Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 m7d? SU
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 Bq\%]2;eo{
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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 -ERDW Y
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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 05w_/l+
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分页支持类: r% qgLP{v
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java代码: o8Tt|Lxb$8
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package com.javaeye.common.util; 0dXWy`Mn
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import java.util.List; ':J[KWuV
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publicclass PaginationSupport { sN;xHTY
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publicfinalstaticint PAGESIZE = 30; zsWYV n]
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privateint pageSize = PAGESIZE; lNqYpyvy*
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privateList items; MsfY|(/m
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privateint totalCount; j^>J*gLM}W
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privateint[] indexes = newint[0]; fyh9U_M);w
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privateint startIndex = 0; }c^`!9
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public PaginationSupport(List items, int 3u_[=a
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totalCount){ P @G2F:}
setPageSize(PAGESIZE); 7$Jb"s
setTotalCount(totalCount); up#W"`"
setItems(items); x} {/) ?vC
setStartIndex(0); EH=[!iW ;
} :!n_a*.{
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public PaginationSupport(List items, int UBLr|e>dQE
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totalCount, int startIndex){ Rq|7$O5
setPageSize(PAGESIZE); 6* (6>F5
setTotalCount(totalCount); jZx.MBVy]
setItems(items); $qV, z
setStartIndex(startIndex); &
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} j
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public PaginationSupport(List items, int \!x~FVA
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totalCount, int pageSize, int startIndex){ *j6KQZ"
setPageSize(pageSize); 3"FvYv{
setTotalCount(totalCount); 9J+p.N
setItems(items); '1+s^Q'pc
setStartIndex(startIndex);
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} F>RL&i
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publicList getItems(){ LDc?/
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return items; ]{^'{ z$i
} GJS3O;2*
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publicvoid setItems(List items){ D`d*bNR
this.items = items; 41Ga- 0p
} 79`OB##
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publicint getPageSize(){ kD;1+lNz
return pageSize; sE:~+C6o:
} VW&EdrR,S
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publicvoid setPageSize(int pageSize){ J'}G~rB<<
this.pageSize = pageSize; Ec'Hlsgh&T
} *^aEUp6&
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publicint getTotalCount(){ hQ7-m.UZw
return totalCount; 7XzhKA6
} #z6[8B
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publicvoid setTotalCount(int totalCount){ r+:]lO
if(totalCount > 0){ 1aAY7Dm_&
this.totalCount = totalCount; I-Q@v`
int count = totalCount / amTeTo]Tg
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pageSize; b!p]\B!
if(totalCount % pageSize > 0) JkShtLEr
count++; +P! ibHfP
indexes = newint[count]; h*>%ou
for(int i = 0; i < count; i++){ =Gv*yR*]t
indexes = pageSize * Xfc+0$U@
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} t]IHQ8
}else{ Bo,>blspw
this.totalCount = 0; /9pN.E
} HVd y!J
} o;TS69|D
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publicint[] getIndexes(){ a`e'HQ
return indexes; x{O) n
} d88Dyzz
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publicvoid setIndexes(int[] indexes){ >^6|^rc
this.indexes = indexes; ;9CbioO
} Ct][B{
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publicint getStartIndex(){ u\{MQB{T
return startIndex; C 547})
} W:maE9E=
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publicvoid setStartIndex(int startIndex){ 8NkyT_\
if(totalCount <= 0) J!Q #xs
this.startIndex = 0; gvFJ~lL
elseif(startIndex >= totalCount) })+iAxR
this.startIndex = indexes p*j>s\
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[indexes.length - 1]; O _C<h
elseif(startIndex < 0) h`dHk]O
this.startIndex = 0; +Wl]1
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else{ CNe(]HIOH
this.startIndex = indexes -{}(U
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[startIndex / pageSize]; fH@cC`
} 4.Q[Tu
} ,.kmUd
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publicint getNextIndex(){ OMW]9E
int nextIndex = getStartIndex() + GEvx<:
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pageSize; cTW$;Fpc+
if(nextIndex >= totalCount) 7'OR;b$
return getStartIndex(); :t9sAD
else >k
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return nextIndex; ce;$)Ff\
} @~Ys*]4UE
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publicint getPreviousIndex(){ LGw-cX #
int previousIndex = getStartIndex() - dU*$V7
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pageSize; q44vI
if(previousIndex < 0) ]c v/dY#
return0;
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else e_-7,5Co
return previousIndex; yN)(MmX'1
} kL8E#
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} xbxzB<yL
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抽象业务类 Qn|8Ic` *
java代码: IhBQ1,&J
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/** $IS!GS&:
* Created on 2005-7-12 am!ssF5s
*/ vz#-uw,O:
package com.javaeye.common.business; BQ<\[H;
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import java.io.Serializable; @ ;@~=w
import java.util.List;
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import org.hibernate.Criteria; j^;P=L0=
import org.hibernate.HibernateException; =L@CZ"
import org.hibernate.Session; e v0>j4Q
import org.hibernate.criterion.DetachedCriteria; `k*;%}X\
import org.hibernate.criterion.Projections; /P-#y@I
import Sk"hqF.2
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org.springframework.orm.hibernate3.HibernateCallback; r~JGs?GH
import D 5oYcGc
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org.springframework.orm.hibernate3.support.HibernateDaoS eub}+~_?[
{ `Z~T&}~T
upport; 6$:Q]zR#'H
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import com.javaeye.common.util.PaginationSupport; v&(=^A\eN
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public abstract class AbstractManager extends _yJz:pa
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HibernateDaoSupport { (3$DUvx7
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privateboolean cacheQueries = false; ]" e'z
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privateString queryCacheRegion; PYWFz
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publicvoid setCacheQueries(boolean 1ig*Xp[
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cacheQueries){ gE$Uv*Gj
this.cacheQueries = cacheQueries; ;]0d{
} P_0[spmFU
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publicvoid setQueryCacheRegion(String 9G2rVk
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queryCacheRegion){ /n(0w`
this.queryCacheRegion = 2A@oa9
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queryCacheRegion; ~E((n
} &L5
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publicvoid save(finalObject entity){ _b/zBFa%
getHibernateTemplate().save(entity); yQ[ ;.<%v
} OI6Mx$
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publicvoid persist(finalObject entity){ HfhI9f_ x
getHibernateTemplate().save(entity); Li|~%E1
} )92(C
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publicvoid update(finalObject entity){ h%$^s0w
getHibernateTemplate().update(entity); QwpX3
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} 1eV&oN#
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publicvoid delete(finalObject entity){ lb}RPvQE
getHibernateTemplate().delete(entity); svDnw cl
} 2]9
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publicObject load(finalClass entity, n{MTh_C4n
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finalSerializable id){ /3rNX}tOMH
return getHibernateTemplate().load N9#xT X
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(entity, id); c%hXj#;
} !*~QB4\2b
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publicObject get(finalClass entity, GVlT+Rs7
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finalSerializable id){ ,D }Ka?
return getHibernateTemplate().get Cj4Y, N
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(entity, id); s#aj5_G
} X[tB ^`
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publicList findAll(finalClass entity){ v'?o#_La+
return getHibernateTemplate().find("from |O>e=HC#q8
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" + entity.getName()); _<mY|
} O.QR1
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publicList findByNamedQuery(finalString [o(!/38"@=
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namedQuery){ O/Hj-u6&A
return getHibernateTemplate t CO?<QBE
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().findByNamedQuery(namedQuery); Z8ivw\|M8
} h
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publicList findByNamedQuery(finalString query, <XDnAv0t
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finalObject parameter){ 11#b%dT
return getHibernateTemplate ;8&/JS N M
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().findByNamedQuery(query, parameter); )SZ#%OE*
} BxV>s+o&]
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publicList findByNamedQuery(finalString query, 6XZjZ*)W
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finalObject[] parameters){ 0L32sFy
return getHibernateTemplate nu1XT 1q1
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().findByNamedQuery(query, parameters); `<v$+mG
} )i:*r8*~
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publicList find(finalString query){ dwUDhQt3Q
return getHibernateTemplate().find U<sGj~"#
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(query); rX5"p!z
} oidK_mU9q
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publicList find(finalString query, finalObject t@MUNW`Q
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parameter){ z>,tP
return getHibernateTemplate().find W,yLGz \
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(query, parameter); mP6}$D
} Pke8RLg2A
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public PaginationSupport findPageByCriteria k%Tp9x$
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(final DetachedCriteria detachedCriteria){ 4 Cd5-I
return findPageByCriteria ~Yl.(R
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); )jUPMIo
} }TZM@{;
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public PaginationSupport findPageByCriteria o(?9vU
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(final DetachedCriteria detachedCriteria, finalint ZQ`4'|"
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startIndex){ u0k'Jh]K
return findPageByCriteria [9 :9<#?o^
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(detachedCriteria, PaginationSupport.PAGESIZE, ?-3G5yy
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startIndex); adri02C/
} .9z}S=ZK
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public PaginationSupport findPageByCriteria dD39?K/
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(final DetachedCriteria detachedCriteria, finalint $39TP@?:Z)
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pageSize, 0(u}z
finalint startIndex){ <Pe'&u
return(PaginationSupport) iI'ib-d
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getHibernateTemplate().execute(new HibernateCallback(){ j p~Tlomp
publicObject doInHibernate jg%mWiKwK7
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(Session session)throws HibernateException { (yuOY/~k/
Criteria criteria = @J6r;4|&
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detachedCriteria.getExecutableCriteria(session); T:K}mLSg
int totalCount = Si23w'T
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((Integer) criteria.setProjection(Projections.rowCount dikX_ Q>D
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()).uniqueResult()).intValue(); (NfB+Ue}
criteria.setProjection ,d.5K*?aI
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(null); KC9VQeSc
List items = 6q0)/|,@
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criteria.setFirstResult(startIndex).setMaxResults n) HV:8j~
@_c&lToj_
(pageSize).list(); As^eL/m2L
PaginationSupport ps = wNFx1u^/)
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new PaginationSupport(items, totalCount, pageSize, \>.[QQVI"l
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startIndex); E/1:4?1 S
return ps; *N{k#d/
} SjA'<ZX>TM
}, true); YReI|{O$c
} \>j@!W
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public List findAllByCriteria(final CSWA/#&8>
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DetachedCriteria detachedCriteria){ ^
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return(List) getHibernateTemplate :y{@=E=XSC
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().execute(new HibernateCallback(){ ao(Lv+
publicObject doInHibernate C4dCaiX
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(Session session)throws HibernateException { 9&B#@cw
Criteria criteria = ].QzOV'
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detachedCriteria.getExecutableCriteria(session); fp 3`O9+em
return criteria.list(); {Rxb_9
} G-vkkNj%e
}, true); 7}&vEc@w&
} "1DlusmCCB
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public int getCountByCriteria(final )7E7K%:b,
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DetachedCriteria detachedCriteria){ ?4W6TSW-'
Integer count = (Integer) a`C2:Z23(#
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getHibernateTemplate().execute(new HibernateCallback(){ 2j{T8F\]
publicObject doInHibernate (ze9-!%
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(Session session)throws HibernateException { +J42pSxzoo
Criteria criteria = 6mIRa(6V
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detachedCriteria.getExecutableCriteria(session); uXG$YDKqC
return 7<?Aou
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criteria.setProjection(Projections.rowCount /|v
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()).uniqueResult(); ehMpo BL
} P}!pmg6V
}, true); 3JF" O+@
return count.intValue(); i>pUTT
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} |Ur$H!oe?'
} og*ti!Z
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用户在web层构造查询条件detachedCriteria,和可选的 3X`N~_+
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 5~i}!n
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PaginationSupport的实例ps。 =u5( zaBe
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