Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 B:SRHd{*Wu
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 Yp$lc^)c>
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据这一功能,我设计了通用的抽象Bean基类和分页类支持,代码来 _;9)^})$
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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 7UiU3SUcg
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分页支持类: %$Uw]a
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java代码: #=2~MXa@z7
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package com.javaeye.common.util; wrWWXOZ4
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import java.util.List; rx<fjA%
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publicclass PaginationSupport { te_D
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publicfinalstaticint PAGESIZE = 30; iD9GAe}x
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privateint pageSize = PAGESIZE; [Fe5a
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privateList items; &7cy9Z~m
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privateint totalCount; qQQ~[JL
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privateint[] indexes = newint[0]; 8V@3T/}
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privateint startIndex = 0; JyV"jL
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public PaginationSupport(List items, int 4r %NtXAa
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totalCount){ }Q*8QV
setPageSize(PAGESIZE); !GO4cbdQ
setTotalCount(totalCount); rd6?;K0
setItems(items); ^K8Ey#T
setStartIndex(0); fz%urbJR
} <7qM;)g
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public PaginationSupport(List items, int d)LifsD)
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totalCount, int startIndex){ N.uw2Y%
setPageSize(PAGESIZE); @f5X
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setTotalCount(totalCount); '_2~8w
setItems(items); (%".=x-
setStartIndex(startIndex); _d:l1jD
} 0h* AtZv_
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public PaginationSupport(List items, int SOd(& >
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totalCount, int pageSize, int startIndex){ \'shnzs
setPageSize(pageSize); RszqDm
setTotalCount(totalCount); mZm wCS8
setItems(items); yPW?%7 h
setStartIndex(startIndex); d+l@hgz~
} i-$]Tg
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publicList getItems(){ ) "'J]6
return items; 3(X"IoNQ
} TRa|}JaI"
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publicvoid setItems(List items){ AFyf7^^k
this.items = items; @hp@*$#& 9
} t!v#rn[
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publicint getPageSize(){ \7jK6;R<
return pageSize; S'q (Qo
} M,zUg_ @
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publicvoid setPageSize(int pageSize){ @#;2P'KL
this.pageSize = pageSize; "??$yMW
} YjAwt;%-D
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publicint getTotalCount(){ xwq {0jY
return totalCount; ry0P\wY}
} _3.=| @L
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publicvoid setTotalCount(int totalCount){ >yiK&LW^?
if(totalCount > 0){ p{gJVP#l'Z
this.totalCount = totalCount; @-)jU!
int count = totalCount / l!5fuB8
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pageSize; R^4JM,v9x`
if(totalCount % pageSize > 0) iLD}>=
count++; K_;'-B
indexes = newint[count]; B*W)e$
for(int i = 0; i < count; i++){ 1%g%I8W%
indexes = pageSize * HJ~0_n&
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i; 5o- WA1
} ):-\TVz~
}else{ Pv@Lx+k
this.totalCount = 0; A%(t' z
} EdR1W~JZ
} SHWD@WLE4
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publicint[] getIndexes(){ AUBZ7*VO
return indexes; dz_~_|
} 3
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publicvoid setIndexes(int[] indexes){ gqw
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this.indexes = indexes; 4Cm+xAXG
} l7vU{Fd-h^
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publicint getStartIndex(){ apmZ&Ab
return startIndex; 4b5'nu
} .Aj4?AXWc
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publicvoid setStartIndex(int startIndex){ B bP&-c
if(totalCount <= 0) bMU0h,|]
this.startIndex = 0; O S?S$y
elseif(startIndex >= totalCount) f~a]og5|G
this.startIndex = indexes m6+4}= Cn
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[indexes.length - 1]; KF!?;q0J
elseif(startIndex < 0) 3pU/Zbb,:
this.startIndex = 0; ,.6)y1!
else{ u?xXZ]_u-
this.startIndex = indexes [cfKvROG
,;%F\<b
[startIndex / pageSize]; Z2@_F7cXt
} #" &<^
} )+L.$h
LKX; ^
publicint getNextIndex(){ 7^bde<0
int nextIndex = getStartIndex() + fC|NK+Xd`
pXPLTGY<R+
pageSize; X7."hGu@
if(nextIndex >= totalCount) + 0DPhc
return getStartIndex(); VUd=|$'J
else jt5:rWB
return nextIndex; qL;u59
} nA1059B
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publicint getPreviousIndex(){ @a~GHG[x
int previousIndex = getStartIndex() - vHmsS\\~9
d,y%:F 4
pageSize; +5<]s+4T
if(previousIndex < 0) B QxU~s
return0; 1^v?Ly8
else <13').F
return previousIndex; #^i.[7p
} =CqZ $
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} ,'}qLor
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抽象业务类 GeydVT-
java代码: f=,(0ygt/
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/** 8n'"RaLQ8
* Created on 2005-7-12 XLq%nVBM8\
*/ 2N/4.
package com.javaeye.common.business; {3H)c^Q
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import java.io.Serializable; 4z*An}ol]
import java.util.List; ;;{!wA+"D
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import org.hibernate.Criteria; 77?D
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import org.hibernate.HibernateException; Oye:V
import org.hibernate.Session; &:@)roCR
import org.hibernate.criterion.DetachedCriteria; &)Z!A*w]
import org.hibernate.criterion.Projections; ~9Jlb-*I5
import }<7S%?TY
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org.springframework.orm.hibernate3.HibernateCallback; V'Z Z4og
import 9]]isE8r
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org.springframework.orm.hibernate3.support.HibernateDaoS vCe]iB
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upport; HQ0fY
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import com.javaeye.common.util.PaginationSupport; y}
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public abstract class AbstractManager extends GB&^<@
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HibernateDaoSupport { sngM4ikhs
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privateboolean cacheQueries = false; ]8~{C>ch$
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privateString queryCacheRegion; ed\umQ]
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publicvoid setCacheQueries(boolean </B<=tc
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cacheQueries){ kWW$*d$
this.cacheQueries = cacheQueries; umJ!j&(
} BSd\Sg4
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publicvoid setQueryCacheRegion(String &4}Uaxt)
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queryCacheRegion){ x<gP5c>zm
this.queryCacheRegion = H7Y :l0b
d:&=|kKw
queryCacheRegion; appWq}db
} p?idl`?^3
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publicvoid save(finalObject entity){ L,7+26XV"B
getHibernateTemplate().save(entity); n=1_- )
} "x~su?KiA
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publicvoid persist(finalObject entity){ Bh0hUE
getHibernateTemplate().save(entity); .tQeOZW'
} t,,W{M|E(
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publicvoid update(finalObject entity){ jBLLx{
getHibernateTemplate().update(entity); hztxsvw
} /_{B_2i/>
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publicvoid delete(finalObject entity){ (JI[y"2
getHibernateTemplate().delete(entity); +rN&@}Jt.
} Z#znA4;)
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publicObject load(finalClass entity, #sHt3z)6I
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finalSerializable id){ &|Cd1z#?
return getHibernateTemplate().load I:=rwnd
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(entity, id); 9ymx;
} W:S?_JM
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publicObject get(finalClass entity, ;&OVV+y
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finalSerializable id){ 9?38/2kX4
return getHibernateTemplate().get z;Yo76P
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(entity, id); <Gw>}/-^
} oa<%R8T?@
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publicList findAll(finalClass entity){ yBkcYHT
return getHibernateTemplate().find("from >hv8zHOO:
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" + entity.getName()); 6.6;oa4j
} Q$58K9
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publicList findByNamedQuery(finalString Nf!WqD* je
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namedQuery){ f~P~%
return getHibernateTemplate ##5e:<c&[
S(#v<C,hd
().findByNamedQuery(namedQuery); GAU7w"sE
} 1<D^+FC4b,
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publicList findByNamedQuery(finalString query, 6(8zt"E
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finalObject parameter){ D $&6 8
return getHibernateTemplate GV8`.3DBOF
#&,~5
().findByNamedQuery(query, parameter); XDyFe'1I
} IylfMwLC
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publicList findByNamedQuery(finalString query, V\*J"ZP&
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finalObject[] parameters){ -7u_ \XFk
return getHibernateTemplate &Pe[kCO]
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().findByNamedQuery(query, parameters); 0w!:YB ,}
} n'9&q]GN|
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publicList find(finalString query){ kJ"}JRA<
return getHibernateTemplate().find cpu|tK.t
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(query); Z+agS8e(
} qk=OodEMK
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publicList find(finalString query, finalObject WQBpU?O
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parameter){ gr \vC
return getHibernateTemplate().find 4XNkto
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(query, parameter); plgiQr #
} kb[+II
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public PaginationSupport findPageByCriteria %o_CD>yD
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(final DetachedCriteria detachedCriteria){ ,:pKNWY)Q
return findPageByCriteria xM13OoU
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); rq|>z .
} x }i'2
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public PaginationSupport findPageByCriteria nmoC(| r
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(final DetachedCriteria detachedCriteria, finalint G\#dMCk?
>=YQxm}GJ
startIndex){ X!K:V~WG
return findPageByCriteria iCdq-r/r!6
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(detachedCriteria, PaginationSupport.PAGESIZE, Y|L]#
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startIndex); LEA^o"NW.
} <zp|i#~
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public PaginationSupport findPageByCriteria SOeRQb'
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(final DetachedCriteria detachedCriteria, finalint 28O 3N;a
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pageSize, a]=j
finalint startIndex){ DHh30b$c
return(PaginationSupport) .1h1J
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getHibernateTemplate().execute(new HibernateCallback(){ +A<7:`sO
publicObject doInHibernate vf?m-wh
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(Session session)throws HibernateException { ;w^{PZBg
Criteria criteria = wu19Pg?F
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detachedCriteria.getExecutableCriteria(session); e`;U9Z
int totalCount = ]-g4Ct_V
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((Integer) criteria.setProjection(Projections.rowCount 89[OaT_hs
ci`N,&:R
()).uniqueResult()).intValue(); fe7DS)U
criteria.setProjection v Yw$m#@
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(null); @mu=7_$U
List items = ?#VkzT
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criteria.setFirstResult(startIndex).setMaxResults dwmZ_m.
kcZz WG|n
(pageSize).list(); we2D!Ywr
PaginationSupport ps = nHIW_+<Mf
qm|T<zsDY#
new PaginationSupport(items, totalCount, pageSize, R2dCp|6A
wj|[a,(r
startIndex); q|kkdK|N/Y
return ps; H1a<&7
}
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}, true); _2nNCu (
} Nx<%'-9)|
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public List findAllByCriteria(final /PgcW
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DetachedCriteria detachedCriteria){ "yc@_+"\+
return(List) getHibernateTemplate [:bYd}J
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().execute(new HibernateCallback(){ Oo8"s+G
publicObject doInHibernate 1|3{.Ed
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(Session session)throws HibernateException { -%>.Z1uj
Criteria criteria = Fq#;
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detachedCriteria.getExecutableCriteria(session); }?=4pGsI
return criteria.list(); W5zlU2
} 0j(/ N
}, true); Ah1fcXED
} rd!4u14
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public int getCountByCriteria(final Yp8GW1@
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DetachedCriteria detachedCriteria){ 2^T`> ?{X
Integer count = (Integer) tU, >EbwO
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getHibernateTemplate().execute(new HibernateCallback(){ 7~7_T#dTh
publicObject doInHibernate D+69U[P_A
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(Session session)throws HibernateException { XonI
Criteria criteria = ;-@v1I;
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detachedCriteria.getExecutableCriteria(session); (| X?
return <ZgbmRY8
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criteria.setProjection(Projections.rowCount 0ntf%#2{
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()).uniqueResult(); H3qM8_GUA
} >r~!'Pd!
}, true); )H`1CcT
return count.intValue(); k\`~v$R3
} P*zOt]T
} '}.Z' %;
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用户在web层构造查询条件detachedCriteria,和可选的 +YK/^;Th
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 d-sK{ZC"y
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PaginationSupport的实例ps。 )Me$BK>
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ps.getItems()得到已分页好的结果集 /R%
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ps.getIndexes()得到分页索引的数组 tj=l!
ps.getTotalCount()得到总结果数 i$:QOMA
ps.getStartIndex()当前分页索引 \OX;ZVb?5
ps.getNextIndex()下一页索引 7lYiu fg
ps.getPreviousIndex()上一页索引 jizp\%W+
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连续看了两篇robbin有关DetachedCriteria的介绍,感觉真的不错 WfF~\DlrD
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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 N(@B3%H2/J
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一下代码重构了。 WY 'QhieH
6o4Bf| E]
我把原本我的做法也提供出来供大家讨论吧: wz{]CQ 7"
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首先,为了实现分页查询,我封装了一个Page类: Gl@}b\TB
java代码: suP/I?4'@
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/*Created on 2005-4-14*/ qZz?i
package org.flyware.util.page; ]
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/** a(BEm_l3
* @author Joa {i09e1
* ?f\ ~:Gm/
*/ Nxd<#p
publicclass Page { ?@uyqi~:U
?\7$63gBH
/** imply if the page has previous page */ WY)*3?
privateboolean hasPrePage; Pv3rDQ/Yt|
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/** imply if the page has next page */
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privateboolean hasNextPage; ;Or]x?-
S(\<@S&
/** the number of every page */ > q!:*
privateint everyPage; j{?ogFfi
td"D&1eQ@
/** the total page number */ z:7
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privateint totalPage; -cL{9r&X
<<5x"W(,
/** the number of current page */ (+w>hCI
privateint currentPage; c ?H@HoF
Z|
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/** the begin index of the records by the current zD z"Dn9
={]tklND
query */ ~p* \|YC
privateint beginIndex; yy( .|
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/** The default constructor */ {)L*\r
public Page(){ % r>v^1Vo
alV{| Vf[6
} EK=PY
cq#=Vb
/** construct the page by everyPage &hco3HfW
* @param everyPage OKO+(>AQ
* */ 6Ex16
public Page(int everyPage){ #P)(/>nF
this.everyPage = everyPage; E-?@9!2
&
} 8[\~}Q6
&RL
j^A!
/** The whole constructor */ IL&;2%
public Page(boolean hasPrePage, boolean hasNextPage, P'<D0
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p.@_3^#|
int everyPage, int totalPage, P3op1/Np
int currentPage, int beginIndex){ id:6O+\
this.hasPrePage = hasPrePage; @5:#J!
this.hasNextPage = hasNextPage; 8^2E77s4U
this.everyPage = everyPage; L+N;mI8
this.totalPage = totalPage; g* DBW,
this.currentPage = currentPage; ;cD&qheDV
this.beginIndex = beginIndex; S #6:!
} dm`:']?
#-{^={p"
/** >Nr~7s
* @return l`(pV ;{W
* Returns the beginIndex. <<~swN
*/ `Dp_c&9]
publicint getBeginIndex(){ 7:Be.(a
return beginIndex; $dkkgsw7
} +
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/** }F=lG -x
* @param beginIndex Zv^n
* The beginIndex to set. *DS>#x@3*i
*/ V:*6R/Ft
publicvoid setBeginIndex(int beginIndex){ .0b4"0~T6
this.beginIndex = beginIndex; V \Sl->:
} \l71Q/y6u`
_sX@BE
/** K1_#Jhz
* @return ^\3r}kJ0Lp
* Returns the currentPage. +5xk6RP
*/ n1r'Y;G
publicint getCurrentPage(){ JS#AoPWA
return currentPage; ?v@pB>NZ
} {}DoRpq=
y@2$sK3K
/** Qoom[@$
* @param currentPage bv9nDNPD4
* The currentPage to set. ds
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*/ 8/BWe
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publicvoid setCurrentPage(int currentPage){ ukwO%JAr
this.currentPage = currentPage; PCs`aVZ
} MR}h}JEx0
V8}jFib
/** :>3/*"vx?G
* @return t~kh?u].j
* Returns the everyPage. ~tB#Q6`nB
*/ Un^3%=;
publicint getEveryPage(){ @;`d\lQ
return everyPage; 6O|
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} Dt glPo_(
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/** tr@)zM
GB
* @param everyPage qj:\)#I
* The everyPage to set. @G?R(
*/ YF68Ax]
publicvoid setEveryPage(int everyPage){ Cd'`rs}3
this.everyPage = everyPage; J|.n bSE
} cg).b?g
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/** {N'<_%cu
* @return kX "*kD
* Returns the hasNextPage. (Q F-=o
*/ N-YCOSUu
publicboolean getHasNextPage(){ JN> h:
return hasNextPage;
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} |<!xD
iB
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/** nNpXkI:
* @param hasNextPage G6q*U,
* The hasNextPage to set. <RJ+f-
*/ BXa.XZ<n(
publicvoid setHasNextPage(boolean hasNextPage){ l9vJ]
this.hasNextPage = hasNextPage; 4`'V%)M
} s4vj
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/** bu,xIT ^
* @return pz ~REsx
* Returns the hasPrePage. Hh`HMa'q
*/ `9mc+
publicboolean getHasPrePage(){ "9O8#i<Nr
return hasPrePage; u]MQ(@HHF
} K8 Hj)$E61
8Az|SJ<
/** 1a_;(T
* @param hasPrePage $ 9
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* The hasPrePage to set. @j'GcN vs
*/ D8\9nHUD`
publicvoid setHasPrePage(boolean hasPrePage){ 0 LQ%tn
this.hasPrePage = hasPrePage; NKMVp/66D
} CG]/.
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/** lQ!(lPh
* @return Returns the totalPage. (CrP6]=
* ;"JgNad
*/ n*r Xj{Kt
publicint getTotalPage(){
[
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return totalPage; z C7 b
} !112u#V
<6.?:Jj
/** Dn:1Mtj-
* @param totalPage 3*#$:waGd
* The totalPage to set. 21z@-&Oq
*/ .$a|&P=S
publicvoid setTotalPage(int totalPage){ 7[:?VXQ
this.totalPage = totalPage; lY[\eQ
1:
} yi*EE%
: $N43_Wb
} L b-xc]
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*0x!C8*`Xe
ta0 ;:o?/d
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上面的这个Page类对象只是一个完整的Page描述,接下来我写了一 ;E0x#JUrw
&Xi]0\M)
个PageUtil,负责对Page对象进行构造: J~)JsAXAI
java代码: BFZ\\rN`
py$i{v%
5I[6 "o0
/*Created on 2005-4-14*/ <.:mp1,8V
package org.flyware.util.page; y(X^wC
}c=YiH,o
import org.apache.commons.logging.Log; 6W9lKD_i
import org.apache.commons.logging.LogFactory; 2/ejU,S
>=/DCQ$
/** +>Pq]{Uf1j
* @author Joa X0 ]Se(
* \_ MWZRMc5
*/ pV*d"~T
publicclass PageUtil { T;v^BVn
r{wf;5d(
privatestaticfinal Log logger = LogFactory.getLog 9Us'Q{CD
K~+x@O*
(PageUtil.class); s8SCEpz
et<@3wyd]
/** WnhH]WY
* Use the origin page to create a new page Ct]? /
* @param page k#G+<7c<
* @param totalRecords GQ}R xu]
* @return d>wG6Z, |
*/ 'y7<!uo?
publicstatic Page createPage(Page page, int dTqL[?wH?
x$KQ*P~q
totalRecords){ z8
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return createPage(page.getEveryPage(), 3iw.yR
E//*bmww
page.getCurrentPage(), totalRecords); orhzeOi\
} 0OBwe6*
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/** .jl^"{@6
* the basic page utils not including exception A+VzpJ~
R^rA.7T
handler 9`!#5i)VU8
* @param everyPage w[J.?v&^
* @param currentPage -l{ wB"
* @param totalRecords ZWx4/G
* @return page Fl++rUT
*/ be'&tsZ9
publicstatic Page createPage(int everyPage, int Rk}=SB-
BG+X8t8\
currentPage, int totalRecords){ iBCIJ!;
everyPage = getEveryPage(everyPage); L>!MEMqm
currentPage = getCurrentPage(currentPage); Nrc-@ ]
int beginIndex = getBeginIndex(everyPage, d{DBG}/Yg
t}gK)"g
currentPage); m^4O jik
int totalPage = getTotalPage(everyPage, RMa#z [{0
W |+&K0M
totalRecords); `7'=~BP?X
boolean hasNextPage = hasNextPage(currentPage, aWb5w
>2tosxH M
totalPage); !&o>zU.
boolean hasPrePage = hasPrePage(currentPage); v [>8<z8
/P*ph0S-
returnnew Page(hasPrePage, hasNextPage, r`C t/]c
everyPage, totalPage, #}xPOz7:
currentPage, k_1oj[O
eb<'>a
beginIndex); q,(hs]\@
} qGie~S ##
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privatestaticint getEveryPage(int everyPage){ _2WIi/6K
return everyPage == 0 ? 10 : everyPage; 62#8c~dL
} #K/#-S
NjSjE_S2B8
privatestaticint getCurrentPage(int currentPage){ O9F#gO|!
return currentPage == 0 ? 1 : currentPage; q|e<b
} r-o6I:y
Fi"TY^-E;
privatestaticint getBeginIndex(int everyPage, int dH0wVI<z
{4b8s%:!4
currentPage){
&r
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return(currentPage - 1) * everyPage; e6^iakSd.L
} ; J8 25CE
XwdehyPhT2
privatestaticint getTotalPage(int everyPage, int [E/8E
h<
V$ac}A,!
totalRecords){ F6)/Iiv
int totalPage = 0; Y--Uo|H
BmFs6{>~c
if(totalRecords % everyPage == 0) >HQ<KFA
totalPage = totalRecords / everyPage; PWs=0.Wj
else uJ/&!q<3
totalPage = totalRecords / everyPage + 1 ; JU0|pstf
44cy_
return totalPage; !:Clzlg
} pJ]i)$M
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privatestaticboolean hasPrePage(int currentPage){ /<oBgFMoJ
return currentPage == 1 ? false : true; KR/SMwy
} !Ql&Ls
fHwr6"DJ
privatestaticboolean hasNextPage(int currentPage, GFtE0IQ
ziui
int totalPage){ q3R?8Mb
return currentPage == totalPage || totalPage == bn<}
n+uDg
0 ? false : true; *Ldno`1O
} 3L(vZ2&
?]u=5gqUU
rui]_Fn]I
} `@|Kx\y4=j
En/EQ\T@F
tXnD>H YV
9q!./)
@^kt[$X;
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。 9 ~$'?
5 MD=o7O^
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 lGtTZcg
%t\~3pw=
做法如下: )YP9
1. 编写一个通用的结果存储类Result,这个类包含一个Page对象 >
H(o=39s
zwJVi9sO
的信息,和一个结果集List: 42mZ.,<
java代码: B7!dp`rPp
T.p:`}Ma
n:wZL&ZV0
/*Created on 2005-6-13*/ csay\Q{
package com.adt.bo; 3fWL}]{<a
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import java.util.List; L cpz(W^
s5'So@L8
import org.flyware.util.page.Page; VDP \E<3"
J#^oUq
/** @"=wn:O+
* @author Joa IDpW5Dc
*/ |}>;wZ[7
publicclass Result { +sc--e?
eDPmUlC+-
private Page page; Tp?l;DU
ayQB@2%
private List content; 0'9zXJ"
1]<wZV}.
/** 9(;I+.;8k
* The default constructor )W& $FU4JK
*/ n@Ar%%\
public Result(){ b:w {7
super(); V]$Tbxg
} g/ict2!
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/** +/E
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* The constructor using fields oG_-a(N
* ]wQ#8}zO
* @param page h^}r$k_n
* @param content A#6\5u
*/ \tWFz(
public Result(Page page, List content){ oHbG-p
this.page = page; ?{
0MF
this.content = content; Uxyj\p
} *l[;g
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/** e5 ?;{H
* @return Returns the content. fv",4L
*/ [*k25N
publicList getContent(){ O*ql!9}E{
return content; ]EhW
} ;x=kJ@
{|kEGq~aE
/** ;m+*R/
* @return Returns the page. jxU z-U-
*/ H^c8r^#
public Page getPage(){ zNs8yMnFr
return page; $bd&$@sA
} wewYlm5@
; SS/bS|
/** $dp;$X3
* @param content X7*i-v@
* The content to set. x dT1jI
*/ U;7Cmti"
public void setContent(List content){ "0(H! }D
this.content = content; 5)rMoYn25
} Y|NANjEAfm
P)2.Gx/
/** !`rR;5&sT
* @param page \!erP!$x.
* The page to set. :q.g#:1s
*/ )NoNgU\7!
publicvoid setPage(Page page){ LB1AjNJ
this.page = page; Vg6/ 1I
} JFyw,p&xB
} b=5"*=T{+
F.s*^}L[
vbo:,]T<A
{!lC$ SlJ
(^:0g.~c
2. 编写业务逻辑接口,并实现它(UserManager, ]Cfjs33H
[f^:V:){
UserManagerImpl) yl>V'
java代码: R d?8LLz
5d7AE^SHsH
U.fLuKt
/*Created on 2005-7-15*/ X7cqAi
package com.adt.service; *kmD/J
fd {75J5%
import net.sf.hibernate.HibernateException; x:7"/H|
&%@b;)]J
import org.flyware.util.page.Page; l@
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r9nyEzk
import com.adt.bo.Result; B<99-7x3
-W/Lg5eK
/**
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* @author Joa 9hJlc
*/ B_gzpS]
publicinterface UserManager { eSqKXmH[m
>TB"Ez09
public Result listUser(Page page)throws Io|3zE*<
P}2i[m.*,
HibernateException; sew0n`d1
+N|}6e
} \]j{
9+"R}Nxv^
{Wi)/B}
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rZij[6]Y^
java代码: X,]E {
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4Y2!q$}I+
/*Created on 2005-7-15*/ Q7!";ol2
package com.adt.service.impl; U#qs^f7R
dR9[K4`p/
import java.util.List; 'l sG?
L@|xpq
import net.sf.hibernate.HibernateException; ujLz<5gKuO
IO@Ti(,
import org.flyware.util.page.Page; G~VukW<e
import org.flyware.util.page.PageUtil; P^)J^{r
%KkMWl&:
import com.adt.bo.Result; B24,;2J
import com.adt.dao.UserDAO; S [$Os7
import com.adt.exception.ObjectNotFoundException; &OMe'P
import com.adt.service.UserManager; ;8~tt I
;VS\'#{e
/** r(VGdG
* @author Joa apkmb<
*/ 38gHM9T
xh
publicclass UserManagerImpl implements UserManager { $`wo8A|)
ndXUR4
private UserDAO userDAO; DNyU]+\L[l
ta*6xpz-\Q
/** xoYaL
* @param userDAO The userDAO to set. <hv {,1p-r
*/ ru 5T0w";V
publicvoid setUserDAO(UserDAO userDAO){ (2l?~CaK
this.userDAO = userDAO; YQ`m;<
} dfa^5`_
`J26Y"]P
/* (non-Javadoc) ol7^T
* @see com.adt.service.UserManager#listUser 'KU)]v
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(org.flyware.util.page.Page) {SOy-
*/ rHMr8,J;
public Result listUser(Page page)throws UWPzRk#s"
,WKWin
HibernateException, ObjectNotFoundException { s6YnNJ,SK
int totalRecords = userDAO.getUserCount(); b-"kclK
if(totalRecords == 0) ^rX5C2}G\D
throw new ObjectNotFoundException <0M2qt8
VmbfwHRWb
("userNotExist"); l.Yq4qW
page = PageUtil.createPage(page, totalRecords); d,:3;:CR
List users = userDAO.getUserByPage(page); t91z<Y|
returnnew Result(page, users); H2iC? cSR
} #FwTV@
9u^ yEqG`
} S4!}7NOh
!hc#il'g].
/f Ui2[y
'0tNo.8K
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其中,UserManagerImpl中调用userDAO的方法实现对User的分页查 a*3h|b<
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询,接下来编写UserDAO的代码: f$I$A(0P
3. UserDAO 和 UserDAOImpl: F./$nwb
java代码: hha!uD~(
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9'I$8Su
/*Created on 2005-7-15*/ zYZ^/7)
package com.adt.dao; #P/}'rdt
Q!`
import java.util.List; h#?)H7ft
yE=tuHv(0
import org.flyware.util.page.Page; d xk~
/~6)Vt
import net.sf.hibernate.HibernateException; zLS=>iLD{
t}m"rMbt
/** U!D\Vd
* @author Joa QKt+Orz
*/ "IMq +
publicinterface UserDAO extends BaseDAO { 1yT\|2ARZ%
J,,+JoD
publicList getUserByName(String name)throws a$2WL g,
nZP%Z=p7
HibernateException; US2Tdmy@05
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publicint getUserCount()throws HibernateException; NU |vtD
whb,2=gIE
publicList getUserByPage(Page page)throws "Wz74ble
S<=|i
HibernateException; {cMf_qQ
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} FTT=h0t
C#@>osC
h$#zuqm
`bMwt?[*
,`.`}'
java代码: .p?kAf`
.In8!hjYy4
@$]
CC1Y
/*Created on 2005-7-15*/ 5l,Q=V^@l
package com.adt.dao.impl; [&H?--I
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import java.util.List; IP-}J$$1
01AzM)U3"m
import org.flyware.util.page.Page; @ 9q/jv`
:^*9Eb
import net.sf.hibernate.HibernateException; ," ~4l&
import net.sf.hibernate.Query; <'l;j"&lp
W
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import com.adt.dao.UserDAO; oNa*|CSE>
p&<X&D
/** BBUXoz
* @author Joa Sh2;^6d
*/ Ey* *j
public class UserDAOImpl extends BaseDAOHibernateImpl =sa bJsgL
F2k)hG*|{
implements UserDAO { tW7*(D
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/* (non-Javadoc) *3r{s'm
* @see com.adt.dao.UserDAO#getUserByName q" %;),@
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AWS9
(java.lang.String) +5C*i@v
*/ 4RU/y+[o
publicList getUserByName(String name)throws {S;/+X,
Ls~F4ar$/
HibernateException { 1XvB,DhJ
String querySentence = "FROM user in class S/l?wwD
*q/oS8vavd
com.adt.po.User WHERE user.name=:name"; |=CV.Su
Query query = getSession().createQuery U3zwC5}BN
;q6FdS
(querySentence); \hcb~>=C
query.setParameter("name", name); %`Q<_LTU
return query.list(); Ikbz3]F^V
} ,0=@cJ
V9o_Q
/* (non-Javadoc) }\oy?_8~
* @see com.adt.dao.UserDAO#getUserCount() _'lrI23I
*/ pdQ6/vh
publicint getUserCount()throws HibernateException { z9#iU>@
int count = 0; xo46L\
String querySentence = "SELECT count(*) FROM ua-cX3E
8}0O @ wq
user in class com.adt.po.User"; i C
nWb
Query query = getSession().createQuery 8>sToNRNe
^KsiTVY
(querySentence); Kpo{:a
count = ((Integer)query.iterate().next f9Hm2wV
6k=ink-/
()).intValue(); Yy"05V.
return count; nD$CY K
} z$d/Vz,a
.d;XLS~
/* (non-Javadoc) i-b++R/WN
* @see com.adt.dao.UserDAO#getUserByPage n>Rt9
'14
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(org.flyware.util.page.Page) v_gQCS
*/ P"<