Backend

package com.example.ecommerce.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

//WebConfiguration

@Configuration
public class WebConfig implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/api/**")  // Apply CORS configuration to all endpoints under /api
                .allowedOrigins("http://localhost:5173")  // Allow requests from this origin
                .allowedMethods("GET", "POST", "PUT", "DELETE");  // Allow these methods
    }
}

Controllers

package com.example.ecommerce.controllers;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.example.ecommerce.entities.Producto;
import com.example.ecommerce.services.ProductoService;

import java.util.List;

//Los controladores manejan las solicitudes HTTP y llaman a los servicios correspondientes.

@RestController
@RequestMapping("/api/productos")
public class ProductoController {

@Autowired
private ProductoService productoService;

@GetMapping
public List<Producto> obtenerTodos(){
    return productoService.obtenerTodos();
}

@PostMapping
public Producto crearProducto(@RequestBody Producto producto){
    return productoService.crearProducto(producto);
}

}
Entities
package com.example.ecommerce.entities;

import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;

@Entity
public class Producto {

//ACA SE DEFINEN LAS ENTIDADES JPA PARA LA CLASE PRODUCTO
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)

private Long id;

private String nombre;
private Double precio;

public Producto(){
    
}

public Producto(String nombre, Double precio){
    this.nombre = nombre;
    this.precio = precio;
}

public Long getId(){
    return id;
}
public void setId(Long id){
    this.id = id;
}

public String getNombre(){
    return nombre;
}
public void setNombre(String nombre){
    this.nombre = nombre;
}

public Double getPrecio(){
    return precio;
}
public void setPrecio(Double precio){
    this.precio = precio;
}

}
Repository
package com.example.ecommerce.repositories;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import com.example.ecommerce.entities.Producto;

@Repository
public interface ProductoRepository extends JpaRepository<Producto, Long>{

}
Repository by Lucas
package com.example.uade.tpo.ecommerce.repositories;

import java.util.List;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.stereotype.Repository;

import com.example.uade.tpo.ecommerce.entities.Artwork;

@Repository
public interface ArtworkRepository extends JpaRepository<Artwork, Long> {
@Query(value = "select a from Artwork a where a.artist = ?1")
public List<Artwork> findAllByUserId(Long id);
}
Services
package com.example.ecommerce.services;

import java.util.List;
import java.util.Optional;

import com.example.ecommerce.entities.Ruedas;

public interface RuedasService {
List<Ruedas> findAll();

Optional<Ruedas> findById(Long id);

Ruedas save(Ruedas ruedas);

void deleteById(Long id);

}
Services Impl
@Service
public class RuedasServiceImpl implements RuedasService {
@Autowired
private RuedasRepository ruedasRepository;

@Override
public List<Ruedas> findAll(){
    return ruedasRepository.findAll();
}

@Override
public Optional<Ruedas> findById(Long id){
    return ruedasRepository.findById(id);
}

@Override
public Ruedas save(Ruedas ruedas){
    return ruedasRepository.save(ruedas);
}

@Override
public void deleteById(Long id){
    ruedasRepository.deleteById(id);
}

}
application properties
server.port=8080

spring.datasource.url=jdbc:mysql://localhost:3306/practicafinal
spring.datasource.username=root
spring.datasource.password=Facundo2554
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true

im trying to aprove an examn in the college`