Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 *$ZLu jy7
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 83*"58
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据这一功能,我设计了通用的抽象Bean基类和分页类支持,代码来 */B-%*#I.
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自于Quake Wang的javaeye-core包的相应类,然后又做了很多修改 mWUo:(U
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分页支持类: LoHL}1BG-
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java代码: kan?2x
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package com.javaeye.common.util; ]M|Iy~
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import java.util.List; ,+0>p
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publicclass PaginationSupport { qMAH~P0u
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publicfinalstaticint PAGESIZE = 30; mlgw0
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privateint pageSize = PAGESIZE; ;>o}/h
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privateList items; sjLI^#a
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privateint totalCount; ,:!X]F#d$
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privateint[] indexes = newint[0]; pZRKM<k
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privateint startIndex = 0; XgUvgJ
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public PaginationSupport(List items, int gB!K{ Io'
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totalCount){ UE4zmIq
setPageSize(PAGESIZE); h' OLj#H
setTotalCount(totalCount); $x&\9CRM
setItems(items); |BD]K0
setStartIndex(0); J[:3H6%`
} Gc)
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public PaginationSupport(List items, int M2ig iR
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totalCount, int startIndex){ !$'s?rnh
setPageSize(PAGESIZE); W`fE@* k0
setTotalCount(totalCount); CB5 ~!nKv&
setItems(items); 4'pg>;*.
setStartIndex(startIndex); 0:^L>MO
} > m GO08X
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public PaginationSupport(List items, int iVM{ L
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totalCount, int pageSize, int startIndex){ h(hb?f@1:
setPageSize(pageSize); `;L0ax
setTotalCount(totalCount); W?m?r.K?
setItems(items); DXAA[hUjF
setStartIndex(startIndex); ZFy>Z:&S,
} 1!RD
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publicList getItems(){ {q2H_H
return items; hia_CuY#
} ;b:Ct <
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publicvoid setItems(List items){ 9k_3=KS3N
this.items = items; ?^9TtxM
} P%5h!Z2m
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publicint getPageSize(){ dq?q(_9
return pageSize; U$KdY _Z97
} M>df7.N7%P
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publicvoid setPageSize(int pageSize){ X]q,A5g
this.pageSize = pageSize; aTC7 H]e
} 6N
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publicint getTotalCount(){ x\j6=|
return totalCount; .IYE+XzV
} S2)rkX$
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publicvoid setTotalCount(int totalCount){ 7~[1%`
if(totalCount > 0){ 4
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this.totalCount = totalCount; zO`54^
int count = totalCount / f<A Bs4w
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pageSize; VIL #q
if(totalCount % pageSize > 0) V)\|I8"
count++; @9|sNS
indexes = newint[count]; i*j[j~2>C;
for(int i = 0; i < count; i++){ .Ev i
indexes = pageSize * (6p5Fo
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} |MvCEp
}else{
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this.totalCount = 0; JpDc3^B*
} zH8l-0I+$
} JZ&]"12]fR
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publicint[] getIndexes(){ fL4F
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return indexes; "V:B-q
} "(ehf|%>%
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publicvoid setIndexes(int[] indexes){ 5:SfPAx
this.indexes = indexes; GE=#8-@g~p
} ^I9x@t
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publicint getStartIndex(){ D.|h0gU
return startIndex; $H ^hK0?'
} m*h
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publicvoid setStartIndex(int startIndex){ |r5|IA
if(totalCount <= 0) Vin d\yvM
this.startIndex = 0; G8"L#[~
elseif(startIndex >= totalCount) |{HtY
this.startIndex = indexes )RlaVAtM
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[indexes.length - 1]; o<loc Z
elseif(startIndex < 0) UT$G?D";M
this.startIndex = 0; ,dKcxp~[
else{ 5nzkZw
this.startIndex = indexes R%XbO~{u
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[startIndex / pageSize]; =x}27f%-Mg
} %"@KuqV
} '0q.zzv|_
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publicint getNextIndex(){ p_%dH
int nextIndex = getStartIndex() + VZuluV
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pageSize; w3l2u1u
if(nextIndex >= totalCount) QL/I/EgqC
return getStartIndex(); N~NUBEKcp
else @A32|p}
return nextIndex; E,IeW {6s
} J]G]
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publicint getPreviousIndex(){ wNc.z*+O"H
int previousIndex = getStartIndex() - oVlh4"y#Lf
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pageSize; {BV0Y.O
if(previousIndex < 0) (4]M7b[S$
return0; |ppG*ee
else yuP1*QJ%
return previousIndex; H!SFSgAu
} Yzr)UJl*I
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} /=5:@
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抽象业务类 _:+hB9n s
java代码: vJ,r}$H3
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/** XXDLbT'J
* Created on 2005-7-12 b-8}TTL>
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package com.javaeye.common.business; 'G>$W+lT^
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import java.io.Serializable; {,+{,Ere
import java.util.List; = Ed0vw
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import org.hibernate.Criteria; ;F_pF+&q
import org.hibernate.HibernateException; h0.2^vM)R
import org.hibernate.Session; =h\unQ1T
import org.hibernate.criterion.DetachedCriteria; Gf=3h4
import org.hibernate.criterion.Projections; @WCA7DW!
import Z% DJ{!Hnh
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org.springframework.orm.hibernate3.HibernateCallback; ^UCH+Cyl
import }el7@Gv
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org.springframework.orm.hibernate3.support.HibernateDaoS KAJR.YNm
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upport; b4qMTRnv
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import com.javaeye.common.util.PaginationSupport; t"s$YB>}
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public abstract class AbstractManager extends PI.Zd1r
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HibernateDaoSupport { k|,Y_h0Y
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privateboolean cacheQueries = false; Lb?WhjqZ
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privateString queryCacheRegion; ..kFn!5(g
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publicvoid setCacheQueries(boolean *_Vv(H&
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cacheQueries){ 0xx4rpH
this.cacheQueries = cacheQueries; ;W T<]
} jOU99X\0
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publicvoid setQueryCacheRegion(String "O'c.v?{x
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queryCacheRegion){ +_L]d6
this.queryCacheRegion = #*q]^Is"
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queryCacheRegion; #UE}JR3g
} I 12Zh7Cc:
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publicvoid save(finalObject entity){ 2-DG6\QX|
getHibernateTemplate().save(entity); x`c7*q%
} ;Xf1BG r
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publicvoid persist(finalObject entity){ .*f6n|
getHibernateTemplate().save(entity); Dw/vXyZ
} 8k3y"239t
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publicvoid update(finalObject entity){ #IZ.px
getHibernateTemplate().update(entity); x|yJCs>
} Yn[>Y)
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publicvoid delete(finalObject entity){ w\MWr+4
getHibernateTemplate().delete(entity); B~E">}=!
} UWnF2,<s;
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publicObject load(finalClass entity, D+v?zQw
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finalSerializable id){ _
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return getHibernateTemplate().load Y6&v&dA;
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(entity, id); vQ*RrHG?c
} !(7m/R
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publicObject get(finalClass entity, Y<|JhqOXK
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finalSerializable id){ z bYv}q
return getHibernateTemplate().get umWs8-'Uw
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(entity, id); U+*l!"O,
} 1Xo0(*O
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publicList findAll(finalClass entity){ F{;#\Ob
return getHibernateTemplate().find("from \wD/TLS}
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" + entity.getName()); jan}}7Dly
} 'KIT^k0"Ih
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publicList findByNamedQuery(finalString o_`6oC"s
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namedQuery){ BK%.wi
return getHibernateTemplate 5"@>>"3U
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().findByNamedQuery(namedQuery); 2zqaR[C
} bw zx_F/
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publicList findByNamedQuery(finalString query, ,IyQmN y
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finalObject parameter){ 2L1y4nnbwo
return getHibernateTemplate wYf\!]}'
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().findByNamedQuery(query, parameter); =4MTb_
} %h@1lsm1+
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publicList findByNamedQuery(finalString query, TG}owG]]
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finalObject[] parameters){ q4[8\Ua
return getHibernateTemplate ^T!Zz"/:
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().findByNamedQuery(query, parameters); 3~T ~Bs
} ;Y\LsmZ;F
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publicList find(finalString query){ WVRIq'
return getHibernateTemplate().find &Gjpc>d
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(query); |-x-CSN
} 7.<jdp
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publicList find(finalString query, finalObject ).^d3Kp
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parameter){ xT"V9t[f
return getHibernateTemplate().find D_d>A+
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(query, parameter); KkZx6A)$u
} D{N8q^Cs9
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public PaginationSupport findPageByCriteria @}Hu)HO
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(final DetachedCriteria detachedCriteria){ %3a-@!|1<
return findPageByCriteria mcV<)UA}
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); }_'5Vb_
} ]?4;Lw
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public PaginationSupport findPageByCriteria X}k;(rb
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(final DetachedCriteria detachedCriteria, finalint =sYILe[
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startIndex){ '(5GRI<
return findPageByCriteria j+_fHADq
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(detachedCriteria, PaginationSupport.PAGESIZE, <IZt]P
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startIndex); '3b\d:hN
} 2$Mnwxfk
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public PaginationSupport findPageByCriteria Ks%0!X?3q
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(final DetachedCriteria detachedCriteria, finalint 3NpB1lgh&:
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pageSize, <T_3s\
finalint startIndex){ cT'Bp)a
return(PaginationSupport) |Vpp'ipr
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getHibernateTemplate().execute(new HibernateCallback(){ )=~&l={T
publicObject doInHibernate (TT=i
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(Session session)throws HibernateException { \(\a=
Criteria criteria = E'LI0fr
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detachedCriteria.getExecutableCriteria(session); ~tp]a]yV
int totalCount = dOeM0_o
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((Integer) criteria.setProjection(Projections.rowCount Z Ts*Y,
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()).uniqueResult()).intValue(); J p=qPG|
criteria.setProjection G)7U&B
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(null); o+1(N#?m9
List items = 0/Q_%
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criteria.setFirstResult(startIndex).setMaxResults N
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(pageSize).list(); '##?PQ*u
PaginationSupport ps = xvTtA61Vp
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new PaginationSupport(items, totalCount, pageSize, ahl|N`
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startIndex); O\=Z;}<N
return ps; y[ dBmTY
} :xsZz$
}, true); bsQ'kBD
} /]U$OP*0
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public List findAllByCriteria(final >6C\T@{lJ
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DetachedCriteria detachedCriteria){ d4b!
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return(List) getHibernateTemplate s-CAo~,
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().execute(new HibernateCallback(){ 1clzDwW
publicObject doInHibernate K&[0`sH!
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(Session session)throws HibernateException { ]t0o%w
Criteria criteria = }U7IMONU
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detachedCriteria.getExecutableCriteria(session); dy6zrgxygP
return criteria.list(); !~E/Rp
} )?72 +X
}, true); g(&cq
} |<{SSA
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public int getCountByCriteria(final *8)?ZZMM
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DetachedCriteria detachedCriteria){ \6
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Integer count = (Integer) &eV5#Ph
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getHibernateTemplate().execute(new HibernateCallback(){ ?w/p 9j#
publicObject doInHibernate I!/EQO|
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(Session session)throws HibernateException { 7#)k-S!B
Criteria criteria = WoXAOj%iW
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detachedCriteria.getExecutableCriteria(session); ?,VpZ%Df2
return `O7vPE
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criteria.setProjection(Projections.rowCount 4<s;xSCL
<);j5)/
()).uniqueResult(); =)bOteWM
} _L8&.=4]i
}, true); R V#w0 r
return count.intValue(); }P2*MrkcHB
} 4s
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} ;*5z&1O
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用户在web层构造查询条件detachedCriteria,和可选的 %#%YU|4R
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 !o|
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PaginationSupport的实例ps。 =)y$&Y