常見(jiàn)hibernate面試題1.Hibernate有哪幾種查詢數(shù)據(jù)的方式

hibernateHibernate(1)(2)OID(5)load()get()loadJavaUsersuser=(Users)session.load(Users.class,userId);Usersuser=(Users)session.load(Users.class,getJavaUsersuser=(Users)session.get(Users.class,userId);Usersuser=(Users)session.get(Users.class,1：userIdget的是一個(gè)null；如果通過(guò)load加載，則返回一個(gè)對(duì)象，如果后面代碼如user（user.getPassword()）會(huì)拋出異常：2：load，getJavaUsersuser=(Users)session.load(Users.class,userId);Usersuser=(Users)session.load(Users.class,JavaUsersuser=(Users)session.get(Users.class,userId);Usersuser=(Users)session.get(Users.class,Usersuser=(Users)session.load(Users.class,userId)sql。JavaUsersuser=(Users)session.load(Users.class,userId);Usersuser=(Users)session.load(Users.class,userId);2loadhibernatemapmapkeyuserIdgetId()mapkey對(duì)JDBC數(shù)據(jù)庫(kù)的代碼做了封裝，大大簡(jiǎn)化了數(shù)據(jù)層繁瑣的重復(fù)性HibernateJDBCORMDAOhibernateJavaHibernateHibernate2：a)b)Hibernate3HibernateHibernateHibernate條件：數(shù)據(jù)不會(huì)被第修改、數(shù)據(jù)大小在可接受范圍、數(shù)據(jù)更新頻率低、同 第緩存的實(shí)HibernateSql、Criteria,objectcomptosition1 屬性查2 參數(shù)查詢、命名參數(shù)查3 關(guān)聯(lián)查4 分頁(yè)查5 統(tǒng)計(jì)函使向一對(duì)多關(guān)聯(lián)，不使用單向一對(duì)Bag,=====================HibernateSessionFactory？（多選SessionFactory一個(gè)SessionFactory對(duì)象對(duì)應(yīng)一個(gè)數(shù)據(jù)庫(kù)源據(jù)庫(kù)源，只需要?jiǎng)?chuàng)建一個(gè)。SessionFactoryload()CustomerSetordersOrderCustomer.hbm.xmlorders<set>B)<one-to-many>C)<many-to-one><set>元素有一個(gè)cascade屬性，如果希望Hibernate級(jí)存集合中的對(duì)象，casecade？（單選）D)save-Session以下程序的打印結(jié)果是什么？（單選tx=Customerc1=(Customer)session.load(Customer.class,newLong(1));Customerc2=(Customer)session.load(Customer.class,newLong(1));Customernametx=Customernew執(zhí)行以上程序，Hibernateupdate？（單選0B)1C)2Customercustomer=newCustomer();//line1customer.setName(\"Tom\");//line2Sessionsession1=sessionFactory.openSession();//line3Transactiontx1=session1.beginTransaction();//line4session1.save(customer);//line4mit();//line5session1.close();A)line1B)line2C)line3D)line4E)line5Customercustomer=newCustomer();//line1customer.setName(\"Tom\");//line2Sessionsession1=sessionFactory.openSession();//line3Transactiontx1=session1.beginTransaction();//line4session1.save(customer);//line4mit();//line5session1.close();A)line1B)line2C)line3D)line4E)line5以下哪一種檢索策略利用了外連結(jié)查詢？（單選立即檢索B)延遲檢索C)CustomerordersSessionsession=sessionFactory.openSession();tx=session.beginTransaction();Customercustomer=(Customer)session.get(Customer.class,newLong(1)); tor A)編譯出錯(cuò)B)編譯通過(guò)，并正常運(yùn)行C)HQLSQL，以下哪些說(shuō)法正確？（多選HQLSQLHQL面向?qū)ο?，而SQL關(guān)系數(shù)據(jù)HQLSQLselect,insert,update,deleteHQLinsert,updatedelete事務(wù)級(jí)別是由誰(shuí)實(shí)現(xiàn)的？（單選JavaB)Hibernate