What are the most needed things to build a Maven Project with restservice with JPA, spring and unit testing with pom.xml dependencies?

It would be good if someone can post sample codes too! Thanks in advance!

i have tried this code for a bean class,

@Entity @Table(name = "language") @JsonIdentityInfo(generator = ObjectIdGenerators.IntSequenceGenerator.class, property = "@id") public class Language {

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "la_id")
private int id;

@Column(name = "la_name")
private String name;



public Language() {
    super();
    // TODO Auto-generated constructor stub
}

public Language(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;
}

@Override
public String toString() {
    return "Language [id=" + id + ", name=" + name + "]";
}

}