The Java Persistence API, sometimes referred to as JPA, is a Java programming language framework that allows developers to manage relational data in applications using Java Platform, Standard Edition and Java Platform, Enterprise Edition.
The Java Persistence API originated as part of the work of the JSR 220 Expert Group.
Persistence in this context covers three areas:
A persistence entity is a lightweight Java class that typically represents a t...
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The Java Persistence API, sometimes referred to as JPA, is a Java programming language framework that allows developers to manage relational data in applications using Java Platform, Standard Edition and Java Platform, Enterprise Edition.
The Java Persistence API originated as part of the work of the JSR 220 Expert Group.
Persistence in this context covers three areas:
A persistence entity is a lightweight Java class that typically represents a table in a relational database. Instances of such an entity correspond to individual rows in the table. Entities typically have relationships with other entities, and these relationships are expressed through object/relational metadata. Object/relational metadata can be specified directly in the entity class file by using annotations, or in a separate XML descriptor file distributed with the application.
The Java Persistence Query Language (JPQL) makes queries against entities stored in a relational database. Queries resemble SQL queries in...
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