; 5+yy:#J]
import org.hibernate.HibernateException; Z<,Hz+
import org.hibernate.Session; KW$.Yy
import org.hibernate.criterion.DetachedCriteria; Q]e]\J
import org.hibernate.criterion.Projections; I51I(QF=
import b[<L
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org.springframework.orm.hibernate3.HibernateCallback; ZG-#YF.1
import Xk\IO0GF
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org.springframework.orm.hibernate3.support.HibernateDaoS q;*'V9#
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upport; oW^>J-
hu.p;A3p;
import com.javaeye.common.util.PaginationSupport; %J Jp/I
q" EW*k+
)
public abstract class AbstractManager extends uQ|LkL%<^
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HibernateDaoSupport { RA?_j$
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privateboolean cacheQueries = false; (H"{r
%|D)U>o{
privateString queryCacheRegion; hQ(^;QcSu
&xA>(|a\&-
publicvoid setCacheQueries(boolean :!hO9ho
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cacheQueries){ y4l-o
this.cacheQueries = cacheQueries; h(R7y@mp\0
} -%|
]
d ;
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publicvoid setQueryCacheRegion(String %|ClYr
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queryCacheRegion){ Ijap%l1I
this.queryCacheRegion = Na@;F{
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queryCacheRegion; zA}JVB
} ,]nRnI^
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publicvoid save(finalObject entity){ 8)>T>-os
getHibernateTemplate().save(entity); _|W&tB*
} ITg:OOQ
V8nQ/9R;
publicvoid persist(finalObject entity){ L)&^Pu
getHibernateTemplate().save(entity); $MGKGWx@E
} *xmC`oP
|vm-(HY!
publicvoid update(finalObject entity){ jMCd`Q]K
getHibernateTemplate().update(entity); pC0gw2n8M
} QlV(D<
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publicvoid delete(finalObject entity){ n1GX`K
getHibernateTemplate().delete(entity); <bo^u w
} j,;f#+O`g
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publicObject load(finalClass entity, Z.!<YfA)
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finalSerializable id){ }yn%_KQ0
return getHibernateTemplate().load O`1!&XT{x
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(entity, id); -?:8sv*X
} ,/GFD[SQ
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publicObject get(finalClass entity, \)wVO*9*0
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finalSerializable id){ llR5qq=t
return getHibernateTemplate().get =liyd74%`
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(entity, id); wBg?-ji3<
} l3u+fE,;_
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publicList findAll(finalClass entity){ H7P}=YW".
return getHibernateTemplate().find("from ,1B4FAR&
[ ^\{>m7
" + entity.getName()); Z.Z31yF:f
} *0@Z+'M?
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publicList findByNamedQuery(finalString w5s&Ws
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namedQuery){
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return getHibernateTemplate 4clCZ@\K^
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().findByNamedQuery(namedQuery); ws,?ImA
} CdCY#$Z
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publicList findByNamedQuery(finalString query, B/K=\qmm
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finalObject parameter){ ? eI)m
return getHibernateTemplate
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().findByNamedQuery(query, parameter); ^/Yk*Ny
} q[vO
mes
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publicList findByNamedQuery(finalString query, v,N!cp1
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finalObject[] parameters){ ~Ni-}p
return getHibernateTemplate Yz0HBEA
X"g,QqDD
().findByNamedQuery(query, parameters); %jq
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} v6aMYmenBH
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publicList find(finalString query){ _}']h^@Z
return getHibernateTemplate().find C'l\4ij)7
)PU\|I0|)e
(query); :18}$
} !f/^1k}SR
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publicList find(finalString query, finalObject GO][`zZJ]
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parameter){ HP 3%CB
return getHibernateTemplate().find U'5p;j)_
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(query, parameter); PiR`4Tu
} C`3fM05g
HQ4WunH2Y
public PaginationSupport findPageByCriteria _Bn8i(
/n,a0U/
(final DetachedCriteria detachedCriteria){ EmP2r*"rb
return findPageByCriteria )0;O<G] d
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9`[u
(detachedCriteria, PaginationSupport.PAGESIZE, 0); cx)x="c
} .fhfO @
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public PaginationSupport findPageByCriteria &\/}.rF
ke +\Z>BWN
(final DetachedCriteria detachedCriteria, finalint o1]1I9
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startIndex){ dwzk+@]8
return findPageByCriteria Dp@m"_1`+
"bO]AG
(detachedCriteria, PaginationSupport.PAGESIZE, yAel4b/}
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startIndex); A#79$[>w
} .N#grk)C
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public PaginationSupport findPageByCriteria 3URrK[%x`
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(final DetachedCriteria detachedCriteria, finalint =&U7:u
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pageSize, <jVk}gi)Jp
finalint startIndex){ 3_ =:^Z
return(PaginationSupport) UZc{ Av
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getHibernateTemplate().execute(new HibernateCallback(){ (W`=`]!
publicObject doInHibernate E|B1h!!\c
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ru
(Session session)throws HibernateException { q]*:RI?wGT
Criteria criteria = WOGMtT%
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detachedCriteria.getExecutableCriteria(session); $4TawFf"nc
int totalCount = Nx(y_.I{K
jCt[I5"+z
((Integer) criteria.setProjection(Projections.rowCount /lvH p
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()).uniqueResult()).intValue(); /#?i +z
criteria.setProjection HmEU;UbO-
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(null); x "PMi[4
List items = a,p7l$kK
9D mQ
criteria.setFirstResult(startIndex).setMaxResults /E6Tt
uwb>q"M
(pageSize).list(); wsfn>w?!V
PaginationSupport ps = #EU x1II
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new PaginationSupport(items, totalCount, pageSize, 7{XI^I:n
qgU$0enSs
startIndex); Zcv1%hI
return ps; pXCmyLQ
} >+fet ,
}, true); dM 7-,9Vc
} #G^?4Za
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public List findAllByCriteria(final ;e_n7>'#%
xq.,7#3
DetachedCriteria detachedCriteria){ >t
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return(List) getHibernateTemplate h4S,(*V$!
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().execute(new HibernateCallback(){ '/%]B@!
publicObject doInHibernate ?zGx]?1P1<
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(Session session)throws HibernateException { ,c<&)6FU]
Criteria criteria = ^<49NUB>
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]]
detachedCriteria.getExecutableCriteria(session); Ybo:2e
return criteria.list(); /N.xh
} {Z0(V"Q
}, true); S-l<+O1fy
} <ZO"0oz%
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public int getCountByCriteria(final Z;Q2tT/F
p5`iq~e9
DetachedCriteria detachedCriteria){ /9T.]H~
Integer count = (Integer) OSreS5bg
n@|5PI"bx
getHibernateTemplate().execute(new HibernateCallback(){ x7\b-EC
publicObject doInHibernate .aS`l~6
c\A
4-08
(Session session)throws HibernateException { )E9[=4+*C$
Criteria criteria = =rz7 x
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detachedCriteria.getExecutableCriteria(session); |H-%F?<{
return : EA-L
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criteria.setProjection(Projections.rowCount Z~R7 G
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()).uniqueResult(); CjR!dh1w_
} /LwS|c6}}
}, true); O-P'Ff"}t
return count.intValue(); |wbXu:
} u@&e{w~0
} Qa`+-Wu8
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用户在web层构造查询条件detachedCriteria,和可选的 |L9p. q
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 ]{Y7mpdB
:m]KVcF.
PaginationSupport的实例ps。 9'5< b
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ps.getItems()得到已分页好的结果集 DpCe_Vb%M
ps.getIndexes()得到分页索引的数组 *.us IH2
ps.getTotalCount()得到总结果数 u.yYE,9
ps.getStartIndex()当前分页索引 #~}4< 18
ps.getNextIndex()下一页索引 H0(.p'eN
ps.getPreviousIndex()上一页索引 cT21
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 :(A k:
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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 C>A} e6o
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一下代码重构了。 B#]:1:Qn
0VnRtLnqI
我把原本我的做法也提供出来供大家讨论吧: GX+Gqj.
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首先,为了实现分页查询,我封装了一个Page类: &8;Fi2}(L
java代码: 3mQ3mV:
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HQZJK82
/*Created on 2005-4-14*/ AvVPPEryal
package org.flyware.util.page; g#Z7ReMw
sFPh?
/** w1EB>!<;tj
* @author Joa i"0*)$
hW
* Bx/)Sl@
*/ }S"qU]>8a
publicclass Page { a|5<L
U#x`u|L&6
/** imply if the page has previous page */ ZcHd.1fXh
privateboolean hasPrePage; lDL(,ZZS`
\#v(f2jPF
/** imply if the page has next page */ ~Qd|.T
privateboolean hasNextPage; 4d_Az'7`4
ai<K6)
/** the number of every page */ [{0/'+;9
privateint everyPage; DW>O]\I
|['SiO$)
/** the total page number */ \j<aFOT(
privateint totalPage; A 4*D3\>%u
\qDY0hIv t
/** the number of current page */ (QdLz5\
privateint currentPage; cj4o[l
F=?GV\Tw
/** the begin index of the records by the current 8lyNg w1
BM9:|}\J65
query */ 24po}nrO
privateint beginIndex; Zbr1e5?
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Ax 4R$P.]u
/** The default constructor */
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public Page(){ cR&d=+R&
aI;fNy/K
} )+"(7U<
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/** construct the page by everyPage Pz|}[Cx-
* @param everyPage &Z}}9dd
* */ K<k\A@rv8H
public Page(int everyPage){ |}: D_TX
this.everyPage = everyPage; {qm5H7sL
} "HLh3L~
#4AqWyp#f
/** The whole constructor */ ;xSlRTNT=6
public Page(boolean hasPrePage, boolean hasNextPage, @7sHFwtar?
a~k*Gd(
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int everyPage, int totalPage, u$
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int currentPage, int beginIndex){ KhPDXY]!
this.hasPrePage = hasPrePage; Wt=%.Y(x
this.hasNextPage = hasNextPage; 5r0Sl89J
this.everyPage = everyPage; P#/s5D8
this.totalPage = totalPage; >`n)-8
this.currentPage = currentPage; Va/}|&9
this.beginIndex = beginIndex; q#0yu"<
} tbB.n
j[=P3Z0q
/** +p-S36K~,7
* @return ?' $}k
* Returns the beginIndex. m.U&O=]5
*/
V'AZs;
publicint getBeginIndex(){ (DM8PtZg
return beginIndex; 6a6N$v"
} c-[IgX e
K14{c1
/** Egl1$,e
* @param beginIndex p S!N<;OWr
* The beginIndex to set. ,27=i>>
*/ \qbEC.-K
publicvoid setBeginIndex(int beginIndex){ O.?q8T)n82
this.beginIndex = beginIndex; tTe:Oq
} P1ynCe
+s5Yg,4*
/** 6oGF6C
* @return peU1
t:k?
* Returns the currentPage. =1j`VJU9
*/ c`V~?]I>
publicint getCurrentPage(){ .:;#[Z{-
return currentPage; W0Q;1${
} WoWBZ;+U
N4,!b_1
/** ="[6Z$R
* @param currentPage p B79#4
* The currentPage to set. B=2f-o
*/ 3q1u9`4;
publicvoid setCurrentPage(int currentPage){ f>+:UGmP
this.currentPage = currentPage; u=B,i#>s
}
av!~B,
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/** ;gW?Fnry;
* @return 5,?Au
* Returns the everyPage. ]m""ga
*/ }!Xj{Eoc
publicint getEveryPage(){ 2aGK}sS6
return everyPage; 96CC5
} _ 6'HBE
}MV=t7x9+
/** .Ue1}'v*,
* @param everyPage YS&Q4nv-
* The everyPage to set. 5I@2U vV8
*/ 0t}&32lL&
publicvoid setEveryPage(int everyPage){ '|K408i
this.everyPage = everyPage; Uzd\#edxJ
} V s1Z$HS`
W RVm^
/** *.Ceb%W7C
* @return ZfN%JJOz(
* Returns the hasNextPage. $v+t~b
*/ W%cJ#R[o
publicboolean getHasNextPage(){ 'x!5fAy
return hasNextPage; v/WvT!6V`
} Mi_/
^
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/** )%&~CW+
* @param hasNextPage ]
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* The hasNextPage to set. :*/`"M)'
*/ B>M @ '
publicvoid setHasNextPage(boolean hasNextPage){ @s;qmBX4
this.hasNextPage = hasNextPage; X,h"%S<c#H
} )R'~{;z }
m`Ver:{
/** =%V(n{7=
* @return 7B,axkr
* Returns the hasPrePage. pT` oC&
*/ <) \
publicboolean getHasPrePage(){ G\1\L*+0
return hasPrePage; %^$7z,>;
} 5L4{8X0X8
?
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/** Vyqj)1Z8>
* @param hasPrePage |B;tv#mKD
* The hasPrePage to set. 3B5GsI
*/ ]hL`HP
publicvoid setHasPrePage(boolean hasPrePage){ k*3F7']8
this.hasPrePage = hasPrePage; =
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} @Js^=G2
^%?*u;uU%
/** 3b2[i,m<L
* @return Returns the totalPage. i/%+x-#
* "NgfdLz
*/ d/O~"d
publicint getTotalPage(){ :q0TS>l
return totalPage; 0//?,'.
} =x/Ap1
eI7FbOze
/** %9!,PeRe
* @param totalPage Gb\Nqx(
* The totalPage to set. 5HZ t5="+
*/ #ONad0T;
publicvoid setTotalPage(int totalPage){ #~(VOcRI
this.totalPage = totalPage; S}Q/CT?au
} axSJ:j8
TM1isZ
} +;P8QZK6
+$-@8,F>
.m&JRzzV
2|KgRk|!
*,:>EcDr
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 S~9K'\vO
G>/Gw90E
个PageUtil,负责对Page对象进行构造: GxL;@%B
java代码: `m.).Hda
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,F,\bp }
/*Created on 2005-4-14*/ }Ss]/_t
package org.flyware.util.page; gkJL=,
sw={bUr6G`
import org.apache.commons.logging.Log; [\ M$a|K
import org.apache.commons.logging.LogFactory; \DG
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!\
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/** ] rP^
* @author Joa PgeC\#;9
* G234UjN%
*/ vdn`PS'#
publicclass PageUtil { o=t@83Fh5
JumZ>\'p(
privatestaticfinal Log logger = LogFactory.getLog 3C,G~)=
x
;"}yVV/4
(PageUtil.class); i'w8Li
u3"0K['3
/** =6XJr7Ay8u
* Use the origin page to create a new page MX@t[{ Gg9
* @param page otA59 ;Z
* @param totalRecords #JmVq-)
* @return #DBg8
*/ emhI1
*}
publicstatic Page createPage(Page page, int mv5=>Xc6
L}E~CiL0n
totalRecords){ 7#~v<M6
return createPage(page.getEveryPage(), FeW}tKH
}?KvT$s
page.getCurrentPage(), totalRecords); {X85
} $pKlF0 .
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/** V`c"q.8
* the basic page utils not including exception e-!6m#0
6x'F0{U
handler }ZQ)]Mr
* @param everyPage R`[jkJrc
* @param currentPage :U6"HP+?g-
* @param totalRecords }McqoZ%F
* @return page F@8G,$
*/ _d|CO
publicstatic Page createPage(int everyPage, int IhIz 7.|
xRX2u_f$<
currentPage, int totalRecords){ 1@dB*Jt
everyPage = getEveryPage(everyPage); &d%\&fCm(
currentPage = getCurrentPage(currentPage); ~.Wlv;
int beginIndex = getBeginIndex(everyPage, .tdaj6x
YiO3.+H
currentPage); :w!A_~ w2
int totalPage = getTotalPage(everyPage, *1H8
&
fY4I(~Q
totalRecords); ?*)Q[P5
boolean hasNextPage = hasNextPage(currentPage, Bj=lUn`T:
LD=e Mk:
~
totalPage); Udi
boolean hasPrePage = hasPrePage(currentPage); ,QeJ;U
GM~Ek]9C%
returnnew Page(hasPrePage, hasNextPage, kxanzsSr9
everyPage, totalPage, lZ'WFFWLE
currentPage, NihUCj"
!*?|*\B^I
beginIndex); oimM)Yo
} Vk tc
CN{xh=2qY[
privatestaticint getEveryPage(int everyPage){ %eE0a4^".
return everyPage == 0 ? 10 : everyPage; .E:3I!dH7
} 7es<%H
qkM)zOZ^
privatestaticint getCurrentPage(int currentPage){ =*5< w
return currentPage == 0 ? 1 : currentPage; Cqs+ o^q
} Ke;eI+P[
mo?*nO|-
privatestaticint getBeginIndex(int everyPage, int :R{pV7<O
)ZW[$:wA
currentPage){ I}jem
return(currentPage - 1) * everyPage; %/4_|.8u
} &RHZ7T
eJ%b"H!
privatestaticint getTotalPage(int everyPage, int !X[P)/?b0+
&7XsyDo6
totalRecords){ ri`;
int totalPage = 0; H%b c.c
r j.X"
if(totalRecords % everyPage == 0) n *EGOS
totalPage = totalRecords / everyPage; [[#R ry
else iG ,z3/~v
totalPage = totalRecords / everyPage + 1 ; UQg_y3
#V
A+MG?k>yg
return totalPage; nWes,K6T
} b['v0x
`Frr?.3&-
privatestaticboolean hasPrePage(int currentPage){ Q!!u=}GYK
return currentPage == 1 ? false : true; @#p6C
} ICEyz|
C
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privatestaticboolean hasNextPage(int currentPage, VRZqY7j}g
~dC.,"
int totalPage){ Uc,J+j0F
return currentPage == totalPage || totalPage == y`i?Qo3
'
<?=!&\D
0 ? false : true; e*yl _iW
} bzr QQQ
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} T/.U Mw
[C/{ ru&E
8Vjv #pm
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BCuoFw)
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。 ))dw[Xa
'd|!Hr<2
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 JeN]sK)8x
w59q* 2
做法如下: tLU@&NY`
1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 Uq @].3nf
lcLDCt?
的信息,和一个结果集List: !C|Z+w9Y
java代码: m[%':^vSr
VC0Tqk
C>'G?
/*Created on 2005-6-13*/ teI?.M9r
package com.adt.bo; =''WA:,=h
Wx8:GBM$2
import java.util.List; E=CA Wj\
J[0 5T1
import org.flyware.util.page.Page; KxD/{0F
Lq$ig8V:O7
/** YR? E
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* @author Joa IN@o9pUjV
*/ 7W*a+^
publicclass Result { >kxRsiKV
@/?i|!6
private Page page; "dG N0i
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private List content; A'rd1"K
kYWnaY ^F
/** IU5T5p
* The default constructor rM^2yr7H
*/ )/vom6y*
public Result(){ ?hGE[.(eh]
super(); `)5WA{z
} =.CiKV$E
$./aKJ1B
/** NtM ?Jh
* The constructor using fields 71 %$&6
* `"[qb ?z
* @param page P9qIq]M
* @param content ?>U=bA
*/ pDYJLh-C
public Result(Page page, List content){ @8>bp#x/1
this.page = page; 4_iA<}>|
this.content = content; 7l$
u.[
} L%(NXSfu7
Axns
/** Y%kOq`uT=n
* @return Returns the content. n[gE[kw
*/ P`{$7ST'Hh
publicList getContent(){ ,b&hLht
return content; ZLxa|R7
} -z+,j(@
Z#Kf%x.
/** lya},_WCq
* @return Returns the page. `7w-_o
%
*/ /{`"X_.o
public Page getPage(){ {&>rKCi
return page; +|d]\WlJ
} _"B.V(
C
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/** Sx QA*}N
* @param content ObEz 0Rj
* The content to set. G\BZ^SwE
*/ `j@1]%&z
public void setContent(List content){ Q17dcgd
this.content = content; ~?Ky{jah:^
} QK+,63@D\=
YmaS,Q-
/** H}5WglV.
* @param page )Ln".Bu,
* The page to set. YIg43Av
*/ |xcI~ X7Q
publicvoid setPage(Page page){ 9/29>K_
this.page = page; DbH;DcV7
} zaHZ5%{LQD
} RYEZ'<
9/{ zS3h3
#l4T/`u'9!
$~.YB\3
[z2UfHpt~
2. 编写业务逻辑接口,并实现它(UserManager, z``wqK
]5S`y{j1
UserManagerImpl) *PnO$q@`
java代码: 0?>(H(D^/
A_oZSUrR
&N/t%q
/*Created on 2005-7-15*/ n_km]~
package com.adt.service; $N)G:=M!s
`T[@ -
import net.sf.hibernate.HibernateException; IB[$~sGe
R*D<M3
import org.flyware.util.page.Page; Yw3'9m^
4G(7V:
import com.adt.bo.Result; X n!mdR
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/** N~O3KG q
* @author Joa $q@d.Z>;
*/ $C\ETQ@
publicinterface UserManager { zW%Em81Wd
nFEJO&1+
public Result listUser(Page page)throws 0Xh_.PF
<@-O06
HibernateException; .
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} Dd5
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^b+>r
$gBQ5Wd
kKSGC?d
p5fr}#en
java代码: eTS}-
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ls
5iE
/*Created on 2005-7-15*/ ;AEfU^[
package com.adt.service.impl; %f1%9YH
Sf, z
import java.util.List; R#d~a;j
c
3QgX4vq
import net.sf.hibernate.HibernateException; .Ix3wR9
s7 "xDDV
import org.flyware.util.page.Page; 'V:Q :
import org.flyware.util.page.PageUtil; V^2_]VFj
crM5&L9zF
import com.adt.bo.Result; m;OvOc,
import com.adt.dao.UserDAO; A#"Wk]jX
import com.adt.exception.ObjectNotFoundException; YJ _eE
import com.adt.service.UserManager; 6L<:>55
:X;G]B
.
/** uDDa>Ka#+
* @author Joa m+Ye`]
*/ 7s|'NTp
publicclass UserManagerImpl implements UserManager { ff#7}9_mh
Uk?G1]$mL
private UserDAO userDAO; ")|/\ w,
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/** >
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* @param userDAO The userDAO to set. ZLkl:'E_
*/ @k?vbq
publicvoid setUserDAO(UserDAO userDAO){ T+0=Ou"N
this.userDAO = userDAO; 0WUBj:@g
} T`bYidA
jdxHWkQ
/* (non-Javadoc) d9f7 &
* @see com.adt.service.UserManager#listUser w+br)
uk):z$x
(org.flyware.util.page.Page) ;p(h!4E
*/ N"S`9B1eD(
public Result listUser(Page page)throws r6DLShP-Ur
|#TU"$;
HibernateException, ObjectNotFoundException { s.2f'i+
int totalRecords = userDAO.getUserCount(); /G||_Hc
if(totalRecords == 0) nQF&^1n
throw new ObjectNotFoundException @Kpm&vd(
U%q)T61
("userNotExist"); Q
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page = PageUtil.createPage(page, totalRecords); Q"QRF5Ue
List users = userDAO.getUserByPage(page); F\:~^`
returnnew Result(page, users); I5Vn#_q+b
} (t4i&7-
n ay\)
} uF7vba$
0,Ds1y^
W{6QvQD8
MP%#)O6
ng1E'c]0@
其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 N1 t4o~
V}E['fzBFV
询,接下来编写UserDAO的代码: "#d$$ 8
3. UserDAO 和 UserDAOImpl: i fsh(^N
java代码: >q}3#TvP@
T^A(v(^D
{]CZgqE{
/*Created on 2005-7-15*/ A(y6]E!
package com.adt.dao; XcJ5KTn
K;
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import java.util.List; e{)giJY9
i$Y#7^l%k
import org.flyware.util.page.Page; l)u%`Hcn
lu#a.41
import net.sf.hibernate.HibernateException; RD`|Z~:q:K
6uRE9h|
/** HhbBt'fH
* @author Joa {cdICWy(F3
*/ !yNU-/K
publicinterface UserDAO extends BaseDAO { vl (``5{
4H8r[
publicList getUserByName(String name)throws (:iMs)
iO{
"aGmv9\
HibernateException; }?m0bM
v`h>5#_[
publicint getUserCount()throws HibernateException; ~kc#"^sJ
R@\fqNq
publicList getUserByPage(Page page)throws [}L?EM
4 H 6t" X
HibernateException; O"\4[HE^
7gX32r$%V
} a~KtH;7<
dsIbr"m
8@3=SO
`^#Rwn#
^gVQ6=z%
java代码: b: (+d"S
7w73,r/D8A
J.iz%8
/*Created on 2005-7-15*/ c&;" Y{
package com.adt.dao.impl; c!@|yE,
A
rE~6X
import java.util.List; b^R:q7ea
ww|fqx?
import org.flyware.util.page.Page; 0A}XhX
L|[i<s;
import net.sf.hibernate.HibernateException; U&"L9o`2
import net.sf.hibernate.Query; C6ql,hR^h`
CH7a4qL`
import com.adt.dao.UserDAO; 1c,#`\Iikd
f@sC~A. 9\
/** J>X@g;
* @author Joa F6vsU:TfB
*/ kQI'kL8>
public class UserDAOImpl extends BaseDAOHibernateImpl %LnLB
fBX@
MedC
implements UserDAO { b GSj?t9/
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/* (non-Javadoc) L#`X
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* @see com.adt.dao.UserDAO#getUserByName MTt8O+J?P~
9>{ml&$
(java.lang.String) Kmx4bp4
*/ cLyf[z)W
publicList getUserByName(String name)throws `K VSYC
pg5W`4-F
HibernateException { $`OyGeq"T
String querySentence = "FROM user in class o2|#_tGNUy
.XpuD,^;@
com.adt.po.User WHERE user.name=:name"; N-N]BS6
Query query = getSession().createQuery [fCnq
<=CABWO.
(querySentence); U/FysN_N!
query.setParameter("name", name); |i
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return query.list(); ;(mNjxA
} *X3wf`C?
6b*xhu\
/* (non-Javadoc) N/>:})dav
* @see com.adt.dao.UserDAO#getUserCount() i&(1<S>P
*/ x7B;\D#`i/
publicint getUserCount()throws HibernateException { a2?@OJ
int count = 0; R|@~<