Hibernate why use

Hibernate requires no special database tables or fields and generates much of the SQL at system initialization time instead of at runtime. Hibernate consistently offers superior performance over straight JDBC code, both in terms of developer productivity and runtime performance.

Hibernate was designed to work in an application server cluster and deliver a highly scalable architecture. Hibernate scales well in any environment: Use it to drive your in-house Intranet that serves hundreds of users or for mission-critical applications that serve hundreds of thousands.

Hibernate is well known for its excellent stability and quality, proven by the acceptance and use by tens of thousands of Java developers. Tools About. Hibernate ORM Your relational data.

Getting started. If you are not a robot then please try again. Hey Java Developer, Have you ever feel irritated by repeating the same lines of code over and over again in your application for fetching data from the database?

Are you struggling to map objects to your database tables? Is it difficult for you to implement oops with your JDBC code? Does it takes too much of rework while migrating from one database to another? Have you ever found it difficult to create associations between tables using JDBC? What is JDBC? JDBC Workflow. Source: avaldes. Opens a database connection Sends SQL queries to database using a JDBC driver JDBC driver connects to database Executes the queries to get the result set Sends the data to the application via the driver manager When results are returned, then it processes the data Finally, the connection is closed.

What is Hibernate? Source: J2eebrain. Hibernate Workflow. Source: Cloudsopedia. The results are mapped to objects based on the properties given in the Hibernate configuration XML file.

The database connection from an application is created using session which also helps in saving and retrieving the persistent object. Session factory is an interface which helps to create an instance of a session. There must be only one session factory per database. There will not be more than one session factory per MySQL alone.

Hibernate mainly solves the object-relational impedance mismatch problems which arise when a relational database is connected by an application written in object oriented programming language style. Object-relational impedance mismatch includes mismatches arises due to data type differences, manipulative differences, transactional differences, structural and integrity differences. Click here to see more details. Hibernate itself maps the Java classes to the database tables using XML configuration or by using annotations.

HQL understands object-oriented concepts like inheritance, polymorphism, and association. It is achieved by using a dialect to communicate with the database.

The database can be specified using dialect in the Hibernate configuration XML as follows. You need to fetch the first 10 entries of a table. List ; Thus your query statement need not change irrespective of the database you are using. Hibernate minimize the code changes when we add a new column in the database table. The changes to be done is given below. Modify the Hibernate XML mapping file to include the new column Thus database table changes can be easily implemented using Hibernate with less effort.

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