[Spring] JPA, Repository

March 31, 2018 | 0 Minute Read

This post is focused on my Spring study

JPA

• Standard F/W of Java ORM
• Mapping RDB as a instance

JDBC –> Infinite loop in sql query required, infinite loop for Connections(open & close) Mybatis –> Infinite loop in sql query required, delegation for Connections(open & close) JPA –> automata for sql query, delegation for Connections(open & close)

Relationship with Hibernate

• IF JPA is Dance then –> Hibernate is a dancer.
• JPA is a one of APIs and it follows Java Platform RDMS.
• Hibernate is a ORM library and it follows JPA Spec

Repository

Description

1. Product class provides Getter and Setter
2. ProductRepository is extended with JPARepository<Product, String>
3. real methods perform in RepositoryApplication
4. extra setting is required(ex. H2 DB) in application.properties