Орхан Гасанлы

*Обратите внимание: переменные с final - это константы. При этом их принято писать заглавными буквами - тут CamelStyle не работает :

In java, making something final means that it can't be reasigned to another reference to another instance, but if it's a reference to a mutable class, the mutable values inside the class can still be modified.

For example, a final String is a constant because Strings are immutable in Java, but a final ArrayList means that you cannot assign it to another ArrayList, but you can still add and remove elements to that ArrayList

Есть приложение, читающее файлы из файловой системы и загружающее в БД часть содержимого.

Есть сервисные классы, в них ряд методов, но возвращаемые типы в методах повторяются.

Хотелось бы сделать без спринг шелла, без команд в мейне.

-----------------------------------com.example.Example.java-----------------------------------

package com.example;

import java.util.List;
import javax.annotation.Generated;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

@Generated("jsonschema2pojo")
public class Example {

@SerializedName("total_count")
@Expose
public Long totalCount;
@SerializedName("incomplete_results")
@Expose
public Boolean incompleteResults;
@SerializedName("items")
@Expose
public List<Item> items = null;

}
-----------------------------------com.example.Item.java-----------------------------------

package com.example;

import javax.annotation.Generated;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

@Generated("jsonschema2pojo")
public class Item {

@SerializedName("id")
@Expose
public Long id;
@SerializedName("node_id")
@Expose
public String nodeId;
@SerializedName("name")
@Expose
public String name;
@SerializedName("full_name")
@Expose
public String fullName;
@SerializedName("private")
@Expose
public Boolean _private;
@SerializedName("owner")
@Expose
public Owner owner;
@SerializedName("html_url")
@Expose
public String htmlUrl;
@SerializedName("description")
@Expose
public String description;
@SerializedName("fork")
@Expose
public Boolean fork;

}
-----------------------------------com.example.Owner.java-----------------------------------

package com.example;

import javax.annotation.Generated;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

@Generated("jsonschema2pojo")
public class Owner {

@SerializedName("login")
@Expose
public String login;
@SerializedName("id")
@Expose
public Long id;
@SerializedName("node_id")
@Expose
public String nodeId;
@SerializedName("avatar_url")
@Expose
public String avatarUrl;
@SerializedName("gravatar_id")
@Expose
public String gravatarId;
@SerializedName("url")
@Expose
public String url;
@SerializedName("html_url")
@Expose
public String htmlUrl;
@SerializedName("followers_url")
@Expose
public String followersUrl;
@SerializedName("following_url")
@Expose
public String followingUrl;
@SerializedName("gists_url")
@Expose
public String gistsUrl;
@SerializedName("starred_url")
@Expose
public String starredUrl;
@SerializedName("subscriptions_url")
@Expose
public String subscriptionsUrl;
@SerializedName("organizations_url")
@Expose
public String organizationsUrl;
@SerializedName("repos_url")
@Expose
public String reposUrl;
@SerializedName("events_url")
@Expose
public String eventsUrl;
@SerializedName("received_events_url")
@Expose
public String receivedEventsUrl;
@SerializedName("type")
@Expose
public String type;
@SerializedName("site_admin")
@Expose
public Boolean siteAdmin;

}

@Entity
@Data
@Table(name = "users")
@Builder
@AllArgsConstructor
@NoArgsConstructor
@EqualsAndHashCode(callSuper = false)
public class User {

  //...

  @JsonBackReference
  @ToString.Exclude
  @ManyToMany(fetch = FetchType.EAGER)
  @JoinTable(
      name = "users_roles",
      joinColumns = @JoinColumn(name = "user_id"),
      inverseJoinColumns = @JoinColumn(name = "role_id"))
  private Set<Role> roles;

}

@Entity
@Data
@EqualsAndHashCode(callSuper = false)
@Table(name = "roles")
public class Role implements GrantedAuthority {

  @Id
  @GeneratedValue(strategy = GenerationType.SEQUENCE)
  private Long roleId;

  @JsonBackReference
  @ToString.Exclude
  @ManyToMany(mappedBy = "roles")
  private Collection<User> users;

  @JsonBackReference
  @ToString.Exclude
  @ManyToMany
  @JoinTable(
      name = "roles_privileges",
      joinColumns = @JoinColumn(name = "role_id"),
      inverseJoinColumns = @JoinColumn(name = "privilege_id"))
  private Collection<Privilege> privileges;

  @Enumerated(EnumType.STRING)
  private UserRole name;

  public Role() {
    super();
  }

  public Role(UserRole name) {
    super();
    this.name = name;
  }

  @Override
  public String getAuthority() {
    return name.name();
  }
}

public enum UserRole {
  USER,
  ADMIN
}

@Entity
@Data
@EqualsAndHashCode(callSuper = false)
@Table(name = "privileges")
public class Privilege {

  

  @Enumerated(EnumType.STRING)
  private UserPrivilege name;

  @JsonBackReference
  @ToString.Exclude
  @ManyToMany(mappedBy = "privileges")
  private Collection<Role> roles;


}

public enum UserPrivilege {
  ADMIN_PRIVILEGE,
  READ_PRIVILEGE,
  WRITING_COMMENTS_PRIVILEGE
}

Scanner scanner = new Scanner(System.in);
        System.out.println("Введите слово\n");
        String word = scanner.nextLine();
        String[] splittedWord = word.split("");
        for (String character : splittedWord) {
            System.out.print(character.repeat(3));
        }

Подскажите как лучше изучать spring, какой современный стек?

@PostMapping(path = "/save", 
   produces = {"application/xml", "text/xml"}, consumes = 
                MediaType.ALL_VALUE)
  public ResponseEntity<Response> pay(@RequestBody Request request){
    service.save(request);
// тут конвертируем request в response
    return ResponseEntity.ok(response);
      }
   }

public class response { 
	public int p_id;
	public int status;
	public String message;
	public int id;
	public Date dts;
	public String text;
}