使用Java和XML数据库的CRUD

Question

我希望使用java在XML数据库中添加，编辑，删除和删除条目。下面的代码包含我的XML数据库中条目的所有getter和setter。如何从我的XML中获取值到适当的对象？

public class contact implements Serializable{

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column
private int Id;
@Column
private String firstname;
@Column
private String lastname;
@Column
private String email;

public int getId() {
    return Id;
}

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

public String getFirstname() {
    return firstname;
}

public void setFirstname(String firstname) {
    this.firstname = firstname;
}

public String getLastname() {
    return lastname;
}

public void setLastname(String lastname) {
    this.lastname = lastname;
}

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public contact(int Id, String firstname, String lastname, String email) {
    this.Id = Id;
    this.firstname = firstname;
    this.lastname = lastname;
    this.email = email;
}