Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 ibc/x v2
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 U.F65KaKF
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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 MX0B$yc$
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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 RGLA}|
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分页支持类: *]6dV'
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java代码: iIw
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package com.javaeye.common.util; 9p4U\hx
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import java.util.List; 5Z,lWp2A
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publicclass PaginationSupport { ~`E4E
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publicfinalstaticint PAGESIZE = 30; i=oa"^c4
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privateint pageSize = PAGESIZE; ,GnU]f
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privateList items; g:M7/- "
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privateint totalCount; !S-U8KI|
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privateint[] indexes = newint[0]; 1[`<JCFClc
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privateint startIndex = 0; |u;PU`^-z
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public PaginationSupport(List items, int se HbwO3 b
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totalCount){ gu[dw3L
setPageSize(PAGESIZE); p d3&AsU
setTotalCount(totalCount); Vb9N~v
setItems(items); RAI&;"
setStartIndex(0); :Qo
} 30E v"
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public PaginationSupport(List items, int 8k^y.B
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totalCount, int startIndex){ vqi$}=%n?W
setPageSize(PAGESIZE); X2YOD2<v
setTotalCount(totalCount); )"uG*}\?b
setItems(items); <,4(3 >js
setStartIndex(startIndex); veg!mY2&
} 9/(c cj
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public PaginationSupport(List items, int 1T,PC?vr{
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totalCount, int pageSize, int startIndex){ i%4k5[f.:
setPageSize(pageSize); i(iP}:3
setTotalCount(totalCount); ?(8%SPRk
setItems(items); y?#J`o-
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setStartIndex(startIndex); B!ibE<7,
} g+)\/n|
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publicList getItems(){ Z[S+L"0
return items; hyfnIb@~}
} PZRn6Tc
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publicvoid setItems(List items){ *;E+9^:V
this.items = items; {b0&qV
} 'A!/pUML
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publicint getPageSize(){ /&as)
return pageSize; rE `}?d
} E0^%|Mh]b
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publicvoid setPageSize(int pageSize){ 3,L3C9V'
this.pageSize = pageSize; u7P+^A97L_
} cNlY=L
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publicint getTotalCount(){ S5u#g`I]
return totalCount; poYAiq_3T
} <Iyot]E
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publicvoid setTotalCount(int totalCount){ [RPAkp
if(totalCount > 0){ UW[{d/.wC
this.totalCount = totalCount; EQ63VF
int count = totalCount / Jhy
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pageSize; 7Ljj#!`lUp
if(totalCount % pageSize > 0) =/JF-#n/MA
count++; 6y,P4O*q
indexes = newint[count]; _s^:zPl
for(int i = 0; i < count; i++){
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indexes = pageSize * qJXsf M6
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} :@%-f:iDj
}else{ L@n6N|[_
this.totalCount = 0; ~K-*q{6Q
} 1m<?Q&|m$
} JV]u(PL
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publicint[] getIndexes(){ .d~]e2x
return indexes; c\)&yGE
} yvooM'R
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publicvoid setIndexes(int[] indexes){ seuN,jpt
this.indexes = indexes; ocl47)
} &xBK\
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publicint getStartIndex(){ Bq~hV;9nf
return startIndex; 8S1P&+iKs
} O/Y\ps3r
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publicvoid setStartIndex(int startIndex){ Uc&6=5~Ys\
if(totalCount <= 0) 5&<d2EG6l'
this.startIndex = 0; |ON&._`LH
elseif(startIndex >= totalCount) yD[zzEuQ
this.startIndex = indexes xv$)u<Ve
pdi=6<?bd
[indexes.length - 1]; "s>fV9YyZ
elseif(startIndex < 0) p<HTJ0
this.startIndex = 0; 3_L1Wm
else{ S~k 0@
this.startIndex = indexes h
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[startIndex / pageSize]; lk[G;=K:.
} (}{_]X|e
} H~[LJ5x
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publicint getNextIndex(){ $bZu^d,
int nextIndex = getStartIndex() +
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pageSize; }z%OnP
if(nextIndex >= totalCount) 3tT|9Tb@
return getStartIndex(); <H5n>3#pH
else (ve+,H6w\
return nextIndex; 9Hf*cQ
} YVB%
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publicint getPreviousIndex(){ ~LawF_]6
int previousIndex = getStartIndex() - r]k*7PK
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pageSize; GA|/7[I}
if(previousIndex < 0) ^oQekga\l
return0; y#S1c)vU
else ]urK$
return previousIndex; klgv{_b
} cVQatm
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} YXF#c)#
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抽象业务类 \s=QiPK
java代码: "A%MVym."
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/** EVR! @6@
* Created on 2005-7-12 xN6?yr
*/ $ "Afy)Ir
package com.javaeye.common.business; <z^SZ~G
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import java.io.Serializable; A?e,U,
import java.util.List; z{%oJ_
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import org.hibernate.Criteria; YVo ao#!
import org.hibernate.HibernateException; t-_#Q bzE{
import org.hibernate.Session; sNL+F
import org.hibernate.criterion.DetachedCriteria; &a.']!$^"
import org.hibernate.criterion.Projections; neF8V"-u&
import (FuEd11R
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org.springframework.orm.hibernate3.HibernateCallback; _0K.Fk*(!
import \fTTkpM
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org.springframework.orm.hibernate3.support.HibernateDaoS {o( *
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upport; 012Lwd
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import com.javaeye.common.util.PaginationSupport; @a0Q0M
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public abstract class AbstractManager extends =LOk13l\"
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HibernateDaoSupport { P/G>/MD/l
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privateboolean cacheQueries = false; KzNm^^#/$A
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privateString queryCacheRegion; E=]]b;u-n
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publicvoid setCacheQueries(boolean GJ,aRI
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cacheQueries){ R&*@@F-dx
this.cacheQueries = cacheQueries; O%&cE*eX
} 6]n/+[ ks
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publicvoid setQueryCacheRegion(String _~&9*D$
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queryCacheRegion){ ,EI:gLH
this.queryCacheRegion = `eR 7H>I
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queryCacheRegion; I ]9C_
} Hhl-E:"H`
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publicvoid save(finalObject entity){ ),`8eQC
getHibernateTemplate().save(entity); )+EN$*H
} p0VUh!
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publicvoid persist(finalObject entity){
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getHibernateTemplate().save(entity); +qy6d7^
} g`[$XiR
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publicvoid update(finalObject entity){ q7_+}"i
getHibernateTemplate().update(entity); pr rT:Y
} :FHA]oec1
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publicvoid delete(finalObject entity){ t)a;/scT
getHibernateTemplate().delete(entity); pW|u P8#
} JN(-.8<
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publicObject load(finalClass entity,
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finalSerializable id){ b1-&v|L
return getHibernateTemplate().load Q2QY* A
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(entity, id); tj5giQ3DG)
} v("wKHWTI@
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publicObject get(finalClass entity, Dl,`\b@Fw3
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finalSerializable id){ <Ef[c@3
return getHibernateTemplate().get +B"0{>n}F
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(entity, id); +ts0^;QO2{
} Or+p%K}-7
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publicList findAll(finalClass entity){ \#Up|u:
return getHibernateTemplate().find("from ^?GmrHC)
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" + entity.getName()); f.xA_Y>
} Qa4MZj;$K
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publicList findByNamedQuery(finalString vjUp *R>h
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namedQuery){ 57I}RMT"
return getHibernateTemplate 2A:,;~UH
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().findByNamedQuery(namedQuery); {/8Q)2*>0
} {eT.SO
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publicList findByNamedQuery(finalString query, TO#Pz.)>B6
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finalObject parameter){ kOrl\_!z3
return getHibernateTemplate !0}\&<8/m
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().findByNamedQuery(query, parameter); o
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} sen=0SB/
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publicList findByNamedQuery(finalString query, 6lFfS!ZFA
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finalObject[] parameters){ Ol/N}M|3
return getHibernateTemplate n"D ?I
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().findByNamedQuery(query, parameters); L
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} U5r}6D!)
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publicList find(finalString query){ ~mp0B9L%
return getHibernateTemplate().find 1KE:[YQ1
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(query); Ey`h1Y
} IDFFc&
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publicList find(finalString query, finalObject 5/0j}_pP
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parameter){ )A8v];.]3
return getHibernateTemplate().find \2v"YVWw
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(query, parameter);
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} dA~
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public PaginationSupport findPageByCriteria ~Ci{3j :]
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(final DetachedCriteria detachedCriteria){ MgMD\
return findPageByCriteria lS5ny
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); {S.>BXX
} V"KS[>>f
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public PaginationSupport findPageByCriteria a[!%Ld
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(final DetachedCriteria detachedCriteria, finalint j;~%lg=)
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startIndex){ ;{Ux_JEg
return findPageByCriteria Kq6jw/T
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(detachedCriteria, PaginationSupport.PAGESIZE, 45 >XKr.%
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startIndex); PL=^}{r
} @C8DZ5)
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public PaginationSupport findPageByCriteria _8?o'<!8?^
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(final DetachedCriteria detachedCriteria, finalint /F/;G*n
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pageSize, ssQ BSbx
finalint startIndex){ 2\<.0
return(PaginationSupport) ps|)cW3`
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getHibernateTemplate().execute(new HibernateCallback(){ tln37vq
publicObject doInHibernate 5]Ajf;W\
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(Session session)throws HibernateException { r?$?;%|C
Criteria criteria = w}cY6O,1
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detachedCriteria.getExecutableCriteria(session); Yl cbW0'c
int totalCount = V*[b}Xew
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((Integer) criteria.setProjection(Projections.rowCount [\z/Lbn
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()).uniqueResult()).intValue(); AONDx3[
criteria.setProjection k+ o|0
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(null); R!\EKH
List items = .p`
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criteria.setFirstResult(startIndex).setMaxResults Rd*[%)
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(pageSize).list(); ~p1EF;4 #
PaginationSupport ps = X@2-*so<
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new PaginationSupport(items, totalCount, pageSize, Zo-$z8
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startIndex); g{k1&|
return ps; ]3{0J
} :3h{ A`u
}, true); uRV<?y%
} Av J4\
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public List findAllByCriteria(final ~`MS~,,
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DetachedCriteria detachedCriteria){ l:B;zi`)oB
return(List) getHibernateTemplate 1`0#HSO
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().execute(new HibernateCallback(){ Y-!YhWsS
publicObject doInHibernate :a[Ihqfg
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(Session session)throws HibernateException { 22hSove.
Criteria criteria = V<Z'(UI
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detachedCriteria.getExecutableCriteria(session); ~EiH-z4U
return criteria.list(); n||A" @b\
} ?i\;:<e4
}, true); uYI@9U
} y^>Q/H\
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public int getCountByCriteria(final 4<,|*hAT
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DetachedCriteria detachedCriteria){ zt24qTKL
Integer count = (Integer) k3!a$0Bs;
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getHibernateTemplate().execute(new HibernateCallback(){ 1Nn@L2b 2
publicObject doInHibernate Yf_6PGNzX
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(Session session)throws HibernateException { q6#<[ 4?
Criteria criteria = R6;Phdh<>
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detachedCriteria.getExecutableCriteria(session); ;zTuKex~
return .>g1$rj
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criteria.setProjection(Projections.rowCount +\
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()).uniqueResult(); 5/><$06rq
} ^?"\?M1
}, true); bp<^R
return count.intValue(); /hW d/H]
} !\ND(
} V)M1YZV{
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用户在web层构造查询条件detachedCriteria,和可选的 5FKBv
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 ?WI3/>:<
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PaginationSupport的实例ps。 fN%jJ-[d
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ps.getItems()得到已分页好的结果集 ZM#=`k9
ps.getIndexes()得到分页索引的数组 _mE^rT
ps.getTotalCount()得到总结果数 P@}P k
ps.getStartIndex()当前分页索引 j|fd-<ng
ps.getNextIndex()下一页索引 le)DgIT>=
ps.getPreviousIndex()上一页索引 8ip7^
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