Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 ^h6$>n5
R =9~*9
detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 ''OInfd?
wYO"znd
据这一功能,我设计了通用的抽象Bean基类和分页类支持,代码来 b}Hl$V(uD
t)gi.Ed1"L
自于Quake Wang的javaeye-core包的相应类,然后又做了很多修改 yC 7Vb
P
QK!:q{
。 lAn+gDP
Q|=
Q]$d
分页支持类: G9n /S=R?
=PFR{=F
java代码: !\#Wk0Ku
b?]ly(
Ep\
package com.javaeye.common.util; l P$r
|[owNV>
import java.util.List; 7XVzd]jH
ocl47)
publicclass PaginationSupport { yI.}3y{^5
nJ*mEB
publicfinalstaticint PAGESIZE = 30; '`]n_$f'
H/Ec^Lc+_
privateint pageSize = PAGESIZE; Bq~hV;9nf
e@:P2(WWl
privateList items; ?l,
X!o6
qH
h'l;.
privateint totalCount; 0i*'N ch#i
w~$c= JO#
privateint[] indexes = newint[0]; S@}B:}2
rI<nUy P?
privateint startIndex = 0; ?wLdW1&PpX
:Dk@?o@2;C
public PaginationSupport(List items, int r!.+XrYg
E +Ujpd
totalCount){ OS"{"P
setPageSize(PAGESIZE); ^s2m\Q(
setTotalCount(totalCount); _[TH@fO6:
setItems(items); 'o/N}E!Pt
setStartIndex(0); P('t6MVlT
} "s>fV9YyZ
2fzKdkJhe
public PaginationSupport(List items, int %R5Com
fys5-1@-p
totalCount, int startIndex){ %[Zqr;~l
setPageSize(PAGESIZE); ^)OZ`u8
setTotalCount(totalCount); r}oURy,5
setItems(items); 4FIV
setStartIndex(startIndex); 3"'# |6O9
} bvipbf[m<
nxyjL)!)0
public PaginationSupport(List items, int /i{tS`[F2a
~IlF*Zz#}6
totalCount, int pageSize, int startIndex){
:vYtMp
setPageSize(pageSize); >,>;)B@J
setTotalCount(totalCount); aJ6#=G61l
setItems(items); s-C!uq
setStartIndex(startIndex); cXk6e.Uz
} ha|@ Xp
.Na&I)udX.
publicList getItems(){ S9HBr
return items; -}Cc"qm
} I%}L@fZ
<H5n>3#pH
publicvoid setItems(List items){ (ve+,H6w\
this.items = items; 9Hf*cQ
} cxXbo a
<I7(eh6d
publicint getPageSize(){ Pgn_9Y?<
return pageSize; x?, ~TC4
} p-5Pas
T[0V%Br{d+
publicvoid setPageSize(int pageSize){ i>Z|6 5
this.pageSize = pageSize; 6R;)
} 8W~lU~-
4 ,p#:!
publicint getTotalCount(){ klgv{_b
return totalCount; Ro'jM0(KE
} Md8(`@`o
|Du,UY/
publicvoid setTotalCount(int totalCount){ >vlQ|/C
if(totalCount > 0){
?. zu2
this.totalCount = totalCount; bK3B3r#$
int count = totalCount / |}_gA
|EF>Y9
pageSize; HUj+-
if(totalCount % pageSize > 0) =m`l%V[
count++; CE~r4
indexes = newint[count]; f%2%T'Q
for(int i = 0; i < count; i++){ hzaLx8L
indexes = pageSize * :3*`IB !
)fNGB]%
i; q}>M& *
} 3YR *
^
}else{ 6#<Ir @z
this.totalCount = 0; c}\
'x5:o
} U?8i'5)
} $ "Afy)Ir
fO*)LPen.z
publicint[] getIndexes(){ VR"u*
return indexes; hIR@^\?
} qh%i5Mu
oG!6}5
publicvoid setIndexes(int[] indexes){ "?$L'!bM@
this.indexes = indexes; 6|QTS|!
} /sy-;JDnsu
csYy7uzi
publicint getStartIndex(){ r+o_t2_b*
return startIndex; X*0k>j
} );=Q] >
mv{<'
publicvoid setStartIndex(int startIndex){ R;WW
f.#
if(totalCount <= 0) J;S-+
this.startIndex = 0; w{3ycR
elseif(startIndex >= totalCount) SGt5~Txj
this.startIndex = indexes O47PkP8
jQ6Xr&}
[indexes.length - 1]; vruD U#
elseif(startIndex < 0) 19'5Re&
this.startIndex = 0; _0K.Fk*(!
else{ f6Ml[!aU
this.startIndex = indexes =tq1ogE
6VC-KY
[startIndex / pageSize]; 4iwf\#
} v{r1E]rY
} iecWa:('
/^Y[*5
publicint getNextIndex(){ GjEqU;XBi
int nextIndex = getStartIndex() + G%;kGi`m
IAYACmlN&
pageSize; ]a M-p@
if(nextIndex >= totalCount) ((qGh>*
return getStartIndex(); vTdUuj3N
else sJOV2#r
return nextIndex; B;V5x/
} ~Po<(A}`f
4h;4!I|
publicint getPreviousIndex(){ n,CD
int previousIndex = getStartIndex() - Yr=8!iR$
Y17hOKc`
pageSize; 8&%Cy'TIz4
if(previousIndex < 0) JRXRi*@
return0; Apmw6cc
else K U$`!h
return previousIndex; /HZv
} RpYcD
n&$/Q$d&
} Bhe{L?}0
fH[Wkif
G{+2xN
a(
z|I0-1tAK
抽象业务类 hO3{
java代码: rEM#D]k
CW p#^1F
[1SMg$@<
/** [9AM\n>g
* Created on 2005-7-12 G>K@AW#
*/ s6n`?,vw
package com.javaeye.common.business; Z7z]2v3}c
yQ%"U^.m
import java.io.Serializable; ~x#vZ=]8
import java.util.List; I3(d<+M
($8t%jVWJJ
import org.hibernate.Criteria; psUE!~9,
import org.hibernate.HibernateException; ^_W40/c3
import org.hibernate.Session; m*Cu-6&qd
import org.hibernate.criterion.DetachedCriteria; 4-^[%&>}
import org.hibernate.criterion.Projections; "VTF}#Uo
import 4MLH+/e
y'
[LNp V
org.springframework.orm.hibernate3.HibernateCallback; 50$W0L$
import z:}nBCmLV
+qy6d7^
org.springframework.orm.hibernate3.support.HibernateDaoS Ilq=wPD}j
R\O.e
upport; :c=.D;,
t,<UohL|z
import com.javaeye.common.util.PaginationSupport; {v,)G)obWw
:FHA]oec1
public abstract class AbstractManager extends J'Sm0
5k$vlC#[H
HibernateDaoSupport { r,;\/^ u*
Zh'&-c_J
privateboolean cacheQueries = false; .<YcSG
Qihdn66
privateString queryCacheRegion; Fr [7
x?sI;kUw8
publicvoid setCacheQueries(boolean qZ+H5AG2
D*2\{W/
cacheQueries){
rLv;Y
this.cacheQueries = cacheQueries; ,;jGJr
} {/ 2E*|W~I
{HrZ4xQnpV
publicvoid setQueryCacheRegion(String 3WUH~l{UJ
|5MbAqjzC
queryCacheRegion){ ;Gd~YGW^#
this.queryCacheRegion = :L:&t,X
:dwt1>
queryCacheRegion; {x@|VuL=
} $NG++N
+ts0^;QO2{
publicvoid save(finalObject entity){ |.U)ll(c
getHibernateTemplate().save(entity); h"W8N+e\
} i$uN4tVKT
eUBrzoCO
publicvoid persist(finalObject entity){ @_yoX(.E&
getHibernateTemplate().save(entity); /,tAoa~FA
} (S/F)?
'jfRt-_-
publicvoid update(finalObject entity){ j-b* C2l
getHibernateTemplate().update(entity); &c%Y<1e`%
} 0XU}B\'<
n}n EcXb
publicvoid delete(finalObject entity){ 8@\7&C(g17
getHibernateTemplate().delete(entity); eV};9VJ$F
} l=={pb
>)**khuP7
publicObject load(finalClass entity, ELD!{bMT
|ys0`Vb=$
finalSerializable id){ tWPO]3hW
return getHibernateTemplate().load \>Zvev!s
0L-!!
c3
(entity, id); UKBJ_r
} m$2<`C=
Ol/N}M|3
publicObject get(finalClass entity, nk=$B(h
g@ith&*=h
finalSerializable id){ ip:LcG t
return getHibernateTemplate().get \_BkY%a
{6Au3gt/
(entity, id); 'MxSd( T
=
} x3G :(YfO
L^`}J7r
publicList findAll(finalClass entity){ CNrIIsJ
return getHibernateTemplate().find("from CI7A#
6-
\2v"YVWw
" + entity.getName()); $'wq1u
} t?eH'*>
5K%Wa]W
publicList findByNamedQuery(finalString _e<o7Y@_
!q"cpL'4
namedQuery){ b^CNVdo'
return getHibernateTemplate P:xT0gtt
k!L@GQ
().findByNamedQuery(namedQuery); KOSM]c\H
} 6"
B%)0
A*yi"{FLi
publicList findByNamedQuery(finalString query, Ri7((x]H"
45 >XKr.%
finalObject parameter){ ^s :y/Kd
return getHibernateTemplate 8{
c !).
_2ef LjXQ
().findByNamedQuery(query, parameter); Tl("IhkC
} 6;b9swmh
OS-f(qXd+
publicList findByNamedQuery(finalString query, ?}P5p^6
:D:DnVZ-[@
finalObject[] parameters){ b7:0#l$
return getHibernateTemplate _.)eL3OF
5g5'@vMN
().findByNamedQuery(query, parameters); 5jcte<
5I_
} n~IVNB*
LRb,VD:/Y
publicList find(finalString query){ @* ust>7
return getHibernateTemplate().find {p<Zbm.
8(U{2B8>\%
(query); gXFWxT8S
} *?p|F&J
30j|D3-
publicList find(finalString query, finalObject i'/m4 !>h
2\D8.nQr
parameter){ `TLzVB-j3
return getHibernateTemplate().find f:JlZ&
o2H1N~e#c
(query, parameter); KFRw67^
} J4$!
68
+a@GHx4-
public PaginationSupport findPageByCriteria j{++6<tr
r),PtI0X
(final DetachedCriteria detachedCriteria){ 3INI?y}t
return findPageByCriteria )(M7lq.e7
8T[
6J{|C
(detachedCriteria, PaginationSupport.PAGESIZE, 0); <=K qcHb
} Dh|w^Q
_o3e]{
public PaginationSupport findPageByCriteria W~n.Xeu{C
6=_~0PcY
(final DetachedCriteria detachedCriteria, finalint 7j<e)"
uYI@9U
startIndex){ "8f?h%t
return findPageByCriteria Wzq>JNny
6]cryf&b
(detachedCriteria, PaginationSupport.PAGESIZE, KxGX\
/a9!Cf
startIndex); Xf'=+f2p
} "Y:/=
Gx
l~:v
(R5
public PaginationSupport findPageByCriteria (46 {r}_O
.1 )RW5|c
(final DetachedCriteria detachedCriteria, finalint ;zTuKex~
Ol/\t
pageSize, 6aO2:|:yP
finalint startIndex){ +\
_{x/u1
return(PaginationSupport) eP1nUy=T
5/><$06rq
getHibernateTemplate().execute(new HibernateCallback(){ ^?"\?M1
publicObject doInHibernate bp<^R
l(W[_ D
(Session session)throws HibernateException { 4Aes#{R3v
Criteria criteria = ,Dmc2D
]:]H:U]p
detachedCriteria.getExecutableCriteria(session); +]xFoH
int totalCount = %hS|68pN6
e'*HS7g
((Integer) criteria.setProjection(Projections.rowCount >B -q@D
YB))S!;Ok
()).uniqueResult()).intValue(); AbwbAm+
criteria.setProjection od<b!4k~s
+Lm4kA+aE5
(null); lU]un&[N
List items = rsNf$v-*
J:dof:q
criteria.setFirstResult(startIndex).setMaxResults 0X|_^"!
GV|9H]_,I
(pageSize).list(); shC;hR&;
PaginationSupport ps = :t$aN|>y
ihe(F7\U
new PaginationSupport(items, totalCount, pageSize, 9v)%dO.
bKVj [r8D~
startIndex); %y[1H5)3<
return ps; A?!I/|E^;
} 7Ey#u4Q
}, true); j`*N,*ha
} r{Rg920
yTM3^R(
public List findAllByCriteria(final V3N0Og3
cR{>IH 4^
DetachedCriteria detachedCriteria){ 4'pS*v
return(List) getHibernateTemplate :PYtR
[U
=Uo*
().execute(new HibernateCallback(){ l.)}t)my}
publicObject doInHibernate o}Cq.[G4k
+t)n;JHN
(Session session)throws HibernateException { kYwb -;
Criteria criteria = 1$lh"fHU
1nhtM
detachedCriteria.getExecutableCriteria(session); Zi$ziDz&
return criteria.list(); *ZSdl0e
} A~(l{g
}, true); 2(!fg4#+
} KU9Z"9#
#Doq P:
public int getCountByCriteria(final SjEAuRDvUz
|+IZS/W"
DetachedCriteria detachedCriteria){ J'mDU
Integer count = (Integer) E4.SF|=x
Bvjl-$m!v
getHibernateTemplate().execute(new HibernateCallback(){ F51.N{'
publicObject doInHibernate C_fY %O
V,v[y\
(Session session)throws HibernateException { f7de'^t9
Criteria criteria = zzGYiF?
I8Vb-YeS
detachedCriteria.getExecutableCriteria(session); <3X7T6_:@
return Rhzn/\)|
)u ?' ;
criteria.setProjection(Projections.rowCount O%!5<8Xrb
u'A#%}3
()).uniqueResult(); 9a$56GnW1
} {NM+Oj,~'
}, true); )QiQn=Ce
return count.intValue(); ,SlN zR
} 0o&MB
Dp
} =4!nFi
"O>n@Q|
1r)kR@!LNG
YA(@5CZ
$K~LM8_CKy
oT95^y\9
用户在web层构造查询条件detachedCriteria,和可选的 E N^Uki`
RuW!*LI
startIndex,调用业务bean的相应findByCriteria方法,返回一个 |dE
-^"_
>cmE
t
PaginationSupport的实例ps。 xgsjm))
"$HbK
@]!h
ps.getItems()得到已分页好的结果集 [f~N_G6I^o
ps.getIndexes()得到分页索引的数组 o/cjXun*
ps.getTotalCount()得到总结果数 ^,Ydr~|T
ps.getStartIndex()当前分页索引 M.}7pJ7f
ps.getNextIndex()下一页索引 #b0{#^S:
ps.getPreviousIndex()上一页索引 8t"~Om5sG
@MR?6 n*k
!hxIlVd{
X*oMFQgP
*DI)?
v`q\6i[-
XkKC!
连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 QvPD8B
wt}9B[
,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 eEc4bVQa
1[nG}
一下代码重构了。 ]Al;l*yw
7XrfuG*L$
我把原本我的做法也提供出来供大家讨论吧: '8FC<=+p[
woH)0v
首先,为了实现分页查询,我封装了一个Page类: =/Aj
java代码: %T`U^Pnr
jMBiaX`F
l?E a#
/*Created on 2005-4-14*/ SJ'
%
^
package org.flyware.util.page; 7[v%GoE
H/F+X?t$0
/** q]&.#&h
* @author Joa ]ekk }0
* 3*_fzP<R
*/ DmqX"x%P
publicclass Page { zRl~^~sY
DLPUqKL]
/** imply if the page has previous page */ +';>=hha
privateboolean hasPrePage; {0\,0*^p
1r[@(c0
/** imply if the page has next page */ )QKf7 [:
privateboolean hasNextPage; {C*\O)Gep
u9-nt}hGYM
/** the number of every page */ 6&v?)o
privateint everyPage; Tn-C>=tR~%
DdV'c@rq+
/** the total page number */ V%
TH7@y
privateint totalPage; F-Z%6O,2
?^HfNp9
/** the number of current page */ OIb
privateint currentPage; ]J1S#Q5'
ig"uXs
/** the begin index of the records by the current d=.2@Ry
3Q}$fQ&S
query */ !,$i6gm
privateint beginIndex; 1nj(hg
=#5D(0Ab
<T?oKOD ]
/** The default constructor */ OqhD7 +
public Page(){ 6V9doP ]i
&`|:L(+
} n
?[/ufl
VUU]Pu &
/** construct the page by everyPage \79X{mcd
* @param everyPage *2"6fX[
* */ rk2xKm^w
public Page(int everyPage){ }|)R
this.everyPage = everyPage; 2 mjV~
} s)A<=)w/e
%u{W7
/** The whole constructor */ JD>d\z2QC
public Page(boolean hasPrePage, boolean hasNextPage, [ Mg8/Oy
2pHR_mrb
,n,RFa
int everyPage, int totalPage, I 1d0iU
int currentPage, int beginIndex){ Eq%@"-mo
this.hasPrePage = hasPrePage; D,l,`jv*
this.hasNextPage = hasNextPage; %9C@ Xl
this.everyPage = everyPage; _Yb_D/
this.totalPage = totalPage; ~0"p*?^
this.currentPage = currentPage; N8cAqr
this.beginIndex = beginIndex; 5}ie]/[|
} *TW=/+j
KP;(Q+qTx
/** Huw\&E
* @return }'"Gr%jf(
* Returns the beginIndex. 0x2!<z
*/ 7"X>?@
publicint getBeginIndex(){ n]W_e
return beginIndex; w^k;D,h
} }]1BO
T<yP* b2E
/** l|`9:H
* @param beginIndex zZ-wG
* The beginIndex to set. -a Gcf]6
*/ f},oj4P\
publicvoid setBeginIndex(int beginIndex){ ^he=)rBb?
this.beginIndex = beginIndex; <<A`aU^fX
} Wx'Kp+9'
+eX)48
/** S&C1 TC
* @return X8eJ4%
* Returns the currentPage. wle@vCmr
*/ fBtm%f
publicint getCurrentPage(){ 8{U-m0v
return currentPage; FxG7Pk+=
} 6Z?j AXGSq
@xsP5je]
/** {Ee>n^1
* @param currentPage `?\tUO2_T
* The currentPage to set. {)f~#37
*/ a\uie$"cr]
publicvoid setCurrentPage(int currentPage){ aFiCZHohw
this.currentPage = currentPage; Hk_y/97OO
} Vpfp}pL
#BK 9 k>i
/** xynw8;Y,
* @return I7 QCYB|
* Returns the everyPage. h<l1]h+x
*/ E{xVc;t
publicint getEveryPage(){ XALI<ZY
return everyPage; 3XiO@jzre
} =!Vf
g o5]<4`r
/** F-(dRSDNM
* @param everyPage SQsSa1
* The everyPage to set. %,@vWmn
*/ R`Aj|C
z
publicvoid setEveryPage(int everyPage){ wCs3:@UH
this.everyPage = everyPage; 7z6b@$,
} \ A1uhHP!
fHrt+_Zn|
/** YIt9M,5/Q
* @return M
x5`yT7
* Returns the hasNextPage. %HQ.|
*/ FFhtj(hVgc
publicboolean getHasNextPage(){ 1
"TVRb
return hasNextPage; =6FUNvP#8
} z><5R|Gf
o{v&.z
/** HC {XX>F^
* @param hasNextPage +^aFs S
* The hasNextPage to set. $VG*q
*/ <[aDo%,A
publicvoid setHasNextPage(boolean hasNextPage){ qpoV]#iW
this.hasNextPage = hasNextPage; X#xFFDzN
} %sh>;^58P
&MmU
/** Hi!Jj
* @return 80}+MWdo
* Returns the hasPrePage. "}WJd$
*/ ~Vh(6q.oT
publicboolean getHasPrePage(){ .Hhh i
return hasPrePage; pN6%&@) =
} x"kjs.d7[<
J;t 7&Zpe
/** }F6<w{|
* @param hasPrePage {>3\N0e5
* The hasPrePage to set. |s7`F%
*/ )'4P.>!!aQ
publicvoid setHasPrePage(boolean hasPrePage){ rsn.4P=
this.hasPrePage = hasPrePage; (w(
} {n3EGSP#
uy _wp^
/** cxeghy:;U
* @return Returns the totalPage. 3:/'t{ ^B
* xVB;s.'!
*/ {3a&1'a0g
publicint getTotalPage(){ XKL3RMF9r
return totalPage; 3gWvmep1
} aIy*pmpD=
kB:Uu}(=N
/** 1[F3 Z
* @param totalPage sRVIH A,
* The totalPage to set. C-eA8pYY/
*/ -Ue$T{;RoH
publicvoid setTotalPage(int totalPage){ \mM<\-'p
this.totalPage = totalPage; |rw%FM{F
} Jo(`zuLJ
0X8t>#uF
} Eh</? Qv\
s>_V
A$0H
.F>
j!~l,::$"X
Kyt)2p
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 ~\p]~qQ\K
nL@KX>
个PageUtil,负责对Page对象进行构造: :,;K>l^U
java代码: ',3HlOJ:
WFR?fDtE
2I3h
MD0
/*Created on 2005-4-14*/ A,CW_
package org.flyware.util.page; O-]mebTvw
Ft=zzoVKg
import org.apache.commons.logging.Log; 4!Z5og1kn
import org.apache.commons.logging.LogFactory; onCKI,"
+cJy._pi!
/** _iKq~\v2
* @author Joa #&<)! YY5
* #1c]PX
*/ wS+V]`b
publicclass PageUtil { yNW\?Z$@q
I&?Qq k
privatestaticfinal Log logger = LogFactory.getLog k 4/D8(OXw
m42T9wSsx
(PageUtil.class); k$5 s{q
m^' uipa\
/** /-zXM;h
* Use the origin page to create a new page !Bz0^1,L
* @param page xX3'bsN
* @param totalRecords o)6p A^+
* @return rn DCqv!'P
*/ ERwHLA
publicstatic Page createPage(Page page, int bQe^Px5
!.
g71[6<D
totalRecords){ hPq%Lc
return createPage(page.getEveryPage(), i'd2[A.7I
d@w~[b
page.getCurrentPage(), totalRecords); zX5!vaEv
} 6s,uXn
b[z]CP
/** i'stw6*J
* the basic page utils not including exception "G>3QL+O|
_X~87
handler `[o)<<}
* @param everyPage \
w3]5gJZ
* @param currentPage B1]bRxwn?
* @param totalRecords dd2[yKC`
* @return page Y_`- 9'&
*/ '|;X0fD
publicstatic Page createPage(int everyPage, int Bq/:Nd[y
Cg*H.f%Mr
currentPage, int totalRecords){ Pxn,Qw*
everyPage = getEveryPage(everyPage); AM=z`0so
currentPage = getCurrentPage(currentPage); A!1;}x
int beginIndex = getBeginIndex(everyPage, UR:aD_h
:akT 'q#
currentPage); hdTzCfeZ5@
int totalPage = getTotalPage(everyPage, B^).BQ
/0\
mx4u
totalRecords); F~ Lx|)0M
boolean hasNextPage = hasNextPage(currentPage, 0"~i^
d[rv1s>i
totalPage); `y#UJYXQE
boolean hasPrePage = hasPrePage(currentPage); )M2F4[vcb
-OSa>-bzNx
returnnew Page(hasPrePage, hasNextPage, UMX@7a,[3
everyPage, totalPage, 8p[)MiC5W^
currentPage, RK w$- 7O
boG_f@dv(
beginIndex); 26CS6(sn
} Fl(T\-Eu
#c^^=Z
privatestaticint getEveryPage(int everyPage){ A!^q
J#
return everyPage == 0 ? 10 : everyPage; 0p89: I*0
} C]Q8:6b
r(gXoq_w
privatestaticint getCurrentPage(int currentPage){ $1SUU F\.
return currentPage == 0 ? 1 : currentPage; 8QMPY[{
} Sna4wkbS
jt+iv*2N>
privatestaticint getBeginIndex(int everyPage, int a&vY!vx3
},|M9I0
currentPage){ ;;&}5jcV
return(currentPage - 1) * everyPage; ,@5I:X!rR
} +{/
[z7bixN
privatestaticint getTotalPage(int everyPage, int nB .G
k5]j.V2f
totalRecords){ EYA,hc
int totalPage = 0; ^j7azn
,0LU~AGe
if(totalRecords % everyPage == 0) ?IpLf\n-
totalPage = totalRecords / everyPage; 7g3>jh
else $ MC)}l
totalPage = totalRecords / everyPage + 1 ; +
nF'a(
H/}]FmjN
return totalPage;
O#I1V K
} ElUEteZ
1) Zf3Y8
privatestaticboolean hasPrePage(int currentPage){ f5 `g
return currentPage == 1 ? false : true; p)+k=b
} QE7V.
>J_p
={u0_j
W
privatestaticboolean hasNextPage(int currentPage, 8g7<KKw
K<>sOWZ'S
int totalPage){ Po%(~ )S>
return currentPage == totalPage || totalPage == CD8}I85K
|ZQ@fmvL/p
0 ? false : true; C`q@X(_
} A<ynIs<
M'/aZ#
b
YID4w7|
} Tyck/ EO
A=
w9V
P67o{EdK
b6*!ACY
ccL~#c0P7
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。 >]c*'~G&