Spring Boot 2.1 + Angular 8 + MySQL example | Angular HTTP Client + RestAPIs + Spring JPA CRUD + MySQL tutorial

In this tutorial, we show you Angular 8 Http Client & Spring Boot Server example that uses Spring JPA to do CRUD with MySQL and Angular 8 as a front-end technology to make HTTP request and receive response.

Technologies

– Java 8
– Maven 3.3.9
– Spring Tool Suite – Version 3.8.4.RELEASE
– Spring Boot: 2.1.3.RELEASE
– Angular 8
– RxJS 6

Video

Spring Boot + Angular 8 + MySQL example Overview

Spring Boot RestApis Server

spring-boot-angular-8-example-crud-mysql-spring-boot-server-architecture

Our Spring Boot Server can work with MySQL Database and provides APIs:

GET /customers/: get all customers
GET /customers/[id]: get a customer by id
GET /customers/age/[age]: find all customers by age
POST /customers/: save a customer
PUT /customers/[id]: update a customer by id
DELETE /customers/[id]: delete a customer by id
DELETE /customers/: delete all customers

Angular 8 Client

The image below shows overview about Angular Components that we will create:

Implement Spring Boot Server

Project Structure

– 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 MySQL in pom.xml

We will keep the tutorial as simple as possible, so for post with Spring JPA details, you can visit:
How to use Spring JPA MySQL | Spring Boot

Dependencies

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-data-jpa</artifactId>

</dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-web</artifactId>

</dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

<scope>runtime</scope>

</dependency>

Data Model

model/Customer.java

package com.grokonez.spring.restapi.mysql.model;

import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.Table;

@Entity

@Table(name = "customer")

public class Customer {

@Id

@GeneratedValue(strategy = GenerationType.AUTO)

private long id;

@Column(name = "name")

private String name;

@Column(name = "age")

private int age;

@Column(name = "active")

private boolean active;

public Customer() {

}

public Customer(String name, int age) {

this.name = name;

this.age = age;

this.active = false;

}

public long getId() {

return id;

}

public void setName(String name) {

this.name = name;

}

public String getName() {

return this.name;

}

public void setAge(int age) {

this.age = age;

}

public int getAge() {

return this.age;

}

public boolean isActive() {

return active;

}

public void setActive(boolean active) {

this.active = active;

}

@Override

public String toString() {

return "Customer [id=" + id + ", name=" + name + ", age=" + age + ", active=" + active + "]";

}

JPA Repository

repo/CustomerRepository.java

package com.grokonez.spring.restapi.mysql.repo;

import java.util.List;

import org.springframework.data.repository.CrudRepository;

import com.grokonez.spring.restapi.mysql.model.Customer;

public interface CustomerRepository extends CrudRepository<Customer, Long> {

List<Customer> findByAge(int age);

}

REST Controller

controller/CustomerController.java

package com.grokonez.spring.restapi.mysql.controller;

import java.util.ArrayList;

import java.util.List;

import java.util.Optional;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.http.HttpStatus;

import org.springframework.http.ResponseEntity;

import org.springframework.web.bind.annotation.CrossOrigin;

import org.springframework.web.bind.annotation.DeleteMapping;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.PostMapping;

import org.springframework.web.bind.annotation.PutMapping;

import org.springframework.web.bind.annotation.RequestBody;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

import com.grokonez.spring.restapi.mysql.model.Customer;

import com.grokonez.spring.restapi.mysql.repo.CustomerRepository;

@CrossOrigin(origins = "http://localhost:4200")

@RestController

@RequestMapping("/api")

public class CustomerController {

@Autowired

CustomerRepository repository;

@GetMapping("/customers")

public ResponseEntity<List<Customer>> getAllCustomers() {

List<Customer> customers = new ArrayList<>();

try {

repository.findAll().forEach(customers::add);

if (customers.isEmpty()) {

return new ResponseEntity<>(HttpStatus.NO_CONTENT);

}

return new ResponseEntity<>(customers, HttpStatus.OK);

} catch (Exception e) {

return new ResponseEntity<>(null, HttpStatus.INTERNAL_SERVER_ERROR);

}

@GetMapping("/customers/{id}")

public ResponseEntity<Customer> getCustomerById(@PathVariable("id") long id) {

Optional<Customer> customerData = repository.findById(id);

if (customerData.isPresent()) {

return new ResponseEntity<>(customerData.get(), HttpStatus.OK);

} else {

return new ResponseEntity<>(HttpStatus.NOT_FOUND);

}

@PostMapping(value = "/customers")

public ResponseEntity<Customer> postCustomer(@RequestBody Customer customer) {

try {

Customer _customer = repository.save(new Customer(customer.getName(), customer.getAge()));

return new ResponseEntity<>(_customer, HttpStatus.CREATED);

} catch (Exception e) {

return new ResponseEntity<>(null, HttpStatus.EXPECTATION_FAILED);

}

@DeleteMapping("/customers/{id}")

public ResponseEntity<HttpStatus> deleteCustomer(@PathVariable("id") long id) {

try {

repository.deleteById(id);

return new ResponseEntity<>(HttpStatus.NO_CONTENT);

} catch (Exception e) {

return new ResponseEntity<>(HttpStatus.EXPECTATION_FAILED);

}

@DeleteMapping("/customers")

public ResponseEntity<HttpStatus> deleteAllCustomers() {

try {

repository.deleteAll();

return new ResponseEntity<>(HttpStatus.NO_CONTENT);

} catch (Exception e) {

return new ResponseEntity<>(HttpStatus.EXPECTATION_FAILED);

}

@GetMapping(value = "customers/age/{age}")

public ResponseEntity<List<Customer>> findByAge(@PathVariable int age) {

try {

List<Customer> customers = repository.findByAge(age);

if (customers.isEmpty()) {

return new ResponseEntity<>(HttpStatus.NO_CONTENT);

}

return new ResponseEntity<>(customers, HttpStatus.OK);

} catch (Exception e) {

return new ResponseEntity<>(HttpStatus.EXPECTATION_FAILED);

}

@PutMapping("/customers/{id}")

public ResponseEntity<Customer> updateCustomer(@PathVariable("id") long id, @RequestBody Customer customer) {

Optional<Customer> customerData = repository.findById(id);

if (customerData.isPresent()) {

Customer _customer = customerData.get();

_customer.setName(customer.getName());

_customer.setAge(customer.getAge());

_customer.setActive(customer.isActive());

return new ResponseEntity<>(repository.save(_customer), HttpStatus.OK);

} else {

return new ResponseEntity<>(HttpStatus.NOT_FOUND);

}

Configuration for Spring Datasource & JPA properties

application.properties

spring.datasource.url=jdbc:mysql://localhost:3306/testdb?useSSL=false

spring.datasource.username=root

spring.datasource.password=123456

spring.jpa.generate-ddl=true

Implement Angular 8 HTTP Client

Project Structure

We have:
– 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
– app-routing.module.ts: Routing configuration

Create Service & Components

On Project folder, run commands below:
– ng g s customer
– ng g c create-customer
– ng g c customer-details
– ng g c customers-list
– ng g c search-customers

App Module

app.module.ts

import { BrowserModule } from '@angular/platform-browser';

import { NgModule } from '@angular/core';

import { FormsModule } from '@angular/forms';

import { HttpClientModule } from '@angular/common/http';

import { AppRoutingModule } from './app-routing.module';

import { AppComponent } from './app.component';

import { CreateCustomerComponent } from './create-customer/create-customer.component';

import { CustomerDetailsComponent } from './customer-details/customer-details.component';

import { CustomersListComponent } from './customers-list/customers-list.component';

import { SearchCustomersComponent } from './search-customers/search-customers.component';

@NgModule({

declarations: [

AppComponent,

CreateCustomerComponent,

CustomerDetailsComponent,

CustomersListComponent,

SearchCustomersComponent

imports: [

BrowserModule,

AppRoutingModule,

FormsModule,

HttpClientModule

providers: [],

bootstrap: [AppComponent]

})

export class AppModule { }

Add Router

app-routing.module.ts

import { NgModule } from '@angular/core';

import { Routes, RouterModule } from '@angular/router';

import { CustomersListComponent } from './customers-list/customers-list.component';

import { CreateCustomerComponent } from './create-customer/create-customer.component';

import { SearchCustomersComponent } from './search-customers/search-customers.component';

const routes: Routes = [

{ path: '', redirectTo: 'customer', pathMatch: 'full' },

{ path: 'customer', component: CustomersListComponent },

{ path: 'add', component: CreateCustomerComponent },

{ path: 'findbyage', component: SearchCustomersComponent },

];

@NgModule({

imports: [RouterModule.forRoot(routes)],

exports: [RouterModule]

})

export class AppRoutingModule { }

AppComponent HTML for routing:
app.component.html

<h1 style="color: blue">grokonez.com</h1>

<h3>{{title}}</h3>

<nav>

<a routerLink="customer" class="btn btn-primary active" role="button" routerLinkActive="active">Customers</a>

<a routerLink="findbyage" class="btn btn-primary active" role="button" routerLinkActive="active">Search</a>

</nav>

<router-outlet></router-outlet>

</div>

Data Model

Create new file named customer.ts:

export class Customer {

id: number;

name: string;

age: number;

active: boolean;

}

Data Service

customer.service.ts

import { Injectable } from '@angular/core';

import { HttpClient } from '@angular/common/http';

import { Observable } from 'rxjs';

@Injectable({

providedIn: 'root'

})

export class CustomerService {

private baseUrl = 'http://localhost:8080/api/customers';

constructor(private http: HttpClient) { }

getCustomer(id: number): Observable<any> {

return this.http.get(`${this.baseUrl}/${id}`);

}

createCustomer(customer: any): Observable<any> {

return this.http.post(this.baseUrl, customer);

}

updateCustomer(id: number, value: any): Observable<any> {

return this.http.put(`${this.baseUrl}/${id}`, value);

}

deleteCustomer(id: number): Observable<any> {

return this.http.delete(`${this.baseUrl}/${id}`);

}

getCustomersList(): Observable<any> {

return this.http.get(this.baseUrl);

}

getCustomersByAge(age: number): Observable<any> {

return this.http.get(`${this.baseUrl}/age/${age}`);

}

deleteAll(): Observable<any> {

return this.http.delete(this.baseUrl);

}

Components

List of Customers

customers-list/customers-list.component.ts

import { Component, OnInit } from '@angular/core';

import { Observable } from 'rxjs';

import { CustomerService } from '../customer.service';

import { Customer } from '../customer';

@Component({

selector: 'app-customers-list',

templateUrl: './customers-list.component.html',

styleUrls: ['./customers-list.component.css']

})

export class CustomersListComponent implements OnInit {

customers: Observable<Customer[]>;

constructor(private customerService: CustomerService) { }

ngOnInit() {

this.reloadData();

}

deleteCustomers() {

this.customerService.deleteAll()

.subscribe(

data => {

console.log(data);

this.reloadData();

error => console.log('ERROR: ' + error));

}

reloadData() {

this.customers = this.customerService.getCustomersList();

}

customers-list/customers-list.component.html

<h3>Customers</h3>

<app-customer-details [customer]='customer'></app-customer-details>

</div>

<div>

<button type="button" class="button btn-danger" (click)='deleteCustomers()'>Delete All</button>

</div>

Customer Details

customer-details/customer-details.component.ts

import { Component, OnInit, Input } from '@angular/core';

import { CustomerService } from '../customer.service';

import { Customer } from '../customer';

import { CustomersListComponent } from '../customers-list/customers-list.component';

@Component({

selector: 'app-customer-details',

templateUrl: './customer-details.component.html',

styleUrls: ['./customer-details.component.css']

})

export class CustomerDetailsComponent implements OnInit {

@Input() customer: Customer;

constructor(private customerService: CustomerService, private listComponent: CustomersListComponent) { }

ngOnInit() {

}

updateActive(isActive: boolean) {

this.customerService.updateCustomer(this.customer.id,

{ name: this.customer.name, age: this.customer.age, active: isActive })

.subscribe(

data => {

console.log(data);

this.customer = data as Customer;

error => console.log(error));

}

deleteCustomer() {

this.customerService.deleteCustomer(this.customer.id)

.subscribe(

data => {

console.log(data);

this.listComponent.reloadData();

error => console.log(error));

}

customer-details/customer-details.component.html

<div>

<label>Name: </label> {{customer.name}}

</div>

<div>

<label>Age: </label> {{customer.age}}

</div>

<div>

<label>Active: </label> {{customer.active}}

</div>

<span class="button is-small btn-primary" *ngIf='customer.active' (click)='updateActive(false)'>Inactive</span>

<span class="button is-small btn-primary" *ngIf='!customer.active' (click)='updateActive(true)'>Active</span>

<span class="button is-small btn-danger" (click)='deleteCustomer()'>Delete</span>

<hr />

</div>

Create Customer

create-customer/create-customer.component.ts

import { Component, OnInit } from '@angular/core';

import { Customer } from '../customer';

import { CustomerService } from '../customer.service';

@Component({

selector: 'app-create-customer',

templateUrl: './create-customer.component.html',

styleUrls: ['./create-customer.component.css']

})

export class CreateCustomerComponent implements OnInit {

customer: Customer = new Customer();

submitted = false;

constructor(private customerService: CustomerService) { }

ngOnInit() {

}

newCustomer(): void {

this.submitted = false;

this.customer = new Customer();

}

save() {

this.customerService.createCustomer(this.customer)

.subscribe(

data => {

console.log(data);

this.submitted = true;

error => console.log(error));

this.customer = new Customer();

}

onSubmit() {

this.save();

}

create-customer/create-customer.component.html

<h3>Create Customer</h3>

</div>

</div>

<button type="submit" class="btn btn-success">Submit</button>

</form>

</div>

<h4>You submitted successfully!</h4>

</div>

Search Customers

search-customers/search-customers.component.ts

import { Component, OnInit } from '@angular/core';

import { Customer } from '../customer';

import { CustomerService } from '../customer.service';

@Component({

selector: 'app-search-customers',

templateUrl: './search-customers.component.html',

styleUrls: ['./search-customers.component.css']

})

export class SearchCustomersComponent implements OnInit {

age: number;

customers: Customer[];

constructor(private dataService: CustomerService) { }

ngOnInit() {

this.age = 0;

}

private searchCustomers() {

this.customers = [];

this.dataService.getCustomersByAge(this.age)

.subscribe(customers => this.customers = customers);

}

onSubmit() {

this.searchCustomers();

}

search-customers/search-customers.component.html

</div>

<button type="submit" class="btn btn-success">Submit</button>

</div>

</form>

</div>

<ul>

<h4>{{customer.id}} - {{customer.name}} {{customer.age}}</h4>

</li>

</ul>

Run & Check Results

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

– Open browser for url http://localhost:4200/

Add Customer:

Show Customers:

Click on Active button to update Customer status:

spring-boot-angular-8-example-crud-mysql-update-customers

Search Customers by Age:

spring-boot-angular-8-example-crud-mysql-search-customers

Delete a Customer:

spring-boot-angular-8-example-crud-mysql-delete-customer

Delete All Customers:

Source Code

– server-SpringBootRestApiMySQL
– client-Angular8SpringBoot

By grokonez | February 25, 2019.

Last updated on February 7, 2020.

5 thoughts on “Spring Boot 2.1 + Angular 8 + MySQL example | Angular HTTP Client + RestAPIs + Spring JPA CRUD + MySQL tutorial”

Vincent says:
June 4, 2019 at 3:09 pm
Can you please include your .css styles? Without the styles, the page looks ugly.
1. grokonez says:
  June 5, 2019 at 1:39 am
  Hi Vicent, it’s bootstrap, inside index.html file (source code). 🙂
Craig Liston says:
June 22, 2019 at 6:52 am
Hi, I’m new to angular and spring. I have a background in jsp and java. When creating the client and server is it better to split the two into to project or can you put them both under one?
I had started one and made them both under the same project then I found this example to for how to hook into database and noticed you have them separate.
BTW based on the example here I will be definitely be visiting your site more often.
julien says:
July 24, 2019 at 2:48 pm
Hello,in my application.properties all my spring.datasource… are unused property and i have a java.sql.SQLSyntaxErrorException: Unknown database ‘testdb’
it’s a problem with my sql connection? Thanks.Julien
ShanukJ says:
November 22, 2019 at 3:21 pm
Thank you for the great tutorial. I have a question, If I use abstract class for model how can I handle controller and other stuff?

Spring Boot 2.1 + Angular 8 + MySQL example | Angular HTTP Client + RestAPIs + Spring JPA CRUD + MySQL tutorial

Technologies

Video

Spring Boot + Angular 8 + MySQL example Overview

Spring Boot RestApis Server

Angular 8 Client

Implement Spring Boot Server

Project Structure

Dependencies

Data Model

JPA Repository

REST Controller

Configuration for Spring Datasource & JPA properties

Implement Angular 8 HTTP Client

Project Structure

Create Service & Components

App Module

Add Router

Data Model

Data Service

Components

List of Customers

Customer Details

Create Customer

Search Customers

Run & Check Results

Source Code

Post Tags

5 thoughts on “Spring Boot 2.1 + Angular 8 + MySQL example | Angular HTTP Client + RestAPIs + Spring JPA CRUD + MySQL tutorial”

Got Something To Say: Cancel reply

Technologies

Video

Spring Boot + Angular 8 + MySQL example Overview

Spring Boot RestApis Server

Angular 8 Client

Implement Spring Boot Server

Project Structure

Dependencies

Data Model

JPA Repository

REST Controller

Configuration for Spring Datasource & JPA properties

Implement Angular 8 HTTP Client

Project Structure

Create Service & Components

App Module

Add Router

Data Model

Data Service

Components

List of Customers

Customer Details

Create Customer

Search Customers

Run & Check Results

Source Code

Related Posts

Post Tags

5 thoughts on “Spring Boot 2.1 + Angular 8 + MySQL example | Angular HTTP Client + RestAPIs + Spring JPA CRUD + MySQL tutorial”

Got Something To Say: Cancel reply