Kotlin Spring JPA + Postgresql | Spring Boot Example

https://grokonez.com/kotlin/kotlin-spring-jpa-postgresql-spring-boot-example

Kotlin Spring JPA + Postgresql | Spring Boot Example

Spring JPA helps us improve our codes and reduce efforts for development and maintenance. It supports us the ways to write interface for repositories and custom finder methods, the implementation will be done automatically by Spring Framework. This Kotlin tutorial shows you how to create Kotlin Spring JPA application with PostgreSQL using Spring Boot.

Related posts:

I. Technology

– Java 1.8
– Maven 3.3.9
– Spring Tool Suite – Version 3.8.1.RELEASE
– Spring Boot: 1.5.6RELEASE

  • Kotlin 1.1.4

    II. Overview

    1. Goal

    spring-jpa-postgresql-goal

    2. Project Structure

    spring-jpa-postgresql-structure

  • Customer class corresponds to entity and table customer.

  • CustomerRepository is an interface extends CrudRepository, will be autowired in WebController for implementing repository methods and custom finder methods.

  • WebController is a REST Controller which has request mapping methods for RESTful requests such as: save, findall, findbyid, findbylastname.

  • Configuration for Spring Datasource and Spring JPA properties in application.properties

  • Dependencies for Spring Boot, PostgreSQL and Kotlin in pom.xml

    3. Step to do

    - Create Spring Boot project & add Dependencies
    - Configure Spring JPA
    - Create DataModel Class
    - Create Spring JPA Repository Interface
    - Create Web Controller

  • Create PostGreSQL table
    - Run & check Result

    III. Practice

    1. Create Spring Boot project & add Dependencies

    Open Spring Tool Suite, on Menu, choose File -> New -> Spring Starter Project, then fill each fields:
    kotlin springboot jpa postgresql - create project

Click Next and Finish, then our project will be created successfully.
Open pom.xml and add Dependencies:

More at:

https://grokonez.com/kotlin/kotlin-spring-jpa-postgresql-spring-boot-example

Kotlin Spring JPA + Postgresql | Spring Boot Example

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