UnsatisfiedDependencyException, BeanCreationException, and IllegalArgumentException errors-CodePudding

I am creating a project that functions like an ecommerce website, but I keep getting the errors mentioned in the title. I tried looking on other threads, and they talked about adding different annotations to the classes. For example, I added the @EntityScan and @ComponentScan annotations to my main class, but I am still getting the same errors. Here are the exact error messages, and below that is my code:

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'categoryService': Unsatisfied dependency expressed through field 'categoryRepository': Error creating bean with name 'categoryRepository' defined in com.ecommerce.website.repository.CategoryRepository defined in @EnableJpaRepositories declared on EcommerceWebsiteApplication: Not a managed type: class com.ecommerce.website.model.Category
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:712) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:692) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:127) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:481) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1397) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:598) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:521) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:961) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:915) ~[spring-context-6.0.2.jar:6.0.2]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:584) ~[spring-context-6.0.2.jar:6.0.2]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.0.0.jar:3.0.0]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:730) ~[spring-boot-3.0.0.jar:3.0.0]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:432) ~[spring-boot-3.0.0.jar:3.0.0]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) ~[spring-boot-3.0.0.jar:3.0.0]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1302) ~[spring-boot-3.0.0.jar:3.0.0]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1291) ~[spring-boot-3.0.0.jar:3.0.0]
    at com.ecommerce.website.EcommerceWebsiteApplication.main(EcommerceWebsiteApplication.java:19) ~[classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'categoryRepository' defined in com.ecommerce.website.repository.CategoryRepository defined in @EnableJpaRepositories declared on EcommerceWebsiteApplication: Not a managed type: class com.ecommerce.website.model.Category
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1751) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:599) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:521) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1405) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1325) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:709) ~[spring-beans-6.0.2.jar:6.0.2]
    ... 20 common frames omitted
Caused by: java.lang.IllegalArgumentException: Not a managed type: class com.ecommerce.website.model.Category
    at org.hibernate.metamodel.model.domain.internal.JpaMetamodelImpl.managedType(JpaMetamodelImpl.java:181) ~[hibernate-core-6.1.5.Final.jar:6.1.5.Final]
    at org.hibernate.metamodel.model.domain.internal.MappingMetamodelImpl.managedType(MappingMetamodelImpl.java:496) ~[hibernate-core-6.1.5.Final.jar:6.1.5.Final]
    at org.hibernate.metamodel.model.domain.internal.MappingMetamodelImpl.managedType(MappingMetamodelImpl.java:99) ~[hibernate-core-6.1.5.Final.jar:6.1.5.Final]
    at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:77) ~[spring-data-jpa-3.0.0.jar:3.0.0]
    at org.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getEntityInformation(JpaEntityInformationSupport.java:69) ~[spring-data-jpa-3.0.0.jar:3.0.0]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:246) ~[spring-data-jpa-3.0.0.jar:3.0.0]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:211) ~[spring-data-jpa-3.0.0.jar:3.0.0]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:194) ~[spring-data-jpa-3.0.0.jar:3.0.0]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:81) ~[spring-data-jpa-3.0.0.jar:3.0.0]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:317) ~[spring-data-commons-3.0.0.jar:3.0.0]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$5(RepositoryFactoryBeanSupport.java:279) ~[spring-data-commons-3.0.0.jar:3.0.0]
    at org.springframework.data.util.Lazy.getNullable(Lazy.java:229) ~[spring-data-commons-3.0.0.jar:3.0.0]
    at org.springframework.data.util.Lazy.get(Lazy.java:113) ~[spring-data-commons-3.0.0.jar:3.0.0]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:285) ~[spring-data-commons-3.0.0.jar:3.0.0]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:132) ~[spring-data-jpa-3.0.0.jar:3.0.0]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1797) ~[spring-beans-6.0.2.jar:6.0.2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1747) ~[spring-beans-6.0.2.jar:6.0.2]
    ... 30 common frames omitted

Main class

@SpringBootApplication
@EnableJpaRepositories("com.ecommerce.website.repository")
@ComponentScan("com.ecommerce.website.service")
@EntityScan("com.ecommerce.website.model")
public class EcommerceWebsiteApplication {

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

}

Controller class

package com.ecommerce.website.controller;

import java.util.Optional;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;

import com.ecommerce.website.model.Category;
import com.ecommerce.website.service.CategoryService;

//Category ID still having issues
//Need to add methods for Category delete and update methods 
@Controller
public class AdminController {
    
    //Injecting dependency
    @Autowired
    CategoryService categoryService;
    
    //This method maps for /admin endpoint. It shows the adminHome.html page. The method is @GetMapping because you are getting information 
    //@return the adminHome page
    @GetMapping("/admin")
    public String adminHome() {
        
        //Display html page
        return "adminHome";
    }
    
    //This method maps for /admin/categories endpoint. It shows the categories.html page. The method is @GetMapping because you are getting information
    //@return the categories page 
    @GetMapping("/admin/categories")
    public String getCat(Model model) {
        
        model.addAttribute("categories", categoryService.getAllCategories());
        
        //Display html page
        return "categories";
    }
    
    //This method maps for /admin/categories endpoint. It shows the categoriesAdd.html page, but before that, it creates
    //a model that is sent to the html file via Thymeleaf. The categoriesAdd.html page is a form for adding a category
    //The method is @GetMapping because you are getting information
    //@param model will hold the category object so that the form can add information to it 
    //@return the categoriesAdd page 
    @GetMapping("/admin/categories/add")
    public String getCatAdd(Model model) {
        
        //Adding the model name "category", and creating a new Category object and putting it in the model
        model.addAttribute("category", new Category());
        
        //Display html page
        return "categoriesAdd";
    }
    
    //This method maps for /admin/categories endpoint. It allows the user to add a category to the list of categories
    //The method is @PostMapping because you are sending information
    //@param category gets its value from the ModelAttribute, which gets its value from the form
    //@return the categories page 
    @PostMapping("/admin/categories/add")
    public String postCatAdd(@ModelAttribute("category") Category category) {
        
        //Calling categoryService to add the category
        categoryService.addCategory(category);
        
        //Redirecting to page that shows all categories 
        return "redirect:/admin/categories";
    }

Service

package com.ecommerce.website.service;

import java.util.List;

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

import com.ecommerce.website.model.Category;
import com.ecommerce.website.repository.CategoryRepository;

@Service
public class CategoryService {

    //Injecting dependency 
    @Autowired
    CategoryRepository categoryRepository;
    
    //This method calls categoryRepository to add a category to the database  
    //@param category is the category that is being added 
    public void addCategory(Category category) {
        
        //Saving the category to the database 
        categoryRepository.save(category);
    }
    
    //This method calls categoryRepository to retrieve a list of categories 
    //@return the list of categories  
    public List<Category> getAllCategories() {
        return categoryRepository.findAll();
    }
    

    
//  public Optional<Category> findCategoryById(String id) {
//      
//      Optional<Category> category = categoryRepository.findById(id);
//      
//      return category;
//      
//  }
}

Repository

package com.ecommerce.website.repository;

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

import com.ecommerce.website.model.Category;

@Repository
public interface CategoryRepository extends JpaRepository<Category, String> {

    

}

POJO

package com.ecommerce.website.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Table;

import org.springframework.data.annotation.Id;

@Entity
@Table
public class Category {
    
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "category_id")
    private int id;
    
    private String name;
    
    
    public Category() {
        
    }
    
    public Category(int id, String name) {
        super();
        this.id = id;
        this.name = name;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    } 
    
    
}

application.properties

spring.h2.console.enabled=true

spring.datasource.url=jdbc:h2:file:./db
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=

spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
spring.jpa.hibernate.ddl-auto=update

server.port=8080

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.0.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.ecommerce</groupId>
    <artifactId>ecommerce-website</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>ecommerce-website</name>
    <description>Ecommerce website using Spring Boot</description>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
    
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
            <version>3.0.0</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-validation -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
            <version>3.0.0</version>
        </dependency>
        
        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.1-api</artifactId>
            <version>1.0.2.Final</version>
        </dependency>
        
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-security -->
        <!--<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
            <version>3.0.0</version>
        </dependency>-->
        
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>
        

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

CodePudding user response：

Please remove this dependency from pom.xml and try again.

        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.1-api</artifactId>
            <version>1.0.2.Final</version>
        </dependency>

CodePudding user response：

keep only this annotation

@SpringBootApplication
public class EcommerceWebsiteApplication {

public static void main(String[] args) {
    SpringApplication.run(EcommerceWebsiteApplication.class, args);
}
 @Autowired
 private CategoryRepository categoryRepository;

}

you nedd to add an interface like this

public interface CategoryService2 {
public void addCategory(Category category);
public List<Category> getAllCategories();
}

and modify the classe like this:

@Service
public class CategoryService implements CategoryService2{

private CategoryRepository categoryRepository;

public CategoryService(categoryRepository){
super();
this.categoryRepository = categoryRepository;
}
@Override
public void addCategory(Category category) {
    
    categoryRepository.save(category);
}
@Override  
public List<Category> getAllCategories() {
    return categoryRepository.findAll();
}

and remove the annotation @Repository from CategoryRepository and try to modify String in Long

public interface CategoryRepository extends JpaRepository<Category, Long> {

 }

Modify the class Category like this.

@Entity
@Table(name = "Ecommerce")
public class Category {

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "category_id")
private Long id;
@Column(name = "name")
private String name;


public Category() {
    
}

public Category(int id, String name) {
    super();
    this.id = id;
    this.name = name;
}

public int getId() {
    return id;
}

public void setId(int id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
} 
    
}

and try with and without this dependecy:

<dependency>
        <groupId>org.hibernate.javax.persistence</groupId>
        <artifactId>hibernate-jpa-2.1-api</artifactId>
        <version>1.0.2.Final</version>
    </dependency>

modify the controllore like this:

@Controller
public class AdminController {
private CategoryService2 categoryService2;
public AdminController(CategoryService2 categoryService){
super();
this.categoryService2 = categoryService2;
}

//This method maps for /admin endpoint. It shows the adminHome.html page. The method is @GetMapping because you are getting information 
//@return the adminHome page
@GetMapping("/admin")
public String adminHome() {
    
    //Display html page
    return "adminHome";
}

//This method maps for /admin/categories endpoint. It shows the categories.html page. The method is @GetMapping because you are getting information
//@return the categories page 
@GetMapping("/admin/categories")
public String getCat(Model model) {
    
    model.addAttribute("categories", categoryService2.getAllCategories());
    
    //Display html page
    return "categories";
}

//This method maps for /admin/categories endpoint. It shows the categoriesAdd.html page, but before that, it creates
//a model that is sent to the html file via Thymeleaf. The categoriesAdd.html page is a form for adding a category
//The method is @GetMapping because you are getting information
//@param model will hold the category object so that the form can add information to it 
//@return the categoriesAdd page 
@GetMapping("/admin/categories/add")
public String getCatAdd(Model model) {
    
    //Adding the model name "category", and creating a new Category object and putting it in the model
    model.addAttribute("category", new Category());
    
    //Display html page
    return "categoriesAdd";
}

//This method maps for /admin/categories endpoint. It allows the user to add a category to the list of categories
//The method is @PostMapping because you are sending information
//@param category gets its value from the ModelAttribute, which gets its value from the form
//@return the categories page 
@PostMapping("/admin/categories/add")
public String postCatAdd(@ModelAttribute("category") Category category) {
    
    //Calling categoryService to add the category
    categoryService2.addCategory(category);
    
    //Redirecting to page that shows all categories 
    return "redirect:/admin/categories";
}