简谈hibernate 简化继承映射 外文翻译

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1、简谈Hibernate简化继承映射外文翻译简谈Hibernate简化继承映射外文翻译导读：Hibernate简化继承映射外文翻译ureJavaobject-relationalmappingandpersistenceframeapplainoldJavaobjectstorelationaldatabasetablesusingXMLconfigurationfiles.UsingHibernatecansavealotofdevelopmenttimeonaproject,sincetheanagedbytheframeeans内蒙

2、古工业大学本科毕业设计外文文献翻译HibernatesimplifiesinheritancemappingHibernateisanobject-relationalmappingandpersistenceframeintrospectiontopolymorphismandinheritancemapping.Butmappingclasshierarchiestoarelationaldatabasemodelmightprovesomemingtoeasilymapplexobjectmodelstorelationaldat

3、abasemodels.OvervieappingandpersistenceframeapplainoldJavaobjectstorelationaldatabasetablesusingXMLconfigurationfiles.UsingHibernatecansavealotofdevelopmenttimeonaproject,sincetheanagedbytheframeeansthatyourapplication'sdataaccesslayeroftheunderlyingdatamodel.Hibernateha

4、sanumberofadvantagesoverothersimilarobject-relationalmappingapproaches(JDO,entitybeans,in-housedevelopment,andsoon):it'sfreeandopensource,ithasachievedagoodlevelofmaturity,it'sunit345678简谈Hibernate简化继承映射外文翻译导读：Hibernate简化继承映射外文翻译ebsite.CopythenecessaryHibernatelibraries(

5、JARfiles)toyourapplication'sCLASSPATH.2.CreatetheXMLconfigurationfilesthatapyourJavaobjectstoyourdatabasetables.(Lconfigurationfilestoyourapplicatioyforum.TointegrateHibernateintoanexistingJavaproject,you'llneedtoetheHibernateLconfigurationfilesthatapyourJavaobjectstoyou

6、rdatabasetables.(Lconfigurationfilestoyourapplication'sCLASSPATH.You'llnoticethatyoudon'thavetomodifyanyJavaobjectstosupporttheframeagine,forinstance,thatyouneededtosomehoingacolumn,forexample.Onceyou'dchangedthetable,allyou'dhavetodotoupdateyourJavaapplicationilarSQL.Fo

7、rthoseofyou.Butours345678简谈Hibernate简化继承映射外文翻译导读：Hibernate简化继承映射外文翻译HQLdiffersfromSQLinthatyoudon'todel(thatis,onyourtables,columns,etc.),butratheronyouJavaobjects,usingtheirpropertiesandrelationships.Listing1illustratesabasicexample.ThisHQLcoderetrievesallIndividualseis

8、;Johupportingexamplepletouse.YouiliarkeySQL,likeSELECT,FROM,andLconfigurationfilesThecoreofHibernate'sf