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Angular + Spring JPA + PostgreSQL example | Angular 4 Http Client - Spring Boot RestApi Server

Angular + Spring JPA + PostgreSQL example | Angular 4 Http Client - Spring Boot RestApi Server

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

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I. Technologies

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

II. Overview


1. Spring Boot Server


For more details about Spring JPA - PostgreSQL, please visit:
How to use Spring JPA with PostgreSQL | Spring Boot

2. Angular 4 Client


For more details:

III. Practice

1. Project Structure

1.1 Spring Boot Server


  • 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
  • Dependencies for Spring Boot and PostgreSQL in pom.xml

    1.2 Angular 4 Client


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.

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