https://grokonez.com/spring-framework/spring-boot/kotlin-spring-boot/kotlin-spring-boot-angular-6-crud-postgresql-example-spring-data-jpa-rest-apis-example

Kotlin Spring Boot + Angular 6 CRUD + PostgreSQL example | Spring Data JPA + REST APIs example

In this tutorial, we show you Angular 6 Http Client & Spring Boot Server example that uses Spring JPA to do CRUD with PostgreSQL and Angular 6 as a front-end technology to make request and receive response.

Related Posts:

• How to use Spring JPA with PostgreSQL | Spring Boot
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• Kotlin Spring JPA + Postgresql | Spring Boot Example
• Kotlin RequestMapping RESTful APIs with @GetMapping, @PostMapping, @PutMapping, @DeleteMapping
• Kotlin SpringJPA Hibernate One-To-Many relationship

Related Pages:

• Kotlin
• Angular
• SpringBoot

I. Technologies

– Java 1.8 – Maven 3.3.9 – Spring Tool Suite – Version 3.8.4.RELEASE – Spring Boot: 2.0.3.RELEASE – Angular 6 - RxJS 6

II. Overview

1. Spring Boot Server

2. Angular 6 Client

III. Practice

1. Project Structure

1.1 Spring Boot Server

• Customer class corresponds to entity and table customer.
• CustomerRepository is an interface extends CrudRepository, will be autowired in CustomerController for implementing repository methods and custom finder methods.
• CustomerController is a REST Controller which has request mapping methods for RESTful requests such as: getAllCustomers, postCustomer, deleteCustomer, deleteAllCustomers, findByAge, updateCustomer.
• Configuration for Spring Datasource and Spring JPA properties in application.properties
• Dependencies for Spring Boot and PostgreSQL in pom.xml

1.2 Angular 6 Client

In this example, we focus on:

• 4 components: customers-list, customer-details, create-customer, search-customer.
• 3 modules: FormsModule, HttpClientModule, AppRoutingModule.
• customer.ts: class Customer (id, firstName, lastName)
• customer.service.ts: Service for Http Client methods

2. How to do

2.1 Kotlin Spring Boot Server

2.1.1 Dependency

<dependency>
	<groupId>org.jetbrains.kotlin</groupId>
	<artifactId>kotlin-stdlib-jdk8</artifactId>
</dependency>
<dependency>
	<groupId>org.jetbrains.kotlin</groupId>
	<artifactId>kotlin-reflect</artifactId>
</dependency>
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-web</artifactId>

</dependency>
<dependency>

<groupId>org.postgresql</groupId>

<artifactId>postgresql</artifactId>

<scope>runtime</scope>

</dependency>

2.1.2 Customer - Data Model

model/Customer.java

https://grokonez.com/spring-framework/spring-boot/kotlin-spring-boot/kotlin-spring-boot-angular-6-crud-postgresql-example-spring-data-jpa-rest-apis-example

Kotlin Spring Boot + Angular 6 CRUD + PostgreSQL example | Spring Data JPA + REST APIs example

#kotlin #springboot #springjpa #angular6 #postgresql