Do Nhu Vy Do Nhu Vy - 1 month ago 64
Java Question

Consider defining a bean of type 'com.ensat.services.ProductService' in your configuration

I have

package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@SpringBootApplication
@ComponentScan(basePackages = {"hello","com.ensat.controllers"})
@EntityScan("com.ensat.entities")
public class Application extends SpringBootServletInitializer {

@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(Application.class);
}

public static void main(String[] args) throws Exception {
SpringApplication.run(Application.class, args);
}

}


ProductController.java

package com.ensat.controllers;

import com.ensat.entities.Product;
import com.ensat.services.ProductService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

/**
* Product controller.
*/
@Controller
public class ProductController {

private ProductService productService;

@Autowired
public void setProductService(ProductService productService) {
this.productService = productService;
}

/**
* List all products.
*
* @param model
* @return
*/
@RequestMapping(value = "/products", method = RequestMethod.GET)
public String list(Model model) {
model.addAttribute("products", productService.listAllProducts());
System.out.println("Returning rpoducts:");
return "products";
}

/**
* View a specific product by its id.
*
* @param id
* @param model
* @return
*/
@RequestMapping("product/{id}")
public String showProduct(@PathVariable Integer id, Model model) {
model.addAttribute("product", productService.getProductById(id));
return "productshow";
}

// Afficher le formulaire de modification du Product
@RequestMapping("product/edit/{id}")
public String edit(@PathVariable Integer id, Model model) {
model.addAttribute("product", productService.getProductById(id));
return "productform";
}

/**
* New product.
*
* @param model
* @return
*/
@RequestMapping("product/new")
public String newProduct(Model model) {
model.addAttribute("product", new Product());
return "productform";
}

/**
* Save product to database.
*
* @param product
* @return
*/
@RequestMapping(value = "product", method = RequestMethod.POST)
public String saveProduct(Product product) {
productService.saveProduct(product);
return "redirect:/product/" + product.getId();
}

/**
* Delete product by its id.
*
* @param id
* @return
*/
@RequestMapping("product/delete/{id}")
public String delete(@PathVariable Integer id) {
productService.deleteProduct(id);
return "redirect:/products";
}

}


ProductService.java

package com.ensat.services;

import com.ensat.entities.Product;

public interface ProductService {

Iterable<Product> listAllProducts();

Product getProductById(Integer id);

Product saveProduct(Product product);

void deleteProduct(Integer id);

}


ProductServiceImpl.java

package com.ensat.services;

import com.ensat.entities.Product;
import com.ensat.repositories.ProductRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
* Product service implement.
*/
@Service
public class ProductServiceImpl implements ProductService {

private ProductRepository productRepository;

@Autowired
public void setProductRepository(ProductRepository productRepository) {
this.productRepository = productRepository;
}

@Override
public Iterable<Product> listAllProducts() {
return productRepository.findAll();
}

@Override
public Product getProductById(Integer id) {
return productRepository.findOne(id);
}

@Override
public Product saveProduct(Product product) {
return productRepository.save(product);
}

@Override
public void deleteProduct(Integer id) {
productRepository.delete(id);
}

}


This is my error:

***************************
APPLICATION FAILED TO START
***************************

Description:

Parameter 0 of method setProductService in com.ensat.controllers.ProductController required a bean of type 'com.ensat.services.ProductService' that could not be found.


Action:

Consider defining a bean of type 'com.ensat.services.ProductService' in your configuration.


I have full log: https://gist.github.com/donhuvy/b918e20eeeb7cbe3c4be4167d066f7fd

This is my full source code
https://github.com/donhuvy/accounting/commit/319bf6bc47997ff996308c890eba81a6fa7f1a93

How to fix error?

Answer

The bean is not created by Spring since componentScan attribute misses the package where ProductServiceImpl is located.

Besides,@EnableJpaRepositories is missing. So, Spring cannot wire your repository.

@SpringBootApplication
@ComponentScan(basePackages = {"hello","com.ensat.controllers"})
@EntityScan("com.ensat.entities")

should be replaced by :

@SpringBootApplication
@ComponentScan(basePackages = {"hello","com.ensat.controllers", "com.ensat.services";
})
@EntityScan("com.ensat.entities")
@EnableJpaRepositories("com.ensat.repositories")