hibernate多对多注解式开发

@Entity                                                                  //实体
@Table(name = "Game")                                                   //表名
public class Game {
    @Id                                                                   //指定主键
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "sql_Game")      //主键生成策略
    @SequenceGenerator(name="sql_Game",sequenceName = "sql_Game",allocationSize = 1,initialValue = 1)   //声明主键的生成策略
    private Integer gid;

    @Column
    private String gname;

    @ManyToMany(cascade = CascadeType.ALL)                     //指定多对多的关系，同时设置级联

    //制定第三张表，指定本表与中间表的外键对应，另一张表与第三张表的外键的对应关系
    @JoinTable(name="PG",joinColumns = {@JoinColumn(name = "gid")},inverseJoinColumns = {@JoinColumn(name = "pid")})
    private Set<Player> player=new HashSet<Player>();

    public Integer getGid() {
        return gid;
    }

    public void setGid(Integer gid) {
        this.gid = gid;
    }

    public String getGname() {
        return gname;
    }

    public void setGname(String gname) {
        this.gname = gname;
    }

    public Set<Player> getPlayer() {
        return player;
    }

    public void setPlayer(Set<Player> player) {
        this.player = player;
    }
}

@Entity
@Table(name = "Player")
public class Player {
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "sql_Play")
    @SequenceGenerator(name="sql_Play",sequenceName = "sql_Play",allocationSize = 1,initialValue = 1)
    private Integer pid;

    @Column
    private String pname;

    @ManyToMany(cascade = CascadeType.ALL,mappedBy = "player")
    private Set<Game> game=new HashSet<Game>();

    public Integer getPid() {
        return pid;
    }

    public void setPid(Integer pid) {
        this.pid = pid;
    }

    public String getPname() {
        return pname;
    }

    public void setPname(String pname) {
        this.pname = pname;
    }

    public Set<Game> getGame() {
        return game;
    }

    public void setGame(Set<Game> game) {
        this.game = game;
    }
}

 @Test
    public void test01(){
        Game game1=new Game();
        game1.setGname("CS");
        Game game2=new Game();
        game2.setGname("C#");
        Player player1=new Player();
        player1.setPname("吃鸡");
        Player player2=new Player();
        player2.setPname("王者荣耀");
        game1.getPlayer().add(player1);
        game1.getPlayer().add(player2);
        game2.getPlayer().add(player1);
        game2.getPlayer().add(player2);

        player1.getGame().add(game1);
        player1.getGame().add(game2);
        player2.getGame().add(game1);
        player2.getGame().add(game2);
        session.save(game1);
        session.save(game2);
        tx.commit();
        System.out.println("ok!");
    }

只需要在主表做级连就可以了，上面的代码只是简单的测试 。