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Introduction to Hibernate in Java


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Introduction to Hibernate in Java

 

·         Hibernate is open source light weight ORM (Object Relational Mapping) tool

·         It is a powerful, ultra –high performance object/relational persistence and query service for Java

·         It simplifies the development of java application to interact with database.

·         It lets us develop persistent objects following common Java idioms – including association, inheritance, polymorphism, composition and the Java collections framework

·         It internally uses the JDBC API to interact with the database.

·         Hibernate Query language is designed as a “minimal” object oriented extension to SQL, provide an elegant bridge between the object and relational worlds.

 

What make up a Hibernate application?

·         Standard domain object defined in Java as POJO’s nothing more.

·         Hibernate mapping file

·         Hibernate configuration file

·         Hibernate Runtime

·         Database

 

Why use Hibernate?

·         Simple to get up and running

·         Transparent Persistence achieved using Reflection

·         Isn’t intrusive to the build/deploy process

·         Persistence objects can follow common OOPS principles.

·         In most cases Java object do not even know they can be persistence

·         Java developers can focus on object model

·         Feel much more natural than Entity Beans or JDBC coding

·         Query mechanism closely resembles SQL so learning curve is low


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