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Hibernate 面试题与答案

Test your skills through the online practice test: Hibernate Quiz Online Practice Test

问题 31. How do you invoke Stored Procedures?

<sql-query name="selectAllEmployees_SP" callable="true">
<return alias="emp" class="employee">
<return-property name="empid" column="EMP_ID"/>
<return-property name="name" column="EMP_NAME"/>
<return-property name="address" column="EMP_ADDRESS"/> { ? = call selectAllEmployees() }
</return>
</sql-query>

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问题 32. Explain Criteria API?

Criteria is a simplified API for retrieving entities by composing Criterion objects. This is a very convenient approach for functionality like "search" screens where there is a variable number of conditions to be placed upon the result set.
Example :
List employees = session.createCriteria(Employee.class) .add(Restrictions.like("name", "a%") ) .add(Restrictions.like("address", "Boston")) .addOrder(Order.asc("name") ) .list();

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问题 33. Define HibernateTemplate?

org.springframework.orm.hibernate.HibernateTemplate is a helper class which provides different methods for querying/retrieving data from the database. It also converts checked HibernateExceptions into unchecked DataAccessExceptions.

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问题 34. What are the benefits does HibernateTemplate provide?

The benefits of HibernateTemplate are :
* HibernateTemplate, a Spring Template class simplifies interactions with Hibernate Session.
* Common functions are simplified to single method calls.
* Sessions are automatically closed.
* Exceptions are automatically caught and converted to runtime exceptions.

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问题 35. How do you switch between relational databases without code changes?

Using Hibernate SQL Dialects, we can switch databases. Hibernate will generate appropriate hql queries based on the dialect defined.

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Hibernate 面试题与答案

相关差异对比

问题 31. How do you invoke Stored Procedures?

问题 32. Explain Criteria API?

问题 33. Define HibernateTemplate?

问题 34. What are the benefits does HibernateTemplate provide?

问题 35. How do you switch between relational databases without code changes?

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