Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 S[zX@3eZV
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根 eXdE?j
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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 y$7vJl.uS/
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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 ,fa'
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分页支持类: 2sryhS'(H
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java代码: d@ ?++z
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package com.javaeye.common.util; RMfKM!
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import java.util.List; 'q_^28rK
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publicclass PaginationSupport { i6@c@n
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publicfinalstaticint PAGESIZE = 30; 5UgxuuP4
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privateint pageSize = PAGESIZE; \(db1zmS~
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privateList items; v3ky;~ke
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privateint totalCount; ;`f14Fb
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privateint[] indexes = newint[0]; \=yWJ
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privateint startIndex = 0; OrJuE[R.
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public PaginationSupport(List items, int G'M;]R9EP
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totalCount){ k+D"LA%J
setPageSize(PAGESIZE); ?b8 :
setTotalCount(totalCount); KT>eE
setItems(items); oN\IQ7oI
setStartIndex(0); BsJ
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} ,3As
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public PaginationSupport(List items, int m/T3Um
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totalCount, int startIndex){ ?E*;fDEC
setPageSize(PAGESIZE); oieJ7\h]m
setTotalCount(totalCount); 3;hztCZj
setItems(items); hN5?u:
setStartIndex(startIndex); m 3Y@p$i5
} fQkfU;5
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public PaginationSupport(List items, int '=Z]mi/aw
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totalCount, int pageSize, int startIndex){ .EF(<JC?
setPageSize(pageSize); b 5u8j
setTotalCount(totalCount); ZgzjRa++
setItems(items); I+VL~'VlS
setStartIndex(startIndex); BIk0n;Kz<L
} xRI7_8Jpyn
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publicList getItems(){ C;UqLMrOI
return items; WP5QA8`3
} YcaomPo
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publicvoid setItems(List items){ @F-InfB8.
this.items = items; Vx<`6uv
} XB.xIApmy
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publicint getPageSize(){ `+\6;nM
return pageSize; L2,.af6+
} Ki,SFww8r
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publicvoid setPageSize(int pageSize){ &qjc+-r{l
this.pageSize = pageSize; 1z6$>{FUR
} wOLDHg_
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publicint getTotalCount(){ S <RbC
return totalCount; n?[JPG2X
} 0|J]EsPxu
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publicvoid setTotalCount(int totalCount){ R[#vFQ
if(totalCount > 0){ +I$,Y~&`>
this.totalCount = totalCount; /FthT
int count = totalCount / Xv&&U@7
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pageSize; yZ:AJNb
if(totalCount % pageSize > 0) ms]r1x"
count++; 6/5Xy69:h
indexes = newint[count]; =<;C5kSD
for(int i = 0; i < count; i++){ cEK<CV
indexes = pageSize * x@)G@'vV|
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} Xt.ca,`U
}else{ _ g8CvH)?!
this.totalCount = 0; E-`3}"{
} p=jpk@RX
} #lY_XV.
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publicint[] getIndexes(){ x<'<E@jpU;
return indexes; ]J(BaX4
} @PZ{(
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publicvoid setIndexes(int[] indexes){ wU5.t-|`
this.indexes = indexes; V"Sa9P{y"
} !0Mx Bem
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publicint getStartIndex(){ euyd(y$'k
return startIndex; @"G+kLv0
} =`KA@~XH4
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publicvoid setStartIndex(int startIndex){ Mgp+#w+,
if(totalCount <= 0) T\wfYuc&X
this.startIndex = 0; KbSE=3
elseif(startIndex >= totalCount) +Zg@X.z
this.startIndex = indexes cFZcBiw
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[indexes.length - 1]; )vsX (/WU
elseif(startIndex < 0) QG=K^g
this.startIndex = 0; II'"Nkxd
else{ 9Rm\@E
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this.startIndex = indexes xjy(f~'
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[startIndex / pageSize]; ,gdud[&|;
} rQD^O4j R
} OfK>-8
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publicint getNextIndex(){ &e6!/y&
int nextIndex = getStartIndex() + ^?8/9o
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pageSize; F;L8FL-
if(nextIndex >= totalCount) |Zk2]eUO+
return getStartIndex(); y}U}AUt
else sR4B/1'E
return nextIndex; o* ~aB_
} f}t8V% ^E
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publicint getPreviousIndex(){ {[)n<.n[g
int previousIndex = getStartIndex() - vB%os Qm
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pageSize; n'@*RvI:
if(previousIndex < 0) >/4N :=.h
return0; ]Zz.n5c
else ueyQ&+6r
return previousIndex; 2}n7f7[/b
} \2^o,1r/
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} SU5O+;{`'
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抽象业务类 SJ2l6
java代码: UDT\Xc
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/** kMx)G]
* Created on 2005-7-12 ;pw9+zo^M
*/ fKW)h?.Kd
package com.javaeye.common.business; =NmW}x|n
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import java.io.Serializable; 5P{[8PZxbV
import java.util.List; b_X&>^4Dkl
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import org.hibernate.Criteria; bq2f?uD-}
import org.hibernate.HibernateException; Ms#rvn!J
import org.hibernate.Session; p ,.6sk
import org.hibernate.criterion.DetachedCriteria; aJQzM
import org.hibernate.criterion.Projections; U=WS]
import b Rc,Y<
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org.springframework.orm.hibernate3.HibernateCallback; _G&gF.|
import jU-aa+
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org.springframework.orm.hibernate3.support.HibernateDaoS PIAE6,*
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upport; iB|htH'T
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import com.javaeye.common.util.PaginationSupport; DL<;qhte
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public abstract class AbstractManager extends guG&3{&\s
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HibernateDaoSupport { WvZt~x&2
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privateboolean cacheQueries = false; :(\JY?+w
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privateString queryCacheRegion; G
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publicvoid setCacheQueries(boolean UiVGOQq
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cacheQueries){ 58d[>0Xa[g
this.cacheQueries = cacheQueries; \wDL oR
} r1TdjnP,2^
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publicvoid setQueryCacheRegion(String Gr 4v&Mz:
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queryCacheRegion){ 9Z2 1|5
this.queryCacheRegion = JA*+F1s
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queryCacheRegion; ah%Ws#&
} <D P8a<{{
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publicvoid save(finalObject entity){
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getHibernateTemplate().save(entity); YS#*#!ZMn?
} )Gm9x]SVl
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publicvoid persist(finalObject entity){ 3FtL<7B'.
getHibernateTemplate().save(entity); \_
} 1Au+X3
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publicvoid update(finalObject entity){ 2e-`V5{)b
getHibernateTemplate().update(entity); x0b=r!Duu
} zO---}[9a
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publicvoid delete(finalObject entity){ BN `2UVH
getHibernateTemplate().delete(entity); :G6aO
} r^a:s]
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publicObject load(finalClass entity, ="5D}%
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finalSerializable id){ <=V{tl
return getHibernateTemplate().load @TQ/Z$y
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(entity, id); @gfW*PNjlP
} lKB9n}P
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publicObject get(finalClass entity, >[Wjzg
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finalSerializable id){ b"Q8[k |d
return getHibernateTemplate().get Aj|->Y
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(entity, id); 33EF/k3vW
} Av?R6
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publicList findAll(finalClass entity){ 3LT~-SvL
return getHibernateTemplate().find("from w|6/ i/X
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" + entity.getName()); lcm3wJ'w
} E*u*LMm
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publicList findByNamedQuery(finalString oOaFA+0x
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namedQuery){ aopZ-^
return getHibernateTemplate #-\5O
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().findByNamedQuery(namedQuery); 4qz+cB_
} bD0l^?Hu!
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publicList findByNamedQuery(finalString query, Q"ZpT
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finalObject parameter){ *V%"q|L8
return getHibernateTemplate K6t"98
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().findByNamedQuery(query, parameter); rHTZM,zM=H
} !8[T*'LJ-
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publicList findByNamedQuery(finalString query, DtFHh/X
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finalObject[] parameters){ ",.f
return getHibernateTemplate Sz@z
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().findByNamedQuery(query, parameters); Jz~:
} !9WGZfK+0Y
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publicList find(finalString query){ >]pZ;e$
return getHibernateTemplate().find |67Jw2
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(query); zQ|2D*W
} t\hnnu`Pq
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publicList find(finalString query, finalObject Zs
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parameter){ XQ]vJQYIR
return getHibernateTemplate().find a1~|?PCbY
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(query, parameter); XZb=;tYo
} o6px1C:
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public PaginationSupport findPageByCriteria y\Aa;pL)RQ
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(final DetachedCriteria detachedCriteria){ u"=]cBRWL6
return findPageByCriteria j*<J&/luYZ
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(detachedCriteria, PaginationSupport.PAGESIZE, 0); xeSch?}
} W|m(Jh[w]
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public PaginationSupport findPageByCriteria ZK8)FmT_<O
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(final DetachedCriteria detachedCriteria, finalint X|T|iB,vT
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startIndex){ SjB"#E)
return findPageByCriteria \jwG*a
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(detachedCriteria, PaginationSupport.PAGESIZE, a]u.Uqyx2w
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startIndex); UeO/<ml3>J
} VKDOM0{V
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public PaginationSupport findPageByCriteria d\JaYizp
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(final DetachedCriteria detachedCriteria, finalint #QoWneZ
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pageSize, =G:Krc8w@
finalint startIndex){ `/PBZnj
return(PaginationSupport) ;[}OZt
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getHibernateTemplate().execute(new HibernateCallback(){ D<6$@ZJ
publicObject doInHibernate reN\|?0{
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(Session session)throws HibernateException { |O_JUl
Criteria criteria = ]ub"OsXC
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detachedCriteria.getExecutableCriteria(session); X\h.@+f=
int totalCount = |@X^_L.!
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((Integer) criteria.setProjection(Projections.rowCount ;DuVb2~+
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()).uniqueResult()).intValue(); 'z.
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criteria.setProjection ^~H{I_Y
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(null); <R]m(
List items = {s
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criteria.setFirstResult(startIndex).setMaxResults zWC| Qe
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(pageSize).list(); z< L2W",
PaginationSupport ps = EfEgY|V0
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new PaginationSupport(items, totalCount, pageSize, [=>=5'-
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startIndex); [[ie
return ps; GQtNk<?$I
} i!%bz
}, true); uvbVb"\"Yk
} bFG~08Z ,d
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public List findAllByCriteria(final W~
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DetachedCriteria detachedCriteria){ Hh1_zd|
return(List) getHibernateTemplate XGB\rfvS
@ b!]Jw
().execute(new HibernateCallback(){ .yj@hpJM
publicObject doInHibernate 4/b.;$
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(Session session)throws HibernateException { B>fZH\Y
Criteria criteria = y0d=
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detachedCriteria.getExecutableCriteria(session); ,m=G9QcN
return criteria.list(); EB[T 5{
} u}iuf_
}, true); $X#y9<bW
} <N vw*yA
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public int getCountByCriteria(final IEhD5?
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DetachedCriteria detachedCriteria){ Kv|
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Integer count = (Integer) 0SI@`C*1o
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getHibernateTemplate().execute(new HibernateCallback(){ PR@6=[|d
publicObject doInHibernate KR>)Ek
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(Session session)throws HibernateException { /f#b;qa,
Criteria criteria = OIP]9lM$nC
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detachedCriteria.getExecutableCriteria(session); z%D7x5!,R
return KoERg&fY
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criteria.setProjection(Projections.rowCount V'i-pn2gyu
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()).uniqueResult(); 0vv~G\yM
} 0nb%+],pX
}, true); TF8#I28AD
return count.intValue(); ^p3GT6
} j9+4},>>CU
} `WayR^ 9
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用户在web层构造查询条件detachedCriteria,和可选的 [~9UsHfH
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 x"b'Pmw
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PaginationSupport的实例ps。 C8-7XQ=B:b
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ps.getItems()得到已分页好的结果集 cXb*d|-|N
ps.getIndexes()得到分页索引的数组 o!tC{"g
ps.getTotalCount()得到总结果数 K?uZIDo
ps.getStartIndex()当前分页索引 +x2JC' -H
ps.getNextIndex()下一页索引 CYaN;HV@_
ps.getPreviousIndex()上一页索引 7X>IS#W]
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