How to solve getting bean error in spring boot-CodePudding

My spring project throwing error as follows

APPLICATION FAILED TO START

Description:

Field userDetailsService in required a bean of type 'org.springframework.security.core.userdetails.UserDetailsService' that could not be found.

The injection point has the following annotations: - @org.springframework.beans.factory.annotation.Autowired(required=true)

Action:

Consider defining a bean of type 'org.springframework.security.core.userdetails.UserDetailsService' in your configuration.

This is my controller

package org.studyeasy.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import org.studyeasy.entity.Post;
import org.studyeasy.services.PostsService;
@RestController
public class PostsController {
    @Autowired
    private PostsService service;
    
    @RequestMapping("/posts")
    public List<Post> getPosts(){
        return service.getPosts();
    }
    @RequestMapping("/posts/{id}")
    public Post getPost(@PathVariable int id) {
        return service.getPost(id);
    }
    
    @RequestMapping(method=RequestMethod.POST, value="/posts")
    public void addPost(@RequestBody Post listElement) {
         service.addPost(listElement);
    }
    
    @RequestMapping(method=RequestMethod.PUT, value="/posts/{id}")
    public void updatePost(@RequestBody Post post) {
         service.updatePost(post);
    }
    
    @RequestMapping(method=RequestMethod.DELETE, value="/posts/{id}")
    public void deletePost(@PathVariable int id) {
         service.deletePost(id);
    }
    
}

This is my entity class

package org.studyeasy.entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="posts")
public class Post {
    @Id
    @Column(name="id")
    int postId;
    @Column(name="title")
    String title;
    @Column(name="body")
    String body;
    
    public Post() {}
    public Post(int postId, String title, String body) {

        this.postId = postId;
        this.title = title;
        this.body = body;
    }

    public int getPostId() {
        return postId;
    }

    public void setPostId(int postId) {
        this.postId = postId;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getBody() {
        return body;
    }

    public void setBody(String body) {
        this.body = body;
    }

    @Override
    public String toString() {
        return "Post [postId="   postId   ", title="   title   ", body="   body   "]";
    }

}

This is repository class

package org.studyeasy.repository;

import org.springframework.data.repository.CrudRepository;
import org.studyeasy.entity.Post;

public interface PostRepository extends CrudRepository<Post, Integer> {
    

}

I'm new to spring boot so please help I'm not able to find where I'm making mistake

Thanks...

CodePudding user response：

I also faced same issue because i forgot to annotate my classes. Check weather you have annotated your service class as @Service and Repository as @Repository.

If this doesn't solve the issue than remove the unwanted dependencies from Pom file.

Hope this solves the issue.

CodePudding user response：

Add a bean for UserDetailsService

@Autowired
private UserDetailsService userDetailsService;

@Bean
public UserDetailsService userDetailsService() {
    return super.userDetailsService();
}

CodePudding user response：

You are not making the bean correctly. Use @Service annotation in your service implementation class.

CodePudding user response：

I think you have made some mistakes in annotation

There may be following reason

You may have missed any annotation related to @Component class like @Controller or @Service ect.
You may have done mistake in @Autowired annotation
May be you made some changes in main class So you need to check all these to solve this issue.

CodePudding user response：

As the error states, you need to create the UserDetailsService bean and configure it.

CodePudding user response：

Your error is not related to your snippet. Looks like you added a spring security depedency that you don't seem to use.

Either remove this depedency or if you need to retrive a user principal from Spring security : add a configuration that implements UserDetailsService (a Way to retrive a User from an authentication method) as asked.

https://www.boraji.com/spring-security-5-custom-userdetailsservice-example

CodePudding user response：

I think you are using any kind of authentication. and you didn't implement a userDetailsService interface.

@Service
public class UserPrincipalService implements UserDetailsService {
    private final UserRepository userRepository;

    @Autowired
    public UserPrincipalService(UserRepository userRepository) {
        this.userRepository = userRepository;
    }

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        Optional<User> user = userRepository.findUserByUserName(username);
        user.orElseThrow(() -> new UsernameNotFoundException("This user name is not found"));
        return new UserPrincipal(user.get());
    }
}

implement this class and load the user data for your data source.

CodePudding user response：

@Autowired
    private UserRepository userRepository;

    @Override
    public UserDetails loadUserByUsername(String username)throws UsernameNotFoundException {
        User user = userRepository.getUserByUsername(username);

        if (user == null) {
            throw new UsernameNotFoundException("Could not find user");
        }

        return new MyUserDetails(user);
    }

you can use constructor injection while define bean.

private User user;

public MyUserDetails(User user) {
    this.user = user;
}

and you can get by this in userDetails.