Build full-stack applications using Java frameworks and front-end frameworks

Building a full-stack application involves back-end and front-end development, which can be achieved using Java framework (Spring Boot) and front-end framework (Angular). Backend (Java): Create a Spring Boot project and add the Spring Boot Starter Web dependency. Create a controller class to handle the request (such as HomeController). Front-end (Angular): Create an Angular project. Create a component class to display data (such as HomeComponent). Connect the backend and frontend: Configure the API path in the Spring Boot configuration file. Update request path in Angular service. Practical case: TODO application backend creation TodoController and service management TODO.

Build full-stack applications using Java frameworks and front-end frameworks

Introduction

Full stack development involves all aspects of application development, from back-end to front-end. In this article, we will show how to build a full-stack application using a Java framework (Spring Boot) and a front-end framework (Angular).

Backend (Java)

Create a Spring Boot project

Use SpringBoot Initializr to create a new project and specify the following dependencies:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

Create a controller

Create a controller class in the src/main/java directory, such as HomeController.java:

@RestController
public class HomeController {

    @GetMapping("/")
    public String home() {
        return "Hello, World!";
    }

}

Front-end (Angular)

Create an Angular project

Create a new project using the Angular CLI:

ng new my-app --routing

Create component

Create the component in the src/app directory, for example home.component.ts:

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

@Component({
  selector: 'home',
  templateUrl: './home.component.html'
})
export class HomeComponent {
  message = "Hello, World!";
}

Connect the backend and frontend

Configure the backend API

In the Spring Boot configuration file (application. properties):

server.port=8080
spring.mvc.pathmatch.matching-strategy=ANT

Update Angular service

app in the src/app directory. Update service in module.ts:

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

@NgModule({
  imports: [
    BrowserModule,
    HttpClientModule,
    AppRoutingModule
  ],
  ...
})
export class AppModule { }

Practical case: Create a simple TODO application

Backend

• Create TodoController.java to handle TODO operations.
• Define Todo entities and TodoService to manage TODO.

Front end

• Create todo.component.ts to display the TODO list.
• Use httpClient to send requests to the API.

Conclusion

By using Java frameworks and front-end frameworks, we can build full-stack applications and separate the development of back-end and front-end. This improves code maintainability and reusability.

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