使用hibernate session get方法检索对象集合

Question

嗨，我告诉你我有一个Team类，其中包含我使用方法getPlayers（）获得的Set Player类型的对象列表。但是这个列表总是很快，虽然Team对象本身不会在通过get方法加载后甚至加载会话对象（Session.get（Team.class，new Integer（1））。我注意到即使数据库远非空白。

你能帮帮我吗？

Team.java

public class Team { 

private int idteam;
private String nom;
private Set<Player> players = new HashSet<Player>();
private Coach coach;


public Team (){
    super();
}

public Team(int team_Id, String nom,Coach coach, Set<Player> players) {
    super();
    idteam = team_Id;
    this.nom = nom;
    this.players = players;
    this.coach = coach;
}

public Team(int team_Id, String nom,Coach coach) {
    super();
    idteam = team_Id;
    this.nom = nom;
    this.players = players;
    this.coach = coach;
}

public int getidteam() {
    return idteam;
}


public void setidteam(int team_Id) {
    idteam = team_Id;
}

public String getNom() {
    return nom;
}

public void setNom(String nom) {
    this.nom = nom;
}

public Set<Player> getPlayers() {
    return players;
    }

public void setPlayers(Set<Player> players) {
    this.players = players;
}

public Coach getCoach() {
    return coach;
}

public void setCoach(Coach coach) {
    this.coach = coach;
}

}

Player.java

public class Player {

private int Player_Id;
private Team team;
private String nom;
private String prenom;


public Player(int player_Id, String nom, String prenom, Team team) {
    super();
    Player_Id = player_Id;
    this.nom = nom;
    this.prenom = prenom;
    this.team=team;
}

public Player(int player_Id, String nom, String prenom) {
    super();
    Player_Id = player_Id;
    this.nom = nom;
    this.prenom = prenom;

}

public Player() {
    super();

}

public int getPlayer_Id() {
    return Player_Id;
}

public void setPlayer_Id(int player_Id) {
    Player_Id = player_Id;
}

public String getNom() {
    return nom;
}

public void setNom(String nom) {
    this.nom = nom;
}

public String getPrenom() {
    return prenom;
}

public void setPrenom(String prenom) {
    this.prenom = prenom;
}



public Team getTeam() {
    return team;
}



public void setTeam(Team team) {
    this.team = team;
}


public String toString(){

    return " " +this.nom +  " " + this.prenom + " |";
}

}

player.hbm.xml

    <class name="foot.Player" table="PLAYER">
    <id name="Player_Id" column="ID_PLAYER">
        <generator class="native" />
    </id>
    <property name="nom">
        <column name="NOM" />
    </property>
    <property name="prenom">
        <column name="PRENOM" />
    </property>
    <many-to-one name="team" class="foot.Team" column="ID_TEAM"
        cascade="all"></many-to-one>
</class>

team.hbm.xml

    <class name="foot.Team" table="TEAM">
    <id name="idteam" column="ID_TEAM">
        <generator class="native" />
    </id>
    <property name="nom">
        <column name="NOM" />
    </property>
    <many-to-one name="coach" class="foot.Coach" column="ID_COACH"
        cascade="all" not-null="true" />

    <set name="players" cascade="all" inverse="true">
        <key column="ID_TEAM" not-null="true" />
        <one-to-many class="foot.Player" />
    </set>
</class>

main.java

        Session session = HibernateUtil.getSessionFactory().openSession();

    Transaction tx = null;
    try {
        tx = session.beginTransaction();

        Coach coach = new Coach(1, "galles", "charles");
        Team team1 = new Team(1, "france", coach);
        Player p1 = new Player(1, "anelka", "nicolas");
        Player p2 = new Player(2, "henry", "thierry");

        p1.setTeam(team1);
        session.merge(p1);
        p2.setTeam(team1);
        session.merge(p2);
        Team p = (Team) session.get(Team.class, new Integer(1));
        System.out.println(p.getNom() + " " + p.getCoach().getNom() + " "
                + p.getPlayers().size());

        session.flush();
        tx.commit();
    } catch (Exception e) {
        if (tx != null) {
            tx.rollback();          
        }
        throw e;
    } finally {
        session.close();

    }

    HibernateUtil.getSessionFactory().close();

PS：我使用HIBERNATE 4.3.5 FINAL

感谢。