Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 ~mZ[@Z
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 yr* ~?\
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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 f3s4aARP
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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 aCi)icn$
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分页支持类:
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java代码: Q=Q&\.<
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package com.javaeye.common.util; :*R+ee,&-
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import java.util.List; |x=(}g
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publicclass PaginationSupport { UMMGT6s,E8
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publicfinalstaticint PAGESIZE = 30; n\$.6
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privateint pageSize = PAGESIZE; k4!p))ql
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privateList items; T hVq5
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privateint totalCount; z uo:yaO
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privateint[] indexes = newint[0]; !Q}Bz*Y
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privateint startIndex = 0; P%d3fFzK
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public PaginationSupport(List items, int A'D2uV
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totalCount){ |Qpd<L
setPageSize(PAGESIZE); iszVM
setTotalCount(totalCount); S2 P9C"
setItems(items); LaL{
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setStartIndex(0); bn=7$Ax
} f:AfM f>m
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public PaginationSupport(List items, int tiRi_
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totalCount, int startIndex){ &KV$x3
setPageSize(PAGESIZE); B- |C%~fe
setTotalCount(totalCount); c0_512
setItems(items); g>a%
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setStartIndex(startIndex); _UbyhBl
} DweF8c
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public PaginationSupport(List items, int q AsTiT6r
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totalCount, int pageSize, int startIndex){ SPvKq=,
setPageSize(pageSize); T?1e&H%USV
setTotalCount(totalCount); ?xwZ< A
setItems(items); c'Q.2^w^
setStartIndex(startIndex); $J]NWgXl@
} 1C/Vwf:@
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publicList getItems(){ sqj8I"<`
return items; R[#B|$
} R$">
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publicvoid setItems(List items){ n8q%>.i7
this.items = items; Z5*O\kJv
} /<J5?H
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publicint getPageSize(){ 3g0v,7,Zv
return pageSize; YdYaLTz
} qy-Hv6oof
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publicvoid setPageSize(int pageSize){
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this.pageSize = pageSize; {axRq'=
} n0uL^{B
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publicint getTotalCount(){ !F2JT@6
return totalCount; kPSi6ci
} >/.Ae8I)
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publicvoid setTotalCount(int totalCount){
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if(totalCount > 0){ jz I,B
this.totalCount = totalCount; 1NAtg*`
int count = totalCount / o KY0e&5
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pageSize; l5U ^lc
if(totalCount % pageSize > 0) r90R~'5x9
count++; qIO)<5\[%d
indexes = newint[count]; ;F/s!bupCM
for(int i = 0; i < count; i++){ xoQqku"vn
indexes = pageSize * jtwe9
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} vfh\X1Ui}
}else{ '=UsN_@
this.totalCount = 0; )<T2J0*
} ^>s{o5H&
} hgdr\
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publicint[] getIndexes(){ |e2s{J2
return indexes; fh&Q(:ZU
} C1-Jj_XQ.
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publicvoid setIndexes(int[] indexes){ pQ`S%]k.<
this.indexes = indexes; |+1k7S,
} I.1(qbPkF+
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publicint getStartIndex(){ Eq5X/Hx
return startIndex; 9hhYyqGsO
} py\/m]
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publicvoid setStartIndex(int startIndex){ qITd.<
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if(totalCount <= 0) (>-(~7PR
this.startIndex = 0; W"s)s
elseif(startIndex >= totalCount) J^mm"2
this.startIndex = indexes oho~?.F
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[indexes.length - 1]; UJ&gm_M+kL
elseif(startIndex < 0) ASr3P5/
this.startIndex = 0; x'
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else{ Fz]!2rt
this.startIndex = indexes M:%Ll3
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[startIndex / pageSize]; c`#4}$
} V&d?4i4/Q
} =CL h<&
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publicint getNextIndex(){ 9|>5;Ej
int nextIndex = getStartIndex() + B(pHo&ox
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pageSize; I!~3xZ
if(nextIndex >= totalCount) QaAMiCZFR
return getStartIndex(); XK
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else N||s#
return nextIndex; h6e,w$IL
} u6/;=]0
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publicint getPreviousIndex(){ :LD+B1$y
int previousIndex = getStartIndex() - ^bXCYkx
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pageSize; Jv D`RUh
if(previousIndex < 0) Cx8
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return0; .Mzrj{^Y
else `u7twW*U2
return previousIndex; Ap`D{u/
} 7 '7a`-W
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} !)uXCg9U
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抽象业务类 Y67i\U>?
java代码: )h;zH,DA[3
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/** fq0[7Yb
* Created on 2005-7-12 13I~
*/ lziC.Dpa
package com.javaeye.common.business; `aaT
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import java.io.Serializable; su Z`
import java.util.List; /S%!{;:
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import org.hibernate.Criteria; :']O4v#^
import org.hibernate.HibernateException; E=~Ahkg
import org.hibernate.Session; ZmJHLn[B
import org.hibernate.criterion.DetachedCriteria; SrXuiiK
import org.hibernate.criterion.Projections; q^b_'We_9
import 9!Vp-bo
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org.springframework.orm.hibernate3.HibernateCallback; '8fh(`
import 'a enhj
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org.springframework.orm.hibernate3.support.HibernateDaoS
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upport; r7N%onx
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import com.javaeye.common.util.PaginationSupport; ,NQ>,}a0
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public abstract class AbstractManager extends p2o66t
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HibernateDaoSupport { 3S1`av(tD
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privateboolean cacheQueries = false; lV2MRxI
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privateString queryCacheRegion; O;<YLS^|6
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publicvoid setCacheQueries(boolean $a+)v#?,
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cacheQueries){ 58_aI?~>>
this.cacheQueries = cacheQueries; ki|w?0s
} j_~lc,+m
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publicvoid setQueryCacheRegion(String 7j%sM&
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queryCacheRegion){ DR#[\RzNI
this.queryCacheRegion = ?8)$N
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queryCacheRegion; 8^dsx1U#
} CI,xp
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publicvoid save(finalObject entity){ `G.:G/b%H
getHibernateTemplate().save(entity); <2RxyoDL6
} _yVF+\kQ
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publicvoid persist(finalObject entity){ 6 0Obek`
getHibernateTemplate().save(entity); YiPp#0T[Gx
} J*O$)K%Hx
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publicvoid update(finalObject entity){ G6x 2!Ny
getHibernateTemplate().update(entity); dCM*4B<
} F`YxH*tO7
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publicvoid delete(finalObject entity){ gb/M@6/j
getHibernateTemplate().delete(entity); ]j?Kn$nv*S
} t9
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publicObject load(finalClass entity, tc<t%]c
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finalSerializable id){ T?E[LzZg
return getHibernateTemplate().load y7#4Mcc`~
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(entity, id); I UxsvW+
} b(H)8#C
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publicObject get(finalClass entity, n;Etn!4M
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finalSerializable id){ !4G<&hvb
return getHibernateTemplate().get H=k*;'
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(entity, id); & A<Pf.Us
} ;F<)BEXC<
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publicList findAll(finalClass entity){ ' ! ls"qo
return getHibernateTemplate().find("from Aw *:5 I[
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" + entity.getName()); c F(]`49(
} JP<Z3
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publicList findByNamedQuery(finalString l?%U*~*
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namedQuery){ \i#0:3s.
return getHibernateTemplate +C !A@
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().findByNamedQuery(namedQuery); K06/ D!RD4
} yw;!KUKb|
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publicList findByNamedQuery(finalString query, "ci<W_lx
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finalObject parameter){ ]& qmV
return getHibernateTemplate M^^u{);q
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().findByNamedQuery(query, parameter); $wn"+wX
} ,FPgbs
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publicList findByNamedQuery(finalString query, $'Hg}|53
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finalObject[] parameters){ 2O5yS
return getHibernateTemplate Aq{m42EAj
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().findByNamedQuery(query, parameters); f6P5J|'
} g3%t+>$*
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publicList find(finalString query){ VmB/X))
return getHibernateTemplate().find (IR'~:W
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(query); P( W8XC
} K9*#H(
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publicList find(finalString query, finalObject y|X\f!
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parameter){ #+eV5%Si
return getHibernateTemplate().find S-h1p`
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(query, parameter); Om0S^4y]x
} {hM*h(W~3
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public PaginationSupport findPageByCriteria R@0ELxzA
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(final DetachedCriteria detachedCriteria){ E}qeh"sJt
return findPageByCriteria pz^"~0o5
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); 2Xgw7`
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} >}/"gx
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public PaginationSupport findPageByCriteria 8X]j;Rb
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(final DetachedCriteria detachedCriteria, finalint q6{ %vd
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startIndex){ GKPqBi[rO
return findPageByCriteria /kVy#sT|
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(detachedCriteria, PaginationSupport.PAGESIZE, }~-)31e'`
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startIndex); '
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} =k`(!r2"#
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public PaginationSupport findPageByCriteria DD'<zL[
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(final DetachedCriteria detachedCriteria, finalint cuquA ~
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pageSize, mI in'M
finalint startIndex){ cVn7jxf
return(PaginationSupport) ~%Yh`c
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getHibernateTemplate().execute(new HibernateCallback(){ BoIe<{X(9
publicObject doInHibernate 7XWgY%G
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(Session session)throws HibernateException { c e=6EYl
Criteria criteria = j&m<=-q
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detachedCriteria.getExecutableCriteria(session); XW]|Mv[M
int totalCount = 1xq1te)
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((Integer) criteria.setProjection(Projections.rowCount }.zgVLL
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()).uniqueResult()).intValue(); wQnr*kyza
criteria.setProjection K{>O.5
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(null); #8|;Q`Or:
List items = %v~j10e
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criteria.setFirstResult(startIndex).setMaxResults 9i|6
0#*\o1r\p
(pageSize).list(); '}4[m>/
PaginationSupport ps = W {dx\+
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new PaginationSupport(items, totalCount, pageSize, 7@tr^JykO
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startIndex); ~P6K)V|@<
return ps; L1C'V/g
} /'VCJjzZ
}, true); ocgbBE
} YBS]JCO
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public List findAllByCriteria(final JG}U,{7(
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DetachedCriteria detachedCriteria){ ( v
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return(List) getHibernateTemplate 4N` MY8',
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().execute(new HibernateCallback(){ tg8VFH2q.z
publicObject doInHibernate 1NOz $fW
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(Session session)throws HibernateException { S-f3rL[?
Criteria criteria = 2,QkktJLo
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detachedCriteria.getExecutableCriteria(session); Y@.JW
return criteria.list(); i,yK&*>JJ
} $V~%$
}, true); Fx3VQ'%J
} s9[v_(W
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public int getCountByCriteria(final dqKTF_+VhA
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DetachedCriteria detachedCriteria){ p Y>yJ)
Integer count = (Integer) 3?5
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getHibernateTemplate().execute(new HibernateCallback(){ ":-)mfgGU
publicObject doInHibernate A<.Q&4jb
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(Session session)throws HibernateException { /{kyjf[o&*
Criteria criteria = *=|i"
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detachedCriteria.getExecutableCriteria(session); Cq(Xa-
return dNJK[1e6
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criteria.setProjection(Projections.rowCount nW drVT$
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()).uniqueResult(); hCxL4LrF
} g:o\ r
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}, true); -O_UpjR;
return count.intValue(); !w)Mm P Xb
} C,IN+@
} Gg.w-&
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用户在web层构造查询条件detachedCriteria,和可选的 KT g$^"\
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 ~hxB Pn."
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