Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 9;Pu9s[q2
/9+A97{
detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 lZA>L,
\d
b)hOzx
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 3zA=q[C
y]pN=<*h5
自于Quake Wang的javaeye-core包的相应类,然后又做了很多修改 ]6%%X+$7
Q xF8=p
。 `?o1cf A
qv*uM0G6i
分页支持类: 4fu\3A&
~sHZh
java代码: ckjVa\
%M)oHX1p
Cb%.C;q
package com.javaeye.common.util; wz0$g4
fpK0MS]=b
import java.util.List; "p~]m~g
B
mBzOk^
publicclass PaginationSupport { /yw\(|T
h
GA0F9.U
publicfinalstaticint PAGESIZE = 30; &8_f'+i0
9 /Ai(
privateint pageSize = PAGESIZE; C|d!'"p
(_&V9vat=
privateList items; K?Xo3W%K
1[/$ZYk:
privateint totalCount; K]pKe"M
P$6f +{
privateint[] indexes = newint[0]; :YJ7J4
R#7+
privateint startIndex = 0; &X]=Qpl
ptWG@"j/b
public PaginationSupport(List items, int BtpjQNN
n#^?X
totalCount){ 6KCCbg/
setPageSize(PAGESIZE); &v
auLp
setTotalCount(totalCount); nA_
zP4
setItems(items); ;x3 ]4^
setStartIndex(0); J<($L}T*$
} ]~
#+b>
`^&15?Wk
public PaginationSupport(List items, int F'UguC">
Dmm r]~
totalCount, int startIndex){ -0KbdHIKb'
setPageSize(PAGESIZE); [zh4W*K_cq
setTotalCount(totalCount); "\zj][sL
setItems(items); c6Yf"~TD0
setStartIndex(startIndex); S QM(8*:X
} WJY4>7}{B@
R%)2(\
public PaginationSupport(List items, int iA%'
;V
@O<@f8-
totalCount, int pageSize, int startIndex){ #lyM+.T
setPageSize(pageSize); A"BtVy[[9
setTotalCount(totalCount); V6z@"+
setItems(items); v/aPiFlw
setStartIndex(startIndex); T[4[/n>i
} Q/3tg
*_{l
publicList getItems(){ p(H)WD
return items; $&xuVBs
} ||'i\X|[
u1pc5 Y{
publicvoid setItems(List items){ E*r
this.items = items; qr'x0r|<>
} \C+*loLs
s#+"5&!s
publicint getPageSize(){ _d\u!giy
return pageSize; C"U[ b%
} ;*wT,2;
^EC)~HP@C
publicvoid setPageSize(int pageSize){ co$Hi9JE
this.pageSize = pageSize; yBPt%EF
} }rKJeOo^x?
\8>
publicint getTotalCount(){ Fi?32e4KI5
return totalCount; bRK CY6
} '&.)T2Kw
g:uvoMUD
publicvoid setTotalCount(int totalCount){ a+YR5*&[OO
if(totalCount > 0){ -TK|Y"
this.totalCount = totalCount; {8!ZKlB
int count = totalCount / {?@t/.4[W3
F=-uDtQ<N
pageSize; .Ca"$2
if(totalCount % pageSize > 0) "}'8`k+d
count++; :Wyn+
indexes = newint[count]; P0'e"\$
for(int i = 0; i < count; i++){ H}) Dcg3
indexes = pageSize * i14[3bPLk!
7x[LF ^o
i; fCt^FU
} [)Z'N/;0
}else{ zz(!t eBC
this.totalCount = 0; ;NiArcAS!
} W"b&M%y|
} $zk^yumdE
*Fa)\.XX
publicint[] getIndexes(){ laUu"cS
return indexes; 3bbp>7V!
} &Q-[;
H
Z;ZjC*
publicvoid setIndexes(int[] indexes){ w+Z- -@\
this.indexes = indexes; Kcscz,
} %sO Wg.0_
5u2{n rc
publicint getStartIndex(){ XKz;o^1a^
return startIndex; )z2|"Lp
} 5y1or
.-SDo"K.h
publicvoid setStartIndex(int startIndex){ u @{E{
if(totalCount <= 0) pY+.SuM
this.startIndex = 0; 7ei>L]gm%
elseif(startIndex >= totalCount) Q!4i_)rM
this.startIndex = indexes zY7*[!c2
(v|r'B9b
[indexes.length - 1]; BA~a?"HS
elseif(startIndex < 0) T"L0Iy!k;
this.startIndex = 0; Ys"|</;dbj
else{ .dD9&n;#^
this.startIndex = indexes B<|:K\MA
.ocx(_3G
[startIndex / pageSize]; XIr{U5$<6
} 2Pbe~[
} Q)x?B]b-
vOos*&
publicint getNextIndex(){ RL?u n}Qa
int nextIndex = getStartIndex() + G{@C"H[$<
:7 qqjs
pageSize; AuoxZ?V
if(nextIndex >= totalCount) DJmoW
return getStartIndex(); ayV6m
else ;;ER"N
return nextIndex; "KMLk
} YniZ(
~^K
|ZS 57c:
publicint getPreviousIndex(){ =?=)s
int previousIndex = getStartIndex() - ^y:FjQC:
GE%2/z p
pageSize; u~" siH
if(previousIndex < 0) ./5jx2V
return0; :z
B}z^8-
else Sa%zre@
return previousIndex; Gs+\D0o!
} ANckv|&'v
VLf
g[*k
} `@h:_d
6exRS]BI
DZ^=*.
C@*%AY
抽象业务类 ` *>V6B3
java代码: %oAL
g(mxhD!k
zL9VR;q
/** ~}h^38
* Created on 2005-7-12 ,5/V@;i
*/ q.-y)C) ;
package com.javaeye.common.business; _e6a8
?Q@L-H`
import java.io.Serializable; `'uUmyg
import java.util.List; D,MyI#
Ej'
7h~ =v
import org.hibernate.Criteria; Z`rK\Bc
import org.hibernate.HibernateException; >4,{6<|
import org.hibernate.Session; }<SNO)h3
import org.hibernate.criterion.DetachedCriteria; vKU`C?,L
import org.hibernate.criterion.Projections; :bwM]k*$
import =g@R%NDNV
|Dg;(i?
org.springframework.orm.hibernate3.HibernateCallback; {T&v2u#S
import VJ3hC[
$Z/klSEf
org.springframework.orm.hibernate3.support.HibernateDaoS pFpZbU^
(Up'$J}
upport; #e*X0;m
Ejq=*UOP
import com.javaeye.common.util.PaginationSupport; lj)f4zu
mV<i JZh
public abstract class AbstractManager extends NjbwGcH%\
t)ld<9)eB
HibernateDaoSupport { ,E&Bn8L~O
u,fA!
privateboolean cacheQueries = false; M:_!w[NiLp
Xtft*Z
privateString queryCacheRegion; 5^>n5u/
_().t5<
publicvoid setCacheQueries(boolean r:-WzH(Ms
NH'iR!iGo
cacheQueries){ tev QW
this.cacheQueries = cacheQueries; GJX4KA8J
} Y&s2C%jT
k5a\Sq}
publicvoid setQueryCacheRegion(String e$/&M*0\f
h2% J/69
queryCacheRegion){ ;+
G9-
this.queryCacheRegion = ^|aNG`|O
e&2wdH&
queryCacheRegion; J/t!-!
} }w@gj"\H
aM$\#Cx
publicvoid save(finalObject entity){ eaQ90B4
getHibernateTemplate().save(entity); f/ajejYo?,
} 6yI}1g
k,rWa
publicvoid persist(finalObject entity){ _9NVE|c;
getHibernateTemplate().save(entity); ET)>#zp+s
} }kE87x'
J='W+=N
publicvoid update(finalObject entity){ ]NtSu%u
getHibernateTemplate().update(entity); ]ZTcOf
} Ib1e#M3
h~w4, T
publicvoid delete(finalObject entity){ W
(`c
getHibernateTemplate().delete(entity); 7UKYmJk.
} *zy'#`>
x5OC;OQc
publicObject load(finalClass entity, 1kmQX+f
^YKy9zkTl
finalSerializable id){ Ziz=]D_
return getHibernateTemplate().load w>qCg XU3
(S oo<.9~
(entity, id); H0a-(
} , H2YpZk
ANMYX18M
publicObject get(finalClass entity, m"Qq{p|'
^mg*;8eGa
finalSerializable id){ [T`}yb@
return getHibernateTemplate().get PKA }zZ
nLy#|C
(entity, id); DZe}y^F
} 5lTD]d
.^[_V
publicList findAll(finalClass entity){ .$Bwb/a
return getHibernateTemplate().find("from %9o+zg? RJ
o9Sn*p-.
" + entity.getName()); 1zjaR4Tf
} ioV_oR9I
<C<`J{X0
publicList findByNamedQuery(finalString iq6a|XGi
6z?gg3GV
namedQuery){ ~O:
U|&
return getHibernateTemplate gi]ZG
EvE,Dm?h
().findByNamedQuery(namedQuery); v7IzDz6gF
} SMoz:J*Q(
f-g1[!"F
publicList findByNamedQuery(finalString query, 6GYtY>
([ dT!B#aH
finalObject parameter){ %6ub3PLw8
return getHibernateTemplate \ZD[!w7
\DA$6w\\
().findByNamedQuery(query, parameter); \Hwg) Uc{
} F98i*K`"
?t rV72D
publicList findByNamedQuery(finalString query, `.=sTp2rbc
Z0ReWrl;`
finalObject[] parameters){ ~ y;y(4<
return getHibernateTemplate jxw_*^w"
t`G)b&3_O
().findByNamedQuery(query, parameters); :eOR-}p'
} #SkX@sl@
8g*hvPc
publicList find(finalString query){ ^Y04qeRd
return getHibernateTemplate().find Ht[{ryTxu
MJ\[Dt
(query); ?_q+&)4-o
} W
f@t4(i
ALGgAX3t
publicList find(finalString query, finalObject d~*TIN8Ke~
{8@\Ij
parameter){ tNnyue{p
return getHibernateTemplate().find !e3YnlE
u+D[_yd^
(query, parameter); lIf(6nm@
} zgKY4R{V
v-`h>J!Nx
public PaginationSupport findPageByCriteria dDtFx2(R
9"sDm}5%
(final DetachedCriteria detachedCriteria){ t`|,6qEG
return findPageByCriteria V U~Dk);Bv
$h28(K%
(detachedCriteria, PaginationSupport.PAGESIZE, 0); "0&N}
} G'x .NL
'v&}(
public PaginationSupport findPageByCriteria S>Z|)I
pOga6'aB)
(final DetachedCriteria detachedCriteria, finalint >UHa
#S5`Pd!I
startIndex){ -<N&0F4|*
return findPageByCriteria o a<q /
"T6#
(detachedCriteria, PaginationSupport.PAGESIZE, D59T?B|BdD
Zk?
=
startIndex); QH@>icAb
} .px:e)iW
cA;js;x@
public PaginationSupport findPageByCriteria uDuF#3
+"
o-eKAkh
(final DetachedCriteria detachedCriteria, finalint ^_>!B)
Q\kub_I{@
pageSize, Sm|(
finalint startIndex){ V#83!
return(PaginationSupport) +F@_Es<6
`UzVS>]l[+
getHibernateTemplate().execute(new HibernateCallback(){ rdJB*Rlkh
publicObject doInHibernate 5bX6#5uP1
ii4B?E
(Session session)throws HibernateException { I&]G
Criteria criteria = X-JV'KE}^z
.%xzT J=!
detachedCriteria.getExecutableCriteria(session); %_gho
int totalCount = |M5-5)
68t}w^=
((Integer) criteria.setProjection(Projections.rowCount j+^L~, S
)\ 0F7Z
()).uniqueResult()).intValue(); H{fM%*w
criteria.setProjection 6)*xU|fU
>HTbegi
(null); IcF@F>>
List items = /-Qv?"
p25Fn`}H
criteria.setFirstResult(startIndex).setMaxResults +,flE=5]s
8 i0
(pageSize).list(); hW2.8f$
PaginationSupport ps = kv?|'DN
~&VN_;j_
new PaginationSupport(items, totalCount, pageSize, raB+,Oi$G
IazkdJX~
startIndex); 2x}6\t
return ps; SUdm 0y
} }e{qW
}, true); e!x6bR9EZ
} BWq/TG=>
%XRN]tsu
public List findAllByCriteria(final FGanxv@15
t#~?{i@m
DetachedCriteria detachedCriteria){ mLwY]2T"
return(List) getHibernateTemplate OtUrGQP
4%ZM:/
().execute(new HibernateCallback(){ FJS'G^
publicObject doInHibernate N:BL=}V
6rDfQ`f\p
(Session session)throws HibernateException { iI?{"}BZ
Criteria criteria = [aW =
2qj{n+
detachedCriteria.getExecutableCriteria(session); a/:XXy |
return criteria.list(); %w"nDu2Gcv
} g`,AaWlF
}, true); 'fW#7W
} \7 a4uc
lF4u{B9DM
public int getCountByCriteria(final S`q%ypy
_a'A~JY
DetachedCriteria detachedCriteria){ Np,2j KF(
Integer count = (Integer) >)4YP*qIPb
le
.'pP@
getHibernateTemplate().execute(new HibernateCallback(){ Wd 2sh
publicObject doInHibernate q~Jq/E"f
>J>V%
7
(Session session)throws HibernateException { v.g"{us
Criteria criteria = %|IUq jg
H5xzD9K;/C
detachedCriteria.getExecutableCriteria(session); x0+glQrNN
return LI
W*4r!
iS: #o>
criteria.setProjection(Projections.rowCount Faac]5u:*
"QY1.:o<(
()).uniqueResult(); S%6U~@hig
} [_!O<z_sB
}, true); E`D%PEps+
return count.intValue(); 4<v;1
} >P(`MSc
} FjKq%.=#
(xT*LF+
VXKT\9g3A
Re[:qLa]
Q:o7G|C
^%[F8\}XPJ
用户在web层构造查询条件detachedCriteria,和可选的 <Oz66bTze
W|R-J
startIndex,调用业务bean的相应findByCriteria方法,返回一个 *HlDS22
96Zd M=
PaginationSupport的实例ps。 ltA/
e3(<8]`b[
ps.getItems()得到已分页好的结果集 a(x?fa[D
ps.getIndexes()得到分页索引的数组 v3^|"}\q5
ps.getTotalCount()得到总结果数 8Qrpa o
ps.getStartIndex()当前分页索引 .iv3q?8.b
ps.getNextIndex()下一页索引 A WJWtUa
ps.getPreviousIndex()上一页索引 {d!Y3+I%G
^ddO&!U
<^><3U`
bLS&H[fK
Wmz`&