Answer: Java back-end framework and Angular front-end framework can be integrated to provide a powerful combination for building modern web applications. Steps: Create Java backend project, select Spring Web and Spring Data JPA dependencies. Define model and repository interfaces. Create a REST controller and provide endpoints. Create an Angular project. Add Spring Boot Java dependency. Configure CORS. Integrate Angular in Angular components.
Integration of Java back-end framework and Angular front-end framework
Java back-end framework and Angular front-end framework are important for building modern web applications A powerful combination of programs. This article will introduce how to integrate the Java framework and the Angular framework, including practical cases of Spring Boot and Angular.
Steps:
1. Create a Java backend project
Use Spring Initializr to create a Spring Boot project, select the following Dependencies:
- Spring Web
- Spring Data JPA
## 2. Define the model and repository
Create a Product entity in the model package and define a ProductRepository repository interface.3. Create a REST controller
Create a ProductController in the controller package and provide a REST endpoint to interact with the Product entity.4. Create an Angular project
Run the following command in the project folder to create an Angular project:ng new [project-name]
5. Add Spring Boot Java dependency
In the package.json file of the Angular project, add the Spring Boot Java dependency:"dependencies": { ... "spring-boot": "^2.6.6", ... }
6. Configure CORS
In the Spring Boot application, configure Cross-Origin Resource Sharing (CORS) in the Web Security Configuration:@Configuration public class WebSecurityConfig extends WebSecurityConfigurerAdapter { @Override protected void configure(HttpSecurity http) throws Exception { http.cors().and() ... } }
7. Integrate Angular
In the Angular component, Use the endpoints provided by the Spring Boot Java service. The following example shows how to get the product list from ProductController:import { HttpClient } from '@angular/common/http'; @Component({ selector: 'app-product-list', templateUrl: './product-list.component.html', styleUrls: ['./product-list.component.css'] }) export class ProductListComponent { products: Product[]; constructor(private http: HttpClient) {} ngOnInit(): void { this.http.get<Product[]>('/api/products').subscribe(products => { this.products = products; }); } }
Practical case: Spring Boot and Angular
This practical case creates a simple product management application.- Backend: Spring Boot is used to create a RESTful API to manage products.
- Front-end: Angular is used to create the user interface that allows users to view and create products.
Run the application:
- In the Java project, run
- mvn spring-boot:run
.
In the Angular project, run - ng serve
.
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