Hibernate3 提供了DetachedCriteria,使得我们可以在Web层构造 (a}
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detachedCriteria,然后调用业务层Bean,进行动态条件查询,根
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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 ,iVPcza
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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 nnE_OK!}T
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分页支持类: ,k~j6Z
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java代码: y|.fR>5
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package com.javaeye.common.util; (
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import java.util.List; 23-t$y]
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publicclass PaginationSupport { u<]mv
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publicfinalstaticint PAGESIZE = 30; f>r3$WKj
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privateint pageSize = PAGESIZE; %X9b=%'+
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privateList items; jJVT_8J
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privateint totalCount; i<m$#6<Z
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privateint[] indexes = newint[0]; |qlS6Aln
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privateint startIndex = 0; e8WEz
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public PaginationSupport(List items, int ku9@&W+
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totalCount){ ALd]1a&
setPageSize(PAGESIZE); \2Og>{"U
setTotalCount(totalCount); Xlv#=@;O]
setItems(items);
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setStartIndex(0); e40udLH~x
} @Y
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public PaginationSupport(List items, int EqnpMHF
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totalCount, int startIndex){ 'Y!pY]Z
setPageSize(PAGESIZE); A XBkJ'jd
setTotalCount(totalCount); 7]|zkjgI
setItems(items); l(%k6
setStartIndex(startIndex); hCM8/Vvx6
} CE#\Roi x)
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public PaginationSupport(List items, int ]U,CKJF%/
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totalCount, int pageSize, int startIndex){ )nwZ/&@
setPageSize(pageSize); qL|
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setTotalCount(totalCount); B6bOEPQ
setItems(items); aDL)|>"Q
setStartIndex(startIndex); 6F`qi:a+
} pe()f/Jx(
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publicList getItems(){ )N(9pnyZH
return items; LJGJ|P
} r C_d$Jv
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publicvoid setItems(List items){ ,+tPRkwA^
this.items = items; 3J%V%}mD
} u#`+[AC`
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publicint getPageSize(){ 6&89~W{
return pageSize; _>Pk8~m
} iJdP>x
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publicvoid setPageSize(int pageSize){ 3Y
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this.pageSize = pageSize; 5W+{U8\
} +UxI{,L
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publicint getTotalCount(){ DVI7]+=nV
return totalCount; ITyzs4"VV
} XHs d-
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publicvoid setTotalCount(int totalCount){ :peqr!I+K
if(totalCount > 0){ naz:A
this.totalCount = totalCount; 2;G98H
int count = totalCount / P,i"&9 8
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pageSize; eC ~jgB
if(totalCount % pageSize > 0) ,"Tjpdf
count++; y%4 Gp
indexes = newint[count]; P5xI
for(int i = 0; i < count; i++){ q
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indexes = pageSize * Z>F@nTzb>
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} 1otspOy
}else{ 9e~WK720=
this.totalCount = 0; Z_FNIM0f
} c/
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} rvic%bsk
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publicint[] getIndexes(){ 2F1ZAl
return indexes; Y0@yD#,0~
} *Bs^NU.
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publicvoid setIndexes(int[] indexes){ P@gtdi(Q
this.indexes = indexes; Ep mJWbU
} cC%j!8!
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publicint getStartIndex(){ xO7Yt
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return startIndex; iK!dr1:wSw
} KmQ^?Ad-C
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publicvoid setStartIndex(int startIndex){ lUv =7"
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if(totalCount <= 0) xW>ySEf
this.startIndex = 0; lkA^\+Ct
elseif(startIndex >= totalCount) Cxm6TO`-;
this.startIndex = indexes ExCM<$,
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[indexes.length - 1]; T~X41d\
elseif(startIndex < 0) WfG(JJ
this.startIndex = 0; 'wZ_4XjD
else{ t?{B_Bf
this.startIndex = indexes 'T7 x@a`b)
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[startIndex / pageSize]; T C8`JU=wV
} R\5Vq$Q
} rJQ=9qn\
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publicint getNextIndex(){ .x}gg\
int nextIndex = getStartIndex() + +K^h!d]
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pageSize; 3]/.\(2
if(nextIndex >= totalCount) +TN^NE
return getStartIndex(); ~c*
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else T%(C-Quh
return nextIndex; \"x>JW4w
} sTkkM9
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publicint getPreviousIndex(){ cy|%sf`
int previousIndex = getStartIndex() - Oz{%k#X-
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pageSize; jl}$HEI5m}
if(previousIndex < 0) ]JjK#eh
return0; :l,OalO
else h^oH^moq<
return previousIndex; #.ct5
} 1fFj:p./l_
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} y+U83a[L*
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抽象业务类 |~K(F<;j
java代码: oM,- VUr
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/** cin2>3Z$
* Created on 2005-7-12 |g-b8+.=]
*/ e1/sqXWo
package com.javaeye.common.business; VWi2(@R^
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import java.io.Serializable; T3N"CUk
import java.util.List; ONX8}Ob~
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import org.hibernate.Criteria; W7=V{}b+
import org.hibernate.HibernateException; 2YOKM#N]
import org.hibernate.Session; s_ bR]G
import org.hibernate.criterion.DetachedCriteria; dqc1q:k?$
import org.hibernate.criterion.Projections; w?LrJ37u
import DBs DkkB{
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org.springframework.orm.hibernate3.HibernateCallback; j6g@tx^)'
import Rc[ 0aj:
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org.springframework.orm.hibernate3.support.HibernateDaoS A\QJLWBv^$
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upport; '6-$Xq0^E
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import com.javaeye.common.util.PaginationSupport; $_D6_|HK
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public abstract class AbstractManager extends qOy=O
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HibernateDaoSupport { `tEo]p
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privateboolean cacheQueries = false; xT*d/Oa w
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privateString queryCacheRegion; jQh^WmN
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publicvoid setCacheQueries(boolean 1||+6bRP
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cacheQueries){ E
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this.cacheQueries = cacheQueries; "Fnq>iR-
} iwF9[wAft
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publicvoid setQueryCacheRegion(String 4n0xE[-
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queryCacheRegion){ <l,o&p,>|c
this.queryCacheRegion = .Zmp ,
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queryCacheRegion; QM<y`cZ8
} .Y*f2A.v
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publicvoid save(finalObject entity){ v?:: |{
getHibernateTemplate().save(entity); kH948<fk3
} [xZU!=
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publicvoid persist(finalObject entity){ $V>yXhTh
getHibernateTemplate().save(entity); r[txlQI9
} +T{'V^
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publicvoid update(finalObject entity){ $_;e>*+x
getHibernateTemplate().update(entity); 1wj:aD?g
} C$yq\C+I
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publicvoid delete(finalObject entity){ _5Bcwa/
getHibernateTemplate().delete(entity); &^".2)zU
} 3=0E!e
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publicObject load(finalClass entity, w#y0atsg'
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finalSerializable id){ 39i9wrP
return getHibernateTemplate().load b=;nm#cAI
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(entity, id); ^K(^I*q
} C.Uju`3
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publicObject get(finalClass entity, b~m2tC=AW
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finalSerializable id){ UUe#{6Jx_
return getHibernateTemplate().get eU@Cr7@,|
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(entity, id); w'T q3-%V
} &a0r%L()X
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publicList findAll(finalClass entity){ 23F/\2MSG
return getHibernateTemplate().find("from u.XQ&
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" + entity.getName()); d3Mva,bw<
} ,:2'YB
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publicList findByNamedQuery(finalString =='Td[
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namedQuery){ ~uWOdm-"[
return getHibernateTemplate 13k
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().findByNamedQuery(namedQuery); kOwMs<1J
} g=L]S-e
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publicList findByNamedQuery(finalString query, DOS0;^f
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finalObject parameter){ ||7x;2e
return getHibernateTemplate LW6ZAETyL
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().findByNamedQuery(query, parameter); <xpph
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} #N(= 3Cj
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publicList findByNamedQuery(finalString query, M9\#Aq&\i
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finalObject[] parameters){ '@|_OmcY
return getHibernateTemplate 1$/MrPT(b
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().findByNamedQuery(query, parameters); zE T^T5>:
} B(g_Gm<
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publicList find(finalString query){ C*=Xk/0
return getHibernateTemplate().find _9 .(a
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(query); $``1PJoi
} JCx
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publicList find(finalString query, finalObject |y;}zQB-dH
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parameter){ VZr>U*J[:
return getHibernateTemplate().find `_I@i]i^
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(query, parameter); OVzt\V*+%W
} jdZ~z#`(!:
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public PaginationSupport findPageByCriteria lf{e[!ML'
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(final DetachedCriteria detachedCriteria){ k %e^kej
return findPageByCriteria {R<Ea
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(detachedCriteria, PaginationSupport.PAGESIZE, 0);
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} (
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public PaginationSupport findPageByCriteria K%<j=c
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(final DetachedCriteria detachedCriteria, finalint xJ^>pg8
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startIndex){ [v7^i_d
return findPageByCriteria $E<Esf$
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(detachedCriteria, PaginationSupport.PAGESIZE, ZRxZume<f
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startIndex); Ars687WB
} E1dD7r\
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public PaginationSupport findPageByCriteria n~"$^Vr
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(final DetachedCriteria detachedCriteria, finalint w{[=l6L m
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pageSize, 2]GdD*
finalint startIndex){ 1_fZm+oW!
return(PaginationSupport) ;{i'#rn{
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getHibernateTemplate().execute(new HibernateCallback(){ YBYZ=,"d
publicObject doInHibernate K8n4oz#z
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(Session session)throws HibernateException { 'E/*d2CDM(
Criteria criteria = 0iULCK
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detachedCriteria.getExecutableCriteria(session); ^4r73ak/):
int totalCount = #_lt~^6
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((Integer) criteria.setProjection(Projections.rowCount U~h'*nV&
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()).uniqueResult()).intValue();
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criteria.setProjection :tIC~GG]_)
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(null); *n]7
List items = 2LrJ>Mi
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criteria.setFirstResult(startIndex).setMaxResults Fc~'TBf,,`
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(pageSize).list();
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PaginationSupport ps = }kw/W#)J
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new PaginationSupport(items, totalCount, pageSize, f|^dD`
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startIndex); mRB
return ps; xe7O/',pa=
} I1[g&9,
}, true); X;<BzA!H
} :[ k4Z]t8
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public List findAllByCriteria(final (P&4d~)m
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DetachedCriteria detachedCriteria){ g{W;I_P^9
return(List) getHibernateTemplate x~.:64
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().execute(new HibernateCallback(){ &]
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publicObject doInHibernate u0P)7~%
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(Session session)throws HibernateException { [M.f-x:
Criteria criteria = k>t)g-,2
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detachedCriteria.getExecutableCriteria(session); USFDy
return criteria.list(); *x)Ozfe
} UzXE_S
}, true); pO8ePc@=D
} >iS`pb
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public int getCountByCriteria(final -(O-%
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DetachedCriteria detachedCriteria){ }FzqW*4~
Integer count = (Integer) PW3GL3+
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getHibernateTemplate().execute(new HibernateCallback(){ p>_;^&>&
publicObject doInHibernate S1D@vnZ3O\
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(Session session)throws HibernateException { Wrr cx(
Criteria criteria = :4^\3~i1X
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detachedCriteria.getExecutableCriteria(session); piU/&
return c/_+o;Bc
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criteria.setProjection(Projections.rowCount o)OUWGjb/K
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()).uniqueResult(); w8g,a]p
} ^F:k3,_[
}, true); DE2a5+^
return count.intValue(); @ym/27cRE
} ^z,_+},a3T
} iCHt1VV]
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用户在web层构造查询条件detachedCriteria,和可选的 [:^-m8QC
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startIndex,调用业务bean的相应findByCriteria方法,返回一个 88c<:fK
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PaginationSupport的实例ps。 Q,&