Spring Data JPA CRUD Example

Last modified: July 4, 2020

Ask all your coding questions @ codequery.io

Spring Data JPA

Spring Data JPA Tutorial

Spring Data JPA Example

Spring Data JPA CRUD Example

Spring Data JPA vs Hibernate

Spring Data JPA Interview Questions

User Entity

package userservice.model;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class User {
    @Id
    @GeneratedValue
    private long id;

    private String name;

    public long getId(){
        return this.id;
    }

    public String getName(){
        return this.name;
    }

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

User Repository

package userservice.repository;

import userservice.model.User;
import org.springframework.data.repository.CrudRepository;

public interface UserRepository extends CrudRepository {
}

CRUD Examples

package userservice;

import userservice.model.User;
import userservice.repository.UserRepository;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class Application {

    private static final Logger log =
            LoggerFactory.getLogger(Application.class);

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

    @Bean
    public CommandLineRunner demo(UserRepository repo) {
        return (args) -> {
            //CREATE
            User user = new User();
            repo.save(user);

            //READ
            User savedUser = repo.findById(user.getId()).get();

            //UPDATE
            savedUser.setName("Ted");
            repo.save(savedUser);

            //DELETE
            repo.delete(savedUser);
        };
    }
}

You might also like: