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on December 01, 2020

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In this article, we will learn what is Repository pattern and how to implement the Repository pattern in Java with an example. Intent Repository layer is added between the domain and data mapping layers to isolate domain objects from details of the database access code and to minimize scattering and duplication of query code. The Repository pattern is especially useful in systems where a number of domain classes are large or heavy querying is utilized. Explanation Real-world example Let's say we need a persistent data store for persons. Adding new persons and searching for them according to different criteria must be easy. In plain words Repository architectural pattern creates a uniform layer of data repositories that can be used for CRUD operations. Repository Pattern Implementation In Java Example Let's first look at the Person class that we need to persist. @Entity public class Person { @Id @GeneratedValue private Long id; private Stri...

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ZonedDateTime class provide toLocalTime() API to convert from ZonedDateTime to LocalTime in Java.

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In this post, we would like to suggest a free Java project that is the simple School Management System developed using Core Java for learning purposes. So go ahead, check out the source code, and have a hands-on experience on real-time project. School Management System project is open-source and available on GitHub repository at https://github.com/sourcecodeexamples/School-Management-System .

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