提问：unsaved的问题

team类

public class team {
	public team(); { 
	  } 

	  private String name; 
	  private Long team_id; 
	  private Set players = new HashSet();; 
	  public String getName(); { 
		return name; 
	  } 
	  public void setName(String name); { 
		this.name = name; 
	  } 
	  public Set getPlayers(); { 
		return players; 
	  } 
	  public void setPlayers(Set players); { 
		this.players = players; 
	  } 
	  public Long getTeam_id(); { 
		return team_id; 
	  } 
	  public void setTeam_id(Long team_id); { 
		this.team_id = team_id; 
	  } 

	  public boolean equals(Object o); { 
		if (this == o); 
		  return true; 
		if (this.team_id == null); 
		  return false; 
		if (! (o instanceof Player);); 
		  return false; 
		team team = (team); o; 
		return this.team_id.equals(team.team_id);; 
	  } 

	  public int hashCode(); { 
		return this.team_id == null ? super.hashCode(); : this.team_id.hashCode();; 
	  }


}

Player类

public class Player {
	public Player(); { 
	  } 

	  private Long id; 
	  private team belongTeam; 
	  private String name; 

	  public boolean equals(Object o); { 
		if (this == o); 
		  return true; 
		if (this.id == null); 
		  return false; 
		if (! (o instanceof Player);); 
		  return false; 
		Player c = (Player); o; 
		return this.id.equals(c.id);; 
	  } 

	  public int hashCode(); { 
		return this.id == null ? super.hashCode(); : this.id.hashCode();; 
	  } 

	  public Long getId(); { 
		return id; 
	  } 
	  public String getName(); { 
		return name; 
	  } 
	  public void setId(Long id); { 
		this.id = id; 
	  } 
	  public void setName(String name); { 
		this.name = name; 
	  } 
	  public team getBelongTeam(); { 
		return belongTeam; 
	  } 
	  public void setBelongTeam(team belongTeam); { 
		this.belongTeam = belongTeam; 
	  } 


}

Team.hbm.xml

<?xml version="1.0"?> 
<!-- edited with XMLSPY v5 rel. 2 U (http://www.xmlspy.com); by sunliqun (ces); --> 
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" 

       "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd"> 
<hibernate-mapping> 
   <class name="team" table="TEAM"> 
      <id name="team_id" column="TEAM_ID" type="java.lang.Long" unsaved-value="null"> 
         <generator class="assigned"> 
         </generator> 
      </id> 
      <property name="name" column="NAME" type="java.lang.String"/> 
      <set name="players" lazy="true" cascade="all-delete-orphan" inverse="true" sort="unsorted"> 
         <key column="TEAM_ID"/> 
         <one-to-many class="Player"/> 
      </set> 
   </class> 
</hibernate-mapping>

Player.hbm.xml

<?xml version="1.0"?> 
<!-- edited with XMLSPY v5 rel. 2 U (http://www.xmlspy.com); by sunliqun (ces); --> 
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" 

       "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd"> 
<hibernate-mapping> 
   <class name="Player" table="PLAYER"> 
      <id name="id" column="PLAYER_ID" type="java.lang.Long" unsaved-value="none"> 
         <generator class="sequence"> 
         </generator> 
      </id> 
      <property name="name" column="NAME" type="java.lang.String"/> 
      <many-to-one name="belongTeam" class="team" cascade="save-update" column="TEAM_ID" /> 
   </class> 
</hibernate-mapping>

测试代码

team t = (team);session.load(team.class,new Long(17););; 
   //   Player p = (Player);t.getPlayers();.iterator();.next();; 
   Player p = new Player();;
      p.setName("!80887");; 
      t.getPlayers();.add(p);;
      session.update(t);;

现在的问题是,如果用Player p=(Player)t.getPlayers().interator().next()这段代码那么无论Player.hbm.xml中unsaved-value设置为什么,那么都是update;
而,如果注释掉这段代码而用后面这段代码,那么无论Player.hbm.xml中unsaved-value设置为什么,那么都是insert;
从上面的测试来看,好象只要是新建的对象就是insert,load上来的就是update
怎么和坛主说的不一样呢
请坛主解释一下.

楼上的兄弟，你是否听过"没有实践，就没有发言权" 这句话，你在没有实践之前，不要到处跟风，无论是自动分配的，还是手工分配的结果都是我说的那样

team t = (team);session.load(team.class,new Long(17););; 
   //   Player p = (Player);t.getPlayers();.iterator();.next();; 
   Player p = new Player();; 
      p.setName("!80887");; 
      t.getPlayers();.add(p);; 
      session.update(t);; 

加上一句

 //   Player p = (Player);t.getPlayers();.iterator();.next();; 
   Player p = new Player();; 
      p.setName("!80887");; 

      p.setTeam(t);;

      t.getPlayers();.add(p);; 
      session.update(t);; 

应该就可以了把

加上那句，是用来维护外键的，如果不加这句，那么外键就是null
所以加不加，都是上面的结果，只是外键的结果不一样罢了

所以我觉得unsaved-value只对save的时候起作用，而对其他操作无效
在有对于session.flush().这个语句我有点疑惑

 team t = (team);session.load(team.class,new Long(18););; 
    Player p = (Player);t.getPlayers();.iterator();.next();; 
 //  Player p = new Player();;

 p.setName("k6865kdkd");;

   t.getPlayers();.add(p);;
 //  p.setBelongTeam(t);;
      session.flush();;

这种方式只要flush一下，而前面不用显式的调用update(),那么它就会知道你要做什么，并发送相应的语句
而对于save的时候，你必须在flush之前调用save那么他才知道你要做insert操作，所以我现在想问的是flush是怎么一个操作过程