Angular 4 + Spring JPA + MySQL example | Angular 4 Http Client – Spring Boot RestApi Server

In this tutorial, JavaSampleApproach shows you Angular 4 Http Client & Spring Boot Server example that uses Spring JPA to interact with MySQL and Angular 4 as a front-end technology to make request and receive response.

Related Posts:
How to use Spring JPA MySQL | Spring Boot
Spring JPA + MySQL + AngularJS example | Spring Boot
How to use Angular Http Client to fetch Data from SpringBoot RestAPI – Angular 4
How to use Angular HttpClient to POST, PUT, DELETE data on SpringBoot Rest APIs – Angular 4

I. Technologies

– Java 1.8
– Maven 3.3.9
– Spring Tool Suite – Version 3.8.4.RELEASE
– Spring Boot: RELEASE
– Angular 4

II. Overview

angular-http-service-architecture

1. Spring Boot Server

angular-4-spring-jpa-mysql-spring-boot-architecture

For more details about Spring JPA – MySQL, please visit:
How to use Spring JPA MySQL | Spring Boot

2. Angular 4 Client

angular-4-spring-jpa-postgresql-angular-architecture

For more details:
– About Angular 4 Routing:
How to work with Angular Routing – Spring Boot + Angular 4
– About Angular Http Client to GET/POST/DELETE:
+ How to use Angular Http Client to fetch Data from SpringBoot RestAPI – Angular 4
+ How to use Angular HttpClient to POST, PUT, DELETE data on SpringBoot Rest APIs – Angular 4

III. Practice

1. Project Structure

1.1 Spring Boot Server

angular-4-spring-jpa-mysql-spring-boot-structure

– Class Customer corresponds to entity and table customer, it should be implemented Serializable.
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: getAll, postCustomer, delete, findByLastName.
– Configuration for Spring Datasource and Spring JPA properties in application.properties
Dependencies for Spring Boot and MySQL in pom.xml

1.2 Angular 4 Client

angular-4-spring-jpa-postgresql-angular-structure

In this example, we focus on:
– 4 components: customers, customer-details, create-customer, search-customer.
– 3 modules: FormsModule, HttpModule, AppRoutingModule.
customer.ts: class Customer (id, firstName, lastName)
data.service.ts: DataService for Http Client methods
proxy.conf.json for integrating Angular Client with Spring Boot Server.

2. How to do

2.1 Spring Boot Server
2.1.1 Dependency

2.1.2 Customer – Data Model

2.1.3 JPA Repository

2.1.4 REST Controller

2.1.5 Configuration for Spring Datasource & JPA properties

2.2 Angular 4 Client
2.2.0 Model

2.2.1 DataService

2.2.2 Components

– CustomersComponent:

– CustomerDetailsComponent:

– CreateCustomerComponent:

– SearchCustomersComponent:

2.2.3 AppRoutingModule

And AppComponent HTML for routing:

2.2.4 AppModule

2.2.5 Integrate Angular Client with Spring Boot Server

– Add proxy.conf.json to root folder of the project:

– Edit package.json file for “start” script:

3. Run & Check Result

Build and Run Spring Boot project with commandlines: mvn clean install and mvn spring-boot:run.
– Run the Angular App with command: npm start.

– Open browser for url http://localhost:4200/:
Add Customer:
angular-4-spring-jpa-postgresql-result-add-customer

Show Customers & click on any Customer:
angular-4-spring-jpa-mysql-result-show-customers

>> MySQL DB:
angular-4-spring-jpa-mysql-result-mysql-db

Search Customer:
angular-4-spring-jpa-mysql-result-search-customers

Go back to ShowCustomers, chose a Customer and click on Delete Customer:
angular-4-spring-jpa-mysql-result-delete-customer

>> MySQL DB after deleting:
angular-4-spring-jpa-mysql-result-mysql-db-after-delete

IV. Source Code

SpringJPAMySQLAngular4
Angular4Client


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