Angular SpringBoot CRUD  Microsoft SQL Server Example
Tags: angular, springboot, mssql, crud
Published: 2021-05-13 17:39:45

https://loizenai.com/angular-springboot-crud-mssql/

Tutorial: "Angular SpringBoot CRUD  Microsoft SQL Server Example"

In the tutorial, I introduce how to create an "SpringBoot Angular  Microsoft SQL Server CRUD Example" with POST/GET/PUT/DELETE requests to SpringBoot RestAPIs.

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

You can check out the complete code of the application on this <a href="https://loizenai.com/angular-11-springboot-crud-mysql-example/#sourcecode-angular-springboot">github repository</a>.

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<h2 id="overal-architecture-application-example">Overall Angular SpringBoot  Microsoft SQL Server CRUD Architecture Application</h2>
[caption id="attachment_4985" align="alignnone" width="588"]<img src="https://loizenai.com/wp-content/uploads/2020/12/Overall-Architecture-Angular-CRUD-Application-with-SpringBoot-Fullstack-Example.png" alt="Overall-Architecture-Angular-CRUD-Application-with-SpringBoot-Fullstack-Example" width="588" height="481" class="size-full wp-image-4985" /> Overall-Architecture-Angular-CRUD-Application-with-SpringBoot-Fullstack-Example[/caption]

<ul>
<li>We build backend SpringBoot Application that provides RestAPIs for POST/GET/PUT/DELETE Customer entities and store them in  Microsoft SQL Server/PostgreSQL database.</li>
<li>We implement Angular Application that use Angular HTTPClient to interact (call/receive requests) with SpringBoot backend and display corresponding page view in browser.</li>
</ul>
<h2 id="overview-springboot-backend-architecture">Overview SpringBoot CRUD  Microsoft SQL Server Backend Architecture</h2>
[caption id="attachment_4986" align="alignnone" width="692"]<img src="https://loizenai.com/wp-content/uploads/2021/05/SpringBoot-RestAPIs-Backend-Architecture-Design.png" alt="SpringBoot-RestAPIs-Backend-Architecture-Design" width="692" height="500" class="size-full wp-image-4986" /> SpringBoot-RestAPIs-Backend-Architecture-Design[/caption]

<ul>
<li>For building RestAPIs in SpringBoot application, we use Spring MVC Web.</li>
<li>For interacting with database  Microsoft SQL Server/PostgreSQL, we use Spring JPA.</li>
<li>We implement RestAPI’s URL in RestAPIController.java file to process bussiness logic.</li>
<li>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  Microsoft SQL Server/PostgreSQL.</li>
</ul>

- SpringBoot Project Structure

[caption id="attachment_1075" align="alignnone" width="549"]<img src="https://loizenai.com/wp-content/uploads/2020/06/SpringBoot-Backend-Project-Structure.png" alt="Angular SpringBoot CRUD  Microsoft SQL Server Example - SpringBoot RestAPI Backend Project Structure" width="549" height="252" class="size-full wp-image-1075" /> SpringBoot Backend Project Structure[/caption]

<ul>
<li><code>models</code> package defines <code>Customer</code> model and <code>Message</code> response class.</li>
<li><code>repository</code> package defines Spring JPA repository class <code>CustomerRepository</code> to do CRUD operation with database.</li>
<li><code>service</code> package defines a middleware class <code>CustomerServices</code> between Controller and Repository.</li>
<li><code>controller</code> package defines a RestAPI Controller <code>RestAPIController</code> to handle POST/GET/PUT/DELETE request.</li>
</ul>
<h2 id="overview-angular-crud-application-design">Overview Angular CRUD Architecture Design - Angular SpringBoot CRUD  Microsoft SQL Server RestAPI</h2>
[caption id="attachment_1079" align="alignnone" width="647"]<img src="https://loizenai.com/wp-content/uploads/2020/06/Angular-CRUD-Application-Frontend-Design-Architecture.png" alt="Angular CRUD Application - Frontend Design Architecture" width="647" height="532" class="size-full wp-image-1079" /> Angular CRUD Application - Frontend Design Architecture[/caption]

Angular CRUD Application is designed with 3 main layers:

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

Angular Project Structure:

[caption id="attachment_1085" align="alignnone" width="796"]<img src="https://loizenai.com/wp-content/uploads/2020/06/Angular-CRUD-Application-Project-Structure-1.png" alt="Angular SpringBoot CRUD  Microsoft SQL Server Example - Angular CRUD Application - Project Structure" width="796" height="456" class="size-full wp-image-1085" /> Angular CRUD Application - Project Structure[/caption]

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

- Components:

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

- Services:

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

- Router: <code>app-routing.module.ts</code> defines how to map a corresponding Angular component with an URL.

More at:

https://loizenai.com/angular-springboot-crud-mssql/

Tutorial: "Angular SpringBoot CRUD  Microsoft SQL Server Example"