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loveprogramming viết ngày 21/04/2021

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:

Related Pages:

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

    kotlin-spring-boot-angular-6-httpclient-spring-rest-api-data-postgresql-database + angular-http-service-architecture

    1. Spring Boot Server

    kotlin-spring-boot-angular-6-httpclient-spring-rest-api-data-postgresql-database + spring-server-architecture

    2. Angular 6 Client

    kotlin-spring-boot-angular-6-httpclient-spring-rest-api-data-postgresql + angular-client-architecture

    III. Practice

    1. Project Structure

    1.1 Spring Boot Server

    Angular-6-HttpClient-Kotlin-SpringBoot-PostgreSQL+Kotlin-SpringBoot-project

  • 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

    kotlin-spring-boot-angular-6-httpclient-spring-rest-api-data-postgresql-database + angular-client-structure

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

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