Angular SpringBoot CRUD MySQL Example

#angular #mysql #springboot #crud

Angular SpringBoot CRUD MySQL Example

https://loizenai.com/angular-springboot-crud-mysql-example/

In the tutorial, I introduce how to create an “SpringBoot Angular MySQL CRUD Example” with POST/GET/PUT/DELETE requests to SpringBoot RestAPIs.

– Design overview system by Architecture Diagram that includes: Angular Client, SpringBoot RestAPIs, and MySQL database.
– Implement Angular CRUD Client with Angular built-in HttpClient to communicate with server side.
– Implement SpringBoot RestAPIs that gets data from MySQL using Spring Data JPA and returns back data as Json format to requested Angular Client.

Overall Angular SpringBoot MySQL CRUD Architecture Application

We build backend SpringBoot Application that provides RestAPIs for POST/GET/PUT/DELETE Customer entities and store them in MySQL/PostgreSQL database.
We implement Angular Application that use Angular HTTPClient to interact (call/receive requests) with SpringBoot backend and display corresponding page view in browser.

Overview SpringBoot CRUD MySQL Backend Architecture

For building RestAPIs in SpringBoot application, we use Spring MVC Web.
For interacting with database MySQL/PostgreSQL, we use Spring JPA.
We implement RestAPI’s URL in RestAPIController.java file to process bussiness logic.
For manipulating database’s records, we define a JPA model for mapping field data and use a JPA CRUD repository to do CRUD operation with MySQL/PostgreSQL.

– SpringBoot Project Structure

models package defines Customer model and Message response class.
repository package defines Spring JPA repository class CustomerRepository to do CRUD operation with database.
service package defines a middleware class CustomerServices between Controller and Repository.
controller package defines a RestAPI Controller RestAPIController to handle POST/GET/PUT/DELETE request.

Overview Angular CRUD Architecture Design

Angular CRUD Application is designed with 3 main layers:

Service Layer is used to define Angular Common Services and HttpClient Services to interact with RestAPIs
Component Layer is used to define Angular Components to show views in Browser for interacting with Users
Router Layer is used to route URLs mapping with the corresponding Angular Components

Angular CRUD Application defines 3 components, 2 services, 1 routers, and 2 data models:

– Components:

add-customer component is used to add a new customer to system
list-customer component is used to show all customers on view pages, delete a customer and update a customer
message component is used to define a view to show logging message on browser

– Services:

customer.service.ts defines POST/GET/PUT/DELETE HTTP requests to SpringBoot RestAPIs with the built-in Angular HttpClient.
message.service.ts defines an array storage to log all messages when Angular CRUD App running

– Router: app-routing.module.ts defines how to map a corresponding Angular component with an URL.

– Models:

customer.ts defines the main data model of our application.
message.ts defines the response data model between SpringBoot and Angular application.