Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 +vBi7#&
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 \Wbmmd}8
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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 ys[Li.s:
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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 _Nx
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分页支持类: x#rgFY,TY
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java代码: @/2Kfr
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package com.javaeye.common.util; &!!*xv-z
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import java.util.List; ?jx]%n fV
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publicclass PaginationSupport { nm'l}/Ug
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publicfinalstaticint PAGESIZE = 30; 7Cgi&
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privateint pageSize = PAGESIZE; u
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privateList items; >oh H4:
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privateint totalCount; g=*jKSZ
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privateint[] indexes = newint[0]; Nw;qJ58@
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privateint startIndex = 0; &|yLTx
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public PaginationSupport(List items, int rK3kg2H
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totalCount){ .@1+}0
setPageSize(PAGESIZE);
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setTotalCount(totalCount); h`[$
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setItems(items); ,75)
setStartIndex(0); *~rj!N?;
} Q
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public PaginationSupport(List items, int pYr"3BwG
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totalCount, int startIndex){ tbrU>KCBD
setPageSize(PAGESIZE); tgRj8
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setTotalCount(totalCount); o)`PSw=
setItems(items); -,bFGTvYQ
setStartIndex(startIndex); %X}ZX|{ O
} blO4)7m
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public PaginationSupport(List items, int MP]<m7669*
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totalCount, int pageSize, int startIndex){ e`*}?N4d
setPageSize(pageSize); ]#/nn),Z
setTotalCount(totalCount); t,/ G
setItems(items); )"?4d[ 5
setStartIndex(startIndex); SV7;B?e%Y
} (?FH`<
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publicList getItems(){ Ufr@j` *
return items; pR0[qsQM
} ,Oo`*'a[o7
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publicvoid setItems(List items){ EF/d7
this.items = items; {X{R]
} C.j+Zb1Z(
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publicint getPageSize(){ ,'L>:pF3
return pageSize; PyeNu3Il4
} 6[bopin
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publicvoid setPageSize(int pageSize){ 6BE,L
this.pageSize = pageSize; ep>!jMhJa
} V&Y`?Edc
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publicint getTotalCount(){ _nGx[1G( 5
return totalCount; qGk+4 yC
} #2Rz=QI
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publicvoid setTotalCount(int totalCount){ }F08o,`?
if(totalCount > 0){ 4pmeu:26
this.totalCount = totalCount; =lacfPS
int count = totalCount / U,GSWMI/K
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pageSize;
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if(totalCount % pageSize > 0) T,38Pu@r
count++; ,@$5,rNf
indexes = newint[count]; g[xoS\d
for(int i = 0; i < count; i++){ 0uy'Py@2<
indexes = pageSize * # :+Nr
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} !j~wAdHk
}else{ DP_b9o
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this.totalCount = 0; Iix,}kzss
} r&=ulg
} "8za'@D"f
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publicint[] getIndexes(){ +LHU}'|
return indexes; *CN *G"
} d3%qYL_+a
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publicvoid setIndexes(int[] indexes){ 4P{|H
this.indexes = indexes; srS!X$cec
} A|biOz
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publicint getStartIndex(){
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return startIndex; nnlj#
} Z[O
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publicvoid setStartIndex(int startIndex){ s.1F=u9a
if(totalCount <= 0) y6 (L=$+B
this.startIndex = 0; 4[ uqsJB
elseif(startIndex >= totalCount) G?4@[m
this.startIndex = indexes O]: 9va
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[indexes.length - 1]; $v>q'8d
elseif(startIndex < 0) A;cA|`b
this.startIndex = 0; _|~Dj)z
else{ =<\22d5L
this.startIndex = indexes R~<N*En~
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[startIndex / pageSize]; XQ1]F{?/H
} 18$d-[hX
} H3wJ5-q(
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publicint getNextIndex(){ G1|1Z5r
int nextIndex = getStartIndex() + i0M6;W1T
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pageSize; (l5p_x
if(nextIndex >= totalCount) 5Fy dh0.
return getStartIndex(); =DwLNyjU4
else N^
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return nextIndex; wd:Yy
}
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publicint getPreviousIndex(){ WZa6*pF
int previousIndex = getStartIndex() - -TD\?Q
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pageSize; (bm^R-SbB
if(previousIndex < 0) bH+NRNI]
return0; VQIvu)I
else [;m@A\F
return previousIndex; TX)W.2u=
} dv+Gv7&2/
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} LhG\)>Y%
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抽象业务类 S1|5+PPs
java代码: $f@YQN=
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/** coCT]<
* Created on 2005-7-12 Kp7DI0~
*/ Kebr>t8^
package com.javaeye.common.business; hp f0fU
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import java.io.Serializable; <NZPLo F
import java.util.List; e&sH<hWR
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import org.hibernate.Criteria; \Zf=A[
import org.hibernate.HibernateException; ByqVNz0L
import org.hibernate.Session; QC'Ru'8S
import org.hibernate.criterion.DetachedCriteria; i]n2\v AG
import org.hibernate.criterion.Projections; cGm3LS6]*
import Z/,R{Jgt"
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org.springframework.orm.hibernate3.HibernateCallback; yPE3Awh5
import U\%r33L )
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org.springframework.orm.hibernate3.support.HibernateDaoS O=__w *<
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upport; !-M Y<'
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import com.javaeye.common.util.PaginationSupport; YCRE- 5!
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public abstract class AbstractManager extends zS:2?VXxq
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HibernateDaoSupport { eipg,EI
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privateboolean cacheQueries = false; zgY VB}
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privateString queryCacheRegion; "U^m~N9k{
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publicvoid setCacheQueries(boolean Oj-\
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cacheQueries){ pPa]@ z~O
this.cacheQueries = cacheQueries; .B~}hjOZK
} B*_K}5UO
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publicvoid setQueryCacheRegion(String uD/@d'd_4L
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queryCacheRegion){ UvGxA[~2+
this.queryCacheRegion = 4T3Z9KD!8
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queryCacheRegion; QM8Ic,QFvo
} R*vQvO%)h
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publicvoid save(finalObject entity){ Vw H|ed$
getHibernateTemplate().save(entity); eP"B3Jw
} ^mn!;nu
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publicvoid persist(finalObject entity){ *EGzFXa
getHibernateTemplate().save(entity); |&"aZ!Kn
} ^"O>EY':
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publicvoid update(finalObject entity){ 7tWC<#
getHibernateTemplate().update(entity); 9287&+,0r
} {@CQ
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publicvoid delete(finalObject entity){ uGz)Vz&3
getHibernateTemplate().delete(entity); 4GP?t4][
} |dQz(z&6{5
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publicObject load(finalClass entity, _{c_z*rM8
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finalSerializable id){ cO7ii~&%!
return getHibernateTemplate().load @\nQ{\^;
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(entity, id); z=KDkpV
} `E1G9BbU
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publicObject get(finalClass entity, 6HZtdRQF
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finalSerializable id){
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return getHibernateTemplate().get L9O;K$[s
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(entity, id); ^+Nd\tp
} \t)va:y
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publicList findAll(finalClass entity){ [L X/O@
return getHibernateTemplate().find("from zoi0Z
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" + entity.getName()); -XXsob}/8
} .KKecdd?=
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publicList findByNamedQuery(finalString
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namedQuery){ ic`BDkNO
return getHibernateTemplate iXy1{=BDv
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().findByNamedQuery(namedQuery); nEu:& 4
} Ik^^8@z
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publicList findByNamedQuery(finalString query, xh:I]('R
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finalObject parameter){ h#Z["BG
return getHibernateTemplate ["f6Ern
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().findByNamedQuery(query, parameter); w r"0+J7
} c45s
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publicList findByNamedQuery(finalString query, P}~MO)*1
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finalObject[] parameters){ ,V,mz?d^9
return getHibernateTemplate ya1
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().findByNamedQuery(query, parameters); 7:olStK
} ^P@:CBO
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publicList find(finalString query){ Fn.JtIu
return getHibernateTemplate().find ;+XrCy!.)L
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(query); B?i#m^S
} 'y;Kj
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publicList find(finalString query, finalObject A0Nx?
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parameter){ b]b>i]n
return getHibernateTemplate().find y@l&B+2ks
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(query, parameter); V5(_7b#z``
} FA*$ dwp
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public PaginationSupport findPageByCriteria %Zk6K!MY#
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(final DetachedCriteria detachedCriteria){ 9no<;1+j,
return findPageByCriteria WF`%7A39Af
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); zQulPU
} >fWGiFmlk
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public PaginationSupport findPageByCriteria 9{OO'at?
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(final DetachedCriteria detachedCriteria, finalint (*$F7oO<
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startIndex){ FShjUl>mV
return findPageByCriteria I;NW!"pU
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(detachedCriteria, PaginationSupport.PAGESIZE, l SdA7
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startIndex); q~
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} nSyLt6zn\
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public PaginationSupport findPageByCriteria }
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(final DetachedCriteria detachedCriteria, finalint 2>9\o]ac4
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pageSize, ]6B9\C.2-_
finalint startIndex){ b_RO%L:"yL
return(PaginationSupport) `B@eeXa;u
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getHibernateTemplate().execute(new HibernateCallback(){ :|s;2Y
publicObject doInHibernate D/Ki^E
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(Session session)throws HibernateException { i'li;xUhZ
Criteria criteria = ^(^P#EEG
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detachedCriteria.getExecutableCriteria(session); ISC>]`
int totalCount = `[5xncZ-
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((Integer) criteria.setProjection(Projections.rowCount mv99SOe[Fz
g@^ y$wt
()).uniqueResult()).intValue(); U!q2bF<@
criteria.setProjection x
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(null); ]:Ep1DIMl
List items = K9EHT-
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criteria.setFirstResult(startIndex).setMaxResults w>j5oz}
}d}gb`Du
(pageSize).list(); QD,m`7(
PaginationSupport ps = k_]'?f7Z
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new PaginationSupport(items, totalCount, pageSize, !6=s{V&r1
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startIndex); ?\,;KNQr
return ps; 5%\K
} K>+ v" x
}, true); uuEvH<1
} +:@^nPfHy
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public List findAllByCriteria(final =F_uK7W
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DetachedCriteria detachedCriteria){ -lJ|x>PG'
return(List) getHibernateTemplate &m