Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 <}1GYeP
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 r+}<]?aT>-
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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 fx/If
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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 #\MkbZc d
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分页支持类: D?r% Y
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java代码: \D}$foHg
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package com.javaeye.common.util; WmZ,c_
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import java.util.List; xO;Qr.3PX
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publicclass PaginationSupport { KL8WT6!RZ
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publicfinalstaticint PAGESIZE = 30; bs_rw+
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privateint pageSize = PAGESIZE; .jRv8x b
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privateList items; D0rqte
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privateint totalCount; SNtOHTQ
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privateint[] indexes = newint[0]; <"x *ZT
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privateint startIndex = 0; ;Yn_*M/*
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public PaginationSupport(List items, int jQ5FvuNOy
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totalCount){ 7kQ,D,c'
setPageSize(PAGESIZE); [,q^\T
setTotalCount(totalCount); [jgC`
setItems(items); hVu~[ 'Me
setStartIndex(0); $lf\1)B~*
} cb9@
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public PaginationSupport(List items, int ]8EkZC
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totalCount, int startIndex){ X*rB`M7,
setPageSize(PAGESIZE); mbZg2TTy
setTotalCount(totalCount); q@iZo,Yk
setItems(items); =lS@nRH
setStartIndex(startIndex); o)Nm5g
} 5C"A*Fg?;
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public PaginationSupport(List items, int tq5o
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totalCount, int pageSize, int startIndex){ ,\E5et4
setPageSize(pageSize); ceNJXK
setTotalCount(totalCount); `/eh
setItems(items); K<7 Db4H
setStartIndex(startIndex); rYk
} uCGn9]
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publicList getItems(){ k{pn~)xg
return items; nokMS
} LX iis)1
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publicvoid setItems(List items){ KPs
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this.items = items; @!s(Zkpev
} BZ@v8y _TA
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publicint getPageSize(){ Fj0h-7L
return pageSize; }}~ t!/x
} _CXXgF[OCA
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publicvoid setPageSize(int pageSize){ =s[P =d U
this.pageSize = pageSize; {$^Lb4O[V
} /R)(u@jk
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publicint getTotalCount(){ "AMsBvzgo
return totalCount; s h^&3}
} 5 }F6s
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publicvoid setTotalCount(int totalCount){ R3} Z"
if(totalCount > 0){ aW#_"Y}v'
this.totalCount = totalCount; m4kUA"n5
int count = totalCount / ^tKJ}}
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pageSize; 1F }mlyS
if(totalCount % pageSize > 0) E9n7P'8
count++; [:C!g#o
indexes = newint[count]; Xu&4|$wB+
for(int i = 0; i < count; i++){ MA5BTq<&
indexes = pageSize * ?3Dsz
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} >l|dLyiae
}else{ YfOO]{x,X
this.totalCount = 0; O{`r.H1',
} CF+:9PG
} @X*r5hjc
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publicint[] getIndexes(){ bLi>jE.%.
return indexes; E>6:59+
} e8<[2J)P&
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publicvoid setIndexes(int[] indexes){ <y5f[HjLy
this.indexes = indexes; `jB2'
} B|+tK
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publicint getStartIndex(){ Z]Iyj
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return startIndex; nH]F$'rtA
} )x*pkE**c
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publicvoid setStartIndex(int startIndex){ )0NE_AZ?
if(totalCount <= 0) w/m~#`a
this.startIndex = 0; 4`+hX'
elseif(startIndex >= totalCount) Oy/+uw^
this.startIndex = indexes HQl_/:Wx
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[indexes.length - 1]; fr<, LC.
elseif(startIndex < 0) 9K
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this.startIndex = 0; y*Wl(w3
else{ E-q*u(IW
this.startIndex = indexes z!6:Dt6^
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[startIndex / pageSize]; |J#mgA}(
} 7`f',ZK%
} y-c2tF@'v
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publicint getNextIndex(){ _ s[v:c
int nextIndex = getStartIndex() + zn|/h,.
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pageSize; L'Fy\K\
if(nextIndex >= totalCount) A_WtmG_9
return getStartIndex(); &u/T,jy`
else bqDHLoB\1
return nextIndex; Hc{0O7
} qSWnv`hL
)
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publicint getPreviousIndex(){ X%b.]A
int previousIndex = getStartIndex() - yy6?16@
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pageSize; vc_ 5!K%[
if(previousIndex < 0) 2!35Tj"RFE
return0; *!*J5/b
else cSSrMYX2
return previousIndex; Q0j$u[x6s
} ^L1#
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} L)o7~M
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抽象业务类 kt; |
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java代码: R)w|bpW
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/** 6DG:imGl
* Created on 2005-7-12 'B>%5'SdD
*/ nVC:5ie
package com.javaeye.common.business; 1wa zJj=v
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import java.io.Serializable; I!ykm\<
import java.util.List; bVc;XZwI
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import org.hibernate.Criteria; kMHupROj
import org.hibernate.HibernateException; ^c{,QS{
import org.hibernate.Session; kgvB80$4
import org.hibernate.criterion.DetachedCriteria; I~$LIdzw
import org.hibernate.criterion.Projections; ,/;mK_6
import {g>k-.
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org.springframework.orm.hibernate3.HibernateCallback; YolO-5
import eswsxJ/!
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org.springframework.orm.hibernate3.support.HibernateDaoS u,e(5LU
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upport; S3=M k~_&
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import com.javaeye.common.util.PaginationSupport; ,xew3c'(W
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public abstract class AbstractManager extends XK
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HibernateDaoSupport { D/w4u;E@
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privateboolean cacheQueries = false; 2@
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privateString queryCacheRegion; -T4{PM
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publicvoid setCacheQueries(boolean -BNlZgk-^
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cacheQueries){ y#AwuC K
this.cacheQueries = cacheQueries; Eg"DiI)7
} aPq9^S*
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publicvoid setQueryCacheRegion(String fa#]G^f
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queryCacheRegion){ eiJO;%fl>l
this.queryCacheRegion = -}m#uUqI
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queryCacheRegion; &t+
} .[hQ#3)W
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publicvoid save(finalObject entity){ {6v|d{V+e
getHibernateTemplate().save(entity); /vl]Oa&U
} !<!sB)
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publicvoid persist(finalObject entity){ b'^OW
getHibernateTemplate().save(entity); ${#5$U+kI
} ^j?\_r'j
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publicvoid update(finalObject entity){ W>Y8 u8
getHibernateTemplate().update(entity); .$DB\jJXjV
} 6u3DxFiTm
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publicvoid delete(finalObject entity){ ]],6Fi+
getHibernateTemplate().delete(entity); >eg&i(C+
} sQ/7Mc
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publicObject load(finalClass entity, mf'N4y%
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finalSerializable id){ BciwS_Qx
return getHibernateTemplate().load x\XgQQ]-
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(entity, id); cve(pkl
} $V~r*#$.
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publicObject get(finalClass entity, $EbxV"b+
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finalSerializable id){ pr\yc
return getHibernateTemplate().get +vkqig
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(entity, id); hA?j"y0?
} sJX/YGHt
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publicList findAll(finalClass entity){ -gh',)R
return getHibernateTemplate().find("from l!\C"f1o,
$"T1W=;j9
" + entity.getName()); p2PD';"
} |H5){ 2V>K
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publicList findByNamedQuery(finalString iYA06~d
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namedQuery){ $nQ; ++
return getHibernateTemplate StWDNAf)
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().findByNamedQuery(namedQuery); 3O<<XXar
} {o7ibw=E)
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publicList findByNamedQuery(finalString query, =/J4(#Xb
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finalObject parameter){ /`0*!sN*5
return getHibernateTemplate AqvRzi(Y
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().findByNamedQuery(query, parameter); a=gTGG"9
} z-uJ+SA
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publicList findByNamedQuery(finalString query, 1j6ZSE/*|
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finalObject[] parameters){ Wt"@?#L
return getHibernateTemplate aZ2liR\QE
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().findByNamedQuery(query, parameters); 4pkc9\
} F&;g<
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publicList find(finalString query){ pq*b"Jku1
return getHibernateTemplate().find fu9y3`
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(query); h|dVVCsN
} jgYUS@}
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publicList find(finalString query, finalObject u.0Z)j}N
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parameter){ @.T'
return getHibernateTemplate().find |A7Yv
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(query, parameter); Ka2U@fK"
} `?rPs8+R
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public PaginationSupport findPageByCriteria 1[J&^@t[h6
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(final DetachedCriteria detachedCriteria){ o&g=Z4jj<
return findPageByCriteria 6<NaME
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); s>~!r.GC
} (G}*ho
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public PaginationSupport findPageByCriteria >
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(final DetachedCriteria detachedCriteria, finalint {{f%w$r(
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startIndex){
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return findPageByCriteria ?;+=bKw0
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(detachedCriteria, PaginationSupport.PAGESIZE, f`p`c*
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startIndex); "f~S3 ?^!2
} TuBg 4\V
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public PaginationSupport findPageByCriteria k x6%5%
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(final DetachedCriteria detachedCriteria, finalint w@X<</`
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pageSize, jr*A1y*
finalint startIndex){ '%V ;oJ"
return(PaginationSupport) zkI\ji
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getHibernateTemplate().execute(new HibernateCallback(){ 0^]E-Zf
publicObject doInHibernate
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(Session session)throws HibernateException { /Y:_qsO1
Criteria criteria = B y6:
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detachedCriteria.getExecutableCriteria(session); J@H9nw+Q
int totalCount = D._q'v<
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((Integer) criteria.setProjection(Projections.rowCount ]Tf.KUm
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()).uniqueResult()).intValue(); d vkA-9
criteria.setProjection QT9(s\u
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(null); ]$4 k+)6
List items = \UGs_5OT
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criteria.setFirstResult(startIndex).setMaxResults +~ :1H.
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(pageSize).list(); ToCB*GlL
PaginationSupport ps = wP6~HiC
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new PaginationSupport(items, totalCount, pageSize, bh6Mh<+
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startIndex); Up*p*(d3
return ps; hrNri$
} OlRBvfoh8
}, true); k^p|H:
} MH 'S,^J
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public List findAllByCriteria(final un6grvxr
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DetachedCriteria detachedCriteria){ }7g\1l\
return(List) getHibernateTemplate P@lExF*D1:
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().execute(new HibernateCallback(){ d&(GIH E&d
publicObject doInHibernate X{9D fgW
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(Session session)throws HibernateException { VDx=Tsu-
Criteria criteria = nDkyo>t.
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detachedCriteria.getExecutableCriteria(session); \Z
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return criteria.list(); )j4]Y dJ
} %8yfFrk
}, true); ?Re@`f+*
} +Ys<V
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public int getCountByCriteria(final f/&Dy'OV7
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DetachedCriteria detachedCriteria){ gZM\RJZ_
Integer count = (Integer) <o3e0JCq
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getHibernateTemplate().execute(new HibernateCallback(){ -F/"W
publicObject doInHibernate =~?2i)-mC
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(Session session)throws HibernateException { QSW03/_f
Criteria criteria = gPT-zul
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detachedCriteria.getExecutableCriteria(session); TCX*$ac"
return &0It"17Ej
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criteria.setProjection(Projections.rowCount eq<xO28z
"k)( ,
()).uniqueResult(); mF%>pj&